1. One time multilayer is filled sand control and is annotated with layering and adopt integrated tubular column, its characterized in that: the pipe comprises an outer pipe column and an inner pipe column, wherein the inner pipe column is positioned in the outer pipe column;

the external pipe column comprises a top isolation assembly, a bypass overflowing screen pipe assembly, an isolation packer assembly and a bottom isolation assembly, wherein the top isolation assembly, the bypass overflowing screen pipe assembly, the isolation packer assembly, the bypass overflowing screen pipe assembly and the bottom isolation assembly are sequentially connected from top to bottom, the top isolation assembly and the bottom isolation assembly are respectively connected with the bypass overflowing screen pipe assembly, the head end and the tail end of the isolation packer assembly are respectively connected with the bypass overflowing screen pipe assembly, the number of the bypass overflowing screen pipe assembly and the isolation packer assembly is matched with the number of layers required by operation, and the number of the bypass overflowing screen pipe assembly is +1 of the number of the isolation packer assemblies;

the inner pipe column comprises a feeding tool, a washpipe, an inserted central pipe and a filling tool, wherein the head end of the feeding tool is connected with a drill rod or an oil pipe, the tail end of the feeding tool is connected with the head end of the washpipe, the tail end of the washpipe is connected with the head end of the inserted central pipe, and the inserted central pipe can be inserted into the head end of the filling tool to achieve the purpose of connecting the inserted central pipe and the filling tool.

2. The one-trip multilayer-packed sand control and layered injection-production integrated pipe column according to claim 1, characterized in that: the top isolation assembly comprises a top isolation pipe column, a suspension packer, a top sealing barrel, a filling sliding sleeve, a positioning joint and a quick-connection tool, wherein the suspension packer is installed at the head end of the top isolation pipe column, the top sealing barrel is installed on the inner wall of the middle part of the top isolation pipe column, the top sealing barrel is located below the top sealing barrel, an overflowing through hole is formed in the side wall of the top isolation pipe column, the filling sliding sleeve is arranged on the inner wall of the top isolation pipe column in a sliding mode to achieve the purpose of opening/closing the overflowing through hole in a sliding mode, the positioning joint is arranged on the inner wall of the top isolation pipe column below the filling sliding sleeve, and the quick-connection tool is arranged on the inner wall of the tail end of the top isolation pipe column.

3. The one-trip multilayer-packed sand control and layered injection-production integrated pipe column according to claim 2, characterized in that: the bypass overflowing screen pipe assembly comprises a blind pipe, a bypass screen pipe and a bypass sliding sleeve, the head end of the blind pipe is connected with the tail end of the top isolating pipe column, the tail end of the blind pipe is connected with the head end of the bypass screen pipe, the head end and the tail end of the bypass sliding sleeve are both installed in the middle and the bottom of the bypass screen pipe in a sealing mode of internal screw threads and external pistons, and a sliding sleeve bushing is arranged below the tail end of the bypass sliding sleeve.

4. The one-trip multilayer-packed sand control and layered injection-production integrated pipe column according to claim 3, characterized in that: the isolation packer assembly comprises an isolation packer pipe column, an isolation packer and an isolation sealing barrel, wherein the head end of the isolation packer pipe column is connected with the tail end of the bypass sieve pipe, the isolation packer is installed on the inner wall of the upper part of the isolation packer pipe column, and the isolation sealing barrel is installed on the inner wall of the lower part of the isolation packer pipe column.

5. The one-trip multilayer-packed sand control and layered injection-production integrated pipe column according to claim 3, characterized in that: the bottom isolation assembly comprises a bottom isolation pipe column, a sand setting packer, an elastic claw suspension mechanism and an inserted anchoring seal and sealing barrel, wherein the bottom isolation pipe column is connected with the tail end of a bypass sieve pipe positioned above the bottom isolation assembly, the sand setting packer is installed on the inner wall of the head end of the bottom isolation pipe column, the inserted anchoring seal is installed in the bottom isolation pipe column, the elastic claw suspension mechanism is installed in the inserted anchoring seal, the sealing barrel is installed below the inserted anchoring seal in the bottom isolation pipe column, and a filling hole and a reverse circulation hole are sealed between the inserted anchoring seal and the sealing barrel by inserting the anchoring seal and the sealing barrel.

