CN111255405A - Perforation releasable fishing head and method for releasing instrument by adopting perforation releasable fishing head - Google Patents
Perforation releasable fishing head and method for releasing instrument by adopting perforation releasable fishing head Download PDFInfo
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- CN111255405A CN111255405A CN202010192487.3A CN202010192487A CN111255405A CN 111255405 A CN111255405 A CN 111255405A CN 202010192487 A CN202010192487 A CN 202010192487A CN 111255405 A CN111255405 A CN 111255405A
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- slip
- grapple
- connecting seat
- push rod
- piston push
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- 238000000034 method Methods 0.000 title claims description 14
- 230000003578 releasing effect Effects 0.000 title claims description 11
- 230000009471 action Effects 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 abstract description 5
- 239000004576 sand Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 2
- 241001023788 Cyttus traversi Species 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
Abstract
The invention discloses a perforation releasable fishing head which comprises an outer shell, wherein a piston push rod, a slip connecting seat and a slip are sequentially arranged in the outer shell from top to bottom; the piston push rod is sequentially sleeved with a disc spring, a limiting sleeve and a grapple from top to bottom, and the limiting sleeve is fixedly connected with the outer shell. The ground is used for pressing, the piston push rod is made to move downwards, the grapple is connected with the slip connecting seat in a hooking mode, the grapple, the slip connecting seat and the slip are connected into a whole, after pressing is stopped, the piston push rod moves upwards under the action of the disc spring, the grapple drives the slip to move upwards, and the slip is separated from the halter. When the fishing head tool is not required to be released, the bridle can be gripped safely and reliably by normal fishing; when the instrument needs to be released, the ground coiled tubing is pressed to enable the mechanism to act to release the instrument.
Description
Technical Field
The invention relates to the technical field of petroleum logging perforation operation, in particular to a releasable fishing head for perforation and a method for releasing an instrument by using the releasable fishing head.
Background
The perforation releasable fishing head is a special tool for fishing and grabbing the bridle when fishing operation is carried out after the perforation operation instrument is blocked. At present, the fishing heads commonly used for operation mainly comprise a slip retractable fishing head and a basket type fishing head, and the two fishing heads have great defects in the using process; the retractable type tool string has the advantages that due to the structural characteristics of the retractable type tool string, when the tool string is hung and clamped in the lifting process, the tool string moves longitudinally, the tool string is loosened by the clamping piece, falls into a well and needs to be salvaged again, and the time and labor are wasted, so that the operation efficiency is influenced; the structural design of the basket type fishing head can ensure that the instrument is firmly grabbed and cannot fall into the well again when the instrument is grabbed, but the tool does not have a releasing function when the lifting force of the coiled tubing is limited to reach the upper limit, and also has great operation risk.
Disclosure of Invention
The invention aims to provide a perforating releasable fishing head and a method for releasing an instrument by adopting the perforating releasable fishing head.
The invention is realized by the following technical scheme:
a perforation releasable fishing head comprises an outer shell, wherein a piston push rod, a slip connecting seat and a slip are sequentially arranged in the outer shell from top to bottom;
the tail part of the piston push rod is provided with a pressure regulating valve;
a disc spring, a limiting sleeve and a grapple are sequentially sleeved on the piston push rod from top to bottom, one end of the disc spring is fixedly connected to the piston push rod, the other end of the disc spring is fixedly connected to the limiting sleeve, and the limiting sleeve is fixedly connected with the outer shell;
the upper end of the grapple is connected to the piston push rod, the lower end of the grapple is provided with a plurality of hooks, the outer circular surface of the slip connecting seat is provided with a grabbing groove, when the pressure is released, the hooks are clamped at the grabbing groove, and the grapple is connected with the slip connecting seat;
the upper end of the outer shell is connected with the coiled tubing.
Furthermore, a pre-tightening spring is arranged between the grapple and the slip connecting seat, the pre-tightening spring is sleeved on the piston push rod, one end of the pre-tightening spring is connected to the grapple, and the other end of the pre-tightening spring is connected to the slip connecting seat.
