CN116950606A - Circulation leakage blocking valve and control method - Google Patents

Abstract

The invention discloses a circulating plugging valve and a control method, belonging to the technical field of drilling equipment; wherein, circulation leaking stoppage valve includes: a drive housing, a drain assembly, and a drive assembly. The side wall of the driving shell is provided with a bypass hole communicated with the inside of the driving shell; the drainage component is arranged in the driving shell and comprises a liquid flow part; the liquid flow part is provided with a liquid flow channel communicated with the inside of the driving shell, and the side wall of the liquid flow part is provided with a communication hole; the liquid flow part is provided with a first station and a second station; when the liquid flow part is at the first station, the communication hole and the bypass hole are arranged in a staggered mode, and when the liquid flow part is at the second station, the communication hole and the bypass hole are arranged in an aligned mode; the driving assembly is used for driving the liquid flow part to be switched from the first station to the second station, and then the plugging material entering from the top of the driving shell is discharged through the bypass hole to perform plugging operation. According to the invention, the driving assembly drives the liquid flow part to be automatically switched between the first station and the second station, so that the operation simplicity of the circulating plugging valve is improved.

Description

Circulation leakage blocking valve and control method

Technical Field

The present disclosure relates generally to the field of drilling technology, and more particularly, to a circulating plugging valve and a control method.

Background

Drilling is an essential element of oil exploration and oil development, and all subsequent data collection work is also necessary on drilling. Drilling operation speed and development cost are inversely proportional to each other, and are directly proportional to later output benefits. In order to ensure the working quality of petroleum drilling engineering, the engineering leakage preventing and stopping process is required to be processed, so that the phenomenon of leakage is avoided. The problem of lost circulation is a troublesome problem in the drilling process, a great deal of manpower, financial resources and time are wasted, serious lost circulation can cause well wall collapse, drilling sticking and blowout accidents, even one well is scrapped, and daily large economic loss is caused. Although a plurality of plugging technologies and methods are proposed, the problem of lost circulation in drilling can be effectively solved by the present inventor.

The traditional plugging mode generally requires that the drilling tool is lifted out of the well bore, and then the plugging tool is used for extending into the drilling tool to perform plugging. The conventional plugging tool is used together with the plugging valve catching balls, so that although the construction requirement can be met, the number of the plugging valve catching balls contained in the inner cavity of the plugging tool is necessarily limited due to the limited specification of the plugging tool, and the plugging tool used together with the plugging valve catching balls can only perform plugging work for a limited number of times. Aiming at the situation, in order to avoid using the ball catch of the plugging valve, the prior plugging tool provides a novel plugging valve, for example, chinese patent document with the patent number of CN115354988A discloses a quick plugging valve capable of being opened and closed for multiple times, the patent document can seal the bottom of a valve body without the ball catch of the plugging valve when the plugging operation is realized through the cooperation of a circulating sliding sleeve, a plugging head and a cone core, so that plugging materials cannot block the interior of the plugging tool, but the plugging valve is driven by an elastic component, the elastic component is required to be extruded for multiple times to drive the circulating sliding sleeve to move when the plugging valve is used, the use of the plugging valve is not simple enough, the elastic component is easy to be damaged due to the fact that the elastic component is extruded for multiple times, and the use effect of the plugging valve is influenced.

Disclosure of Invention

In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide a circulation leaking stoppage valve and control method that is easy to operate and excellent in leaking stoppage effect.

In a first aspect, the present invention provides a circulation lost circulation valve comprising:

the side wall of the driving shell is provided with a bypass hole communicated with the inside of the driving shell; a plugging material flow passage is formed in the driving shell;

the drainage assembly is arranged inside the driving shell and comprises a liquid flow part; the liquid flow part is provided with a liquid flow channel communicated with the inside of the driving shell, and the side wall of the liquid flow part is provided with a communication hole;

the liquid flow part is provided with a first station and a second station; when the liquid flow part is at the first station, the communication hole and the bypass hole are arranged in a staggered manner; when the liquid flow part is in the second station, the communication hole is aligned with the bypass hole;

the driving assembly is used for driving the liquid flow part to be switched from the first station to the second station, and then the plugging material entering from the top of the driving shell is discharged through the bypass hole to perform plugging operation.

According to the technical scheme provided by the invention, the liquid flow part comprises:

the sliding sleeve adapter is provided with an opposite adapter end and a connecting end, and the adapter end is connected with the driving assembly;

the sliding sleeve guide rod is connected with the connecting end;

the circulating plugging valve sliding sleeve is sleeved on the sliding sleeve adapter and the sliding sleeve guide rod, and the liquid flow channel is formed between the circulating plugging valve sliding sleeve and the sliding sleeve adapter;

the outer side wall of the circulation leaking stoppage valve sliding sleeve is contacted with the inner wall of the driving shell, and the communication hole is formed in the outer side wall of the circulation leaking stoppage valve sliding sleeve.