6. The one-trip multilayer-packed sand control and layered injection-production integrated pipe column according to claim 1, characterized in that: the feeding tool comprises a setting tool, a releasing tool, a rotary joint and a sealing short section, the tail end of the setting tool is connected with the head end of the releasing tool, the tail end of the releasing tool is connected with the head end of the rotary joint, the tail end outer wall of the rotary joint is provided with the sealing short section, and the rotary joint is hung on an upper end boss in a threaded connection mode through a threaded sleeve and a lower end boss so as to realize the axial free rotation of the rotary joint.

7. The one-trip multilayer-packed sand control and layered injection-production integrated pipe column according to claim 1, characterized in that: the filling tool comprises a tie-back tool, a filling short section, a filling sliding sleeve closing tool, a short section with a hole, a one-way valve, a mechanical positioning tool, a filling sliding sleeve opening tool, a bypass sliding sleeve closing tool and a bypass sliding sleeve opening tool, the middle lower part of the inserted central pipe can be inserted into the head end of the tie-back tool, the tail end of the tie-back tool is connected with the head end of the filling short section, the lateral wall of the filling short section is provided with a filling hole which runs through the lateral wall of the filling short section, the tail end of the filling short section is connected with a filling sliding sleeve closing tool, a porous short section, a check valve, a mechanical positioning tool, a filling sliding sleeve opening tool, a bypass sliding sleeve closing tool and a bypass sliding sleeve opening tool in sequence from top to bottom, and the porous short section is evenly provided with a reverse circulation hole which runs through the porous short section.

8. The one-trip multilayer-packed sand control and layered injection-production integrated pipe column according to claim 7, characterized in that: the head end of the filling tool adopts a structure of piston sealing and an elastic clamp spring or a lock ring so as to realize the purpose that the filling tool is connected with an inserted central pipe in series after being butted into a whole when a wellhead is connected, and the filling short section is respectively provided with two central pipe filling flow channels and a lateral bypass crescent circulation flow channel.

9. The use method of the multilayer filling sand control and layered injection-production integrated pipe column is characterized in that: the method comprises the following steps:

step 1, a sand setting packer is lowered by using a drill rod or a cable;

step 2, sequentially inserting the external pipe columns into the well mouth, wherein the external pipe columns are inserted with the anchoring seal, the bypass overflowing sieve pipe assembly, the isolation packer assembly and the top layer bypass overflowing sieve pipe assembly, and performing pressure test step by step;

step 3, sequentially lowering an inserted central tube, a flushing tube and a feeding tool at the wellhead, butting the inserted central tube with a filling tool inserted into the anchoring seal, radially opening an elastic clamp spring or a lock ring at the head end of the filling tool, then clenching the inserted central tube and sealing the inserted central tube for pressure test, lifting and pressing the elastic claw suspension mechanism inserted into the upper end of the anchoring seal, moving the internal clamp spring up to a concave table for locking, separating the filling tool from the inserted anchoring seal to meet the subsequent operation requirement of moving a tubular column due to the fact that the elastic claw is not radially constrained after moving up, then lowering the filling hole out to a sealing cylinder at the lowest end and connecting the feeding tool with a top packer assembly, and establishing positive circulation and reverse circulation in real time in the lowering process due to the fact that the filling hole is positioned below the external tubular column;

step 4, the integral pipe column is lowered to a designed position, so that the inserted anchoring is inserted into the sand setting packer, the piston sealing can be realized after the sand setting packer is inserted due to the sealing barrel inside, then the top packer is directly pressurized and set in the pipe, and the feeding tool of the inner pipe column is separated from the top packer of the outer pipe column by forward rotation after the sealing is qualified;

step 5, moving the inner pipe column, and enabling the sealing short section of the feeding tool to enter a top sealing barrel of the top packer assembly to realize sealing, wherein all isolation packers can be pressurized and set in the pipe due to the fact that the shaft below the sealing short section is completely sealed;

step 6, moving the inner pipe column, enabling the bypass sliding sleeve opening tool to pass through the bypass sliding sleeve of which the closing tool does not pass through the operation layer, and enabling the filling sliding sleeve opening and closing tool to pass through the filling sliding sleeve, wherein the sliding sleeve can be identified in a one-to-one manner with the opening and closing tool, so that the target sliding sleeve can be accurately opened;

