CN111550212A - Electric fishing tool for preset underground throttler and fishing method thereof - Google Patents
Electric fishing tool for preset underground throttler and fishing method thereof Download PDFInfo
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- CN111550212A CN111550212A CN202010522223.XA CN202010522223A CN111550212A CN 111550212 A CN111550212 A CN 111550212A CN 202010522223 A CN202010522223 A CN 202010522223A CN 111550212 A CN111550212 A CN 111550212A
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- Prior art keywords
- preset
- wall
- fishing tool
- preset underground
- fishing
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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
- 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
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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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
Abstract
The invention provides an electric fishing tool for a preset underground throttler and a fishing method thereof. The invention provides power by means of positive and negative rotation of a motor, drives the central ejector rod of the restrictor to reciprocate up and down until the central ejector rod enters the preset underground restrictor, and realizes the deblocking of the preset underground restrictor in a working state; the inner cavity of the outer barrel can be used as a storage space for lubricating grease, the lubricating grease stored in the inner cavity can be squeezed into the space between the oil pipe and the throttler in the fishing process, the fishing friction resistance is reduced, and the fishing success rate is improved.
Description
Technical Field
The invention belongs to the field of underground operation tools, and particularly relates to an electric fishing tool for a preset underground throttler and a fishing method thereof.
Background
At present, the underground throttling technology becomes one of the key technologies for developing low-pressure and low-gas production fields, is generally applied in the initial production stage of a gas well, has the important function of low-pressure gas collection, and is an important means for economically and effectively developing the low-pressure and low-gas production fields. Therefore, the preset underground throttler is widely applied in the initial stage of development of low-pressure and low-gas production fields, and is mainly characterized in that when a production tubing string is put in, a preset working barrel is connected at a proper position, the preset working barrel is put in a gas well along with the production tubing, and when production needs, the underground throttler is put in and clamped and sealed in the preset working barrel, so that the purposes of throttling and pressure reduction production of the gas well are achieved.
However, in the later stage of gas field production, because formation water is immersed into a shaft, the yield is reduced, and technological measures such as drainage and gas production need to be adopted, the choke is required to be fished out. However, in the process of exploiting the gas field, due to the reasons of underground sand production, scaling, corrosion and the like, the problems of high difficulty and low success rate of salvaging the underground throttler exist in part of wells. If the downhole choke cannot be fished in time, drainage and gas production measures such as foam drainage, speed pipe columns, plunger gas lift and the like cannot be implemented on part of the low-pressure water-producing gas well, so that the yield of the gas well is low or the well is stopped. Finally, measures such as killing a well and lifting a tubing string or lifting the tubing string under pressure are needed for taking out the choke, and the measures are expensive, and have the problems of drilling sticking and higher well control safety risks.
Disclosure of Invention
The embodiment of the invention provides an electric fishing tool for a preset underground choke and a fishing method thereof, aiming at solving the problem of high cost of the existing fishing choke; the second purpose is to solve the problem that the measure of the existing salvaging choke has the risk of jamming the drill.
In order to solve the technical problem, the invention provides an electric fishing tool for a preset underground throttler, which comprises an upper joint, an outer cylinder, a lower joint, a lower pressing cap and a working outer cylinder which are sequentially connected from top to bottom, wherein the lower end surface of the lower pressing cap is abutted against a pressing sleeve, the outer wall of the pressing sleeve is sleeved with a clamping jaw seat, and a clamping jaw is embedded in the clamping jaw seat;
a motor is installed in the outer barrel, a screw rod is connected in a hollow rotor shaft of the motor in a penetrating and rotating mode, the lower end of the screw rod is fixedly connected with a central ejector rod in a coaxial mode, a sheath is sleeved on the central ejector rod, the outer wall of the sheath is connected with the inner wall of a lower connector, and the lower connector and a lower pressing cap are fixed through a shearing pin;
the outer wall of the sheath, the inner wall of the lower pressing cap and the cavity formed by the upper end face of the pressing sleeve are internally provided with a large spring which is in a compressed state and sleeved on the sheath, the outer wall of the pressing sleeve, the inner wall of the working outer cylinder and the cavity formed by the upper end face of the clamping jaw seat are internally provided with a small spring which is in a compressed state and sleeved on the pressing sleeve, and the elasticity of the small spring is smaller than that of the large spring.