Furthermore, each hook is provided with a threaded hole, and the outer shell and the lower end of the limiting sleeve are provided with a plurality of hole sites corresponding to the threaded holes.
Furthermore, a plug is arranged on each hole site.
Furthermore, the upper end of the limit sleeve is fixedly connected with the outer shell through a screw, and the lower end of the limit sleeve is fixedly connected with the limit sleeve through a plug.
Furthermore, the pressure regulating valve comprises a main valve body, a regulating screw and a locking nut, wherein the main valve body is provided with an axial through hole and a radial hole, the axial through hole and the radial hole penetrate through the main valve body, one end of the regulating screw extends into the axial through hole, and the other end of the regulating screw is in threaded connection with the locking nut.
Further, the upper end junction of shell body is equipped with the adapter that is used for connecting coiled tubing, and adapter and shell body threaded connection are equipped with the sealing washer in piston push rod and the radial cooperation department of adapter.
Furthermore, a circulation hole is formed in the center of the piston push rod, a through hole is formed in the center of the slip connecting seat, and the circulation hole is communicated with the through hole.
Further, the lower extreme inner wall of shell body adopts the conical surface structure, including the first conical surface and the second conical surface that are connected, the diameter of first conical surface diminishes from supreme gradually down, and the second conical surface is used for holding the slips, and the diameter of second conical surface is supreme grow gradually from down.
The releasing instrument method adopting the perforation releasable fishing head comprises the following steps:
s1, using the coiled tubing to apply thrust downwards to separate the outer shell from the slips;
s2 is then pressed to a set release pressure value through the ground, the piston push rod moves downwards to drive the grapple to move downwards, the disc spring and the pre-tightening spring are compressed, the grapple overcomes the pre-tightening spring force to move downwards, the grapple moves downwards to the slip connecting seat, and the hook at the lower end of the grapple hooks the grabbing groove of the slip connecting seat;
s3, stopping pressing, moving the piston push rod upwards under the action of the restoring force of the disc spring to drive the slip connecting seat and the slip to be pulled upwards, and releasing the instrument by the slip;
s4 pulling the outer casing with coiled tubing, raising the perforating releasable fishing head to the surface.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a perforating releasable fishing head.A slip, a slip connecting seat, a grapple, a piston push rod and a pressure regulating valve are arranged in an outer shell, the slip connecting seat, the grapple, the piston push rod and the pressure regulating valve are matched with a continuous oil pipe for use and are used for fishing a perforating instrument string, the slip is connected with the slip connecting seat, the slip is axially and fixedly connected while the radial elastic shrinkage of the slip is not influenced, and when the fishing head descends to the position of an instrument to be fished, the instrument is captured by the slip; the rear half part is mainly used for realizing release action, is provided with a piston pull rod and is mainly used for realizing mechanism linkage under the action of pressure, a plurality of disc springs are sleeved on a piston push rod, the disc springs and the grappling hooks are separated through a limiting sleeve, in addition, the grappling hooks are structurally provided with hooks, the outer circular surface of the slip connecting seat is provided with a grabbing groove, when the pressure is released, the hooks are clamped at the grabbing groove, the grappling hooks, the slip connecting seat and the slips are connected into a whole, the upward movement of the grappling hooks can drive the slips to move upward, so that the slips are separated from a salvage; the tail part of the piston push rod is provided with a pressure release regulating valve which is mainly used for regulating the magnitude of the pressure release pressure, and when the pressure release is not needed, the bridle can be grasped safely and reliably as much as possible by normal fishing; when the instrument needs to be released, the ground coiled tubing is pressed to enable the mechanism to act to release the instrument.
Furthermore, a pre-tightening spring is arranged between the grapple and the slip connecting seat and used for applying a downward pre-tightening force to the slip all the time so as to ensure that the slip can firmly grasp an instrument to be salvaged.
Furthermore, each hook is provided with a threaded hole at a corresponding position, and corresponding hole site features are arranged on the corresponding fixed sleeve and the corresponding outer shell, so that the slip is mainly used for manually resetting the slip on the ground.
