CN209817991U - Clamping device, downhole tool and downhole releasing structure - Google Patents

Abstract

The application relates to the technical field of natural gas and oil exploitation, and discloses a clamping device, an underground tool and an underground releasing structure. The embodiment of the application provides a clamping device, the in-process of transferring in the oil gas well, the extruded piece is located the position of stepping down for clamping device can transfer the preset position in the oil gas well smoothly. After the clamping device arrives the predetermined position in the oil gas well, power unit drives the extruded piece and moves to the extrusion position, and the extruded piece radially outwards extrudes the clamping piece, makes the part of clamping piece move outside radial passage, and the clamping piece can imbed in the clearance of coupling department in the oil gas well this moment to make clamping device fixed in the oil gas well. When the clamping device needs to be taken out of the oil-gas well, the extrusion piece moves to the yielding position under the action of external force or a power mechanism, the clamping device is lifted upwards through the fishing device at the moment, the clamping piece moves radially inwards under the action of the external force and breaks away from the gap at the coupling, and therefore the clamping device can be fished out of the oil-gas well.

Description

Clamping device, downhole tool and downhole releasing structure

Technical Field

The application relates to the technical field of natural gas and oil exploitation, in particular to a clamping device, an underground tool and an underground releasing structure.

Background

In oil and gas wells, it is difficult to fix the downhole tool at a predetermined position in the well. Slip-in-place is currently used to secure downhole tools in predetermined locations in oil and gas wells. The slips are sheet or block-like members having teeth that can be caused to bite into the tubing by applying a sufficiently large radially outward force to the slips to secure the downhole tool in a predetermined position in the well. The problem with this approach is that it requires a significant force to be provided to enable the slips teeth to bite into the tubing, which is costly in the oil and gas well. In addition, the teeth of the slips bite into the tubing, which results in an almost permanent fixation of the downhole tool in the well, making it difficult to remove and replace the downhole tool.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a clamping device, and it can be convenient, simple and easy fix the preset position in the oil gas well, also can be convenient dismantle from the oil gas well simultaneously.

The embodiment of this application still provides a wellhead assembly who has above-mentioned locking device.

The embodiment of the application also provides a downhole release structure with the clamping device.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

in a first aspect, an embodiment of the present application provides a locking device, including:

the working column is provided with an axial channel extending along the axial direction and a radial channel extending along the radial direction, and the axial channel is intersected with the radial channel;

an extrusion disposed within the axial passage and configured to reciprocate along the axial passage between an extrusion position and a yield position;

a power mechanism connected to the extrusion and configured to drive the extrusion to move to an extrusion position; and

the clamping piece is movably arranged in the radial channel;

wherein the pressing piece is configured to press the clamping piece in the process of moving to the pressing position, so that at least part of the clamping piece moves outwards in the radial direction to the outside of the radial channel; when the extrusion piece is in the yielding position, the clamping piece can move inwards in the radial direction under the action of external force.

The embodiment of this application provides a clamping device, the in-process of transferring in the oil gas well, the extruded piece is located the position of stepping down, and the clamping device can get into radial passage completely under the effect of external force this moment for clamping device can transfer the preset position in the oil gas well smoothly. After the clamping device reaches a preset position in the oil and gas well, the power mechanism drives the extrusion piece to move to the extrusion position, the extrusion piece radially extrudes the clamping piece outwards, the part of the clamping piece moves to the outside of the radial channel, and the clamping piece can be embedded into a gap at the coupling in the oil and gas well at the moment. Because the extruded piece moves to the extrusion position for the card is fixed in can't radially inwards get into radial passage completely, leads to the card to be fixed in the clearance of coupling department in the oil gas well all the time in can embedding of card fixed piece, thereby makes clamping device fixed in the oil gas well. When the clamping device needs to be taken out of the oil-gas well, the extrusion piece moves to the yielding position under the action of external force or a power mechanism, the clamping device is lifted upwards through the fishing device at the moment, the clamping piece moves radially inwards under the action of the external force and breaks away from the gap at the coupling, and therefore the clamping device can be fished out of the oil-gas well. Through the card fixing device that the embodiment of this application provided, it can be convenient, simple and easy fix the preset position in the oil gas well, also can be convenient simultaneously dismantle from the oil gas well.

Further, the diameter of the end part of the pressing piece contacting with the clamping piece is gradually reduced along the direction from the yielding position to the pressing position.

Further, the detent member is configured to slide along the radial channel.

Furthermore, the clamping piece is a sphere, and a radial inward protruding limiting part is arranged at the opening of the radial channel; the limiting part is configured to prevent the clamping piece from being separated from the radial channel.

Further, the locking piece is rotatably arranged in the radial channel.