step 7, moving the inner pipe column to enable a mechanical positioning tool of the filling tool to be positioned with a positioning joint of the bottom isolation packer assembly, pumping mortar into the pipe through a drill pipe, a feeding tool, a washing pipe, a filling hole and a filling sliding sleeve to a stratum due to the fact that the relative position of the filling tool and the outer pipe column is set, and enabling sand-carrying liquid during circulating filling to pass through a circulating flow channel to reach the annulus of the shaft after sand filtration of a screen pipe and through the bottom of the filling tool and the filling tool by-pass;

step 8, after filling is finished, moving the inner pipe column to enable the filling hole and the nipple with the hole to simultaneously enter an upper sealing cylinder and a lower sealing cylinder of the filling sliding sleeve, cleaning redundant mortar in the drill rod through annular liquid injection reverse circulation, and enabling the redundant mortar to pass through an upper shaft annular space and a filling tool bypass flow passage, the filling hole, a flushing pipe, a feeding tool and the drill rod to reach a wellhead;

step 9, moving the inner pipe column, enabling the bypass sliding sleeve closing tool to pass through the bypass sliding sleeve at the operation layer, and enabling the filling sliding sleeve closing tool to pass through the filling sliding sleeve, wherein the sliding sleeve can be identified in a one-to-one manner with an opening and closing tool of the sliding sleeve, so that the target sliding sleeve can be accurately closed;

step 10, moving the inner pipe column to the upper layer, repeating the steps 6-10 until the filling operation is finished, and taking out the inner pipe column;

and 11, subsequently, according to production requirements, putting an oil pipe switch tool to selectively switch the bypass sliding sleeves at different layers, so as to meet the operation requirements of layered injection and production.

Background

In the field of oil field well completion industry, in order to solve the problems that the conventional layered packing sand control pipe column is insufficient in fracturing construction discharge capacity, the length of a construction well section is limited, and the applicable bottleneck that a separate-production separate-injection pipe column cannot be put into a small well, the design of a pipe column and key tools needs to be innovated, the operation requirement of integrating large-discharge fracturing, circulating packing sand control and separate-production injection production is realized, and meanwhile, the operation efficiency is improved.

At present, the domestic separate-layer filling sand-prevention pipe column generally adopts a two-layer internal pipe column structure, is limited by larger interlayer friction resistance, is difficult to meet the operation requirements of sub-divided layer fracturing filling and slim-hole separate-layer filling and separate-layer injection allocation, and has complex field operation and high operation risk.

Disclosure of Invention

The invention overcomes the defects in the prior art, the prior layered filling sand control pipe column adopts a two-layer internal pipe column structure, the interlayer friction is larger, the operation requirement is difficult to meet, and the operation risk is high, and provides the one-trip multilayer filling sand control and layered injection and production integrated pipe column and the use method thereof.

The purpose of the invention is realized by the following technical scheme.

The integrated pipe column for the multilayer filling sand control and the layered injection and production comprises an external pipe column and an internal pipe column, wherein the internal pipe column is positioned in the external pipe column;

the external pipe column comprises a top isolation assembly, a bypass overflowing screen pipe assembly, an isolation packer assembly and a bottom isolation assembly, wherein the top isolation assembly, the bypass overflowing screen pipe assembly, the isolation packer assembly, the bypass overflowing screen pipe assembly and the bottom isolation assembly are sequentially connected from top to bottom, the top isolation assembly and the bottom isolation assembly are respectively connected with the bypass overflowing screen pipe assembly, the head end and the tail end of the isolation packer assembly are respectively connected with the bypass overflowing screen pipe assembly, the number of the bypass overflowing screen pipe assembly and the isolation packer assembly is matched with the number of layers required by operation, and the number of the bypass overflowing screen pipe assembly is +1 of the number of the isolation packer assemblies;

the inner pipe column comprises a feeding tool, a washpipe, an inserted central pipe and a filling tool, wherein the head end of the feeding tool is connected with a drill rod or an oil pipe, the tail end of the feeding tool is connected with the head end of the washpipe, the tail end of the washpipe is connected with the head end of the inserted central pipe, and the inserted central pipe can be inserted into the head end of the filling tool to achieve the purpose of connecting the inserted central pipe and the filling tool.