According to the technical scheme provided by the invention, the drainage assembly further comprises: a fixed ring seat;

the fixed ring seat is fixedly connected with the inner wall of the driving shell;

the middle part of the fixed ring seat is provided with a connecting hole, and a plurality of water passing holes are also formed in the seat body along the circumferential direction of the connecting hole; the connecting hole is fixedly connected with the driving assembly.

According to the technical scheme provided by the invention, the driving assembly comprises: a driving sleeve and a driving part arranged in the driving sleeve;

the driving sleeve is connected with the connecting hole, the driving sleeve is hollow, and is provided with a limiting protrusion, and the limiting protrusion is used for limiting the moving distance of the driving part;

the driving part is connected with the switching end and is used for driving the sliding sleeve switching joint to move along the extending direction of the driving shell, so that the communication hole on the circulating plugging valve sliding sleeve moves to be aligned with the bypass hole.

According to the technical scheme provided by the invention, the driving part comprises:

the driving seat is fixedly connected with the driving sleeve;

the driving piece is arranged on the driving seat; the driving piece is provided with a driving end;

the screw rod is in transmission connection with the driving end;

the follower is in threaded connection with the lead screw, and the follower is connected with the switching end.

According to the technical scheme provided by the invention, the sliding sleeve adapter is hollow to form a first space; a plurality of side holes are formed in the side wall of the sliding sleeve adapter, and the side holes are communicated with the liquid flow channel;

the inner wall of the sliding sleeve guide rod is in threaded connection with the outer wall of the sliding sleeve adapter, and the inside of the sliding sleeve guide rod is hollow to form a second space;

the first space is communicated with the second space.

According to the technical scheme provided by the invention, a plug and a buffer structure connected with the plug are also arranged in the driving shell;

the plug is positioned at one end of the sliding sleeve guide rod, which is far away from the sliding sleeve adapter; the end of the plug close to the sliding sleeve guide rod is provided with a plug bulge, and the plug bulge is matched with the second space and is used for being abutted against the sliding sleeve guide rod;

the buffer structure is located at one end of the plug, which is far away from the sliding sleeve guide rod.

According to the technical scheme provided by the invention, the driving assembly further comprises: an electric control part;

the electric control part is arranged in the driving sleeve and is positioned at one end of the driving seat far away from the driving piece; the electric control part is electrically connected with the driving part, and is used for supplying power to the driving part and controlling the operation condition of the driving part, and the operation condition at least comprises: start, stop and rotational speed.

According to the technical scheme provided by the invention, the righting component is arranged at one end of the driving sleeve, which is far away from the sliding sleeve adapter; the righting assembly is for balancing the counterweight.

In a second aspect, the invention discloses a control method of a circulation leaking stoppage valve, which is applied to the circulation leaking stoppage valve, and the control method comprises the following steps:

establishing a plurality of groups of rotating speed sequences, wherein each group of rotating speed sequences at least comprises: rotational speed, steering, and run length corresponding to the rotational speed;

dividing a plurality of groups of rotating speed sequences into a first instruction set and a second instruction set according to the steering; the first instruction set is used for controlling the opening of the circulating leakage stoppage valve, and the second instruction set is used for controlling the closing of the circulating leakage stoppage valve;

and respectively controlling the operation of the driving piece by the first instruction set and the second instruction set.

In summary, the technical scheme specifically discloses a circulating plugging valve and a control method. Wherein, circulation leaking stoppage valve includes: a drive housing, a drain assembly, and a drive assembly. The side wall of the driving shell is provided with a bypass hole communicated with the inside of the driving shell, and a plugging material flow passage is formed in the driving shell; the drainage component is arranged in the driving shell; specifically, the drainage component comprises a liquid flow part, the liquid flow part is provided with a liquid flow channel communicated with the inside of the driving shell, and the side wall of the liquid flow part is provided with a communication hole; the liquid flow part is provided with a first station and a second station; when the liquid flow part is at the first station, the communication hole and the bypass hole are arranged in a staggered mode, and the circulating plugging valve is in a closed state; when the liquid flow part is at the second station, the communication hole is aligned with the bypass hole, and the circulating plugging valve is in an open state; the driving assembly is used for driving the liquid flow part to be switched from the first station to the second station, and then the plugging material entering from the top of the driving shell is discharged through the bypass hole, so that plugging operation is carried out on the lost circulation position.

