CN113882821B - Releasing device and releasing method for underground oil field throwing tool - Google Patents
Releasing device and releasing method for underground oil field throwing tool Download PDFInfo
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- CN113882821B CN113882821B CN202111233397.5A CN202111233397A CN113882821B CN 113882821 B CN113882821 B CN 113882821B CN 202111233397 A CN202111233397 A CN 202111233397A CN 113882821 B CN113882821 B CN 113882821B
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- 238000000034 method Methods 0.000 title claims description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 80
- 230000000903 blocking effect Effects 0.000 claims description 20
- 230000005484 gravity Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 210000002445 nipple Anatomy 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
Abstract
The releasing device of the underground tool in the oil field comprises a releasing short circuit and a driving mechanism, wherein the releasing short circuit is connected with the underground tool to be released; the tool to be put in the well is provided with a salvaging head which is inserted into the release short circuit; the sliding support frame and the ball are arranged in the release short circuit; the inner wall of the release short circuit is provided with two annular grooves, and radial through holes are respectively arranged at two ends of the sliding support frame. The problem that an existing releasing device salvaging head is easy to slip from a latch hook, special tools are needed for connecting a downhole tool to be put in, and sealing elements of a cable blowout preventer are easy to damage is solved. The downhole tool to be put in is suitable for being provided with an outer fishing head, and comprises a downhole testing tool for wire operation, a hanger of a testing instrument such as a downhole thermometer and a downhole sampler; a production allocation device for oil extraction production; pumping a perforation connected bridge plug tool; a safety valve, a blanking plug and a sliding sleeve for multi-layer fracturing of the fixed pipe column; and the device also comprises a throttle valve, a manifold oil nozzle and other testing tools which are matched with the ground metering device.
Description
Technical Field
The invention relates to the field of oilfield downhole operation equipment, in particular to a release device and a release method of an oilfield downhole delivery tool.
Background
In the development process of oil fields, no matter drilling, oil testing and production testing, well logging, oil extraction or well repair operation is carried out, the well-drilling device is widely applied to downhole tools. There are many kinds of downhole tools, some of which are to stay for a certain time or stay permanently at a predetermined depth in the well, these tools are all put into the predetermined depth position in the well from the surface through an oil pipe, a cable or a steel wire, then the anchoring mechanism of the downhole tool is started to be clamped on the wall of the well, the casing or the well wall, so as to realize fixation, and meanwhile, the release of the put tool from the downhole tool is realized. The release of the running tool from the downhole tool is performed by a release device of the running tool, which is typically activated mechanically or electrically, hydraulically. When the release device of the downhole tool is designed, the release device is matched with the corresponding wellhead blowout preventer, the transverse profile and the size are consistent with those of the wellhead blowout preventer, and the longitudinal length is as short as possible so as to obtain longer payload length; also, the outer circumference of the release device of the downhole tool should not have protrusions beyond the outer diameter as much as possible to prevent damage to the seal of the blowout preventer when passing through the blowout preventer. As shown in fig. 9, in the conventional electrically-activated release device, a release slider 805 is typically connected to a motor-driven activation device 807, and the slider supports a latch hook mechanism 803 to hold a fishing head of a fishing rod 801 of a downhole tool to be released, and when the downhole tool needs to be released, the motor is activated to drive the release slider 805 to move away, and the latch hook mechanism 803 which is not supported is pushed by a spring to release the fishing head of the downhole tool to release the downhole tool. The existing release devices have the following problems: 1. because the latch hook mechanism of the existing electric starting release device is a fishing head of the downhole tool hooked at one side, the fishing head is easy to slip from the latch hook; 2. when the releasing device of the latch hook mechanism is connected with a downhole tool, the latch hook is pressed by a special purpose tool, and the latch hook is hooked with the fishing head and simultaneously inserted into the sliding block to lock the latch hook. 3. The latch hook of the prior latch hook mechanism is released and then protrudes outwards, and the sealing element of the blowout preventer is easily hung or damaged when the latch hook meets a joint underground or passes through the blowout preventer.
Disclosure of Invention
In view of the above, the present invention provides a releasing device and a releasing method for an oilfield downhole releasing tool, so as to solve the problems that when the existing releasing device is hooked with a fishing head through a latch hook, the connection is unstable, the fishing head is easy to slip from the latch hook, the operation process is complicated when the fishing head is connected, and the existing releasing device is tilted up to protrude from the outer wall of the releasing device after the latch hook is released, and when encountering a blowout preventer, the sealing element of the blowout preventer is easy to be hung or damaged.
In a first aspect, the present invention provides a release device for an oilfield downhole delivery tool, comprising: the short circuit, the sliding support frame, the first ball, the second ball and the driving mechanism are released;
the release short circuit is hollow, and a first annular groove and a second annular groove are formed in the inner wall of the hollow;
the sliding support frame is positioned in the release short circuit, the sliding support frame is hollow, two ends of the sliding support frame are provided with openings, the first ball is positioned in a first through hole on the side wall of the sliding support frame, the second ball is positioned in a second through hole on the side wall of the sliding support frame, the first through hole is close to one end of the release short circuit, and the second through hole is close to the other end of the release short circuit;
a blocking part is arranged between the first through hole and the second through hole on the inner wall of the sliding support frame;
the driving mechanism is connected with the release short circuit; one part of the driving mechanism is positioned in the release short circuit and is used for being inserted into the sliding support frame to push the second ball to move towards the inner wall of the release short circuit;
the distance between the first annular groove and the second annular groove is greater than the distance between the first through hole and the second through hole.
Preferably, the driving mechanism includes: an output shaft and a release slider;
one end of the output shaft is connected with the release slide block through a threaded structure, the other end of the output shaft is connected with a motor in the driving mechanism, and the motor is used for driving the output shaft to rotate.