Furthermore, install the plug on every hole site, after the instrument went into the well, can prevent that big granule foreign matter in the pit from getting into the grapple position, influencing the release action, when needs reset, demolish the plug, screw in the hole site department of correspondence, just can make slips connecting seat and grapple throw off.
Further, the design has the circulation hole in the middle of the piston push rod, and slips connecting seat center is opened there is the through-hole, and the circulation hole communicates with the through-hole, and when the slips department had the sand setting, from the mud route through-hole flow direction slips of the downthehole inflow of circulation, can wash the sand setting on the slips, prevents that there is the sand setting influence catching of instrument in instrument anterior segment slips department.
According to the method for releasing the instrument by adopting the perforation releasable fishing head, disclosed by the invention, the piston push rod is driven to descend by pressing on the ground, the grapple is driven to descend, the grapple is hooked with the slip connecting seat, the grapple, the slip connecting seat and the slip are connected into a whole, and the linkage of the mechanism is realized. After the pressing is stopped, under the acting force of the disc spring, the piston push rod moves upwards, the grapple moves upwards, the slips are driven to move upwards, and the slips are separated from the headstall. The release process of the fishing head can be executed only by pressing the ground under the control of ground workers, and the slip can not be automatically separated from the instrument due to the longitudinal movement of the instrument string.
Drawings
FIG. 1 is a schematic structural view of a perforating releasable fishing head of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic structural view of a pressure regulating valve of the present invention;
FIG. 5 is a schematic illustration of the configuration of the perforating releasable fishing head of the present invention during a fishing grip;
fig. 6 is a schematic structural view of the perforating releasable fishing head of the invention when the pressure is released.
The hydraulic clamping device comprises a shell 1, a slip 2, a slip 3, a slip connecting seat, a pre-tightening spring 4, a grapple 5, a limiting sleeve 6, a piston push rod 7, an adapter 8, a connecting screw 9, a disc spring 10, a pressure regulating valve 11, a locking nut 11-1, an adjusting screw 11-2, a main valve body 11-3, a first screw 12, a second screw 13, a plug 14, a sealing ring 15, a grabbing groove 16, a circulating hole 17 and a horse head 18.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in figure 1, the perforating releasable fishing head comprises an outer shell 1, slips 2, a slip connecting seat 3, a grapple 5, a limiting sleeve 6, a piston push rod 7 and a disc spring 10, wherein the slips 2, the slip connecting seat 3, the grapple 5, the limiting sleeve 6 and the piston push rod 7 are installed in the outer shell 1. Piston push rod 7, slips connecting seat 3 and slips 2 are from last to connecting gradually down, piston push rod 7 and 3 threaded connection of slips connecting seat, slips 2 and 3 fixed connection of slips connecting seat.
As shown in fig. 1, the setting of shell body 1 mainly is used for bearing other functional parts of installation, and the lower extreme is interior cone structure characteristic, is used for realizing the function of catching the instrument with the outer cone structure cooperation of elasticity slips 2, and the lower extreme inner wall of shell body 1 adopts the conical surface structure, including the first conical surface and the second conical surface that are connected, the diameter of first conical surface diminishes from supreme gradually down, and the second conical surface is used for holding slips 2, and the diameter of second conical surface diminishes from supreme gradually down.
The upper end of grapple 5 is through first screw 12 fixed connection on piston push rod 7, and the lower extreme of grapple 5 is equipped with 8 colludes, is equipped with on the outer disc of slips connecting seat 3 and snatchs groove 16, when suppressing the release, colludes the card and snatchs groove 16 department, and grapple 5 is connected with slips connecting seat 3 for snatch pull-up tile 2 when releasing.
Preferably, the corresponding position on each hook is designed with a threaded hole of M5, and the corresponding position on the stop collar 6 and the outer shell 1 is also provided with 8 corresponding hole site characteristics, which is mainly used for the design of the ground manual reset slip 2.