Furthermore, a limiting piece is arranged in the working column, and the clamping piece is provided with an inner abutting part and an outer abutting part; the limiting piece is positioned between the inner abutting part and the outer abutting part; when the extrusion piece moves to the extrusion position, the inner abutting part abuts against the limiting piece; when the extrusion piece completely enters the radial channel, the outer abutting part can abut against the limiting piece.

Furthermore, an outer limiting piece and an inner limiting piece are arranged in the working column, and the clamping piece is provided with an abutting part; the abutting part is positioned between the outer limiting part and the inner limiting part; when the extrusion piece moves to the extrusion position, the abutting part abuts against the outer limiting piece; when the extrusion piece is completely inserted into the radial channel, the abutting part can abut against the inner limiting piece.

Furthermore, the power mechanism is an elastic device and is in a compressed state, so that the extrusion part has a tendency to move to the extrusion position.

Further, the clamping device further comprises a connecting rod connected with the extrusion piece, one end, far away from the extrusion piece, of the connecting rod is provided with a containing groove, and a clamping hole or a clamping groove is formed in the inner wall of the containing groove.

Furthermore, the connecting rod comprises an end head, a connecting cylinder, a middle rod and a buffer spring; the holding tank is arranged on the end head, the end head is fixedly connected with the middle rod, and the middle rod is matched with the connecting cylinder in a sliding way; the buffer spring is sleeved on the middle rod, and two ends of the buffer spring are respectively abutted against the end head and the connecting cylinder.

Further, the power mechanism comprises a motor, an external thread piece with external threads and an internal thread piece with internal threads, and the external thread piece is in thread fit with the internal thread piece;

the external screw member is connected with an output shaft of the motor, the internal screw member is connected with the extrusion member, and the internal screw member is configured to move in an axial direction of the working column when the external screw member rotates;

or an internal threaded member is connected to an output shaft of the motor and an external threaded member is connected to the extrusion member, the external threaded member being configured to move along an axis of the working column when the internal threaded member rotates.

In a second aspect, embodiments of the present application also provide a downhole tool comprising:

any one of the above locking devices; and

and a function executing member mounted on the locking device.

The embodiment of the application provides a downhole tool, owing to have above-mentioned arbitrary clamping device for the clamping device that the embodiment of this application provided can be convenient, simple and easy fix the preset position in the oil gas well, also can be convenient simultaneously dismantle from the oil gas well.

Further, the function executing part includes a mixed flow projection provided on an outer peripheral surface of the working column and extending spirally around the working column.

In a third aspect, embodiments of the present application also provide a downhole delivery structure comprising:

the locking device comprises a first locking device, a second locking device and a force bearing component;

the first locking device is the locking device described in any one of the above 9 th or 10 th aspects; the second locking device is the locking device described in the above 11 th item;

the working column of the second clamping device extends into the accommodating groove of the first clamping device, the clamping piece of the second clamping device is embedded into the clamping hole or the clamping groove of the first clamping device, and the extrusion piece of the second clamping device is positioned at the extrusion position;

one end of the force bearing component is fixedly connected with the second clamping device, the other end of the force bearing component abuts against the first clamping device, and the extrusion part of the first clamping device is located at the yielding position.

Embodiments of the present application provide a downhole application structure in which, when lowered, the pressing piece of the locking device described in item 11 is located at the pressing position so that the locking piece thereof is embedded in the locking hole or the locking groove of the locking device described in item 9 or 10, maintaining the pressing piece of the locking device described in item 9 or 10 at the abdicating position. Upon reaching a predetermined position in the oil and gas well, the motor of the latching device described in item 11 moves the extrusion to a yield position such that the latching device described in item 11 disengages from the latching device described in item 9 or 10. The locking device of items 9 or 10 wherein the actuating mechanism is extended to move the extrusion member to the extrusion position, such that the locking member moves radially outward and engages the gap at the collar, thereby securing the locking device of items 9 or 10 in the well. When the clamping device described in item 9 or 10 needs to be taken out, the connecting rod is pulled upwards only through the fishing device, the connecting rod drives the extrusion piece to move towards the yielding position, and the clamping device can move radially inwards and is separated from a gap at the coupling, so that the clamping device can be fished out of an oil-gas well. Through the structure that discharges that the embodiment of this application provided, it can be convenient, simple and easy transfer and fix the predetermined position in the oil gas well with clamping device, also can be convenient simultaneously dismantle clamping device from the oil gas well.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly described below. It is appreciated that the following drawings depict only certain embodiments of the application and are not to be considered limiting of its scope. From these figures, other figures can be derived by those skilled in the art without inventive effort.