Aiming at the problems that the operation difficulty of the existing plugging valve is high, and the follow-up continuous use of the plugging valve can be influenced by the driving of an elastic component, the circulating plugging valve is provided. According to the circulating plugging valve, the driving assembly drives the liquid flow part to perform position switching between the first station and the second station, so that the relative position relation between the communication hole and the bypass hole is changed, when the driving assembly drives the liquid flow part to move to the second station, plugging materials can pass through the driving shell, the liquid flow channel and the communication hole and finally be discharged to a lost circulation position through the bypass hole, plugging operation is completed, the whole process is easy and convenient to operate, and the alignment accuracy of the communication hole and the bypass hole can be ensured.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

FIG. 1 is a cross-sectional view of a lower structure of a circulation lost circulation valve.

Fig. 2 is a cross-sectional view of a top structure of the circulation plugging valve.

Fig. 3 is a schematic view of the lower structure of the circulation plugging valve.

Fig. 4 is a schematic diagram of the upper structure of the circulation plugging valve.

Fig. 5 is a schematic flow chart of a control method of the circulating plugging valve.

Reference numerals in the drawings: 100. a drive housing; 101. a bypass hole; 102. a positioning pin; 103. a seal ring; 200. a drainage assembly; 201. a communication hole; 202. a sliding sleeve adapter; 2021. a side hole; 203. sliding sleeve guide rod; 204. a circulating plugging valve sliding sleeve; 205. a fixed ring seat; 2051. a water passing hole; 300. a drive assembly; 301. a drive sleeve; 302. a driving seat; 303. a driving member; 304. a screw rod; 305. a follower; 3051. an end fitting; 3052. an outer sleeve of the sliding sleeve; 3053. a transmission rod; 400. a plug; 401. the plug is convex; 500. a righting assembly; 501. a centralizer; 502. caudal vertebrae; 600. a disc spring; 700. and (5) limiting the nut.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

Referring to fig. 1 and 2, a cross-sectional view of a lower part and an upper part of a circulation leakage blocking valve and a schematic view of a lower part and an upper part of a circulation leakage blocking valve shown in fig. 3 and 4 are provided, the circulation leakage blocking valve includes:

the driving housing 100, the sidewall of the driving housing 100 is provided with a bypass hole 101 communicated with the inside; a plugging material flow passage is formed inside the driving housing 100;

a drain assembly 200, the drain assembly 200 being disposed inside the drive housing 100, the drain assembly 200 comprising a liquid flow portion; the liquid flow part is provided with a liquid flow channel communicated with the inside of the driving shell 100, and the side wall of the liquid flow part is provided with a communication hole 201;

the liquid flow part is provided with a first station and a second station; when the liquid flow part is at the first station, the communication hole and the bypass hole are arranged in a staggered manner; when the liquid flow part is at the second station, the communication hole 201 is aligned with the bypass hole 101;

the driving assembly 300, the driving assembly 300 is used for driving the liquid flow part to switch from the first station to the second station, and then the plugging material entering from the top of the driving shell 100 is discharged through the bypass hole 101 for plugging operation.

It should be noted that the application scenario of the circulation leaking stoppage valve disclosed by the invention is a lost circulation situation, in the traditional lost circulation situation, once lost circulation is caused, leaking stoppage operation is needed to be carried out by using leaking stoppage materials (the leaking stoppage materials are in a fluid state), but the leaking stoppage materials are easy to block downhole tools such as a downhole power drilling tool or a measurement while drilling tool, and the like, and the internal structures of the tools are complex, precise and expensive, so that the tools fail once the tools are blocked by the leaking stoppage materials.

Therefore, the conventional plugging tool can be used together with the plugging catching ball, and before plugging materials are input into the plugging tool, the bottom of the plugging tool is sealed by the plugging catching ball, so that the plugging materials are prevented from plugging the internal structure of the plugging tool, and although the setting of the plugging catching ball can meet the construction requirement, the inner cavity of the plugging tool is required to store more plugging catching balls, the whole length is required to be increased, and the transportation is inconvenient; meanwhile, the plugging balls accumulated in the inner cavity can obviously reduce the flow area and even generate the shutoff phenomenon after being switched on and off for a plurality of times.