Preferably, the release nipple has an observation hole, the observation hole is located at a side of the second ring groove away from the first ring groove, and the observation hole is used for observing the position of the release slider.
Preferably, the device further comprises a positioning mechanism;
the shape of the inner part of the release short circuit is matched with the shape of the outer part of the sliding support frame;
the body of release slider is the cylinder, positioning mechanism is used for when the output shaft rotates, prevent release slider is along with the output shaft rotates.
Preferably, the positioning mechanism comprises: a positioning rod;
the peripheral surface of the release sliding block is provided with a groove parallel to the axial direction of the release sliding block, and the position of the groove corresponds to the position of the second through hole;
the locating rod is used for extending into the release short circuit from the observation hole when the output shaft rotates, and the locating rod props against the release sliding block to prevent the release sliding block from rotating.
Preferably, the openings near the center of the release short circuit are provided with convex edges extending toward the center of the first through hole and the center of the second through hole, and the convex edges are used for preventing the first ball and the second ball from falling from the openings near the center of the release short circuit.
Preferably, the inner wall of the release short circuit is provided with a limiting part;
the limiting part is positioned at one side of the second annular groove, which is far away from the first annular groove, on the inner wall of the release short circuit;
the limiting part is used for limiting the moving position of the sliding support, so that when one end, close to the second through hole, of the sliding support is contacted with the limiting part, the second through hole and the second annular groove are all overlapped.
Preferably, the depth of the first ring groove is smaller than the radius of the first ball;
the depth of the second annular groove is smaller than the radius of the second ball;
the wall thickness of the sliding support frame is smaller than the diameters of the first ball and the second ball.
Preferably, 1-8 first through holes are formed in the sliding support frame, the axes of all the first through holes are located on the same plane perpendicular to the axis of the sliding support frame, and the first balls are respectively arranged in each first through hole;
the sliding support frame is provided with 1-8 second through holes, the axes of all the second through holes are positioned on the same plane perpendicular to the axis of the sliding support frame, and each second through hole is internally provided with a second ball respectively.
In a second aspect, the present invention provides a method for releasing an oilfield downhole delivery tool, including a release device of the oilfield downhole delivery tool, including:
when the position of the first through hole in the release short circuit is overlapped with the position of the first annular groove, inserting a fishing rod of the downhole tool to be put into the release short circuit from an opening at one end of the release short circuit into the release short circuit and into a sliding support frame in the release short circuit;
when the salvaging head of the salvaging rod contacts with the blocking part in the sliding support frame, the salvaging rod is continuously inserted, the salvaging rod and the salvaging head push the blocking part and the sliding support frame to move towards the other end of the release short circuit until the sliding support frame contacts with the limiting part, and the second through hole is overlapped with the second annular groove;
controlling the driving mechanism to start, enabling a part of the driving mechanism to move into the sliding support frame until the driving mechanism is overlapped with the second through hole, and completing connection between the downhole tool to be put and the release short circuit;
a release step of throwing the connected downhole tool to be thrown into the well, the oilfield downhole throwing tool and the release device into the well, and stopping throwing when reaching a preset depth;
and controlling the driving mechanism to start, enabling a part of the driving mechanism to move towards the direction away from the sliding support frame until the driving mechanism is not contacted with the second ball, at the moment, the sliding support frame is pulled by the fishing rod to move downwards until the first ball is overlapped with the first annular groove, and the fishing head is separated from the release short circuit under the action of self gravity of the downhole tool to be thrown, so that the downhole tool to be thrown is thrown.
The invention has the following beneficial effects:
the invention provides a release device and a release method of an oilfield downhole delivery tool. The connecting and releasing process is simple and easy to operate, the operation can be completed without other auxiliary tools or skills, all the components are positioned inside the releasing short circuit, and the external parts of the components are not provided with protruding parts so as not to hang the sealing element in the blowout preventer. When the existing release device is hooked with the salvage head through the latch hook, the salvage head is easy to slip from the latch hook, and the operation process is complex when the salvage head is connected, and the existing release device is tilted to protrude out of the outer wall of the release device after the latch hook is released, so that the problem that the sealing element of the blowout preventer is easy to hang or damage when encountering the blowout preventer is solved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a release connection process for an oilfield downhole delivery tool according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a connection state between a release device and a fishing head of an oilfield downhole delivery tool according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a release device of an oilfield downhole delivery tool according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a sliding support frame according to an embodiment of the invention.
Fig. 5 is a cross-sectional view taken along the A-A plane of fig. 4.
Fig. 6 is a partially enlarged view of the region M of fig. 5.
Fig. 7 is a schematic view of the structure of the release slider according to the embodiment of the present invention.
Fig. 8 is a B-direction view of fig. 7.
Fig. 9 is a schematic structural view of a conventional electrically activated release device.
In fig. 1-8, 1-fishing rod, 101-fishing head, 2-release short, 201-first ring groove, 202-second ring groove, 203-viewing hole, 3-sliding support frame, 301-first through hole, 302-second through hole, 303-flange, 304-blocking part, 401-first ball, 402-second ball, 5-release slide, 501-groove, 6-output shaft, 7-driving mechanism, 9-limit part.
In fig. 9, 800-an existing release tool to be launched, 801-a fishing rod of an existing release tool to be launched, 802-a release short of an existing release, 803-a latch hook mechanism of an existing release, 805-a release slide of an existing release; 807-actuation means of the existing release means.
Detailed Description
The present invention is described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. However, for the part not described in detail, the present invention is also fully understood by those skilled in the art.
Furthermore, those of ordinary skill in the art will appreciate that the drawings are provided solely for the purposes of illustrating the objects, features, and advantages of the invention and that the drawings are not necessarily drawn to scale.