The top isolation assembly comprises a top isolation pipe column, a suspension packer, a top sealing barrel, a filling sliding sleeve, a positioning joint and a quick-connection tool, wherein the suspension packer is installed at the head end of the top isolation pipe column, the top sealing barrel is installed on the inner wall of the middle part of the top isolation pipe column, the top sealing barrel is located below the top sealing barrel, an overflowing through hole is formed in the side wall of the top isolation pipe column, the filling sliding sleeve is arranged on the inner wall of the top isolation pipe column in a sliding mode to achieve the purpose of opening/closing the overflowing through hole in a sliding mode, the positioning joint is arranged on the inner wall of the top isolation pipe column below the filling sliding sleeve, and the quick-connection tool is arranged on the inner wall of the tail end of the top isolation pipe column.

The bypass overflowing screen pipe assembly comprises a blind pipe, a bypass screen pipe and a bypass sliding sleeve, the head end of the blind pipe is connected with the tail end of the top isolating pipe column, the tail end of the blind pipe is connected with the head end of the bypass screen pipe, the head end and the tail end of the bypass sliding sleeve are both installed in the middle and the bottom of the bypass screen pipe in a sealing mode of internal screw threads and external pistons, and a sliding sleeve bushing is arranged below the tail end of the bypass sliding sleeve.

The isolation packer assembly comprises an isolation packer pipe column, an isolation packer and an isolation sealing barrel, wherein the head end of the isolation packer pipe column is connected with the tail end of the bypass sieve pipe, the isolation packer is installed on the inner wall of the upper part of the isolation packer pipe column, and the isolation sealing barrel is installed on the inner wall of the lower part of the isolation packer pipe column.

The bottom isolation assembly comprises a bottom isolation pipe column, a sand setting packer, an elastic claw suspension mechanism and an inserted anchoring seal and sealing barrel, wherein the bottom isolation pipe column is connected with the tail end of a bypass sieve pipe positioned above the bottom isolation assembly, the sand setting packer is installed on the inner wall of the head end of the bottom isolation pipe column, the inserted anchoring seal is installed in the bottom isolation pipe column, the elastic claw suspension mechanism is installed in the inserted anchoring seal, the sealing barrel is installed below the inserted anchoring seal in the bottom isolation pipe column, and a filling hole and a reverse circulation hole are sealed between the inserted anchoring seal and the sealing barrel by inserting the anchoring seal and the sealing barrel.

The feeding tool comprises a setting tool, a releasing tool, a rotary joint and a sealing short section, the tail end of the setting tool is connected with the head end of the releasing tool, the tail end of the releasing tool is connected with the head end of the rotary joint, the tail end outer wall of the rotary joint is provided with the sealing short section, and the rotary joint is hung on an upper end boss in a threaded connection mode through a threaded sleeve and a lower end boss so as to realize the axial free rotation of the rotary joint.

The filling tool comprises a tie-back tool, a filling short section, a filling sliding sleeve closing tool, a short section with a hole, a one-way valve, a mechanical positioning tool, a filling sliding sleeve opening tool, a bypass sliding sleeve closing tool and a bypass sliding sleeve opening tool, the middle lower part of the inserted central pipe can be inserted into the head end of the tie-back tool, the tail end of the tie-back tool is connected with the head end of the filling short section, the lateral wall of the filling short section is provided with a filling hole which runs through the lateral wall of the filling short section, the tail end of the filling short section is connected with a filling sliding sleeve closing tool, a porous short section, a check valve, a mechanical positioning tool, a filling sliding sleeve opening tool, a bypass sliding sleeve closing tool and a bypass sliding sleeve opening tool in sequence from top to bottom, and the porous short section is evenly provided with a reverse circulation hole which runs through the porous short section.

The head end of the filling tool adopts a structure of piston sealing and an elastic clamp spring or a lock ring so as to realize the purpose that the filling tool is connected with an inserted central pipe in series after being butted into a whole when a wellhead is connected, and the filling short section is respectively provided with two central pipe filling flow channels and a lateral bypass crescent circulation flow channel.