Based on the above-mentioned problems, the present invention provides a circulation leaking stoppage valve in this embodiment, which specifically includes:

the interior of the driving housing 100 forms the installation space of the drainage assembly 200 and the driving assembly 300, and meanwhile, because the drainage assembly 200 and the driving assembly 300 are not tightly connected with the inner wall of the driving housing 100, the driving housing 100 also serves as a plugging material flow passage, and of course, the driving housing 100 can be obtained by splicing a plurality of housings or splicing a plurality of independent housings with housings carried by other components, and the driving housing is not limited herein, and can be reasonably assembled depending on practical conditions.

Specifically, the side wall is provided with a bypass hole 101 communicated with the inside of the side wall, the bypass hole 101 is used for being aligned with a well leakage position, so that a plugging material can be conveniently conveyed to the well leakage position, the type of the plugging material can be cement, sand stone or a mixed material which takes cement and sand stone as raw materials, and a small amount of additive and high polymer are doped into the plugging material; in addition, the side wall of the driving shell 100 is further provided with a positioning pin 102, the positioning pin 102 can reach the second station at the liquid flow part, the liquid flow part is fixed, the stability of the liquid flow part is enhanced, and the plugging operation efficiency is improved.

The liquid flow part in the drainage assembly 200 is provided with a liquid flow channel communicated with the inside of the driving shell 100, and the side wall of the liquid flow part is provided with a communication hole 201, and based on the liquid flow channel, the flow direction of the plugging material is the driving shell 100-the liquid flow channel-the communication hole 201;

because the liquid flow part is provided with a first station and a second station, the relative positions of the first station and the second station are shown in fig. 1, and the second station is positioned close to the bottom of the circulation leakage blocking valve relative to the first station; when the liquid flow part is at the first station, the communication hole 201 and the bypass hole 101 are arranged in a staggered mode, and if plugging materials cannot enter the bypass hole 101 from the top of the driving shell through the communication hole 201 at the moment, plugging operation cannot be performed, and the state is recorded as a closed state of the circulating plugging valve; when the liquid flow part is at the second station, the communication hole 201 is aligned with the bypass hole 101, so that the flow direction of the plugging material is the position of the driving shell 100, the liquid flow channel, the communication hole 201, the bypass hole 101 and the well leakage, the state is recorded as the open state of the circulating plugging valve, and the plugging operation is finally completed.

In combination with the above, the station state of the liquid flow portion determines the opening or closing of the circulation leaking stoppage valve, and the driving assembly 300 is just a power source for driving the liquid flow portion to switch from the first station to the second station.

Specifically, the liquid flow portion includes:

the sliding sleeve adapter 202, the sliding sleeve adapter 202 has opposite adapting end and connecting end, the adapting end is connected with the driving assembly 300, the driving assembly 300 is used for driving the sliding sleeve adapter 202 to perform linear movement, and here, the linear movement refers to movement along the length direction of the driving housing 100.

The sliding sleeve guide rod 203, the sliding sleeve guide rod 203 is connected with the connecting end, the specific connection mode is a threaded connection, and the sliding sleeve guide rod 203 has the functions of being connected with a circulating plugging valve sliding sleeve 204 described below and guiding the whole liquid flow part.

The circulation leaking stoppage valve sliding sleeve 204 is sleeved on the sliding sleeve adapter 202 and the sliding sleeve guide rod 203, and a gap is formed between the circulation leaking stoppage valve sliding sleeve 204 and the sliding sleeve adapter 202, that is to say, a liquid flow channel is formed between the circulation leaking stoppage valve sliding sleeve 204 and the sliding sleeve adapter 202, so the circulation leaking stoppage valve sliding sleeve 204 is mainly tightly connected with the outside of the sliding sleeve guide rod 203 and is not tightly connected with the sliding sleeve adapter 202; the outer side wall of the circulation leaking stoppage valve sliding sleeve 204 contacts with the inner wall of the driving shell 100, the communication hole 201 is formed in the outer side wall of the circulation leaking stoppage valve sliding sleeve 204, and meanwhile, in order to ensure tight connection between the circulation leaking stoppage valve sliding sleeve 204 and the driving shell 100, the sealing ring 101 is arranged near the bypass hole 101 of the driving shell 100, so that the situation that leaking stoppage materials cannot flow into the bottom of the driving shell 100 from between the driving shell 100 and the circulation leaking stoppage valve sliding sleeve 204 is ensured, and the whole circulation leaking stoppage valve is blocked.