Further, solid lubricating grease is stored in the outer barrel, and is extruded into an oil pipe and a preset underground throttle under the vertical reciprocating motion of the central ejector rod.
Preferably, the lower pressing cap is of a hollow cylindrical structure, the middle section of the inner wall of the hollow cylinder extends towards the central axis along the radial direction to form a circle of annular boss, the bottom end face of the lower connector abuts against the upper table face of the annular boss, an annular cavity is formed by the lower table face of the annular boss, the inner wall of the hollow cylinder below the annular boss, the upper end face of the pressing sleeve and the outer wall of the sheath, and the large spring is compressed and placed in the annular cavity.
Further, still be equipped with in the urceolus and right the piece, right the piece cover and locate lead screw and the junction of center ejector pin, just right the piece and be located the below of fixing base, fixing base and right the piece and pass through the screw connection.
Preferably, the fixing seat is formed by splicing two semi-annular structures, and the inner wall of the spliced annular structure is connected with the screw rod in a screwing mode.
Further, the motor is a stepping motor capable of rotating forwards and backwards.
The invention also protects a salvaging method of the electric salvaging tool of the preset underground choke:
the motor is connected with the motor through a logging cable, the electric fishing tool of the preset underground throttle is placed above the preset underground throttle, then the electric fishing tool of the preset underground throttle is lifted, the clamping jaw grasps the fishing neck of the preset underground throttle, the motor drives the central ejector rod to move downwards through the lead screw, the central ejector rod is inserted into the central hole of the preset underground throttle, the throttle is forcedly unsealed, and the electric fishing tool of the preset underground throttle is lifted to lift the preset underground throttle.
Further, the jack catch preset formula downhole choke salvage neck specifically includes:
put the electronic fishing tool of preset downhole choke ware, touch the preset downhole choke ware and salvage the neck until the jack catch, the jack catch receives the ascending thrust of preset downhole choke ware and moves upwards, and the jack catch seat lasts the little spring of extrusion, and the jack catch receives the ascending thrust of salvaging the neck and opens and grasp and salvage the neck.
Further, if the preset underground throttler fails to be unsealed, the cutter pin is disconnected by automatically releasing the cutter through the rotation of the motor or upward jolting the cutter through the logging cable, the elastic force of the large spring is released, the pressing sleeve moves downwards due to the fact that the elastic force of the large spring is larger than that of the small spring, the clamping jaw seat moves downwards along with the pressing sleeve, the clamping jaw loosens the fishing neck, and at the moment, the electric fishing tool of the preset underground throttler can be taken out.
Further, in the fishing process, the central ejector rod is driven to reciprocate up and down through the positive and negative rotation of the motor, so that the solid lubricating grease is extruded to move downwards, and the inner wall of the lubricating oil pipe and the outer surface of the preset underground throttle are arranged.
The invention has the following beneficial effects:
(1) the electric fishing tool of the preset underground throttler provides power by means of positive and negative rotation of a motor, drives a central ejector rod of the throttler to reciprocate up and down until the central ejector rod enters the preset underground throttler (the position of an original throwing tool), and realizes deblocking of the preset underground throttler in a working state.
(2) The inner cavity of the outer barrel can be used as a storage space for lubricating grease, the lubricating grease stored in the inner cavity can be squeezed into the space between the oil pipe and the throttler in the fishing process, the fishing friction resistance is reduced, and the fishing success rate is improved.
(3) The electric fishing tool for the preset underground throttler has the advantages of simple structure, easy operation method and bidirectional releasing function, and can meet the requirements of gas field preset underground throttler fishing on safe, reliable and low-cost fishing technology and economy.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is an elevation view of an electric fishing tool with a pre-set downhole choke.
