1. The anti-freezing method for the rotary guide down-transmission code sending pipeline is characterized by comprising the following steps of: the method is realized by adjusting the opening form of a bypass pipeline of the code sending device;

the code sending device comprises a mud pool, a mud pump connected with the mud pool and a drilling device connected with the mud pump, the bypass pipeline is arranged on a pipeline between the mud pump and the drilling device, and a valve is arranged on the bypass pipeline;

the method comprises the following steps:

the valve is continuously opened with a small opening degree, so that the bypass pipeline continuously returns mud to the mud tank.

2. The anti-freezing method for the rotary steering code transmitting pipeline as claimed in claim 1, wherein the anti-freezing method comprises the following steps: the method further comprises the following steps: the valve is opened intermittently with a large opening degree periodically, and the opening period is less than the minimum period which can be identified by the drilling device.

3. The method for preventing freezing of a rotary steerable code transmitting pipeline according to any one of claims 1 or 2, wherein: the opening form of the valve is regulated and controlled by an adjusting mechanism, and the adjusting mechanism is controlled by a controller to operate.

Background

In the process of petroleum well drilling, the rotary guide device is required to be commanded and adjusted according to on-site while-drilling data to hit a target point, and the command issuing is required to pass through a downloading code sending device. The down-transmission code-sending device is a valve generally, and plays a role of bypass, namely, mud of the main pipeline is discharged, the rotating speed of the underground generator is influenced by reducing the pressure and flow of the main pipeline in a proper amount, and the underground processor can analyze the rotating speed of the generator and extract well-digging information integrated on the rotating speed of the generator, so that the aim of transmitting data to the underground from the ground is fulfilled.

At present, a large pump and a pipeline thereof work in an open-air environment, and transmission does not need to be frequently carried out due to information, namely, under the condition of northern cold weather, a valve and the pipeline at an outlet of the valve are frozen, so that slurry cannot be discharged, data cannot be downloaded, the optimal adjustment period is likely to be missed, the well drilling operation is influenced, and economic loss is caused.

Disclosure of Invention

In order to solve the above problems, i.e. the problems of the prior art, the present invention provides a method for preventing freezing of a rotary guide down-transmission code-sending pipeline, wherein the method is implemented by adjusting the opening form of a bypass pipeline of a code-sending device;

the code sending device comprises a mud pool, a mud pump connected with the mud pool and a drilling device connected with the mud pump, the bypass pipeline is arranged on a pipeline between the mud pump and the drilling device, and a valve is arranged on the bypass pipeline;

the method comprises the following steps:

the valve is continuously opened with a small opening degree, so that the bypass pipeline continuously returns mud to the mud tank.

The invention is further provided with: the method further comprises the following steps: the valve is opened intermittently with a large opening degree periodically, and the opening period is less than the minimum period which can be identified by the drilling device.

The invention is further provided with: the valve is regulated and controlled to be opened through an adjusting mechanism, and the adjusting mechanism is controlled to operate through a controller.

The beneficial technical effects of the invention are as follows: the bypass pipeline continuously returns the slurry to the slurry tank by adopting a mode of continuously opening the valve with a small opening degree, and the slurry has a certain temperature, so that the bypass pipeline can be prevented from being frozen; the mode of periodically and intermittently opening the valve is adopted, the valve is opened with a large opening degree before the pipeline is frozen, so that slurry flows back into the slurry tank, the opening and closing period of the valve is smaller than the minimum period of the change of the rotating speed of the generator which can be identified by the processor, and therefore, signals after the generator is influenced by the opening and closing of the valve are not matched with the downloading coding rule, the signals can be ignored by the underground device, the downloading disorder can not be caused, and the bypass pipeline is periodically washed by the slurry, so that the freezing of the bypass pipeline can be prevented.

Drawings

Fig. 1 shows a block diagram of the system of the present invention.