Fig. 1 is a schematic external structural view of a locking device provided in embodiment 1 of the present application;

FIG. 2 is a schematic cross-sectional view of a locking device provided in embodiment 1 of the present application, wherein the pressing member is located at a position of abduction;

FIG. 3 is a schematic cross-sectional view of a locking device provided in embodiment 1 of the present application, wherein a pressing member is located at a pressing position;

fig. 4 is a schematic structural view of a locking member in the locking device provided in embodiment 1 of the present application;

FIG. 5 is an enlarged view taken at A of FIG. 1;

FIG. 6 is a schematic view of a partial structure of a tubing in an oil and gas well;

fig. 7 is a partial state view of the locking device provided in embodiment 1 of the present application fixed in an oil pipe;

FIG. 8 is a schematic cross-sectional view of the locking device provided in embodiment 2 of the present application, wherein the pressing member is located at the abdicating position;

FIG. 9 is a schematic cross-sectional view of a locking device according to embodiment 2 of the present application, in which a pressing member is located at a pressing position;

FIG. 10 is a schematic view of a downhole tool provided in example 3 of the present application;

FIG. 11 is a schematic structural view of a downhole delivery structure provided in example 4 of the present application.

In the figure: 01-a downhole deployment structure; 11-a force bearing part; 010-a locking device; 110-a working column; 111-axial channel; 111 a-a first annular flange; 112-radial channels; 112 a-a receiving groove; 113-a stop; 114-a receiving hole; 115-blocking bolts; 120-an extrusion; 121-a second annular flange; 130-a power mechanism; 140-a detent; 141-a shaft body; 142-a clamping block; 143-an insert; 144-an inner abutment; 145-outer abutment; 146-a maintenance groove; 150-a connecting rod; 150 a-a receiving tank; 150 b-a locking hole; 151-end; 152-a connector barrel; 153-intermediate bar; 154-a buffer spring; 020-clamping device; 021-matrix; 022-sealing the cartridge; 210-a working column; 211-axial channel; 212-radial channels; 212 a-a stop; 220-extrusion; 230-a power mechanism; 231-a motor; 232-external screw thread; 233-internal screw thread; 234-a rod member; 240-a detent; 030-downhole tools; 400-a function execution unit; 900-oil pipe; 910-sub-oil pipe; 920-coupling; 930-gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described in detail and completely with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments.

Thus, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of some embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that, in the embodiments and the features and technical solutions in the embodiments of the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like refer to the orientation or positional relationship based on the drawings, or the orientation or positional relationship that the utility model is used to put, or the orientation or positional relationship that the skilled person usually understands, and such terms are only for convenience of describing and simplifying the description, but do not refer to or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, "oil and gas well" may refer to both oil and gas wells. When the "oil and gas well" is a natural gas well, it may be a natural gas well for collecting conventional natural gas, or a natural gas well for collecting unconventional natural gas (shale gas, coal bed gas, etc.).

Example 1:

the present embodiment provides a locking device 010. Fig. 1 is a schematic external structural view of a locking device 010 according to an embodiment of the present application. Fig. 2 is a schematic cross-sectional view of the locking device 010 according to the embodiment of the present application, wherein the pressing member 120 is located at the position of giving way. Fig. 3 is a schematic cross-sectional view of the locking device 010 according to the embodiment of the present application, in which the pressing member 120 is located at the pressing position.

Referring to fig. 1, 2 and 3, in the present embodiment, the locking device 010 includes a working column 110, an extrusion member 120, a power mechanism 130 and a locking member 140.

The working column 110 is provided with an axial passage 111 extending along the axial direction. The axial passage 111 is open at one end and the axial passage 111 is closed at the other end. The working column 110 is further provided with a radial passage 112 extending in the radial direction. The radial channel 112 is close to the closed end of the axial channel 111, the radial channel 112 intersects the axial channel 111, and both ends of the radial channel 112 are open.

The pressing member 120 has an overall cylindrical shape, and is inserted into the axial passage 111 from the open end of the axial passage 111. The pressing member 120 is capable of reciprocating in the axial direction of the work column 110 between a displaced position (the position shown in fig. 2) and a pressing position (the position shown in fig. 3).

The power mechanism 130 is coupled to the extrusion member 120 for moving the extrusion member 120 to the extrusion position. The power mechanism 130 may employ an electric drive, a pneumatic drive, or a hydraulic drive to reciprocate the extrusion 120 between the yield position and the extrusion position. In this embodiment, the power mechanism 130 is an elastic device, and the power mechanism 130 is always in a compressed state. The power mechanism 130 applies a resilient force to the extrusion 120 such that the extrusion 120 has a tendency to move toward the extrusion position. Specifically, in the present embodiment, the power mechanism 130 is a spring. A first annular flange 111a projecting radially inward is provided at the open end of the axial passage 111, and a second annular flange 121 projecting radially outward is also provided on the outer peripheral surface of the pressing member 120. The actuating unit 130 is fitted over the extrusion member 120, and both ends of the actuating unit 130 abut against the first annular flange 111a and the second annular flange 121, respectively.

