CN212317912U - Fishing device for underground falling objects - Google Patents

Abstract

The utility model provides a junk fishing device in pit, it includes the overshot of tube-shape, is equipped with at least one joint subassembly in the overshot, and every joint subassembly is including fixing a plurality of jack catchs on the inner wall of overshot, and a plurality of jack catchs are arranged along the circumferencial direction of overshot, and the inboard of a plurality of jack catchs forms the passageway that supplies the junk in the pit to stretch into, and the diameter of passageway is less than the diameter of junk in the pit, and the common centre gripping of a plurality of jack catchs can stretch into the junk in the pit in the passageway. The utility model discloses can be fast, effectively salvage the junk in the pit, use safe and reliable, be particularly useful for salvaging in irregular borehole be the orientation of slope gesture not placed in the middle, instruments such as deviational survey.

Description

Fishing device for underground falling objects

Technical Field

The utility model belongs to the technical field of the oil drilling technique and specifically relates to a junk fishing device in pit.

Background

In the oil field downhole operation, tools often fall into a well, for example, in the oil drilling process, in order to control the track of the well, a large number of MWD (measurement while drilling), LWD (logging while drilling) instruments and the like are used for tracking and measuring, the instruments are expensive, up to millions and even thousands of yuan, once the well falls, the tools cannot be fished, great economic loss is caused, and the risk that the whole well is scrapped is further faced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a junk fishing device in pit to salvage the junk in pit.

In order to achieve the above object, the utility model provides a junk fishing device in pit, its overshot that includes the tube-shape, be equipped with at least one joint subassembly in the overshot, every the joint subassembly is including fixing a plurality of jack catchs on the inner wall of overshot, it is a plurality of the jack catchs are followed the circumferencial direction of overshot is arranged, and is a plurality of the inboard formation of jack catchs supplies the passageway that the junk stretched into in the pit, the diameter of passageway is less than the diameter of junk in the pit, and is a plurality of the common centre gripping of jack catchs can stretch into in the passageway the junk in the pit.

The fishing device for the underground junk comprises a plurality of clamping assemblies, wherein the clamping assemblies are fixed on the inner wall of the fishing barrel in a barb shape, the clamping assemblies are conical ring-shaped, the diameters of the clamping assemblies are gradually reduced from bottom to top, and the inner sides of the upper ends of the clamping assemblies form a channel.

A downhole junk fishing apparatus as described above, wherein the jaws are bendable metal jaws.

The fishing device for the underground falling objects, wherein the claw is a steel wire rope section or a metal elastic sheet.

The fishing device for the underground falling objects is characterized in that a plurality of clamping assemblies are arranged in the fishing barrel, and the plurality of clamping assemblies are sequentially arranged along the axial direction of the fishing barrel.

The diameter of the channel inside the clamping assembly is gradually reduced from bottom to top.

The device for fishing the underground junk comprises a fishing barrel, wherein a fishing groove is formed in the side wall of the fishing barrel and is located below the clamping component, the fishing groove extends along the axial direction of the fishing barrel and penetrates through the bottom end face of the fishing barrel, and the underground junk enters the fishing barrel through the fishing groove.

The downhole junk fishing device as described above, wherein the lower end of the fishing barrel is provided with a hook capable of pulling the downhole junk into the fishing groove, and the hook extends from a side wall of the fishing groove along the circumferential direction of the fishing barrel and bends toward the inside of the fishing groove.

The device for salvaging the underground junk is characterized by further comprising a circulating head connected above the salvaging barrel, wherein a drill rod buckle used for being connected with a drilling tool is arranged at the top of the circulating head, and a channel for communicating the drilling tool with the salvaging barrel is arranged inside the circulating head.

The device for fishing the fallen objects in the well, wherein the outer diameter of the fishing barrel is 2.5-3.5 inches smaller than the diameter of the well hole in which the fallen objects are located.