The use method of the multilayer filling sand control and layered injection-production integrated pipe column comprises the following steps:

step 1, a sand setting packer is lowered by using a drill rod or a cable;

step 2, sequentially inserting the external pipe columns into the well mouth, wherein the external pipe columns are inserted with the anchoring seal, the bypass overflowing sieve pipe assembly, the isolation packer assembly and the top layer bypass overflowing sieve pipe assembly, and performing pressure test step by step;

step 3, sequentially lowering an inserted central tube, a flushing tube and a feeding tool at the wellhead, butting the inserted central tube with a filling tool inserted into the anchoring seal, radially opening an elastic clamp spring or a lock ring at the head end of the filling tool, then clenching the inserted central tube and sealing the inserted central tube for pressure test, lifting and pressing the elastic claw suspension mechanism inserted into the upper end of the anchoring seal, moving the internal clamp spring up to a concave table for locking, separating the filling tool from the inserted anchoring seal to meet the subsequent operation requirement of moving a tubular column due to the fact that the elastic claw is not radially constrained after moving up, then lowering the filling hole out to a sealing cylinder at the lowest end and connecting the feeding tool with a top packer assembly, and establishing positive circulation and reverse circulation in real time in the lowering process due to the fact that the filling hole is positioned below the external tubular column;

step 4, the integral pipe column is lowered to a designed position, so that the inserted anchoring is inserted into the sand setting packer, the piston sealing can be realized after the sand setting packer is inserted due to the sealing barrel inside, then the top packer is directly pressurized and set in the pipe, and the feeding tool of the inner pipe column is separated from the top packer of the outer pipe column by forward rotation after the sealing is qualified;

step 5, moving the inner pipe column, and enabling the sealing short section of the feeding tool to enter a top sealing barrel of the top packer assembly to realize sealing, wherein all isolation packers can be pressurized and set in the pipe due to the fact that the shaft below the sealing short section is completely sealed;

step 6, moving the inner pipe column, enabling the bypass sliding sleeve opening tool to pass through the bypass sliding sleeve of which the closing tool does not pass through the operation layer, and enabling the filling sliding sleeve opening and closing tool to pass through the filling sliding sleeve, wherein the sliding sleeve can be identified in a one-to-one manner with the opening and closing tool, so that the target sliding sleeve can be accurately opened;

step 7, moving the inner pipe column to enable a mechanical positioning tool of the filling tool to be positioned with a positioning joint of the bottom isolation packer assembly, pumping mortar into the pipe through a drill pipe, a feeding tool, a washing pipe, a filling hole and a filling sliding sleeve to a stratum due to the fact that the relative position of the filling tool and the outer pipe column is set, and enabling sand-carrying liquid during circulating filling to pass through a circulating flow channel to reach the annulus of the shaft after sand filtration of a screen pipe and through the bottom of the filling tool and the filling tool by-pass;

step 8, after filling is finished, moving the inner pipe column to enable the filling hole and the nipple with the hole to simultaneously enter an upper sealing cylinder and a lower sealing cylinder of the filling sliding sleeve, cleaning redundant mortar in the drill rod through annular liquid injection reverse circulation, and enabling the redundant mortar to pass through an upper shaft annular space and a filling tool bypass flow passage, the filling hole, a flushing pipe, a feeding tool and the drill rod to reach a wellhead;

step 9, moving the inner pipe column, enabling the bypass sliding sleeve closing tool to pass through the bypass sliding sleeve at the operation layer, and enabling the filling sliding sleeve closing tool to pass through the filling sliding sleeve, wherein the sliding sleeve can be identified in a one-to-one manner with an opening and closing tool of the sliding sleeve, so that the target sliding sleeve can be accurately closed;

step 10, moving the inner pipe column to the upper layer, repeating the steps 6-10 until the filling operation is finished, and taking out the inner pipe column;

and 11, subsequently, according to production requirements, putting an oil pipe switch tool to selectively switch the bypass sliding sleeves at different layers, so as to meet the operation requirements of layered injection and production.