The locking member 140 is movably disposed within the radial passage 112. In this embodiment, two locking members 140 are provided, one at each end of the radial passage 112. A detent 140 is rotatably disposed within the radial passage 112. Fig. 4 is a schematic structural diagram of the locking member 140 in this embodiment. Specifically, the locking member 140 is a plate having a certain thickness, and protruding shaft bodies 141 are provided on both sides of the locking member 140. Fig. 5 is an enlarged view of fig. 1 at a. The two clamping blocks 142 are respectively provided with a circular hole (not shown) for accommodating the shaft body 141, and the shaft body 141 is inserted into the circular hole and rotatably matched with the circular hole. Receiving grooves 112a to be fitted with the clamping blocks 142 are respectively provided at opposite sides of the radial passage 112. The clamping block 142 is inserted into the receiving groove 112a in a radial direction, and the locking member 140 enters the radial passage 112 along with the clamping block 142. The clamp block 142 is fixed in the receiving groove 112a by bolts, pins, or welding. The radially outward side of the locking member 140 has an insertion portion 143 protruding radially outward. The detent member 140 can be rotated radially outward to move the insert 143 out of the work string 110 and project radially outward relative to the outer peripheral surface of the work string 110. The detent member 140 can rotate radially inward such that the detent member 140 is entirely located within the radial passage 112.

The limit positions of the radially outward rotation and the radially inward rotation of the latching member 140 are required to be defined. If the locking member 140 is rotated outward or radially too much, the locking device 010 may not be smoothly lowered, fixed or taken out from the oil and gas well. For this reason, in the present embodiment, a stopper 113 (shown in fig. 7) is provided in the inner space of the work column 110. The limiting members 113 correspond to the locking members 140 one by one. The limiting member 113 is located below the locking member 140. The lower end of the locking piece 140 is provided with an inner abutting portion 144 and an outer abutting portion 145 which protrude downward. The outer abutment 145 is located radially outward of the inner abutment 144. The limiting member 113 is located between the inner abutment 144 and the outer abutment 145. During the rotation of the locking member 140 radially outward, when the inner abutting portion 144 abuts against the limiting member 113, the locking member 140 moves radially outward to the limit. During the rotation of the locking member 140 in the radial direction, when the external abutting portion 145 abuts against the limiting member 113, the locking member 140 moves in the radial direction to the limit. In the present embodiment, the limiting member 113 is a pin fixedly disposed in the inner space of the working column 110. In other embodiments, an outer limiting member and an inner limiting member may be disposed in the inner space of the working column 110, and an abutting portion between the outer limiting member and the inner limiting member may be disposed on the locking member 140. During the rotation of the locking member 140 radially outward, when the abutting portion abuts against the outer limiting member, the locking member 140 moves radially outward to the limit. During the rotation of the locking member 140 in the radial direction, when the abutting portion abuts against the inner limiting member, the locking member 140 moves in the radial direction to the limit.

In the present embodiment, the locking device 010 further includes a connection rod 150 connected to the pressing member 120. The connecting rod 150 is connected to the end of the extrusion 120 outside the axial passage 111. An accommodating groove 150a is provided at one end of the connecting rod 150 remote from the pressing member 120, and a locking hole 150b is opened at an inner wall of the accommodating groove 150 a. Note that, in other embodiments, the locking hole 150b may be a locking groove. The locking device 010 can be selectively fixed to or released from the discharge device through the receiving groove 150a and the locking hole 150 b. The connection and disconnection between the engagement means 010 and the dispensing means will be described hereinafter.

Further, in the present embodiment, the connection rod 150 includes a head 151, a connection cylinder 152, an intermediate rod 153, and a buffer spring 154. The receiving groove 150a is opened on the tip 151. The head 151 is fixedly connected to one end of the intermediate rod 153, and the other end of the intermediate rod 153 is inserted into the connecting cylinder 152 and slidably engaged with the connecting cylinder 152. The connector barrel 152 is fixedly connected to the end of the expression member 120 outside the axial passage 111. The buffer spring 154 is sleeved on the middle rod 153, and two ends of the buffer spring 154 are respectively abutted against the end head 151 and the connecting cylinder 152. After the locking device 010 is fixed in the oil and gas well, a downhole tool (for example, a plunger) moving in the oil and gas well collides with the locking device 010 to cause an impact on the locking device 010. The connecting rod 150 of the above-described structure can alleviate these impacts. When the downhole tool descends to the position where the locking device 010 is located, the downhole tool collides with the end head 151, and the end head 151 drives the middle rod 153 to move downwards, so that the buffer spring 154 is compressed, the buffer effect is realized, and the influence of collision impact on the locking device 010 is reduced.