Fig. 2 is a partially enlarged view of a in fig. 1.
Description of reference numerals:
1. an upper joint; 2. an outer cylinder; 3. a motor; 4. a screw rod; 5. a fixed seat; 6. a righting block; 7. a lower joint; 8. shearing the pin; 9. pressing down the cap; 10. a large spring; 11. pressing the sleeve; 12. a central ejector rod; 13. a small spring; 14. a pawl seat; 15. a working outer cylinder; 16. a sheath; 17. a claw is provided.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the preset downhole choke electric fishing tool described in the present specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The first embodiment:
the invention relates to an electric fishing tool of a preset underground throttler, which comprises an upper joint 1, an outer cylinder 2, a lower joint 7, a lower pressing cap 9 and a working outer cylinder 15 which are sequentially connected from top to bottom, wherein the lower end surface of the lower pressing cap 9 is abutted against a pressing sleeve 11, a claw seat 14 is sleeved on the outer wall of the pressing sleeve 11, and a claw 17 is embedded in the claw seat 14;
a motor 3 is arranged in the outer barrel 2, a screw rod 4 is rotatably connected in a hollow rotor shaft of the motor 3 in a penetrating manner, the lower end of the screw rod 4 is coaxially and fixedly connected with a central ejector rod 12, a sheath 16 is sleeved on the central ejector rod 12, the outer wall of the sheath 16 is connected with the inner wall of a lower connector 7, and the lower connector 7 and a lower pressing cap 9 are fixed through a shearing pin 8;
wherein, a cavity formed by the outer wall of the sheath 16, the inner wall of the lower pressing cap 9 and the upper end surface of the pressing sleeve 11 is internally provided with a large spring 10 which is in a compressed state and is sleeved on the sheath 16, a cavity formed by the outer wall of the pressing sleeve 11, the inner wall of the working outer cylinder 15 and the upper end surface of the clamping jaw seat 14 is internally provided with a small spring 13 which is in a compressed state and is sleeved on the pressing sleeve 11, and the elasticity of the small spring 13 is smaller than that of the large spring 10.
The working principle of the electric fishing tool of the preset underground choke is as follows:
fishing: the motor 3 is connected with the motor through a logging cable, the electric fishing tool of the preset underground throttle is placed above the preset underground throttle, then the electric fishing tool of the preset underground throttle is lifted, the jack catch 17 catches the fishing neck of the preset underground throttle, the motor 3 drives the central ejector rod 12 to move downwards through the lead screw 4, the central ejector rod 12 is inserted into a central hole of the preset underground throttle, the throttle is forcedly unlocked, and the electric fishing tool of the preset underground throttle is lifted to lift the preset underground throttle.
And (3) deblocking process: the electric fishing tool of the preset underground throttler is lowered until the clamping jaw 17 touches the fishing neck of the preset underground throttler, the clamping jaw 17 moves upwards under the upward thrust of the preset underground throttler, the clamping jaw seat 14 continuously extrudes the small spring 13, and the clamping jaw 17 is opened under the upward thrust of the fishing neck to grasp the fishing neck.
And (3) operation after unsealing failure: if the preset underground throttler fails to be unsealed, the shearing pin 8 is disconnected by automatically releasing the wrench through the rotation of the motor 3 or upward jolting the wrench through the logging cable, the elastic force of the large spring 10 is released, the pressing sleeve 11 moves downwards because the elastic force of the large spring 10 is larger than that of the small spring 13, the clamping jaw seat 14 moves downwards along with the pressing sleeve 11, the clamping jaw 17 releases a fishing neck, and at the moment, the electric fishing tool of the preset underground throttler can be taken out.