The invention has the beneficial effects that: the integrated pipe column has the advantages that the inner pipe column is only provided with one layer of flushing pipe, the drift diameter is large, the friction resistance is low, the operation requirements of large-displacement fracturing filling and small-well long well section layered circulating filling are met, meanwhile, the outer pipe column is provided with the bypass sliding sleeve, selective switching of the bypass sliding sleeves at different layers can be realized through an oil pipe switching tool in the later period, the operation requirements of layered mining are met, a separate injection pipe column for central separate production does not need to be put in, the construction flow is simplified, the operation efficiency is improved, and the operation cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the outer tubing string of the present invention;

FIG. 2 is a schematic view of the inner tubular string of the present invention;

FIG. 3 is a schematic view showing the structure of the filling slide bushing, the bypass slide bushing and the opening/closing tool thereof according to the present invention;

FIG. 4 is a schematic view of the bottom isolation assembly of the present invention in a wellhead run-in condition;

FIG. 5 is a schematic view of a underfill passage of the present invention;

FIG. 6 is a schematic view of the bottom reverse circulation path of the present invention;

in the figure: 1 is a hanging packer; 2 is a top sealing cylinder; 3, filling the sliding sleeve; 4 is a positioning joint; 5 is a quick-connection tool; 6 is a blind pipe; 7 is a bypass sieve tube; 8 is a bypass sliding sleeve; 9 is a sliding bush bushing; 10 is an isolation packer; 11 is an isolation sealing cylinder; 12 is a sand setting packer; 13 is an elastic claw suspension mechanism; 14 for insertion of the anchoring seal; 15 is a sealing cylinder; 16 is a setting tool; 17 is a hand-off tool; 18 is a rotary joint; 19 is a sealing short section; 20 is a washing pipe; 21 is inserted into the central tube; 22 is a tie-back tool; 23 is a filling short section; 23-1 is a filling hole; 24 is a filling sliding sleeve closing tool; 25 is a nipple with a hole; 25-1 is a reverse circulation hole; 26 is a check valve; 27 is a mechanical positioning tool; 28 is a filling sliding sleeve opening tool; 29 is a bypass sliding sleeve closing tool; 30 is a bypass sliding sleeve opening tool; 31 is a top isolation pipe column; 32 is an isolation packing string; and 33 is a bottom isolation pipe column.

For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.

Detailed Description

The technical solution of the present invention is further illustrated by the following specific examples.

Example one

The multi-layer filling sand prevention and layered injection and production integrated pipe column comprises an external pipe column and an internal pipe column, wherein the internal pipe column is positioned in the external pipe column;

the external pipe column comprises a top isolation assembly, a bypass overflowing sieve pipe assembly, an isolation packer assembly and a bottom isolation assembly, wherein the top isolation assembly, the bypass overflowing sieve pipe assembly, the isolation packer assembly, the bypass overflowing sieve pipe assembly and the bottom isolation assembly are sequentially connected from top to bottom, the top isolation assembly and the bottom isolation assembly are respectively connected with the bypass overflowing sieve pipe assembly, the head end and the tail end of the isolation packer assembly are respectively connected with the bypass overflowing sieve pipe assembly, the number of the bypass overflowing sieve pipe assembly and the number of the isolation packer assembly are matched with the number of layers required by operation, and the number of the bypass overflowing sieve pipe assembly is +1 of the number of the isolation packer assemblies;

the inside tubular column includes sending tool, wash pipe 20, inserts center tube 21 and fills the instrument, and the head end of sending tool links to each other with drilling rod or oil pipe, and the tail end of sending tool links to each other with the head end of wash pipe, and the tail end of wash pipe links to each other with the head end of inserting the center tube, inserts in the center tube can insert the head end of filling the instrument to the realization will insert the center tube and fill the purpose that the instrument is connected.

Example two

On the basis of embodiment one, the top is kept apart the assembly and is included top isolation tubular column 31, hang packer 1, top sealing barrel 2, fill sliding sleeve 3, positioning joint 4 and quick-connecting tool 5, hang packer 1 and install the head end at top isolation tubular column 31, top sealing barrel 2 is installed on the middle part inner wall of top isolation tubular column 31, the through-hole that overflows has been seted up on the lateral wall of top isolation tubular column 31 that lies in top sealing barrel 2 below, it slides and sets up on the inner wall of top isolation tubular column 31 to fill sliding sleeve 3, in order to realize the purpose that slides and open/close the through-hole that overflows, set up positioning joint 4 on the inner wall of top isolation tubular column 31 that fills sliding sleeve 2 below, quick-connecting tool 5 sets up on the tail end inner wall of top isolation tubular column 31.