Meanwhile, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
FIG. 1 is a schematic diagram of a release connection process for an oilfield downhole delivery tool according to an embodiment of the present invention. Fig. 2 is a schematic structural view of a connection state between a release device and a fishing head of an oilfield downhole delivery tool according to an embodiment of the present invention. Fig. 3 is a schematic diagram of a release device of an oilfield downhole delivery tool according to an embodiment of the present invention. Fig. 4 is a schematic structural view of a sliding support frame according to an embodiment of the invention. Fig. 5 is a cross-sectional view taken along the A-A plane of fig. 4. Fig. 6 is a partially enlarged view of the region M of fig. 5. Fig. 7 is a schematic view of the structure of the release slider according to the embodiment of the present invention. Fig. 8 is a B-direction view of fig. 7. Fig. 9 is a schematic structural view of a conventional electrically activated release device. As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, a release device for an oilfield downhole delivery tool, comprising: the release short circuit 2, the sliding support frame 3, the first ball 401, the second ball 402 and the driving mechanism 7; the release short circuit 2 is hollow, and a first annular groove 201 and a second annular groove 202 are formed in the inner wall of the hollow; the sliding support frame 3 is positioned in the release short circuit 2, the sliding support frame 3 is hollow, two ends of the sliding support frame 3 are provided with openings, the first ball 401 is positioned in a first through hole 301 on the side wall of the sliding support frame 3, the second ball 402 is positioned in a second through hole 302 on the side wall of the sliding support frame 3, the first through hole 301 is close to one end of the release short circuit 2, and the second through hole 302 is close to the other end of the release short circuit 2; a blocking part 304 is arranged between the first through hole 301 and the second through hole 302 on the inner wall of the sliding support frame 3; the driving mechanism 7 is connected with the release short circuit 2; a part of the driving mechanism 7 is positioned in the release short circuit 2 and is used for being inserted into the sliding support frame 3 to push the second ball 402 to move towards the inner wall of the release short circuit 2; the distance between the first ring groove 201 and the second ring groove 202 is greater than the distance between the first through hole 301 and the second through hole 302.
The downhole delivery tool is used for delivering the downhole tool to be delivered downhole, and the release device is part of the downhole delivery tool for connecting or releasing the downhole tool to be delivered. The downhole tool to be launched is provided with a fishing rod 1, and the tail end of the fishing rod 1 is provided with a fishing head 101.
In the embodiment of the present invention, one end of the release short circuit 2, which is close to the first ring groove 201, is an opening, and the driving mechanism 7 is connected with one end of the release short circuit 2, which is close to the second ring groove 202. The inside of the release short circuit 2 is matched with the outside shape of the sliding support frame 3, and the outer side wall of the sliding support frame 3 is attached to the inner side wall of the release short circuit 2. The diameter of the salvage head 101 is slightly smaller than the inner diameter of the sliding support frame 3, and when the salvage head 101 is positioned in the sliding support frame 3, the outer side wall of the salvage head 101 is attached to the inner side wall of the sliding support frame 3.
When in connection, the initial position of the sliding support frame 3 is positioned at one end, close to the first ring groove 201, in the release short circuit 2, and at the moment, the first through hole 301 is overlapped with the first ring groove 201; the fishing rod 1 to be put in the downhole tool is inserted from the opening at one end of the release nipple 2, and when the fishing head 101 of the fishing rod 1 moves below the sliding support frame 3, the fishing head 101 is inserted into the sliding support frame 3 from the opening at one end of the sliding support frame 3, namely, the opening at one end close to the first through hole 301. When the fishing head 101 passes through the first ball 401 in the sliding support frame 3, if a part of the first ball 401 protrudes out of one side of the first through hole 301 near the inside of the sliding support frame 3, the fishing head 101 will squeeze a part of the first ball 401 into the first ring groove 201 when passing, so that the fishing head 101 is smoothly inserted into the sliding support frame 3 until one end of the fishing head 101 abuts against the blocking portion 304. Continuing to insert the fishing rod 1, the fishing rod 1 and the fishing head 101 push the sliding support frame 3 to move towards the direction close to the second ring groove 202 in the release short circuit 2 against the blocking part 304 until the second through hole 302 overlaps with the second ring groove 202. At this time, the first ball 401 moves out of the first ring groove 201 due to the movement of the sliding support frame 3, and moves toward the center of the sliding support frame 3 due to the extrusion of the inner wall of the release nipple 2, and the portion of the first ball 401 protrudes from the side of the first through hole 301 near the inner wall of the sliding support frame 3, so that the fishing head 101 is clamped between the first ball 401 and the blocking portion 304, and cannot be separated. The driving mechanism 7 is activated, and a part of the driving mechanism 7 moves toward the sliding support 3 until a part of the driving mechanism 7 overlaps with the second ball 402. The diameter of the driving mechanism 7 is slightly smaller than the inner diameter of the sliding support frame 3, when a part of the driving mechanism 7 moves to overlap with the second ball 402, a part of the second ball 402 is extruded into the second ring groove 202, and the second ball 402 is clamped in the second ring groove 202 and the second through hole 302, so that the position of the sliding support frame 3 is fixed, and the connection between the fishing rod 1 and the release short circuit 2 is completed.
The well connected releasing device of the oil field underground throwing tool and other underground tool strings such as a pressure gauge hanger, a weighting rod and the like are thrown into the underground; when the predetermined depth is reached, the lowering of the tool string is stopped. The driving mechanism 7 is started, a part of the driving mechanism 7 moves in a direction away from the sliding support frame 3 until the second ball 402 is out of contact with the driving mechanism 7, and meanwhile, the sliding support frame 3 is pulled downwards under the action of self gravity of the fishing rod 1, so that the sliding support frame 3 moves towards the direction of the release short circuit 2 close to the first annular groove 201 until the first ball 401 overlaps with the first annular groove 201. When the fishing head 101 of the fishing rod 1 moves downwards and passes through the first ball 401, the first ball 401 is extruded into the first annular groove 201, and the fishing head 101 continues downwards after passing through the first ball 401 until the fishing head is separated from the release short circuit 2, so that release is completed.