Fig. 6 is a schematic view of a partial structure of a tubing 900 in an oil and gas well. Fig. 7 is a partial state diagram of the locking device 010 according to the present embodiment fixed in the oil pipe 900. Tubing 900 includes a plurality of sub-tubes 910 arranged in an axial direction, and adjacent sub-tubes 910 are connected by couplings 920. The end of sub-tubing 910 is provided with external threads and the ends of collar 920 are provided with internal threads. Two ends of the coupling 920 are respectively in threaded connection with two adjacent sub-oil pipes 910, and a gap 930 is formed between the two adjacent sub-oil pipes 910. The locking device 010 according to the present embodiment has the locking piece 140 that can enter the gap 930 to fix the locking device 010 in the oil pipe 900.

The clamping device 010 that the embodiment of this application provided, the in-process of transferring in the oil gas well, extruded piece 120 are located the position of stepping down, and the card is decided 140 and can be got into radial passage 112 completely under the effect of external force this moment for the card is decided 140 and can be transferred the predetermined position in the oil gas well. When the clamping device 010 reaches a preset position in an oil and gas well, the power mechanism 130 drives the extrusion part 120 to move to the extrusion position, the extrusion part 120 radially extrudes the clamping piece 140 outwards, the clamping piece 140 partially moves out of the radial channel 112, and the embedding part 143 of the clamping piece 140 can be embedded into a gap 930 at the coupling 920 in the oil pipe 900. Due to the fact that the pressing piece 120 moves to the pressing position, the clamping piece 140 cannot completely enter the radial channel 112 in the radial direction, the embedding portion 143 of the clamping piece 140 can be embedded into the gap 930 at the coupling 920 in the oil pipe 900 all the time, and therefore the clamping device 010 is fixed in the oil and gas well. When the locking device 010 needs to be taken out of the oil-gas well, the fishing device is combined with the connecting rod 150, the fishing device lifts the connecting rod 150 upwards, and the connecting rod 150 drives the extrusion piece 120 to move towards the abdicating position by overcoming the elastic force of the power mechanism 130. The fishing device also drives the entire locking device 010 to move upward when the fishing device lifts the connecting rod 150 upward. At this time, the locking piece 140 moves radially inward under the action of the compression, so that the embedding part 143 is separated from the gap 930 at the coupling 920, and the locking device 010 can be fished out of the oil and gas well. The locking device 010 provided by the embodiment can be conveniently and simply fixed at a preset position in an oil and gas well, and can be conveniently detached from the oil and gas well.

Further, the locking device 010, during the lowering process in the oil and gas well, the extrusion member 120 is located at the yielding position, and at this time, the locking member 140 can completely enter the radial passage 112 under the action of the external force, and may also move radially outwards to the outside of the radial passage 112. When the locking piece 140 moves out of the radial passage 112, there is a possibility that lowering of the locking device 010 in the oil and gas well is hindered. For this reason, in the present embodiment, when the locking device 010 is lowered in the oil and gas well, the locking piece 140 is always completely located in the radial passage 112. A retaining groove 146 is provided at a side of the latching member 140. A receiving hole 114 extending radially inward and communicating with the radial passage 112 is opened in the outer peripheral surface of the working column 110, a spring (not shown) is disposed in the receiving hole 114, and a blocking bolt 115 is mounted at a radially outward end of the receiving hole 114. A stopper ball (not shown) is disposed at one end of the receiving hole 114 facing radially inward, and both ends of the spring respectively abut against the stopper bolt 115 and the stopper ball. When the locking member 140 is lowered in the oil and gas well, the locking member 140 is completely positioned in the radial channel 112, and the limiting ball is embedded into the maintaining groove 146 under the action of the spring, so that the position of the locking member 140 is limited, and the locking member 140 is prevented from moving radially outwards to the outside of the radial channel 112. When the clamping piece 140 reaches a preset position in the oil-gas well, the power mechanism 130 drives the extrusion piece 120 to move to the extrusion position, the extrusion piece 120 radially extrudes the clamping piece 140 outwards, the limiting ball compresses the spring and is separated from the maintaining groove 146, and the clamping piece 140 radially moves outwards under the action of the extrusion piece 120.

Further, an annular member protruding radially outward is provided on the head 151, and the annular member is used to be coupled with a fishing device to take the locking device 010 out of the oil and gas well.