Further, the sliding sleeve adapter 202 is hollow inside to form a first space; a plurality of side holes 2021 are formed in the side wall of the sliding sleeve adapter 202, and the side holes 2021 are communicated with the liquid flow channel, so that plugging materials can enter the sliding sleeve adapter 202; the inner wall of the sliding sleeve guide rod 203 is in threaded connection with the outer wall of the sliding sleeve adapter 202, the sliding sleeve guide rod 203 is hollow, a second space is formed, and the first space is communicated with the second space. The flow direction of the plugging material includes, in addition to the above-mentioned "drive housing 100-flow passage-communication hole 201-bypass hole 101-well leak: the drive housing 100, the flow passage, the side hole 2021, flows into the first space and the second space from the side hole 2021, respectively.

As shown in fig. 1, the drainage assembly 200 further includes: the fixed ring seat 205, the fixed ring seat 205 is a connecting component arranged in the driving housing 100 of the whole drainage assembly 200, so the fixed ring seat 205 is fixedly connected with the inner wall of the driving housing 100.

In order to prevent the fixed ring seat 205 from blocking the flow of the plugging material, besides the connecting hole formed in the middle of the fixed ring seat 205, a plurality of water holes 2051 are formed on the seat body along the circumferential direction of the connecting hole for ensuring the normal flow of the plugging material, and the connecting hole in the middle of the fixed ring seat 205 is fixedly connected with the driving assembly 300, so that the fixed ring seat 205 is also used as a connecting component between the driving assembly 300 and the driving housing 100.

As shown in fig. 2, the driving assembly 300 includes: a drive sleeve 301 and a drive section provided inside the drive sleeve 301;

the driving sleeve 301 is connected with the connecting hole, the driving sleeve 301 is hollow, and is provided with a limiting protrusion for limiting the moving distance of the driving part;

specifically, the driving sleeve 301 may be an integral body, or may be formed by splicing multiple shells, which is not specifically limited, so as to be capable of accommodating the components in the driving assembly 300, and since the driving assembly 300 can drive the liquid flow part to move at the first station and the second station, the movement range of the driving assembly 300 itself is limited, so that a limit protrusion is provided in the driving sleeve 301, and the driving part is ensured not to exceed the movement range when driving the sliding sleeve adapter 202 connected with the driving sleeve.

The driving part is connected with the adapter end and is used for driving the sliding sleeve adapter 202 to move along the extending direction of the driving shell 100, so that the communication hole 201 on the circulating plugging valve sliding sleeve 204 moves to be aligned with the bypass hole 101;

in combination with the foregoing, the sliding sleeve adapter 202, the sliding sleeve guide 203 and the circulation leaking stoppage valve sliding sleeve 204 move together, so when the driving part moves at the driving adapter end, the driving part also drives the sliding sleeve guide 203 and the circulation leaking stoppage valve sliding sleeve 204 to move, and at this time, the movement of the communication hole 201 on the circulation leaking stoppage valve sliding sleeve 204 relative to the driving housing 100 is performed, that is, the communication hole 201 has two states of alignment and dislocation with the bypass hole 101 in the moving process.

It should be noted that, in the present invention, the relative positions of the bypass hole 101, the drainage assembly 200 and the driving assembly 300 need to be adjusted by a technician according to practical situations, for example, how far the driving portion drives the liquid flow portion to move can align the bypass hole 101 with the communication hole 201, so that the setting position of the corresponding limiting protrusion can also be adjusted adaptively.

Further, the driving section includes: the driving seat 302, the driving seat 302 is used for fixedly connecting with the driving sleeve 301, so as to support the driving piece 303;

the driving element 303, the driving element 303 is disposed on the driving seat 302, the driving element 303 has a driving end, and the driving end is a driving shaft of a motor, for example, the type of the driving element 303 is a motor.

The lead screw 304 is in transmission connection with the driving end; the screw 304 is, for example, a ball screw 304, the screw 304 being connected to a drive shaft, the drive member 303 being adapted to drive the screw 304 in rotation.

The follower 305 is in threaded connection with the lead screw 304, the follower 305 is connected with the adapter, the follower 305 is used for connecting the lead screw 304 with the sliding sleeve adapter 202, the follower 305 can be externally connected with components such as the adapter 3051, the sliding sleeve outer cylinder 3052 or the transmission rod 3053, and further long-distance transmission is realized, for example, the follower 305 can be divided into the following parts, and the following parts mainly play a role of connecting a driving part with a liquid flow part.

It should be noted that, in order to ensure that the follower 305 will not fall out of the screw rod 304 during movement, a limiting protrusion is also provided inside the driving sleeve 301, so as to ensure that the follower 305 will not fall out of the screw rod 304 during linear movement, and the specific design position of the limiting protrusion needs to be set according to the position of the bypass hole 101 and the like, which is not limited herein.

