CN211950407U - Self-releasing overshot of underground choke - Google Patents

Abstract

The utility model provides a choke ware is from releasing a overshot in pit for solve salvage the neck and easily appear the fracture, salvage the neck and can't snatch, the choke ware grabs and lifts motionless, the unable deblocking of choke ware and the serious scheduling problem of choke ware top hydrops. The utility model discloses a top connection, salvage neck and barrel, salvage the lower part of neck and the upper portion swing joint of barrel, the inside of barrel is equipped with piston rod and fish slips, and the one end of piston rod is passed and is salvaged the neck and be connected the fish slips with top connection, the other end, the sub-unit connection of barrel has a section of thick bamboo shoes. The utility model discloses can be used for the processing of the object in the well object salvage and other complicated accidents in the well such as the neck fracture, salvage neck can't use specialized tool to snatch in the well, easy and simple to handle, application range is wide, salvages object size range extensively, has very strong practicality.

Description

Self-releasing overshot of underground choke

Technical Field

The utility model relates to a fishing tool technical field in the pit, concretely relates to choke ware is from releasing a fishing barrel in pit.

Background

In natural gas exploitation, in order to meet the requirements of gas production pressure reduction, yield limitation and energy conservation, a slip type throttling device is installed under a gas well. The throttling device realizes the throttling and pressure reduction of natural gas in a shaft by means of steel wire descending, slip positioning, rubber cylinder sealing and air nozzle production allocation. In field application, in order to meet production requirements, the yield of a gas well needs to be adjusted, or in order to fully exert the capacity of the gas well, the throttler needs to be fished from a shaft in the later production stage of the gas well. At present, a slip type choke salvaging tool is commonly used, and along with the long-time use of the choke, a sealing rubber cylinder can generate permanent deformation, so that the friction force between the rubber cylinder and a well wall is increased, the lifting tension in the salvaging process is increased, and underground accidents are easily caused. Choke downhole several situations typically arise: (1) fishing the fracture of the neck: the slip type underground throttleer is roughly divided into two types, namely an upward-pulling deblocking type downhole throttleer and a downward-striking deblocking type downhole throttleer, and a fishing neck is mostly broken in the downward-striking deblocking slip type downhole throttleer; (2) salvage the neck and can't snatch: the fishing neck can not be grabbed mostly due to sand burying, foreign matters above the throttler and the like; (3) the throttle is held and lifted up immovably: the choke is fixedly lifted, the choke is mainly a downward-striking unblocking underground choke, and due to the structural reason, the fixed force of the slip fixing part of the choke is weak, and the slip is easily broken by long-term downward striking, so that the slip falls off and is broken, secondary setting of the choke is caused in the lifting process, and the choke is immovably lifted; (4) and (3) the product cannot be unsealed: the gas well underground throttleer works in a high-temperature, high-salinity and high-corrosion state for a long time, and a deblocking mechanism fails due to serious corrosion of a throttleer body; (5) shaft effusion: liquid accumulation above the throttler is serious in the long-term production process of the gas well.

SUMMERY OF THE UTILITY MODEL

To foretell salvage the easy fracture of neck, salvage the neck and can't snatch, the choke holder is grabbed and is lifted motionless, the unable deblocking of choke holder and the serious scheduling problem of choke holder top hydrops, the utility model provides a downhole choke holder is from releasing a salvage section of thick bamboo can be used for the processing of the object salvage and other complicated accidents in the well such as the well junk, the well instrument salvage the neck fracture in the well, salvage the neck and can't use specialized tool to snatch, easy and simple to handle, application range is wide, salvages object size range extensively, has very strong practicality.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a downhole choke ware is from releasing fishing barrel, includes top connection, salvage neck and barrel, salvages the lower part of neck and the upper portion swing joint of barrel, and the inside of barrel is equipped with piston rod and fish slips, and the one end of piston rod passes and salvages the neck and be connected with the top connection, the other end is connected the fish slips, the sub-unit connection of barrel has a section of thick bamboo shoes.