In the present invention, the driving mechanism 7 includes: an output shaft 6 and a release slider 5; one end of the output shaft 6 is connected with the release slide block 5 through a threaded structure, the other end of the output shaft is connected with a motor in the driving mechanism 7, and the motor is used for driving the output shaft 6 to rotate.
In the embodiment of the invention, when the fishing rod 1 is connected, after being inserted into the sliding support frame 3, the fishing rod is pushed to move the sliding support frame 3 until the second ball 402 is overlapped with the second ring groove 202, a motor in the driving mechanism 7 is started, the motor drives the output shaft 6 to rotate reversely, and the release slide block 5 is in threaded connection with the output shaft 6, so that the release slide block 5 moves along the output shaft 6 towards the direction close to the sliding support frame 3 until the release slide block 5 moves to be overlapped with the second ball 402, and at the moment, the outer side wall of the release slide block 5 is contacted with the inner side of the sliding support frame 3, so that the second ball 402 is extruded into the second ring groove 202. The second ball 402 is clamped in the second ring groove 202 and the second through hole 302, so that the position of the sliding support frame 3 is fixed, and the connection between the fishing rod 1 and the release short circuit 2 is completed.
When releasing, the motor is started, the motor drives the output shaft 6 to rotate positively, and the release slide block 5 moves along the output shaft 6 in a direction away from the sliding support frame 3 until the release slide block 5 and the second ball 402 are completely in non-contact. The fishing rod 1 drives the sliding support frame 3 to move downwards due to gravity, so that the second balls 402 leave the second annular groove 202, and when the first balls 401 overlap with the first annular groove 201, the fishing head 101 is separated from the release short circuit 2 downwards, so that release is completed.
In the invention, the release short circuit 2 is provided with an observation hole 203, the observation hole 203 is positioned on one side of the second ring groove 202 away from the first ring groove 201, and the observation hole 203 is used for observing the position of the release slider 5.
In the embodiment of the present invention, the observation hole 203 is a through hole on the release short circuit 2, through which the position of the release slider 5 moving inside the release short circuit 2 can be observed.
In the invention, the device also comprises a positioning mechanism; the inner part of the release short circuit 2 is matched with the outer shape of the sliding support frame 3; the body of the release slide 5 is a cylinder, and the positioning mechanism is used for preventing the release slide 5 from rotating along with the output shaft 6 when the output shaft 6 rotates.
In the embodiment of the present invention, when the body of the release short circuit 2 and the sliding support frame 3 are set to be cylindrical, the body of the release slider 5 should also be set to be cylindrical, so that the outer sidewall of the release slider 5 and the inner sidewall of the sliding support frame 3 can be completely contacted. If the release slider 5 is a cylinder, when the output shaft 6 rotates, the release slider 5 will rotate along with the output shaft 6 inside the release short circuit 2, but will not move back and forth along the output shaft 6, at this time, a positioning mechanism needs to be provided to limit the release slider 5 to rotate together when the output shaft 6 rotates.
In the present invention, the positioning mechanism includes: a positioning rod; the peripheral surface of the release slide 5 is provided with a groove 501 parallel to the axial direction of the release slide 5, and the position of the groove 501 corresponds to the position of the second through hole 302; the positioning rod is used for extending into the release short circuit 2 from the observation hole 203 when the output shaft 6 rotates, and is propped against the release sliding block 5 to prevent the rotation of the release short circuit 2.
In the embodiment of the present invention, the inner surface of the groove 501 is in a circular arc shape, so as to fit the outer shape of the second ball 402. When the release slide block 5 is connected, the motor is started to drive the output shaft 6 to rotate reversely, in order to prevent the release slide block 5 from rotating together, one end of the positioning rod needs to extend into the release short circuit 2 through the observation hole 203, and the one end of the positioning rod abuts against the surface of the release slide block 5 and lightly presses the surface of the release slide block 5 to prevent the release slide block 5 from rotating, so that the release slide block 5 moves downwards along the output shaft 6 until the release slide block 5 overlaps with the second ball 402. Since the position of the groove 501 corresponds to the positions of the second through hole 302 and the second ball 402, when the second ball 402 is pushed into the second ring groove 202 by the release slider 5, the portion of the second ball 402 facing the middle of the sliding support frame 3 will be located in the groove 501. During release, the motor drives the output shaft 6 to rotate positively, and as a part of the second ball 402 is positioned in the groove 501, the release slide 5 is limited not to rotate along with the output shaft 6, so that the release slide 5 can move along the output shaft 6 in a direction away from the sliding support frame 3 until the release slide is completely in non-contact with the second ball 402. Wherein the sum of the depth of the second ring groove 202 and the wall thickness of the sliding support 3 should not be greater than or equal to the diameter of the second ball 402.
In the present invention, the openings of the first through hole 301 and the second through hole 302 near the center of the release short circuit 2 have a protruding edge 303 extending toward the center of the first through hole 301 and the second through hole 302, respectively, and the protruding edge 303 is used for preventing the first ball 401 and the second ball 402 from falling from the openings of the first through hole 301 and the second through hole 302 near the center of the release short circuit 2.