The utility model discloses a junk fishing device in pit's characteristics and advantage are:

1. the underground falling object fishing device of the utility model catches the underground falling object by arranging the fishing barrel, and clamps the underground falling object by arranging the clamping component in the fishing barrel, thereby realizing the quick and effective fishing of the underground falling object, being safe and reliable to use, and being especially suitable for fishing long rod-shaped directional instruments, inclination measuring instruments and the like; for the underground falling objects which are inclined and not centered in the well, the fishing can be captured in the fishing can by lowering the fishing can and inserted into the channel at the inner side of the clamping component, so that the falling objects can be quickly fished;

2. the jack catch of the fishing device for the underground falling objects is fixed on the inner wall of the fishing barrel in a barb shape, when the fishing barrel is lifted, the jack catch can provide larger downward sliding resistance for the underground falling objects, and the safety and the reliability of fishing are further improved;

3. the utility model discloses a device for salvaging underground falling objects, its overshot and well bore matching degree are high, therefore when salvaging the underground falling objects whose diameter is far less than the well bore diameter, the overshot can catch and protect the underground falling objects quickly, even if the underground falling objects are not in the middle of the slope, the quick salvaging can be realized, the problem that the existing salvaging device is difficult to salvage the underground falling objects whose diameter is far less than the well bore diameter and is in the middle of the slope is solved;

4. the underground junk fishing device of the utility model has the advantages that by arranging the fishing groove and the shifting hook, underground junk can enter the fishing barrel from the side direction of the fishing barrel through the fishing groove, when the underground junk attached to the well wall is fished, the fishing barrel is slightly rotated, the shifting hook can shift the underground junk attached to the well wall into the fishing groove, and the fishing speed is further improved;

5. the utility model discloses a junk fishing device in pit can salvage the junk in the pit of any gesture fast, also has very high salvage success rate to salvaging the junk in the pit in irregular borehole, is particularly useful for salvaging and is the orientation of slope gesture not placed in the middle, instruments such as deviational survey in irregular borehole, its simple structure, the processing preparation of being convenient for, easy operation, convenience, swift practices thrift salvage time, reduces economic loss.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

fig. 1 is a schematic view of an embodiment of the fishing device for fallen objects in a well.

Main element number description:

1. an overshot; 11. salvaging a groove; 2. a clamping assembly; 21. a claw;

3. hooking; 4. a circulation head; 41. buckling a drill rod; 5. and fitting the joint.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Where adjective or adverbial modifiers "upper" and "lower", "top" and "bottom", "inner" and "outer" are used merely to facilitate relative reference between groups of terms, and do not describe any particular directional limitation on the modified terms. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1, the utility model provides a junk fishing device in pit for salvage directional instrument, the junk in pit such as deviational survey instrument, this fishing device includes overshot 1 of tube-shape, be equipped with at least one joint subassembly 2 in the overshot 1, every joint subassembly 2 is including fixing a plurality of jack catchs 21 on overshot 1's inner wall, a plurality of jack catchs 21 are arranged along overshot 1's circumferencial direction, the inboard of a plurality of jack catchs 21 forms the passageway that supplies the junk in pit to stretch into, the diameter of this passageway is less than the diameter of junk in pit, the common centre gripping of a plurality of jack catchs 21 can stretch into the junk in pit in the passageway.

When the underground junk fishing device is used, the fishing barrel 1 is lowered, underground junk is made to extend into the fishing barrel 1 and inserted into the channels on the inner sides of the clamping jaws 21, the clamping jaws 21 can tightly grasp the outer wall of the underground junk due to the fact that the diameter of the channels is smaller than that of the underground junk, the underground junk is clamped by the clamping jaws 21 together, the fishing barrel 1 is lifted upwards, and the clamping assembly 2 in the fishing barrel 1 drives the underground junk to move upwards, so that the underground junk is quickly fished to the ground; for the underground falling object which is inclined and not centered in the well, the fishing can be captured in the fishing barrel 1 by lowering the fishing barrel 1 and inserted into the channel on the inner side of the clamping assembly 2, so that the falling object is fished up.

The utility model discloses a junk fishing device in pit can be fast, effectively salvage junk in pit, uses safe and reliable, is particularly useful for salvaging borehole instruments such as long rod-like directional instrument, deviational survey instrument, consequently the utility model discloses a junk fishing device in pit also can be called instrument fishing device in pit.