Further, in the present embodiment, the power mechanism 130 is a spring. In the process of lowering the locking device 010, the discharge device is fixedly connected with the locking device 010, and maintains the extrusion member 120 at the abdicating position, and the power mechanism 130 is in a compressed state. When the dispensing device is separated from the locking device 010, the power mechanism 130 drives the extrusion member 120 to move to the extrusion position. In other embodiments, the power mechanism 130 may also be an electrically driven power mechanism, for example, the power mechanism 130 includes a motor, an external screw member having an external thread, and an internal screw member having an internal thread, and the external screw member and the internal screw member are in threaded engagement; the external screw member is connected with an output shaft of the motor, the internal screw member is connected with the extrusion member, and the internal screw member is configured to move in an axial direction of the working column when the external screw member rotates; or an internal threaded member is connected to an output shaft of the motor and an external threaded member is connected to the extrusion member, the external threaded member being configured to move along an axis of the working column when the internal threaded member rotates. (not shown in the figure)

Example 2:

the present embodiment provides a locking device 020. Fig. 8 is a schematic cross-sectional view of a locking device 020 according to an embodiment of the present application, wherein the pressing member 220 is located at the abdicating position. Fig. 9 is a schematic cross-sectional view of a locking device 020 according to an embodiment of the present application, in which the pressing member 220 is located at a pressing position.

Referring to fig. 8 and 9, in the present embodiment, the locking device 020 includes the working column 210, the pressing member 220, the power mechanism 230, and the locking member 240.

The working column 210 is provided with an axial passage 211 extending along the axial direction. Both ends of the axial passage 211 are open, and the other end of the axial passage 211 is closed. The working column 210 is further provided with a radial passage 212 extending in the radial direction. The radial channel 212 is near the closed end of the axial channel 211, the radial channel 212 intersects the axial channel 211, and both ends of the radial channel 212 are open. The opening of the radial passage 212 is provided with a stopper portion 212a protruding radially inward.

The pressing member 220 has an overall cylindrical shape, and is inserted into the axial passage 211 from one end of the axial passage 211. The pressing member 220 is capable of reciprocating in the axial direction of the work column 210 between a displaced position (the position shown in fig. 8) and a pressing position (the position shown in fig. 9).

A power mechanism 230 is coupled to the extrusion member 220 for moving the extrusion member 220 to the extrusion position. The power mechanism 230 may employ an electric drive, a pneumatic drive, or a hydraulic drive to reciprocate the extrusion 220 between the yield position and the extrusion position. In this embodiment, the power mechanism 230 includes a motor 231, an external screw member 232 having an external thread, and an internal screw member 233 having an internal thread, the external screw member 232 and the internal screw member 233 being screw-coupled; the external screw member 232 is connected to an output shaft of the motor 231, the internal screw member 233 is connected to the pressing member 220, and the internal screw member 233 is configured to move in an axial direction of the column 210 when the external screw member 232 is rotated. Specifically, the locking device 020 further includes a cylindrical base 021 and a sealing cylinder 022. The sealing cylinder 022 is fixedly connected with one end of the base 021. The working column 210 is fixed to the other end of the base 021. A portion of the working post 210 is located within the base 021 and another portion of the working post 210 is located outside of the base 021. The radial passage 212 is located outside the base 021. The motor 231 is disposed within the sealed canister 022 and is fixedly coupled to the base 021. The female screw member 233 is disposed in the base body 021 and is axially slidably and non-rotatably engaged with the base body 021. Specifically, in the present embodiment, the outer surface of the internal thread member 233 is provided with a groove extending along the axial direction, and a pin penetrating through the peripheral wall of the base body 021 is slidably engaged with the groove of the internal thread member 233, so that the internal thread member 233 and the base body 021 are slidably and non-rotatably engaged in the axial direction. The internally threaded member 233 is connected to the pressing member 220 via a rod member 234. A shaft seal can also be provided between the rod 234 and the base 021 to prevent liquid from entering the sealing barrel 022 and protect the motor 231. It is understood that in other embodiments, the internally threaded member 233 may be connected to the output shaft of the motor 231, the externally threaded member 232 may be connected to the pressing member 220, and the externally threaded member 232 may be configured to move along the axis of the column 210 when the internally threaded member 233 rotates.

In this embodiment, the latch 240 is slidable along the radial channel 212. The stopper portion 212a can prevent the latching member 240 from completely escaping from the radial passage 212. Specifically, the locking member 240 is a ball. The detent member 240 is rollably disposed within the radial passage 212 along the radial passage 212. The detent member 240 can be located entirely within the radial passage 212 or can be located partially outside the radial passage 212.