The drive assembly further includes: the electric control part is mainly a module which is arranged in the driving sleeve 301 and is used for supplying power to the driving piece 303; meanwhile, the electric control part is also integrated with a signal receiving device, which can receive a command signal for controlling the driving part 303 to operate and control the driving part 303 to operate according to the command.

The electric control part is arranged in the driving sleeve 301 and is positioned at one end of the driving seat 302 far away from the driving piece 303; the electric control part is electrically connected with the driving part, and the electric control part is used for supplying power to the driving part 303 and controlling the operation working condition of the driving part 303, and the operation working condition at least comprises: start, stop and rotational speed.

As shown in fig. 1, in combination with the foregoing "the flow direction of the plugging material further includes: the contents of the driving housing 100, the fluid flow channel and the side hole 2021, that the side hole 2021 flows into the first space and the second space respectively, can know that the plugging material flows into the second space, that is, into the sliding sleeve guide 203, in order to prevent the plugging material from entering the driving housing 100, the inside of the driving housing 100 is further provided with a plug 400 and a buffer structure connected with the plug 400;

the plug 400 is positioned at one end of the sliding sleeve guide rod 203 far away from the sliding sleeve adapter 202, meanwhile, the position of the plug 400 is also defined as the bottom of the circulating plugging valve, and the other end of the plug 400 is the top of the circulating plugging valve, namely a port for plugging material to enter; the end of the plug 400, which is close to the sliding sleeve guide rod 203, is provided with a plug bulge 401, and the plug bulge 401 is matched with the second space and is used for being abutted against the sliding sleeve guide rod 203;

when the driving part drives the liquid flow part to move towards the second station, the whole liquid flow part moves towards the bottom of the circulating plugging valve, at the moment, the sliding sleeve guide rod 203 is abutted against the plug protrusion 401 of the plug 400, plugging material in the second space also cannot enter the driving shell 100, and at the moment, the plugging material only flows out of the circulating plugging valve through the communication hole 201 and the bypass hole 101.

The buffer structure is located at one end of the plug 400 far away from the sliding sleeve guide rod 203, and the buffer structure provides buffer for the contact between the sliding sleeve guide rod 203 and the plug 400, so as to offset the impact force received by part of the plug 400.

Specifically, the buffer structure is, for example, a cooperation between an elastic element and a limiting piece, the elastic element can be a disc spring 600, of course, the elastic element can also be replaced by a sponge or other design, the limiting piece can be a limiting nut 700 or a limiting piece, and the specific selection can be adjusted by a technician.

The circulation leaking stoppage valve further includes: the centralizing assembly 500, the centralizing assembly 500 being disposed at an end of the drive sleeve 301 remote from the slip joint 202, the centralizing assembly 500 being used for balancing the weight.

Specifically, the centralizing assembly 500 includes: centralizer 501 and caudal vertebra 502; the centralizer 501 is connected with the end of the driving sleeve 301, the centralizer 501 further comprises a centralizer shaft 5011, then the end of the original driving sleeve 301 of the centralizer shaft 5011 is provided with the tail cone 502, since the components inside the driving sleeve 301 are all concentrated at the position close to the bottom of the circulating plugging valve during installation (this is to ensure that the plugging operation is smoothly performed, the bypass hole 101 needs to reach the well leakage to a large extent, so that the closer the bypass hole 101 is to the bottom of the circulating plugging valve, the more leakage is repaired to the well with a larger depth when the circulating plugging valve is in a certain length, and further, the position of the bypass hole 101 also determines the position where the driving part and the liquid flow part are arranged close to the bottom of the circulating plugging valve), the centralizing assembly 500 is used for balancing the balance weight, and meanwhile, the design of the tail cone 502 can also plug the end opening of the driving sleeve 301, so that the plugging material cannot enter the driving sleeve 301 to influence the components inside the driving sleeve 301.

In summary, the specific working principle of the invention is as follows:

when the well leakage occurs, the well section of the well leakage needs to be determined, the circulating plugging valve is connected with a drilling tool which needs to be connected in a matched mode, and then the circulating plugging valve is placed into the well (attention needs to be paid, and the bypass hole 101 is guaranteed to be aligned with the well leakage).

Specifically, the actions directed to the circulation lost circulation valve include: the driving piece 303 receives a start command to drive the screw rod 304 to rotate, and because the follower 305 is in threaded connection with the screw rod 304, when the screw rod 304 rotates, the follower 305 also linearly moves along the extending direction of the screw rod 304, so as to drive the liquid flow part (the sliding sleeve adapter 202, the sliding sleeve guide rod 203 and the circulating plugging valve sliding sleeve 204) to reciprocate along the extending direction of the screw rod 304, thereby realizing the switching of the liquid flow part between the first station and the second station, when the liquid flow part reaches the second station, the plugging material enters the liquid flow part through the inside of the driving shell 100, and finally enters the bypass hole 101 through the communication hole 201 to be discharged to the lost circulation position, and thus the plugging operation is completed.