In the embodiment of the invention, a convex edge 303 extending towards the center direction of the first through hole 301 is arranged on one side, close to the center direction of the sliding support frame 3, of the first through hole 301 along the circumference of the inner ring of the hole; one side of the second through hole 302, which is close to the center direction of the sliding support frame 3, is provided with a convex edge 303 extending towards the center direction of the second through hole 302 along the circumference of the inner ring of the hole. The distance between the upper and lower ledges 303 is smaller than the diameters of the first ball 401 and the second ball 402. When the sliding support frame 3 moves back and forth in the releasing short circuit 2, the first ball 401 and the second ball 402 slide out from the first ring groove 201 and the second ring groove 202, and are pushed to the center direction of the sliding support frame 3 by the inner wall of the releasing short circuit 2, the convex edge 303 can prevent the first ball 401 and the second ball 402 from falling into the sliding support frame 3 from the openings of the first through hole 301 and the second through hole 302.
In the invention, the inner wall of the release short circuit 2 is provided with a limit part 9; the limiting part 9 is positioned at one side of the second annular groove 202, which is far away from the first annular groove 201, on the inner wall of the release short circuit 2; the limiting portion 9 is used for limiting the moving position of the sliding support, so that when one end, close to the second through hole 302, of the sliding support 3 is in contact with the limiting portion 9, the second through hole 302 and the second ring groove 202 are all overlapped.
In the embodiment of the present invention, the limiting portion 9 is a protruding portion of the inner wall of the release short circuit 2, and the protruding portion is disposed on the side of the inner wall of the release short circuit 2, which is far away from the first annular groove 201, of the second annular groove 202. When the salvage head 101 pushes the sliding support frame 3 to move towards the second annular groove 202, the position of the second through hole 302 is overlapped with the position of the second annular groove 202, the end part of the sliding support frame 3, which is close to one end of the second through hole 302, is contacted with the bottom surface of the limiting part 9, so that when the salvage rod 1 is connected, an operator judges that the sliding support frame 3 and the second ball 402 have moved to the designated position when the salvage rod 1 cannot be inserted inwards any more, namely the second ball 402 is overlapped with the second annular groove 202.
In the present invention, the depth of the first ring groove 201 is smaller than the radius of the first ball 401; the depth of the second ring groove 202 is smaller than the radius of the second ball 402; the wall thickness of the sliding support 3 is smaller than the diameters of the first ball 401 and the second ball 402.
In the embodiment of the present invention, if the depth of the first ring groove 201 and the second ring groove 202 is greater than the radius of the first ball 401 and the second ball 402, the first ball 401 may enter the first ring groove 201, the second ball 402 may enter the second ring groove 202, and the first ball 401 and the second ball 402 cannot slide out of the ring groove when the sliding support frame 3 moves, so as to clamp the sliding support frame 3. Similarly, if the wall thickness of the sliding support 3 exceeds the diameters of the first ball 401 and the second ball 402, the fishing head 101 and the release slider 5 cannot push the first ball 401 and the second ball 402 into the first ring groove 201 and the second ring groove 202.
In the present invention, 1 to 8 first through holes 301 are provided on the sliding support frame 3, the axes of all the first through holes 301 are located on the same plane perpendicular to the axis of the sliding support frame 3, and each first through hole 301 is provided with a first ball 401; the sliding support 3 is provided with 1-8 second through holes 302, the axes of all the second through holes 302 are located on the same plane perpendicular to the axis of the sliding support 3, and each second through hole 302 is respectively provided with a second ball 402.
In the embodiment of the invention, the plurality of first balls 401 and the plurality of second balls 402 on the same plane can better clamp the fishing head 101 and the sliding support frame 3 from different directions on the peripheral surface of the sliding support frame 3, so that the fishing rod 1 and the downhole tool to be put in are more firmly connected with the release short circuit 2.
The invention also provides a release method of the oil field underground release tool, which comprises the release device of the oil field underground release tool, and specifically comprises the following steps: when the position of the first through hole in the release short circuit is overlapped with the position of the first annular groove, inserting a fishing rod of the downhole tool to be put into the release short circuit from an opening at one end of the release short circuit into the release short circuit and into a sliding support frame in the release short circuit; when the salvaging head of the salvaging rod contacts with the blocking part in the sliding support frame, the salvaging rod is continuously inserted, the salvaging rod and the salvaging head push the blocking part and the sliding support frame to move towards the other end of the release short circuit until the sliding support frame contacts with the limiting part, and the second through hole is overlapped with the second annular groove; controlling the driving mechanism to start, enabling a part of the driving mechanism to move into the sliding support frame until the driving mechanism is overlapped with the second through hole, and completing connection between the downhole tool to be put and the release short circuit; a release step of throwing the connected downhole tool to be thrown into the well, the oilfield downhole throwing tool and the release device into the well, and stopping throwing when reaching a preset depth; and controlling the driving mechanism to start, enabling a part of the driving mechanism to move towards the direction away from the sliding support frame until the driving mechanism is not contacted with the second ball, at the moment, the sliding support frame is pulled by the fishing rod to move downwards until the first ball is overlapped with the first annular groove, and the fishing head is separated from the release short circuit under the action of self gravity of the downhole tool to be thrown, so that the downhole tool to be thrown is thrown. The releasing method of the oilfield downhole releasing tool does not need to use a special tool to be matched with a releasing device to connect the downhole tool to be released, and the operation process is simpler and faster.
When the position of the first through hole in the release short circuit is overlapped with the position of the first annular groove, inserting a fishing rod of the downhole tool to be put into the release short circuit from an opening at one end of the release short circuit into the release short circuit and into a sliding support frame in the release short circuit; when the salvaging head of the salvaging rod contacts with the blocking part in the sliding support frame, the salvaging rod is continuously inserted, the salvaging rod and the salvaging head push the blocking part and the sliding support frame to move towards the other end of the release short circuit until the sliding support frame contacts with the limiting part, and the second through hole is overlapped with the second annular groove; and controlling the driving mechanism 7 to start, so that a part of the driving mechanism 7 moves into the sliding support frame until the driving mechanism overlaps with the second through hole, and completing the connection between the downhole tool to be put and the release short circuit.