The fishing neck is in plug-in connection with the barrel, and the plug-in part of the fishing neck is matched with the plug-in part of the barrel through a conical surface.

One end of the piston rod is connected with the upper joint through a cylindrical pin, and the other end of the piston rod is connected with a piston rod sleeve through a cylindrical pin.

And a pressing cap used for connecting the fish dropping slips is arranged on the piston rod sleeve.

The fish-falling slips are provided with positioning blocks and springs, and protruding rings which are integrally formed with the fish-falling slips are arranged between the positioning blocks and the springs.

And a check thread is arranged between the fish falling slips and the positioning block.

The utility model adopting the structure utilizes the matching of the cylinder body and the cylinder shoe to form a reducer cylinder structure with the inner diameter gradually reduced from bottom to top, so that the descending fish slip can be firmly locked to enter the object inside, thereby completing the fishing process; the utility model discloses can be used for the processing of the object in the well object salvage and other complicated accidents in the well such as the neck fracture, salvage neck can't use specialized tool to snatch in the well, easy and simple to handle, application range is wide, salvages object size range extensively, has very strong practicality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a sectional view of the upper half structure of the present invention;

fig. 2 is the structure cross-sectional view of the lower half part of the utility model.

In the figure, 1 is a fishing neck, a barrel body 2, a barrel shoe 3, an upper joint 4, a piston rod 5, a piston rod sleeve 6, a pressing cap 7, a positioning block 8, a cylindrical pin 9, a retaining wire 10, a spring 11 and a fish dropping slip 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

The utility model provides a choke ware is from releasing fishing barrel in pit, as shown in fig. 1, including top connection 4, salvage neck 1 and barrel 2, salvage neck 1's lower part and barrel 2's upper portion swing joint, top connection 4 is used for the connecting tool cluster, salvage neck 1 and barrel 2's inside is hollow structure, barrel 2's inside is equipped with piston rod 5 and fish slips 12, and the one end of piston rod 5 is passed and is salvaged neck 1 and be connected with top connection 4, fish slips 12 is connected to the other end, fish slips 12's bottom opening just has the function of opening and shutting, mainly used for snatching the salvage. Salvage neck 1 and barrel 2 plug-in connection, salvage the lower part of neck 1 and peg graft in barrel 2, when not taking off the hand, salvage the lower part of neck 1 and not insert completely with in barrel 2, have certain space, the size in this space is decided by the degree of depth that fish slips 12 set up inside barrel 2, when taking off the hand, fix barrel 2, hit top connection 4 down, make the lower part of salvaging neck 1 insert completely with in barrel 2, piston rod 5 will be under the drive of top connection 4 downstream, and give fish slips 12 a decurrent effort, make fish slips 12 by ejecting barrel 2, realize that fish slips 12 is automatic to go upward, reach the mesh of taking off the hand. Furthermore, the inserting parts of the fishing neck 1 and the barrel body 2 are matched by conical surfaces, the conical surfaces play roles of locking and guiding, namely when the upper joint 4 is knocked down, the lower part of the fishing neck 1 can move downwards along the conical surfaces and enter the barrel body 2, the conical surfaces are tightly matched with the barrel body 2, and the fishing neck 1 and the barrel body 2 can be connected more stably and firmly.

One end of the piston rod 5 is connected with the upper joint 4 through a cylindrical pin 9, the other end of the piston rod is connected with a piston rod sleeve 6 through the cylindrical pin 9, and the cylindrical pin 9 plays a role in connection. The fishing device is characterized in that a pressing cap 7 used for being connected with a fish slip 12 is arranged on the piston rod sleeve 6, the pressing cap 7 can be connected with the fish slip 12 specifically, the pressing cap 7 is arranged in the piston rod sleeve 6, when a fishing process needs to be carried out, the piston rod 5 moves downwards by downwards striking the upper joint 4, the cylindrical pin 9 is sheared off by matching the piston rod 5 and the piston rod sleeve 6, the piston rod 5 gives a downward acting force to the pressing cap 7 at the moment, the fish slip 12 is ejected out, the fish slip 12 automatically ascends, and the purpose of carrying out the fishing is achieved.