Fig. 2 shows a schematic structural diagram of the present invention.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Example 1:

referring to fig. 1-2, the present invention provides a method for preventing freezing of a rotary steering downstream code transmitting pipeline, which is implemented by adjusting the opening mode of a bypass pipeline of a code transmitting device;

the code sending device comprises a mud pool, a mud pump connected with the mud pool and a drilling device connected with the mud pump, a bypass pipeline is arranged on a pipeline between the mud pump and the drilling device, and a valve is arranged on the bypass pipeline;

the drilling device comprises drilling components such as a drill bit and a drill rod, wherein the drill bit is driven by a generator arranged near the drill bit, mud is discharged through the drill bit and then returns to a mud pit through an annulus (hereinafter referred to as the annulus) between the drill rod and a borehole, and the generator is washed in the returning process to drive an impeller to rotate to generate power so that the drill bit rotates;

the bypass pipeline is used for enabling the mud part conveyed to the drilling device by the mud pump to flow back to the mud pool, after the bypass pipeline is opened, the rotating speed of a generator in the drilling device is influenced, and the underground processor analyzes the rotating speed of the generator and extracts well drilling information integrated on the rotating speed of the generator, so that the aim of transmitting data to the underground from the ground is fulfilled;

the method comprises the following steps:

the valve is continuously opened with a small opening degree, so that the bypass pipeline continuously returns mud to the mud tank.

The method aims at that a valve on a bypass pipeline is an adjusting valve and is continuously opened at a small opening degree, so that the bypass pipeline continuously returns slurry to a slurry tank, the temperature of the slurry returned from the underground annular space is above O ℃, the continuous slurry flow can ensure that the bypass pipeline is not frozen, the pressure loss of a main pipeline caused by the continuous opening of the bypass pipeline has extremely low influence on an underground generator, and meanwhile, a processor cannot recognize the change of the rotating speed of an engine, so that the information transmission and the normal work of the generator are not influenced;

for the preferred scheme, furthermore, the opening form of the valve is regulated and controlled by an adjusting mechanism, and the adjusting mechanism is controlled by a controller to operate;

the controller can be a PLC controller, and the adjusting mechanism is composed of a servo motor, and the servo motor drives a knob on the valve to operate, so as to realize the opening and closing of the valve.

Example 2:

this example differs from example 1 in that: the method comprises the following steps: the valve is opened intermittently with large opening degree periodically, and the opening period is less than the minimum period which can be identified by the drilling device;

the method aims at that a valve on a bypass pipeline is a leakage prevention valve rather than a regulating valve, for a processor used for identifying the rotating speed of a generator underground, the rotating speed of the generator can be analyzed, well drilling information integrated on the rotating speed of the generator is extracted, the processor can identify information transmitted in the generator when the generator carries out specific periodic rotating speed change, the rotating speed change exceeds the period, the processor cannot identify the rotating speed change, the shortest action period identified by the processor also has a plurality of seconds, therefore, the valve is intermittently opened in the minimum period which is smaller than the minimum period identified by a drilling device, mud can periodically flush the bypass pipeline, and the bypass pipeline is prevented from being frozen.

Example 3:

this example differs from examples 1 and 2 in that: the method comprises the steps that the valve is opened continuously with a small opening degree, so that the bypass pipeline continuously returns mud to the mud pit, the valve is opened intermittently with a large opening degree periodically, and the opening period is smaller than the minimum period which can be identified by the drilling device;

the two bypass anti-freezing methods are integrated, and the opening modes of the valve comprise the two opening modes, and the two opening modes can be simultaneously applied to the valve which is a regulating valve.

The working principle is as follows: when the valve is continuously opened at a small opening degree, the bypass pipeline continuously returns mud to the mud tank, the temperature of the mud returning from the underground annular space is above O ℃, the continuous mud flow can ensure that the bypass pipeline is not frozen, the pressure loss of the main pipeline caused by the continuous opening of the bypass pipeline has extremely low influence on the underground generator, and meanwhile, the processor cannot identify the change of the rotating speed of the engine, so that the information transmission and the normal work of the generator cannot be influenced; when the valve is periodically opened according to the opening degree, for a processor used for identifying the rotating speed of the generator underground, the rotating speed of the generator can be analyzed, well-digging information integrated on the rotating speed of the generator is extracted, when the generator carries out specific periodic rotating speed change, the processor can identify information transmitted in the generator, the rotating speed change exceeding the interval of the period cannot be identified by the processor, the shortest action period identified by the processor also has a plurality of seconds, therefore, the valve is intermittently opened according to the minimum period which is smaller than the minimum period identified by the drilling device, mud can periodically flush a bypass pipeline, and the bypass pipeline is prevented from being frozen.

While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.