In the embodiment of the invention, when the downhole tool to be put is connected, the downhole tool to be put is firstly connected with the fishing rod 1. The release slide 5 of the drive mechanism 7 is in the initial position, i.e. above the second ball 402. And one end of the release short circuit 2, which is close to the second ball 402, is upwards, the sliding support frame 3 in the release short circuit 2 moves downwards due to self gravity, and when the bottom in the release short circuit 2 is reached, the first ball 401 on the sliding support frame 3 is overlapped with the first ring groove 201 in the release short circuit 2.
The fishing head 101 of the fishing rod 1 is inserted into the release short circuit 2 from the opening at one end of the release short circuit 2 close to the first annular groove 201, and when the fishing head 101 moves to the lower side of the sliding support frame 3, the fishing head 101 is inserted into the sliding support frame 3 from the opening at one end of the sliding support frame 3 close to the first ball 401. When the fishing head 101 passes through the first ball 401 in the sliding support frame 3, the first ball 401 is pushed into the first ring groove 201, so that the fishing head 101 is smoothly inserted into the sliding support frame 3 until one end of the fishing head 101 abuts against the blocking portion 304. Continuing to insert the fishing rod 1, the fishing head 101 pushes the blocking part 304 and the sliding support frame 3 to move in the direction close to the second ring groove 202 in the release short circuit 2 until one end of the sliding support frame 3 close to the second ring groove 202 abuts against the limiting part 9, and the limiting part 9 blocks the sliding support frame 3, so that the fishing rod 1 cannot be continuously inserted, and the second through hole 302 overlaps with the second ring groove 202. Meanwhile, the first ball 401 moves out of the first ring groove 201 due to the movement of the sliding support frame 3, and the first ball 401 moves towards the center direction of the sliding support frame 3 due to the extrusion of the inner wall of the release short circuit 2. Since the diameter of the first ball 401 is larger than the wall thickness of the sliding support 3, a portion of the first ball 401 protrudes from one side of the first through hole 301 near the inner wall of the sliding support 3. Because the diameter of the fishing head 101 is only slightly smaller than the inner diameter of the sliding support frame 3, the fishing head 101 is clamped above the part of the first ball 401 protruding out of the first through hole 301 and cannot be separated from the sliding support frame 3 downwards. One end of the positioning rod stretches into the release short circuit 2 through the observation hole 203, one end of the positioning rod props against and lightly presses the surface of the groove 501 on the release sliding block 5 to prevent the release sliding block 5 from rotating, then the motor of the driving mechanism 7 is started, the motor drives the output shaft 6 to rotate reversely, the release sliding block 5 moves along the output shaft 6 towards the direction close to the sliding support frame 3 until the release sliding block 5 moves to overlap with the second ball 402, at the moment, the outer side wall of the release sliding block 5 contacts with the inner side of the sliding support frame 3, the second ball 402 is partially extruded into the second annular groove 202, and the other part of the second ball 402 is simultaneously positioned in the groove 501 of the release sliding block 5. The second ball 402 is clamped in the second ring groove 202 and the second through hole 302, so that the position of the sliding support frame 3 is fixed to prevent sliding down, and the fishing rod 1 is connected with the release short circuit 2.
A release step of throwing the connected downhole tool to be thrown into the well, the oilfield downhole throwing tool and the release device into the well, and stopping throwing when reaching a preset depth; and controlling the driving mechanism to start, enabling a part of the driving mechanism to move towards the direction away from the sliding support frame until the driving mechanism is not contacted with the second ball, at the moment, the sliding support frame is pulled by the fishing rod to move downwards until the first ball is overlapped with the first annular groove, and the fishing head is separated from the release short circuit under the action of self gravity of the downhole tool to be thrown, so that the downhole tool to be thrown is thrown.
In the embodiment of the invention, the release device of the well connected oilfield downhole delivery tool, the downhole tool to be delivered, the weighting rod and other downhole tool strings are put into the well, when the preset depth is reached, the delivery of the tool strings is stopped, the delay control driving mechanism 7 is started, the motor drives the output shaft 6 to rotate positively, and as a part of the second ball 402 is positioned in the groove 501 of the release slide block 5, the release slide block 5 is limited not to rotate along with the output shaft 6, so that the release slide block 5 moves along the output shaft 6 in a direction far away from the sliding support frame 3 until the release slide block is completely in non-contact with the second ball 402. The salvage rod 1 moves downwards under gravity to drive the sliding support frame 3 to slide downwards so that the second ball 402 leaves the second annular groove 202, when the sliding support frame 3 moves to one end, close to the first annular groove 201, in the release short circuit 2, the first ball 401 overlaps with the first annular groove 201, the salvage head 101 moves downwards to push the part, protruding out of the first through hole 301, of the first ball 401 into the first through hole 301, a part of the first ball 401 enters the first annular groove 201, and the salvage head 101 continues downwards until the release short circuit 2 is released, so that release is completed.