The logging cable is connected with the motor 3 to supply power to the motor 3, the hollow rotor shaft rotates, the screw rod 4 in the hollow rotor shaft rotates, the screw rod 4 and the fixing seat 5 form a screw rod nut pair, the screw rod 4 converts the rotation motion into linear motion, and the central ejector rod 12 below the screw rod 4 also reciprocates up and down along with the linear motion until the central ejector rod 12 is inserted into the central hole of the preset underground throttler, so that the electric deblocking of the preset underground throttler is realized.
Second embodiment:
the embodiment relates to an electric fishing tool for a preset underground throttler, which comprises an upper joint 1, an outer cylinder 2, a lower joint 7, a lower pressing cap 9 and a working outer cylinder 15 which are sequentially connected from top to bottom, wherein the lower end surface of the lower pressing cap 9 is abutted to a pressing sleeve 11, a claw seat 14 is sleeved on the outer wall of the pressing sleeve 11, and a claw 17 is embedded in the claw seat 14;
a motor 3 is installed in the outer barrel 2, a screw rod 4 is rotatably connected in a hollow rotor shaft of the motor 3 in a penetrating manner, a fixed seat 5 fixed on the inner wall of the outer barrel 2 is rotatably sleeved on the screw rod 4, the lower end of the screw rod 4 is coaxially and fixedly connected with a central ejector rod 12, a sheath 16 is sleeved on the central ejector rod 12, the outer wall of the sheath 16 is connected with the inner wall of a lower connector 7, and the lower connector 7 and a lower pressing cap 9 are fixed through a shearing pin 8;
referring to fig. 2, a cavity formed by the outer wall of the sheath 16, the inner wall of the lower pressing cap 9 and the upper end surface of the pressing sleeve 11 is internally provided with a large spring 10 which is in a compressed state and is sleeved on the sheath 16, a cavity formed by the outer wall of the pressing sleeve 11, the inner wall of the working outer cylinder 15 and the upper end surface of the jaw seat 14 is internally provided with a small spring 13 which is in a compressed state and is sleeved on the pressing sleeve 11, and the elastic force of the small spring 13 is smaller than that of the large spring 10.
Solid lubricating grease is stored in the outer cylinder 2, and is extruded into an oil pipe and a preset underground throttle under the vertical reciprocating motion of the central ejector rod 12, and the method specifically comprises the following steps: in the salvaging process, the motor 3 rotates forward and backward to drive the central ejector rod 12 to move up and down in a reciprocating mode, the solid lubricating grease is extruded and slowly moves down to lubricate the salvaging tool, and when the solid lubricating grease moves below the salvaging tool, the solid lubricating grease is gradually extruded into the throttler grabbed by the clamping jaws 17 and into the oil pipe to lubricate the outer surface of the throttler and the inner wall of the oil pipe, so that the salvaging friction resistance is reduced, and the salvaging success rate is improved.
As shown in fig. 1, the lower pressing cap 9 is a hollow cylindrical structure, the middle section of the inner wall of the hollow cylinder extends towards the central axis along the radial direction to form a circle of annular boss, the bottom end face of the lower joint 7 abuts against the upper table face of the annular boss, the lower table face of the annular boss, the inner wall of the hollow cylinder below the annular boss, the upper end face of the pressing sleeve 11 and the outer wall of the sheath 16 form an annular cavity, and the large spring 10 is compressed and placed in the annular cavity.
In order to ensure the stable connection of the screw rod 4 and the central ejector rod 12 and reduce eccentric wear, a centering block 6 is further arranged in the outer barrel 2, the centering block 6 is sleeved at the joint of the screw rod 4 and the central ejector rod 12, a fixing seat 5 which is sleeved on the screw rod 4 and fixed on the inner wall of the outer barrel 2 is arranged above the centering block 6, and the fixing seat 5 is connected with the centering block 6 through screws.
In order to facilitate the disassembly and assembly, the fixing seat 5 is preferably formed by splicing two semi-annular structures, and the inner wall of the spliced annular structure is screwed with the screw rod 4.
In the present embodiment, the motor 3 is selected from a stepping motor that can rotate in the forward direction and the reverse direction, such as a ball screw stepping motor or a through-screw stepping motor.