Example 2

The embodiment discloses a control method of a circulation leaking stoppage valve, which is applied to the circulation leaking stoppage valve in embodiment 1, wherein an execution main body of the control method is a control unit of a driving piece, and a computer, a mobile phone, a console and the like can be selected.

Specifically, as shown in fig. 5, the control method includes:

s100: establishing a plurality of groups of rotating speed sequences, wherein each group of rotating speed sequences at least comprises: rotational speed, steering, and run length corresponding to the rotational speed; wherein the rotation speed sequence is, for example, { 40r/min 2min clockwise } or { 70r/min 2min anticlockwise }; in connection with the embodiment 1, the clockwise and counterclockwise rotation directions are related to the direction of the movement of the liquid flow portion by the screw 304.

S200: dividing a plurality of groups of rotating speed sequences into a first instruction set and a second instruction set according to the steering; the first instruction set is used for controlling the opening of the circulating leakage stoppage valve, and the second instruction set is used for controlling the closing of the circulating leakage stoppage valve; in combination with the description of embodiment 1, controlling the circulation leakage stoppage valve to open means controlling the flow portion to approach the second station, and controlling the circulation leakage stoppage valve to close means controlling the flow portion to move in a direction away from the second station, that is, away from the bypass hole 101.

S300: the first instruction set and the second instruction set are used for controlling the operation of the driving element 303 respectively, which can be simply understood as that the driving element 303 is controlled to operate with different instruction sets under corresponding operation scenes.

In the actual operation process, when the operator selects the second instruction set, the electronic control part receives the instruction signal and then controls the driving part 301 to drive the lead screw 304 to move towards the direction close to the bottom of the circulation leakage stoppage valve, the rotation direction is omitted, and the specific whole action process (omitted rotation direction) is, for example, that the circulation leakage stoppage valve is controlled to be closed by the driving part when the operation is executed, wherein the rotation is performed for 2 minutes at 40r/min, then for 2 minutes at 70r/min and then for 3 minutes at 40 r/min; when the operator selects the second instruction set, the electronic control part receives the instruction signal and then controls the driving part 301 to drive the lead screw 304 to move in a direction away from the bottom of the circulation leaking stoppage valve, and the whole action process (omitting the rotation direction) is, for example, that the lead screw rotates for 2 minutes at 70r/min, then rotates for 2 minutes at 40r/min, and rotates for 3 minutes at 50r/min, and when the operation is executed, the driving part controls the leaking stoppage valve to open, and the rotating speed sequence is exemplified, and in practice, more than 3 groups of rotating speed sequences can be executed for each instruction set according to the use condition.

The control method is mainly used for preventing the lead screw 304 from driving the liquid flow part to move by mistake due to the fault problem of the electric drive part, so that the electric drive part can respond only when receiving the correct rotating speed sequence to further control the driving part 303 to rotate, and if the rotating speed sequence is not matched with the rotating speed sequence established in the earlier stage, the electric control block can not respond, the driving part 303 is effectively prevented from receiving a wrong control instruction by external interference, and the operation precision of the circulating plugging valve is greatly improved.

The above description is only illustrative of the preferred embodiments of the present invention and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in the present invention is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present invention (but not limited to) having similar functions are replaced with each other.

Claims (10)

1. A circulation lost circulation valve, comprising:

the driving device comprises a driving shell (100), wherein a bypass hole (101) communicated with the inside of the driving shell (100) is formed in the side wall of the driving shell (100); a plugging material flow passage is formed in the driving shell (100);

a drainage assembly (200), the drainage assembly (200) being disposed inside the drive housing (100), the drainage assembly (200) comprising a liquid flow portion; the liquid flow part is provided with a liquid flow channel communicated with the inside of the driving shell (100), and the side wall of the liquid flow part is provided with a communication hole (201);

the liquid flow part is provided with a first station and a second station; when the liquid flow part is at the first station, the communication hole (201) and the bypass hole (101) are arranged in a staggered mode; when the liquid flow part is in the second station, the communication hole (201) is aligned with the bypass hole (101);

the driving assembly (300) is used for driving the liquid flow part to be switched from the first station to the second station, and then the plugging material entering from the top of the driving shell (100) is discharged through the bypass hole (101) to perform plugging operation.