The filling sliding sleeve 3 adopts a continuous wave structure with different groove width lengths so as to realize the opening and closing actions after the one-to-one sliding sleeve opening and closing tool is identified.

The bypass overflowing screen pipe assembly comprises a blind pipe 6, a bypass screen pipe 7 and a bypass sliding sleeve 8, the head end of the blind pipe 6 is connected with the tail end of the top isolating pipe column 31, the tail end of the blind pipe 6 is connected with the head end of the bypass screen pipe 7, the head end and the tail end of the bypass sliding sleeve 8 are both installed in the middle and the bottom of the bypass screen pipe 7 in a sealing mode of internal screw threads and external pistons, and a sliding sleeve bushing 9 is arranged below the tail end of the bypass sliding sleeve 8.

The bypass sliding sleeve 8 adopts a continuous wave structure with the groove width and the length different from those of the filling sliding sleeve 3 so as to realize the switching action after the one-to-one sliding sleeve switching tool is identified and the switching action different from that after the sliding sleeve switching tool is identified.

The isolation packer assembly comprises an isolation packer string 32, an isolation packer 10 and an isolation sealing barrel 11, wherein the head end of the isolation packer string 32 is connected with the tail end of the bypass sieve tube 7, the isolation packer 10 is installed on the inner wall of the upper part of the isolation packer string 32, and the isolation sealing barrel 11 is installed on the inner wall of the lower part of the isolation packer string 32.

The bottom isolation assembly comprises a bottom isolation pipe column 33, a sand setting packer 12, an elastic claw suspension mechanism 13, an inserted anchoring seal 14 and a sealing cylinder 15, wherein the bottom isolation pipe column 33 is connected with the tail end of a bypass screen pipe 7 positioned above the bottom isolation assembly, the sand setting packer 12 is installed on the inner wall of the head end of the bottom isolation pipe column 33, the inserted anchoring seal 14 is installed in the bottom isolation pipe column 33, the elastic claw suspension mechanism 13 is installed in the inserted anchoring seal 14, the sealing cylinder 15 is installed in the bottom isolation pipe column 33 below the inserted anchoring seal 14, and a filling hole and a reverse circulation hole are sealed between the inserted anchoring seal 14 and the sealing cylinder 15 by inserting the anchoring seal 14 and the sealing cylinder 15.

EXAMPLE III

On the basis of the second embodiment, the feeding tool comprises a setting tool 16, a releasing tool 17, a rotary joint 18 and a sealing short section 19, the tail end of the setting tool 16 is connected with the head end of the releasing tool 17, the tail end of the releasing tool 17 is connected with the head end of the rotary joint 18, the sealing short section 19 is installed on the outer wall of the tail end of the rotary joint 18, and the rotary joint 18 is hung on an upper end boss in a threaded connection mode of a threaded sleeve and a lower end boss so as to achieve axial free rotation of the rotary joint.

The filling tool comprises a tie-back tool 22, a filling short section 23, a filling sliding sleeve closing tool 24, a short section with a hole 25, a check valve 26, a mechanical positioning tool 27, a filling sliding sleeve opening tool 28, a bypass sliding sleeve closing tool 29 and a bypass sliding sleeve opening tool 30, the middle lower part of the inserted central tube 21 can be inserted into the head end of the tie-back tool 22, the tail end of the tie-back tool 22 is connected with the head end of the filling short section 23, the side wall of the filling short section 23 is provided with a filling hole 23-1 penetrating through the side wall of the filling short section 23, the tail end of the filling short section 23 is connected with a filling sliding sleeve closing tool 24, a short section 25 with a hole, a one-way valve 26, a mechanical positioning tool 27, a filling sliding sleeve opening tool 28, a bypass sliding sleeve closing tool 29 and a bypass sliding sleeve opening tool 30 from top to bottom in sequence, the perforated short section 25 is uniformly provided with reverse circulation holes 25-1 which penetrate through the perforated short section 25.