The third embodiment:
the embodiment provides a fishing method of an electric fishing tool of a preset underground choke:
the motor 3 is connected with the motor through a logging cable, the electric fishing tool of the preset underground throttle is placed above the preset underground throttle, then the electric fishing tool of the preset underground throttle is lifted, the jack catch 17 catches the fishing neck of the preset underground throttle, the motor 3 drives the central ejector rod 12 to move downwards through the lead screw 4, the central ejector rod 12 is inserted into a central hole of the preset underground throttle, the throttle is forcedly unlocked, and the electric fishing tool of the preset underground throttle is lifted to lift the preset underground throttle.
The electric fishing tool for the preset underground throttler comprises an upper joint 1, an outer cylinder 2, a lower joint 7, a lower pressing cap 9 and a working outer cylinder 15 which are sequentially connected from top to bottom, wherein the lower end face of the lower pressing cap 9 is abutted against a pressing sleeve 11, a clamping jaw seat 14 is sleeved on the outer wall of the pressing sleeve 11, and a clamping jaw 17 is embedded in the clamping jaw seat 14;
a motor 3 is installed in the outer barrel 2, a screw rod 4 is rotatably connected in a hollow rotor shaft of the motor 3 in a penetrating manner, a fixed seat 5 fixed on the inner wall of the outer barrel 2 is rotatably sleeved on the screw rod 4, the lower end of the screw rod 4 is coaxially and fixedly connected with a central ejector rod 12, a sheath 16 is sleeved on the central ejector rod 12, the outer wall of the sheath 16 is connected with the inner wall of a lower connector 7, and the lower connector 7 and a lower pressing cap 9 are fixed through a shearing pin 8;
wherein, a cavity formed by the outer wall of the sheath 16, the inner wall of the lower pressing cap 9 and the upper end surface of the pressing sleeve 11 is internally provided with a large spring 10 which is in a compressed state and is sleeved on the sheath 16, a cavity formed by the outer wall of the pressing sleeve 11, the inner wall of the working outer cylinder 15 and the upper end surface of the clamping jaw seat 14 is internally provided with a small spring 13 which is in a compressed state and is sleeved on the pressing sleeve 11, and the elasticity of the small spring 13 is smaller than that of the large spring 10.
Fourth embodiment:
the embodiment provides a fishing method of an electric fishing tool of a preset underground choke:
the motor 3 is connected with the motor through a logging cable, the electric fishing tool of the preset underground throttle is placed above the preset underground throttle, then the electric fishing tool of the preset underground throttle is lifted, the jack catch 17 catches the fishing neck of the preset underground throttle, the motor 3 drives the central ejector rod 12 to move downwards through the lead screw 4, the central ejector rod 12 is inserted into a central hole of the preset underground throttle, the throttle is forcedly unlocked, and the electric fishing tool of the preset underground throttle is lifted to lift the preset underground throttle.
The jack catch 17 catches the fishing neck of the preset downhole choke and includes:
the electric fishing tool of the preset underground throttler is lowered until the clamping jaw 17 touches the fishing neck of the preset underground throttler, the clamping jaw 17 moves upwards under the upward thrust of the preset underground throttler, the clamping jaw seat 14 continuously extrudes the small spring 13, and the clamping jaw 17 is opened under the upward thrust of the fishing neck to grasp the fishing neck.
If the preset underground throttler fails to be unsealed, the shearing pin 8 is disconnected by automatically releasing the wrench through the rotation of the motor 3 or upward jolting the wrench through the logging cable, the elastic force of the large spring 10 is released, the pressing sleeve 11 moves downwards because the elastic force of the large spring 10 is larger than that of the small spring 13, the clamping jaw seat 14 moves downwards along with the pressing sleeve 11, the clamping jaw 17 releases a fishing neck, and at the moment, the electric fishing tool of the preset underground throttler can be taken out.