The releasing device and the releasing method of the underground throwing tool in the oil field are also applicable to other underground tools which are provided with a fishing rod and a fishing head and need to stay for a period of time or stay permanently at a preset depth in the pit, and comprise a hanger and an underground sampler of an underground test tool for steel wire operation, an underground thermometer and other test instruments; a production allocation device for oil extraction production; a perforation assisted bridge plug tool; downhole tools such as safety valves, plugs and the like for multi-layer fracturing of a fixed tubular string; there are also downhole throttles and the like for use with the surface separator. Meanwhile, the design of the invention is matched with the corresponding wellhead blowout preventer, the transverse profile and the size are consistent with those of the wellhead blowout preventer, the longitudinal length is shorter, and the longer payload length is obtained. By arranging a plurality of first balls 401 to surround the fishing head 101 for locking the downhole tool, the locking is firm, and the fishing head 101 cannot slip from the release short circuit 2; when the release device is connected with the downhole tool, a special tool is not needed, and the fishing head 101 is only required to be directly inserted into the release short circuit 2 to prop against the blocking part 304, so that the sliding support frame 3 is pushed to slide in place towards the direction of the driving mechanism 7, the release sliding block 5 extrudes the second ball 402, and the second ball 402 in the second through hole 302 is blocked in the sliding support frame 3 to lock the sliding support frame 3. The release nipple of the present invention has no protrusions on its periphery and does not catch or damage the seal of the blowout preventer when it encounters a joint downhole or passes through the blowout preventer.
The above examples are merely illustrative embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications, equivalent substitutions, improvements, etc. can be made by those skilled in the art without departing from the spirit of the present invention, and these are all within the scope of the present invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A release device for an oilfield downhole delivery tool, comprising: the release short circuit (2), the sliding support frame (3), the first ball (401), the second ball (402) and the driving mechanism (7);
the release short circuit (2) is hollow, and a first annular groove (201) and a second annular groove (202) are formed in the inner wall of the hollow;
the sliding support frame (3) is positioned inside the release short circuit (2), the inside of the sliding support frame (3) is hollow, two ends of the sliding support frame are provided with openings, the first ball (401) is positioned in a first through hole (301) on the side wall of the sliding support frame (3), the second ball (402) is positioned in a second through hole (302) on the side wall of the sliding support frame (3), the first through hole (301) is close to one end of the release short circuit (2), and the second through hole (302) is close to the other end of the release short circuit (2);
a blocking part (304) is arranged between the first through hole (301) and the second through hole (302) on the inner wall of the sliding support frame (3);
the driving mechanism (7) is connected with the release short circuit (2); a part of the driving mechanism (7) is positioned in the release short circuit (2) and is used for being inserted into the sliding support frame (3) to push the second ball (402) to move towards the inner wall of the release short circuit (2);
the distance between the first annular groove (201) and the second annular groove (202) is larger than the distance between the first through hole (301) and the second through hole (302);
when in connection, the initial position of the sliding support frame (3) is positioned at one end, close to the first annular groove (201), in the release short circuit (2), and at the moment, the first through hole (301) is overlapped with the first annular groove (201); inserting a fishing rod (1) of a downhole tool to be put into the sliding support frame (3) from an opening at one end of the release short circuit (2), and inserting the fishing head (101) of the fishing rod (1) into the sliding support frame (3) from an opening at one end of the sliding support frame (3) close to the first through hole when the fishing head (101) moves below the sliding support frame (3); when the salvage head (101) passes through the first ball (401) in the sliding support frame (3), if a part of the first ball (401) protrudes out of one side of the first through hole (301) close to the interior of the sliding support frame (3), the salvage head (101) can squeeze a part of the first ball (401) into the first annular groove (201) when passing through, so that the salvage head (101) is smoothly inserted into the sliding support frame (3) until one end of the salvage head (101) abuts against the blocking part (304); continuing to insert the salvaging rod (1), pushing the sliding support frame (3) against the blocking part (304) by the salvaging rod (1) and the salvaging head (101) to move towards the direction close to the second annular groove (202) in the release short circuit (2) until the second through hole (302) is overlapped with the second annular groove (202); at the moment, the first ball (401) moves out of the first annular groove (201) due to the movement of the sliding support frame (3), and moves towards the center direction of the sliding support frame (3) due to the extrusion of the inner wall of the release short circuit (2), and the part of the first ball (401) protrudes out of one side of the first through hole (301) close to the inner wall of the sliding support frame (3), so that the fishing head (101) is clamped between the first ball (401) and the blocking part (304) and cannot be separated; starting the driving mechanism (7), wherein a part of the driving mechanism (7) moves towards the sliding support frame (3) until a part of the driving mechanism (7) is overlapped with the second ball (402); the diameter of the driving mechanism (7) is slightly smaller than the inner diameter of the sliding support frame (3), when a part of the driving mechanism (7) moves to be overlapped with the second ball (402), a part of the second ball (402) is extruded into the second annular groove (202), the second ball (402) is clamped in the second annular groove (202) and the second through hole (302), so that the position of the sliding support frame (3) is fixed, and the connection between the fishing rod (1) and the release short circuit (2) is completed;
when the fishing rod is released, the driving mechanism (7) is started, a part of the driving mechanism (7) moves in a direction away from the sliding support frame (3) until the second ball (402) is out of contact with the driving mechanism (7), and simultaneously, the sliding support frame (3) is pulled downwards under the action of self gravity of the fishing rod (1), so that the sliding support frame (3) moves in a direction of approaching the releasing short circuit (2) to the first annular groove (201) until the first ball (401) overlaps with the first annular groove (201); the salvaging head (101) of the salvaging rod (1) moves downwards, when the salvaging head passes through the first ball (401), the first ball (401) is extruded into the first annular groove (201), and the salvaging head (101) continues downwards after passing through the first ball (401) until the salvaging head is separated from the release short circuit (2) to finish release.
2. Release device for an oilfield downhole delivery tool according to claim 1, wherein the drive mechanism (7) comprises: an output shaft (6) and a release slider (5);
one end of the output shaft (6) is connected with the release slide block (5) through a threaded structure, the other end of the output shaft is connected with a motor in the driving mechanism (7), and the motor is used for driving the output shaft (6) to rotate.