Be used for being provided with 8 corresponding plug 14 in the 8 corresponding hole sites of manual release on the shell body 1, prevent that big granule foreign matter in the pit from getting into 5 positions of grapple, influencing the release action.
A cylindrical pre-tightening spring 4 is arranged behind the slip connecting seat 3 and used for applying a downward pre-tightening force to the slip 2 all the time to ensure that the slip can firmly grasp an instrument to be salvaged. The pre-tightening spring 4 is sleeved on the piston push rod 7, one end of the pre-tightening spring 4 is fixedly connected to the grapple 5, and the other end of the pre-tightening spring is fixedly connected to the slip connecting seat 3.
The upper half part of the fishing head is mainly used for realizing release action, a piston push rod 7 is arranged on the piston push rod 7, a disc spring 10, a limiting sleeve 6 and a grapple 5 are sequentially sleeved on the piston push rod 7 from top to bottom, one end of the disc spring 10 is fixedly connected to the piston push rod 7, the other end of the disc spring is fixedly connected to the limiting sleeve 6, and the limiting sleeve 6 is fixedly connected with the outer shell 1 and is mainly used for realizing mechanism linkage under the action of pressure.
As shown in fig. 2, the slips 2 are connected to the slip coupling block 3 by 6 coupling screws 9, which fixedly connect the slips 2 in the axial direction without affecting the radial elastic contraction of the slips.
As shown in fig. 3, the position-limiting sleeve 6 is fixedly connected with the outer shell 1 through 4 second screws 13.
The design of 7 afterbody of piston push rod has pressure regulating valve 11, and its main effect is used for suppressing the regulation of release pressure size, and the design has circulation hole 17 in the middle of the piston push rod 7 in addition, and open at slips connecting seat center has the through-hole, and circulation hole 17 and through-hole intercommunication when slips department has the sand setting, from circulation hole 17 in the mud route through-hole flow direction slips of inflow, can wash the sand setting on the slips, prevent that tool anterior segment slips 2 department from having the sand setting to influence catching of instrument.
As shown in FIG. 4, the pressure regulating valve 11 includes a main valve body 11-3, a regulating screw 11-2 and a lock nut 11-1, the main valve body 11-3 is provided with an axial through hole and a radial hole, the axial through hole and the radial hole penetrate through, one end of the regulating screw 11-2 extends into the axial through hole, and the other end is in threaded connection with the lock nut 11-1. The adjusting method of the pressure adjusting valve 11 is that a hexagonal wrench is used for adjusting the position of an adjusting screw 11-2, when the adjusting screw 11-2 is screwed into an axial through hole, a part of a radial hole is blocked, when the adjusting screw 11-2 is gradually screwed in, the radial hole is finally blocked, the throttling effect is achieved, the flow of entering slurry is adjusted through a throttling method, the pressure is adjusted, the pressure can be pressed on the ground for adjustment, and after the adjustment is finished, a locking nut 11-1 is used for locking and fixing.
The most tail design of instrument has adapter 8, and shell body 1 passes through adapter 8 and oil pipe threaded connection, is equipped with sealing washer 15 in piston push rod 7 and the radial cooperation department of adapter 8.
The operation implementation process of the perforating releasable fishing head comprises the following steps:
1) fishing action (see fig. 5):
the ground is started to be pressurized and circulated when the fishing head reaches a fishing position, the piston push rod 7 moves downwards during the pressurizing and circulating, the disc spring 10 is compressed and continuously moves downwards when the pressure is suddenly increased (not more than 2.5Mpa), which indicates that the target position, namely a capturing point of the bridle 18, is reached, the pressurizing and circulating are stopped at the moment, a winch of a continuous oil pipe vehicle on the ground downwards applies thrust of about 400kgf to ensure that the slip 2 completely captures the instrument, namely the bridle 18, the continuous oil pipe winch pulls up an oil pipe, the tension of the oil pipe is monitored by a special sensor, when the tension rises, the fishing head captures the instrument, the oil pipe is started to be pulled up, and the instrument is fished out of the ground.