The automatic gas field pre-setting type underground throttle has the advantages that the automatic gas field pre-setting type underground throttle is salvaged safely, reliably and economically, and the gas field pre-setting type underground throttle can be salvaged in two modes.
In the salvaging process, the motor 3 rotates forwards and backwards to drive the central ejector rod 12 to reciprocate up and down to extrude the solid lubricating grease to move downwards, and the inner wall of the lubricating oil pipe and the outer surface of the preset underground throttle are arranged on the inner wall of the lubricating oil pipe.
In the salvaging process, the motor 3 rotates forward and backward to drive the central ejector rod 12 to move up and down in a reciprocating mode, the solid lubricating grease is extruded and slowly moves down to lubricate the salvaging tool, and when the solid lubricating grease moves below the salvaging tool, the solid lubricating grease is gradually extruded into the throttler grabbed by the clamping jaws 17 and into the oil pipe to lubricate the outer surface of the throttler and the inner wall of the oil pipe, so that the salvaging friction resistance is reduced, and the salvaging success rate is improved.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. The utility model provides an electronic fishing tool of preset downhole choke ware which characterized in that: the device comprises an upper joint (1), an outer cylinder (2), a lower joint (7), a lower pressing cap (9) and a working outer cylinder (15) which are sequentially connected from top to bottom, wherein the lower end face of the lower pressing cap (9) is abutted to a pressing sleeve (11), a clamping jaw seat (14) is sleeved on the outer wall of the pressing sleeve (11), and a clamping jaw (17) is embedded in the clamping jaw seat (14);
a motor (3) is installed in the outer barrel (2), a screw rod (4) is connected in a hollow rotor shaft of the motor (3) in a penetrating and rotating mode, the lower end of the screw rod (4) is coaxially and fixedly connected with a central ejector rod (12), a sheath (16) is sleeved on the central ejector rod (12), the outer wall of the sheath (16) is connected with the inner wall of the lower connector (7), and the lower connector (7) and the lower pressing cap (9) are fixed through a shearing pin (8);
a cavity formed by the outer wall of the sheath (16), the inner wall of the lower pressing cap (9) and the upper end face of the pressing sleeve (11) is internally provided with a large spring (10) which is in a compressed state and sleeved on the sheath (16), a cavity formed by the outer wall of the pressing sleeve (11), the inner wall of the working outer cylinder (15) and the upper end face of the clamping jaw seat (14) is internally provided with a small spring (13) which is in a compressed state and sleeved on the pressing sleeve (11), and the elasticity of the small spring (13) is smaller than that of the large spring (10).
2. An electric fishing tool with a preset downhole choke as claimed in claim 1, characterized in that: solid lubricating grease is stored in the outer cylinder (2), and is extruded into an oil pipe and a preset underground throttle under the vertical reciprocating motion of the central ejector rod (12).
3. An electric fishing tool with a preset downhole choke as claimed in claim 1, characterized in that: the lower pressing cap (9) is of a hollow cylindrical structure, the middle section of the inner wall of the hollow cylinder extends towards the central axis along the radial direction to form a circle of annular boss, the bottom end face of the lower connector (7) abuts against the upper table face of the annular boss, the upper end face of the inner wall of the hollow cylinder below the lower table face of the annular boss, the pressing sleeve (11) and the outer wall of the sheath (16) form an annular cavity, and the large spring (10) is compressed and arranged in the annular cavity.
4. An electric fishing tool with a preset downhole choke as claimed in claim 1, characterized in that: still be equipped with in urceolus (2) and right piece (6), right piece (6) cover and locate lead screw (4) and junction of central ejector pin (12), right the top of piece (6) and be the cover and locate lead screw (4) and be fixed in fixing base (5) of urceolus (2) inner wall, fixing base (5) and right piece (6) pass through the screw connection.
5. The preset electric fishing tool with downhole choke of claim 4, wherein: the fixing seat (5) is formed by splicing two semi-annular structures, and the inner wall of the spliced annular structure is connected with the screw rod (4) in a rotating mode.