2. A circulating plugging valve according to claim 1, wherein,

the liquid flow portion includes:

a slip joint (202), the slip joint (202) having opposite mating and connecting ends, the mating end being connected to the drive assembly (300);

the sliding sleeve guide rod (203) is connected with the connecting end;

the circulating plugging valve sliding sleeve (204), the circulating plugging valve sliding sleeve (204) is sleeved on the sliding sleeve adapter (202) and the sliding sleeve guide rod (203), and the liquid flow channel is formed between the circulating plugging valve sliding sleeve (204) and the sliding sleeve adapter (202);

the outer side wall of the circulation leaking stoppage valve sliding sleeve (204) is in contact with the inner wall of the driving shell (100), and the communication hole (201) is formed in the outer side wall of the circulation leaking stoppage valve sliding sleeve (204).

3. A circulation plugging valve according to claim 2, wherein,

the drainage assembly (200) further comprises: a stationary ring seat (205);

the fixed ring seat (205) is fixedly connected with the inner wall of the driving shell (100);

the middle part of the fixed ring seat (205) is provided with a connecting hole, and a plurality of water passing holes (2051) are also formed in the seat body along the circumferential direction of the connecting hole; the connecting hole is fixedly connected with the driving assembly (300).

4. A circulating plugging valve according to claim 3, wherein,

the drive assembly (300) includes: a drive sleeve (301) and a drive unit provided inside the drive sleeve (301);

the driving sleeve (301) is connected with the connecting hole, the driving sleeve (301) is hollow, and is provided with a limiting protrusion, and the limiting protrusion is used for limiting the moving distance of the driving part;

the driving part is connected with the switching end and is used for driving the sliding sleeve switching joint (202) to move along the extending direction of the driving shell (100), so that the communication hole (201) on the circulating plugging valve sliding sleeve (204) moves to be aligned with the bypass hole (101).

5. A circulating plugging valve according to claim 4, wherein,

the driving section includes:

the driving seat (302), the said driving seat (302) is fixedly connected with said driving sleeve (301);

a driving element (303), wherein the driving element (303) is arranged on the driving seat (302); the driving member (303) has a driving end;

the lead screw (304), the said lead screw (304) is connected with said driving end drive;

the follower (305) is in threaded connection with the lead screw (304), and the follower (305) is connected with the switching end.

6. A circulating plugging valve according to claim 5, wherein,

the sliding sleeve adapter (202) is hollow to form a first space; a plurality of side holes (2021) are formed in the side wall of the sliding sleeve adapter (202), and the side holes (2021) are communicated with the liquid flow channel;

the inner wall of the sliding sleeve guide rod (203) is in threaded connection with the outer wall of the sliding sleeve adapter (202), and the inside of the sliding sleeve guide rod (203) is hollow to form a second space;

the first space is communicated with the second space.

7. A circulation plugging valve according to claim 6, wherein,

a plug (400) and a buffer structure connected with the plug (400) are further arranged in the driving shell (100);

the plug (400) is positioned at one end of the sliding sleeve guide rod (203) far away from the sliding sleeve adapter (202); one end of the plug (400) close to the sliding sleeve guide rod (203) is provided with a plug bulge (401), and the plug bulge (401) is matched with the second space and is used for being abutted against the sliding sleeve guide rod (203);

the buffer structure is located at one end of the plug (400) far away from the sliding sleeve guide rod (203).

8. A circulating plugging valve according to claim 5, wherein,

the drive assembly (300) further comprises: an electric control part;

the electric control part is arranged in the driving sleeve (301) and is positioned at one end of the driving seat (302) far away from the driving piece (303); the electric control part is electrically connected with the driving part, and is used for supplying power to the driving part (303) and controlling the operation working condition of the driving part (303), and the operation working condition at least comprises: start, stop and rotational speed.

9. The circulation lost circulation valve of claim 4, further comprising:

a centralizing assembly (500), the centralizing assembly (500) being disposed at an end of the drive sleeve (301) remote from the slip sleeve adapter (202); the righting assembly (500) is for a balance weight.

10. A control method of a circulation lost circulation valve according to any one of the preceding claims 1 to 9, the control method comprising:

establishing a plurality of groups of rotating speed sequences, wherein each group of rotating speed sequences at least comprises: rotational speed, steering, and run length corresponding to the rotational speed;

dividing a plurality of groups of rotating speed sequences into a first instruction set and a second instruction set according to the steering; the first instruction set is used for controlling the opening of the circulating leakage stoppage valve, and the second instruction set is used for controlling the closing of the circulating leakage stoppage valve;

and respectively controlling the operation of the driving piece by the first instruction set and the second instruction set.