3. The release device of an oilfield downhole delivery tool of claim 2, wherein: the release short circuit (2) is provided with an observation hole (203), the observation hole (203) is positioned at one side of the second annular groove (202) away from the first annular groove (201), and the observation hole (203) is used for observing the position of the release sliding block (5).
4. The release device of an oilfield downhole delivery tool of claim 3, further comprising a positioning mechanism;
the inner part of the release short circuit (2) is matched with the outer shape of the sliding support frame (3);
the body of the release slide block (5) is a cylinder, and the positioning mechanism is used for preventing the release slide block (5) from rotating along with the output shaft (6) when the output shaft (6) rotates.
5. The release device of an oilfield downhole delivery tool of claim 4, wherein the positioning mechanism comprises: a positioning rod;
the peripheral surface of the release slide block (5) is provided with a groove (501) parallel to the axial direction of the release slide block (5), and the position of the groove (501) corresponds to the position of the second through hole (302);
the positioning rod is used for extending into the release short circuit (2) from the observation hole (203) when the output shaft (6) rotates, and is propped against the release sliding block (5) to prevent the release sliding block from rotating.
6. The release device for an oilfield downhole delivery tool of any one of claims 1-5, wherein:
the inside of first through-hole (301) with second through-hole (302), be close to release opening part of short circuit (2) center one side has respectively to first through-hole (301) and protruding edge (303) that second through-hole (302) central direction extends, protruding edge (303) are used for preventing first ball (401) with second ball (402) follow first through-hole (301) and second through-hole (302) are close to release opening part of short circuit (2) central direction one side drops.
7. The release device of the oilfield downhole delivery tool according to claim 1, wherein the inner wall of the release nipple (2) is provided with a limit part (9);
the limiting part (9) is positioned at one side of the second annular groove (202) on the inner wall of the release short circuit (2) far away from the first annular groove (201);
the limiting part (9) is used for limiting the moving position of the sliding support frame (3) so that when one end, close to the second through hole (302), of the sliding support frame (3) is in contact with the limiting part (9), the second through hole (302) and the second annular groove (202) are all overlapped.
8. The release device for an oilfield downhole delivery tool of claim 1, wherein:
the depth of the first ring groove (201) is smaller than the radius of the first ball (401);
the depth of the second ring groove (202) is smaller than the radius of the second ball (402);
the wall thickness of the sliding support frame (3) is smaller than the diameters of the first ball (401) and the second ball (402).
9. The release device of an oilfield downhole delivery tool of any one of claims 1-5, 7-8, wherein:
1-8 first through holes (301) are formed in the sliding support frame (3), the axes of all the first through holes (301) are located on the same plane perpendicular to the axis of the sliding support frame (3), and the first balls (401) are respectively arranged in each first through hole (301);
the sliding support frame (3) is provided with 1-8 second through holes (302), the axes of all the second through holes (302) are positioned on the same plane perpendicular to the axis of the sliding support frame (3), and each second through hole (302) is respectively provided with a second ball (402).
10. The method of releasing a release device for an oilfield downhole delivery tool of claim 7, comprising:
when the position of the first through hole in the release short circuit is overlapped with the position of the first annular groove, inserting a fishing rod of the downhole tool to be put into the release short circuit from an opening at one end of the release short circuit into the release short circuit and into a sliding support frame in the release short circuit;
when the salvaging head of the salvaging rod contacts with the blocking part in the sliding support frame, the salvaging rod is continuously inserted, the salvaging rod and the salvaging head push the blocking part and the sliding support frame to move towards the other end of the release short circuit until the sliding support frame contacts with the limiting part, and the second through hole is overlapped with the second annular groove;
controlling the driving mechanism to start, enabling a part of the driving mechanism to move into the sliding support frame until the driving mechanism is overlapped with the second through hole, and completing connection between the downhole tool to be put and the release short circuit;
a release step of throwing the connected downhole tool to be thrown into the well, the oilfield downhole throwing tool and the release device into the well, and stopping throwing when reaching a preset depth;
and controlling the driving mechanism to start, enabling a part of the driving mechanism to move towards the direction away from the sliding support frame until the driving mechanism is not contacted with the second ball, at the moment, the sliding support frame is pulled by the fishing rod to move downwards until the first ball is overlapped with the first annular groove, and the fishing head is separated from the release short circuit under the action of self gravity of the downhole tool to be thrown, so that the downhole tool to be thrown is thrown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111233397.5A CN113882821B (en) | 2021-10-22 | 2021-10-22 | Releasing device and releasing method for underground oil field throwing tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111233397.5A CN113882821B (en) | 2021-10-22 | 2021-10-22 | Releasing device and releasing method for underground oil field throwing tool |
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| CN113882821A CN113882821A (en) | 2022-01-04 |
| CN113882821B true CN113882821B (en) | 2024-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8534368B2 (en) * | 2006-11-15 | 2013-09-17 | Dril-Quip, Inc. | Downhole tool with slip releasing mechanism |
| US8899336B2 (en) * | 2010-08-05 | 2014-12-02 | Weatherford/Lamb, Inc. | Anchor for use with expandable tubular |
| US10704329B2 (en) * | 2018-04-03 | 2020-07-07 | Wildcat Oil Tools, LLC | Cementing whipstock assembly and running tool with releasably engaged cement tube for minimizing downhole trips during lateral drill sidetracking operations |
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| GB2099043A (en) * | 1981-05-26 | 1982-12-01 | Zwart Klaas | Running and release tool |
| CA2509468A1 (en) * | 2004-06-15 | 2005-12-15 | Bj Services Company | Release tool for coiled tubing |
| CN204152465U (en) * | 2014-09-22 | 2015-02-11 | 北京新大平雅科技有限公司 | A kind of down-hole release |
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|---|---|
| CN113882821A (en) | 2022-01-04 |
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