6. An electric fishing tool with a preset downhole choke as claimed in claim 1, characterized in that: the motor (3) is a stepping motor capable of rotating forwards and backwards.
7. A fishing method of an electric fishing tool of a preset underground choke, which utilizes the electric fishing tool of the preset underground choke as claimed in any one of claims 1 to 6, and is characterized in that:
the motor (3) is connected with the motor through a logging cable, the electric fishing tool of the preset underground throttle is placed to the position above the preset underground throttle, then the electric fishing tool of the preset underground throttle is lifted, the jack catch (17) catches the fishing neck of the preset underground throttle, the motor (3) drives the central ejector rod (12) to move downwards through the screw rod (4), the central ejector rod (12) is inserted into the central hole of the preset underground throttle, the throttle is forcedly unlocked, and the electric fishing tool of the preset underground throttle is lifted, so that the preset underground throttle can be lifted.
8. A method of fishing a pre-set downhole choke electric fishing tool as claimed in claim 7, characterized in that the jaw (17) gripping the pre-set downhole choke fishing neck specifically comprises:
the electric fishing tool of the preset underground throttler is put down until the clamping jaw (17) touches the fishing neck of the preset underground throttler, the clamping jaw (17) moves upwards under the upward thrust of the preset underground throttler, the clamping jaw seat (14) continuously extrudes the small spring (13), and the clamping jaw (17) is opened under the upward thrust of the fishing neck to grasp the fishing neck.
9. A fishing method of an electric fishing tool with a preset downhole choke according to claim 7, characterized in that: if the preset underground throttler fails to be unsealed, the cutter pin (8) is disconnected by automatically releasing the cutter through the rotation of the motor (3) or the cutter is upward shocked through a logging cable, the elastic force of the large spring (10) is released, the pressing sleeve (11) moves downwards because the elastic force of the large spring (10) is greater than that of the small spring (13), the clamping jaw seat (14) moves downwards along with the pressing sleeve (11), the clamping jaw (17) loosens the fishing neck, and at the moment, the electric fishing tool of the preset underground throttler can be taken out.
10. A fishing method of an electric fishing tool with a preset downhole choke according to claim 7, characterized in that: in the salvaging process, the central mandril (12) is driven to reciprocate up and down by the positive and negative rotation of the motor (3) to extrude the solid lubricating grease to move downwards, and the inner wall of the lubricating oil pipe and the outer surface of the preset underground throttle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010522223.XA CN111550212A (en) | 2020-06-10 | 2020-06-10 | Electric fishing tool for preset underground throttler and fishing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010522223.XA CN111550212A (en) | 2020-06-10 | 2020-06-10 | Electric fishing tool for preset underground throttler and fishing method thereof |
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| CN111550212A true CN111550212A (en) | 2020-08-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112096332A (en) * | 2020-08-21 | 2020-12-18 | 中石化石油工程技术服务有限公司 | Radioactive source fishing device |
| CN112943142A (en) * | 2021-01-12 | 2021-06-11 | 中国石油天然气股份有限公司 | Device and method for unsealing restrictor through eccentric vibration |
| CN113294128A (en) * | 2021-06-23 | 2021-08-24 | 中国石油天然气股份有限公司长庆油田分公司第三采气厂 | Electric control throttle for gas well |
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2020
- 2020-06-10 CN CN202010522223.XA patent/CN111550212A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112096332A (en) * | 2020-08-21 | 2020-12-18 | 中石化石油工程技术服务有限公司 | Radioactive source fishing device |
| CN112096332B (en) * | 2020-08-21 | 2022-05-06 | 中石化石油工程技术服务有限公司 | Radioactive source fishing device |
| CN112943142A (en) * | 2021-01-12 | 2021-06-11 | 中国石油天然气股份有限公司 | Device and method for unsealing restrictor through eccentric vibration |
| CN113294128A (en) * | 2021-06-23 | 2021-08-24 | 中国石油天然气股份有限公司长庆油田分公司第三采气厂 | Electric control throttle for gas well |
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