The head end of the filling tool adopts a structure of piston sealing and an elastic clamp spring or a lock ring so as to realize the purpose that the filling tool is connected with the inserted central tube 21 in a butt joint mode and then connected in series into a whole, and the filling short section is respectively provided with a filling flow channel and a lateral bypass crescent circulation flow channel in two central tubes.

Example four

The use method of the multilayer filling sand control and layered injection-production integrated pipe column comprises the following steps:

step 1, a sand setting packer is lowered by using a drill rod or a cable;

step 2, sequentially inserting the external pipe columns into the well mouth, wherein the external pipe columns are inserted with the anchoring seal, the bypass overflowing sieve pipe assembly, the isolation packer assembly and the top layer bypass overflowing sieve pipe assembly, and performing pressure test step by step;

step 3, sequentially lowering an inserted central tube, a flushing tube and a feeding tool at the wellhead, butting the inserted central tube with a filling tool inserted into the anchoring seal, radially opening an elastic clamp spring or a lock ring at the head end of the filling tool, then clenching the inserted central tube and sealing the inserted central tube for pressure test, lifting and pressing the elastic claw suspension mechanism inserted into the upper end of the anchoring seal, moving the internal clamp spring up to a concave table for locking, separating the filling tool from the inserted anchoring seal to meet the subsequent operation requirement of moving a tubular column due to the fact that the elastic claw is not radially constrained after moving up, then lowering the filling hole out to a sealing cylinder at the lowest end and connecting the feeding tool with a top packer assembly, and establishing positive circulation and reverse circulation in real time in the lowering process due to the fact that the filling hole is positioned below the external tubular column;

step 4, the integral pipe column is lowered to a designed position, so that the inserted anchoring is inserted into the sand setting packer, the piston sealing can be realized after the sand setting packer is inserted due to the sealing barrel inside, then the top packer is directly pressurized and set in the pipe, and the feeding tool of the inner pipe column is separated from the top packer of the outer pipe column by forward rotation after the sealing is qualified;

step 5, moving the inner pipe column, and enabling the sealing short section of the feeding tool to enter a top sealing barrel of the top packer assembly to realize sealing, wherein all isolation packers can be pressurized and set in the pipe due to the fact that the shaft below the sealing short section is completely sealed;

step 6, moving the inner pipe column, enabling the bypass sliding sleeve opening tool to pass through the bypass sliding sleeve of which the closing tool does not pass through the operation layer, and enabling the filling sliding sleeve opening and closing tool to pass through the filling sliding sleeve, wherein the sliding sleeve can be identified in a one-to-one manner with the opening and closing tool, so that the target sliding sleeve can be accurately opened;

step 7, moving the inner pipe column to enable a mechanical positioning tool of the filling tool to be positioned with a positioning joint of the bottom isolation packer assembly, pumping mortar into the pipe through a drill pipe, a feeding tool, a washing pipe, a filling hole and a filling sliding sleeve to a stratum due to the fact that the relative position of the filling tool and the outer pipe column is set, and enabling sand-carrying liquid during circulating filling to pass through a circulating flow channel to reach the annulus of the shaft after sand filtration of a screen pipe and through the bottom of the filling tool and the filling tool by-pass;

step 8, after filling is finished, moving the inner pipe column to enable the filling hole and the nipple with the hole to simultaneously enter an upper sealing cylinder and a lower sealing cylinder of the filling sliding sleeve, cleaning redundant mortar in the drill rod through annular liquid injection reverse circulation, and enabling the redundant mortar to pass through an upper shaft annular space and a filling tool bypass flow passage, the filling hole, a flushing pipe, a feeding tool and the drill rod to reach a wellhead;

step 9, moving the inner pipe column, enabling the bypass sliding sleeve closing tool to pass through the bypass sliding sleeve at the operation layer, and enabling the filling sliding sleeve closing tool to pass through the filling sliding sleeve, wherein the sliding sleeve can be identified in a one-to-one manner with an opening and closing tool of the sliding sleeve, so that the target sliding sleeve can be accurately closed;

step 10, moving the inner pipe column to the upper layer, repeating the steps 6-10 until the filling operation is finished, and taking out the inner pipe column;

and 11, subsequently, according to production requirements, putting an oil pipe switch tool to selectively switch the bypass sliding sleeves at different layers, so as to meet the operation requirements of layered injection and production.

Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.