2) Releasing action:
if the instrument is completely clamped and cannot be fished, the instrument needs to be released, at the moment, a continuous oil pipe needs to apply a pushing force of about 3000kgf downwards, so that the fishing outer shell 1 is separated from the slips 2, then the fishing outer shell is beaten to a set release pressure value through the ground, the piston push rod 7 continues to descend to drive the grapple 5 to descend, the disc spring 10 and the pre-tightening spring 4 are compressed, the grapple 5 overcomes the pre-tightening spring force to move downwards, the grapple 5 can move downwards to the slip connecting seat 3, the hook at the lower end of the grapple 5 can hook the grabbing groove 16 of the slip connecting seat 3, after the beating is stopped, under the restoring force of the disc spring 10, the piston push rod 7 moves upwards to drive the slip connecting seat 3 and the slips 2 to be pulled upwards, the slips 2 and the bridle head 18 can be released (as shown in fig. 6), and then the continuous oil pipe pulls the outer shell 1 to lift.
3) Resetting the tool:
if the perforation releasable fishing head is released, the slips 2 are pulled upwards (as shown in fig. 6), the lower end of the grapple 5 is aligned with the position of the plug 14, the slips 2 needs to be reset, and the slip connecting seat 3 needs to be disconnected from the grapple 5 to reset, which is realized by the following specific method:
firstly, the special reset tool joint is connected and installed on the tail part of a piston push rod, the tool is screwed for a half circle after propping against a piston push rod 7, then 8 plug bolts 14 are removed, 8M 5X25 screws are installed on a grapple 5 exposed after the plug bolts 14 are removed, each screw is uniformly screwed by a spanner until the sound of the slip 2 which is separated is heard, 8M 5X25 screws are removed, the special reset tool joint is removed, and the tool reset is completed.
Claims (10)
1. The perforating releasable fishing head is characterized by comprising an outer shell (1), wherein a piston push rod (7), a slip connecting seat (3) and a slip (2) are sequentially arranged in the outer shell (1) from top to bottom, the piston push rod (7) is connected with the slip connecting seat (3), and the slip (2) is fixedly connected with the slip connecting seat (3);
the tail part of the piston push rod (7) is provided with a pressure regulating valve (11);
a disc spring (10), a limiting sleeve (6) and a grapple (5) are sequentially sleeved on the piston push rod (7) from top to bottom, one end of the disc spring (10) is fixedly connected to the piston push rod (7), the other end of the disc spring is fixedly connected to the limiting sleeve (6), and the limiting sleeve (6) is fixedly connected with the outer shell (1);
the upper end of the grapple (5) is connected to the piston push rod (7), the lower end of the grapple (5) is provided with a plurality of hooks, the outer circular surface of the slip connecting seat (3) is provided with a grabbing groove (16), when the slip connecting seat is pressed and released, the hooks are clamped at the grabbing groove (16), and the grapple (5) is connected with the slip connecting seat (3);
the upper end of the outer shell (1) is connected with a coiled tubing.
2. The perforating releasable fishing head according to claim 1, characterized in that a pre-tightening spring (4) is arranged between the grapple (5) and the slip connecting seat (3), the pre-tightening spring (4) is sleeved on the piston push rod (7), one end of the pre-tightening spring (4) is connected to the grapple (5), and the other end is connected to the slip connecting seat (3).
3. Perforation releasable fishing head according to claim 1, wherein each hook is provided with a threaded hole, and a plurality of holes corresponding to the threaded holes are provided on the outer casing (1) and at the lower end of the stop collar (6).
4. Perforation releasable fishing head according to claim 3, characterized in that a plug (14) is mounted at each hole site.
5. Perforation releasable fishing head according to claim 4, wherein the upper end of the stop collar (6) is fixedly connected to the outer casing (1) by means of screws, and the lower end is fixedly connected to the stop collar (6) by means of a plug (14).