The clamping device 020 that the embodiment of this application provided, the in-process of transferring in the oil gas well, power unit 230 drive extruded piece 220 and move to the position of stepping down, and card fixed piece 240 can get into radial passage 212 completely under the effect of external force this moment for card fixed piece 240 can transfer the preset position in the oil gas well. After the locking device 020 reaches a preset position in an oil and gas well, the power mechanism 230 drives the extrusion piece 220 to move to the extrusion position, the extrusion piece 220 radially extrudes the locking piece 240 outwards, the locking piece 240 partially moves out of the radial passage 212, and the part, located outside the radial passage 212, of the locking piece 240 can be embedded into a gap 930 at the coupling 920 in the oil pipe 900. Due to the fact that the pressing piece 220 moves to the pressing position, the clamping piece 240 cannot completely enter the radial channel 212 in the radial direction, the portion, located outside the radial channel 212, of the clamping piece 240 can be embedded into the gap 930 at the coupling 920 in the oil pipe 900 all the time, and therefore the clamping device 020 is fixed in the oil and gas well. When the clamping device 020 needs to be taken out of the oil and gas well, the extrusion piece 220 moves to the yielding position under the action of the power mechanism 230, the clamping device 020 is lifted upwards through the fishing device at the moment, the clamping piece 240 moves inwards in the radial direction under the action of external force, the clamping piece 240 is separated from the gap 930 at the coupling 920, and the clamping device 020 can be fished out of the oil and gas well. Through the card fixing device 020 that this embodiment provided, it can be convenient, simple and easy fix the preset position in the oil gas well, also can be convenient simultaneously dismantle from the oil gas well.

Example 3:

the present embodiment provides a downhole tool 030. Fig. 10 is a schematic structural diagram of the downhole tool 030 according to the present embodiment. The downhole tool 030 according to the present embodiment includes the locking device 010 described in embodiment 1 or the locking device 020 described in embodiment 2. The present embodiment will be described by taking the locking device 010 described in embodiment 1 as an example. The downhole tool 030 provided by the present embodiment further includes a function performing member 400 mounted on the locking device 010. The function executing part 400 can be conveniently fixed at a preset position in the oil and gas well along with the locking device 010 and also can be conveniently detached from the oil and gas well along with the locking device 010.

The function executing part 400 is a part capable of performing a certain function in a hydrocarbon well, such as a temperature detecting device for collecting temperature data in the hydrocarbon well, a pressure detecting device for collecting pressure data in the hydrocarbon well, or a flow rate detecting device for collecting flow rate data in the hydrocarbon well. In the present embodiment, the function executing member 400 includes a mixed flow projection provided on the outer peripheral surface of the work column 110 and extending spirally around the work column 110. The function executing part 400 is used for enabling gas and liquid ascending in the oil-gas well to rotate and mix when passing by, forming bubble flow, and further improving the efficiency of plunger lifting drainage.

Example 4:

the present embodiment provides a downhole delivery structure 01. Fig. 11 is a schematic structural view of a downhole application structure 01 according to the present embodiment. The underground releasing structure 01 comprises a first clamping device, a second clamping device and a force bearing part 11. The first locking device is the locking device 010 described in embodiment 1. The second locking device is the locking device 020 described in example 2.

The operation column 210 of the locking device 020 extends into the accommodation groove 112a of the locking device 010, the locking piece 240 of the locking device 020 is inserted into the locking hole 150b of the locking device 010, and the pressing piece 220 of the locking device 020 is located at the pressing position. One end of the force bearing component 11 is fixedly connected with the clamping device 020, the other end of the force bearing component 11 abuts against the clamping device 010, and the extrusion piece 120 of the clamping device 010 is located at an abdicating position.

Specifically, the force-bearing component 11 is a cylindrical component, one end of which is sleeved on the base 021 together with one end of the locking device 020, and is fixedly connected with the base 021 through a pin. A part of the locking device 010 is accommodated in the bearing member 11, and the other end of the bearing member 11 abuts against the operation post 110 of the locking device 010. This causes the power mechanism 130 of the locking device 010 to be in a compressed state, and the pressing member 120 of the locking device 010 to be located at the retracted position.

After the actuating mechanism 230 of the locking device 020 drives the extrusion member 220 to move to the receding position, the locking piece 240 of the locking device 020 is separated from the locking hole 150b of the locking device 010 by the elastic restoring force of the actuating mechanism 130 of the locking device 010, and the locking device 020 and the locking device 010 are separated from each other. Further, under the elastic restoring force of the power mechanism 130 of the locking device 010, the extrusion member 120 of the locking device 010 moves to the extrusion position, so that the locking member 140 moves radially outward, and the locking device 010 can be fixed at a predetermined position in the oil gas well.