The fish-falling slips 12 are provided with positioning blocks 8 and springs 11, and protruding rings which are integrally formed with the fish-falling slips 12 are arranged between the positioning blocks 8 and the springs 11. The positioning block 8 is in threaded connection with the fish falling slips 12, namely, the fish falling slips 12 are provided with external threads, the positioning block 8 is provided with internal threads, and the fish falling slips 12 are in threaded connection with the positioning block 8. Furthermore, a retaining wire 10 is arranged between the fish slip 12 and the positioning block 8, and the retaining wire 10 is used for preventing the connection part of the fish slip 12 and the positioning block 8 from loosening in the using process. When the fish-falling slips are taken off the hand, the fish-falling slips 12 automatically move upwards, the positioning blocks 8 and the springs 11 also move upwards, in the process, the protruding rings can be abutted against the springs 11, meanwhile, the springs 11 can provide certain moving space for the fish-falling slips 12, and the inner diameter of the fish-falling slips 12 gradually increases when the fish-falling slips 12 move upwards, so that the fish-falling objects and tools in the well can be better grabbed.

The lower part of the barrel body 2 is connected with a barrel shoe 3, the barrel body 2 and the barrel shoe 3 are formed by one-time lathe processing, the barrel shoe 3 is connected with the barrel body 2 to form a reducer barrel structure with gradually reduced inner diameter from bottom to top, the inner diameter of the uppermost part of the barrel is the largest, the inner diameter of the barrel shoe 3 is the smallest, when fishing, an upper joint 4 is connected with a tool string and is lowered into an object needing fishing in a well by using a steel wire, then the upper joint 4 is knocked down to enable the fish dropping slips 12 to ascend, when a fishing object enters the fish dropping slips 12 and then starts to ascend, at the moment, the fish dropping slips 12 descend and are matched with the reducer barrel structure formed by the barrel shoe 3 and the barrel body 2, as the object in the fish dropping slips 12 can generate a downward acting force according to the self gravity and is matched with the characteristic that the inner diameter of the reducer barrel structure is reduced from top to bottom, the descending fish dropping slips 12, simple operation, wide application range and wide range of the size of the salvaged object.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a well choke ware is from releasing overshot which characterized in that: including top connection (4), salvage neck (1) and barrel (2), salvage the lower part of neck (1) and the upper portion swing joint of barrel (2), the inside of barrel (2) is equipped with piston rod (5) and fish slips (12), and the one end of piston rod (5) is passed and is salvaged neck (1) and be connected with top connection (4), the fish slips (12) are connected to the other end, the sub-unit connection of barrel (2) has section of thick bamboo shoes (3).

2. The downhole choke self-releasing overshot of claim 1, wherein: the fishing neck (1) is in plug-in connection with the barrel body (2), and the plug-in parts of the fishing neck (1) and the barrel body (2) are matched by conical surfaces.

3. The downhole choke self-releasing overshot of claim 1 or 2, characterized in that: one end of the piston rod (5) is connected with the upper joint (4) through a cylindrical pin (9), and the other end of the piston rod is connected with a piston rod sleeve (6) through the cylindrical pin (9).

4. The downhole choke self-releasing overshot of claim 3, wherein: and a pressing cap (7) used for connecting a fish dropping slip (12) is arranged on the piston rod sleeve (6).

5. The downhole choke self-releasing overshot of claim 1, 2 or 4, wherein: the fish-falling slips (12) are provided with positioning blocks (8) and springs (11), and protruding rings which are integrally formed with the fish-falling slips (12) are arranged between the positioning blocks (8) and the springs (11).

6. The downhole choke self-releasing overshot of claim 5, wherein: and a check thread (10) is arranged between the fish falling slips (12) and the positioning block (8).

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