6. Perforation releasable fishing head according to claim 1, characterised in that the pressure regulating valve (11) comprises a main valve body (11-3), an adjusting screw (11-2) and a locking nut (11-1), the main valve body (11-3) is provided with an axial through hole and a radial hole, the axial through hole and the radial hole are through, one end of the adjusting screw (11-2) extends into the axial through hole, and the other end is in threaded connection with the locking nut (11-1).
7. Perforation releasable fishing head according to claim 1, characterized in that the upper end connection of the outer casing (1) is provided with a coupling (8) for connecting coiled tubing, the coupling (8) is in threaded connection with the outer casing (1), and a sealing ring (15) is provided at the radial fit of the piston rod (7) and the coupling (8).
8. The perforating releasable fishing head according to claim 1, characterized in that the piston push rod (7) is provided with a circulation hole (17) in the center, the slip connecting seat (3) is provided with a through hole in the center, and the circulation hole (17) is communicated with the through hole.
9. A perforating releasable fishing head according to claim 1, characterized in that the inner wall of the lower end of the outer casing (1) is of a conical structure comprising a first conical surface and a second conical surface which are connected, the diameter of the first conical surface is gradually reduced from bottom to top, the second conical surface is used for accommodating the slips (2), and the diameter of the second conical surface is gradually increased from bottom to top.
10. A method of using a delivery apparatus for a perforating releasable fishing head as claimed in any of claims 1 to 9, characterised by the steps of:
s1, applying thrust downwards by using a coiled tubing to separate the outer shell (1) from the slips (2);
s2 is pressed to a set release pressure value through the ground, the piston push rod (7) moves downwards to drive the grapple (5) to move downwards, the disc spring (10) and the pre-tightening spring (4) are compressed, the grapple (5) overcomes the pre-tightening spring force to move downwards, the grapple (5) moves downwards to the slip connecting seat (3), and a hook at the lower end of the grapple (5) hooks a grabbing groove (16) of the slip connecting seat (3);
s3, stopping pressing, moving the piston push rod (7) upwards under the action of the restoring force of the disc spring (10) to drive the slip connecting seat (3) and the slip (2) to pull upwards, and releasing the instrument by the slip (2);
s4 pulling the outer casing (1) with coiled tubing, raising the perforating releasable fishing head to the surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010192487.3A CN111255405B (en) | 2020-03-18 | 2020-03-18 | Perforation releasable fishing head and method for releasing instrument by using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010192487.3A CN111255405B (en) | 2020-03-18 | 2020-03-18 | Perforation releasable fishing head and method for releasing instrument by using same |
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| CN111255405B CN111255405B (en) | 2024-07-23 |
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| CN113153201A (en) * | 2021-06-15 | 2021-07-23 | 山东辛丁技术有限公司 | Fishing tool for downhole operation |
| CN116066004A (en) * | 2022-06-10 | 2023-05-05 | 中国石油天然气集团有限公司 | Fishing device |
| CN117404082A (en) * | 2023-11-15 | 2024-01-16 | 南阳市天达同兴石油技术有限公司 | Logging robot and logging method |
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| CN211777308U (en) * | 2020-03-18 | 2020-10-27 | 西安石竹能源科技有限公司 | Perforating releasable fishing head |
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| CN103527128A (en) * | 2012-07-04 | 2014-01-22 | 中国石油天然气股份有限公司 | Fishing tool for natural gas exploitation underground throttler and operation method thereof |
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| CN113153201A (en) * | 2021-06-15 | 2021-07-23 | 山东辛丁技术有限公司 | Fishing tool for downhole operation |
| CN116066004A (en) * | 2022-06-10 | 2023-05-05 | 中国石油天然气集团有限公司 | Fishing device |
| CN116066004B (en) * | 2022-06-10 | 2024-01-26 | 中国石油天然气集团有限公司 | Fishing device |
| CN117404082A (en) * | 2023-11-15 | 2024-01-16 | 南阳市天达同兴石油技术有限公司 | Logging robot and logging method |
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| CN111255405B (en) | 2024-07-23 |
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