It will be appreciated that the force-bearing part 11 may have other shapes, such as a strip shape, in other embodiments.

The above description is only a few examples of the present application and is not intended to limit the present application, and those skilled in the art will appreciate that various modifications and variations can be made in the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (14)

1. A locking device, comprising:

the working column is provided with an axial channel extending along the axial direction and a radial channel extending along the radial direction, and the axial channel is intersected with the radial channel;

a ram disposed within the axial passage and configured to reciprocate along the axial passage between a ram position and a yield position;

a power mechanism coupled to the extrusion and configured to drive the extrusion to move to the extrusion position; and

the clamping piece is movably arranged in the radial channel;

wherein the pressing member is configured to press the clamping member during the movement to the pressing position, so that the clamping member moves at least partially radially outwards to the outside of the radial passage; when the extruded piece is in the abdicating position, the clamping piece can move inwards in the radial direction under the action of external force.

2. The locking device of claim 1, wherein:

and the diameter of the end part of the extrusion piece, which is contacted with the clamping piece, is gradually reduced along the direction from the yielding position to the extrusion position.

3. The locking device of claim 1, wherein:

the detent member is configured to slide along the radial channel.

4. The locking device of claim 3, wherein:

the clamping piece is a sphere, and a radial inward protruding limiting part is arranged at an opening of the radial channel; the limiting part is configured to prevent the clamping piece from being separated from the radial channel.

5. The locking device of claim 1, wherein:

the clamping piece is rotatably arranged in the radial channel.

6. The locking device of claim 5, wherein:

a limiting piece is arranged in the working column, and the clamping piece is provided with an inner abutting part and an outer abutting part; the limiting piece is positioned between the inner abutting part and the outer abutting part;

when the extrusion piece moves to the extrusion position, the inner abutting part abuts against the limiting piece; the outer abutment is capable of abutting the stop when the extrusion is fully advanced into the radial passage.

7. The locking device of claim 5, wherein:

an outer limiting piece and an inner limiting piece are arranged in the working column, and the clamping piece is provided with a propping part; the abutting part is positioned between the outer limiting part and the inner limiting part;

when the extrusion piece moves to the extrusion position, the abutting part abuts against the outer limiting piece; the abutting portion is capable of abutting against the inner retainer when the extrusion is fully entered into the radial passage.

8. A locking device according to any one of claims 1-7, characterized in that:

the power mechanism is an elastic device and is in a compressed state, so that the extrusion part has a tendency of moving to the extrusion position.

9. The locking device of claim 8, wherein:

the clamping device further comprises a connecting rod connected with the extrusion piece, one end, far away from the extrusion piece, of the connecting rod is provided with a holding tank, and a clamping hole or a clamping groove is formed in the inner wall of the holding tank.

10. The locking device of claim 9, wherein:

the connecting rod comprises an end head, a connecting cylinder, a middle rod and a buffer spring; the accommodating groove is formed in the end head, the end head is fixedly connected with the middle rod, and the middle rod is matched with the connecting cylinder in a sliding mode; the buffer spring is sleeved on the middle rod, and two ends of the buffer spring are respectively abutted against the end head and the connecting cylinder.

11. A locking device according to any one of claims 1-7, characterized in that:

the power mechanism comprises a motor, an external thread piece with external threads and an internal thread piece with internal threads, and the external thread piece is in thread fit with the internal thread piece;

the external screw member is connected with an output shaft of the motor, the internal screw member is connected with the extrusion member, and the internal screw member is configured to move in an axial direction of the working column when the external screw member is rotated;

or the internal screw member is connected to an output shaft of the motor, and the external screw member is connected to the pressing member, the external screw member being configured to move along an axis of the working column when the internal screw member is rotated.

12. A downhole tool, comprising:

the anchoring device of any one of claims 1-11; and

and a function executing member attached to the locking device.

13. The downhole tool of claim 12, wherein:

the function execution part comprises a mixed flow bulge which is arranged on the outer circumferential surface of the working column and extends spirally around the working column.

14. A downhole deployment structure, comprising:

the locking device comprises a first locking device, a second locking device and a force bearing component;

the first locking device is the locking device according to any one of claims 9 or 10; the second locking device is the locking device of claim 11;

the working column of the second clamping device extends into the accommodating groove of the first clamping device, the clamping piece of the second clamping device is embedded into the clamping hole or the clamping groove of the first clamping device, and the extrusion piece of the second clamping device is positioned at the extrusion position;

one end of the force bearing part is fixedly connected with the second clamping device, the other end of the force bearing part abuts against the first clamping device, and the extrusion part of the first clamping device is located at the yielding position.