As shown in fig. 1, in one embodiment, the jaws 21 are fixed on the inner wall of the overshot 1 in a barb shape, that is, the jaws 21 are inclined upwards from the inner wall of the overshot 1, the jaws 21 enclose a conical ring-shaped clamping assembly 2 with a diameter gradually decreasing from bottom to top, and the inner side of the upper end of the clamping assembly 2 forms the above-mentioned channel. In the embodiment, the claw 21 is arranged in a barb shape, so that when the fishing barrel 1 is lifted up, the claw 21 can provide larger sliding resistance to the falling objects in the well, and the safety and the reliability of fishing are further improved.

Specifically, the two ends of the jaw 21 are respectively a fixed end and a free end, the fixed end of the jaw 21 is fixedly connected with the inner wall of the overshot 1, the free end of the jaw 21 is located on the radial inner side of the fixed end of the overshot 1 in the radial direction of the overshot 1, the free end of the jaw 21 is located above the fixed end of the overshot 1 in the axial direction of the overshot 1, after the underground falling object is inserted into the clamping assembly 2, the overshot 1 is lifted upwards, and the free end of the jaw 21 grasps the outer wall surface of the underground falling object and generates sliding resistance to the underground falling object.

Further, the jaw 21 is inclined at an angle of 15 to 30 degrees with respect to the radial plane of the overshot 1, for example 20 or 25 degrees.

In one embodiment, the jaw 21 is a bendable metal jaw, and since the diameter of the channel inside the jaw 21 is smaller than the diameter of the downhole junk, when the downhole junk is inserted into the channel from below the jaw 21 upwards, the downhole junk presses the jaw 21 upwards to bend the jaw 21 upwards, and when the fishing barrel 1 is lifted up, the jaw 21 generates a downward sliding resistance to the downhole junk, that is, the jaw 21 tightly grips the outer wall of the downhole junk, thereby clamping the downhole junk.

The metal clamping jaw of the embodiment can generate certain elastic deformation, allows underground falling objects to be inserted into the channel with the smaller diameter, has higher structural strength, and can clamp the underground falling objects to prevent the underground falling objects from falling.

Furthermore, the claw 21 is a steel wire rope section or a metal elastic sheet, so that the structure is very simple and the cost is low. For example the jaw 21 is fixed to the inner wall of the overshot 1 by welding.

In one embodiment, as shown in fig. 1, a plurality of clamping assemblies 2 are arranged in the overshot 1, and the plurality of clamping assemblies 2 are arranged in sequence along the axial direction of the overshot 1. This embodiment can produce bigger gliding resistance to the junk in the pit through setting up a plurality of joint subassemblies 2 to the junk in the pit is more firmly centre gripping, further improves the fail safe nature of salvaging.

Furthermore, the diameters of the channels in the plurality of clamping components 2 sequentially arranged from bottom to top are sequentially decreased progressively, so that underground falling objects can be conveniently inserted into the plurality of clamping components 2 from bottom to top and can be firmly clamped.

In one embodiment the outer diameter of the overshot 1 is 2.5-3.5 inches, i.e. 63.5-88.9 mm smaller than the diameter of the borehole in which the downhole fish is located, e.g. the outer diameter of the overshot 1 is 3 inches, i.e. 76.2mm smaller than the diameter of the borehole in which the downhole fish is located. In this embodiment, the size of overshot 1 is slightly littleer than the size of well, and overshot 1 is high with the well matching degree, consequently when salvaging the diameter and be less than the well diameter's in the pit junk far away, overshot 1 can catch the underground junk fast, even this underground junk is the not intermediate gesture of slope in the well, also can realize quick salvage, solved the present fishing device exist be difficult to salvage the diameter far less than the well diameter, be the not intermediate gesture's in the pit problem of slope.

As shown in fig. 1, in one embodiment, a fishing groove 11 is formed in a side wall of the overshot 1, the fishing groove 11 can also be referred to as a gap, the fishing groove 11 is located below the clamping component 2, the fishing groove 11 extends along an axial direction of the overshot 1 and penetrates through a bottom end surface of the overshot 1, that is, a bottom of the fishing groove 11 is open, and downhole debris enters the overshot 1 through the fishing groove 11. For example, the width of the fishing slot 11 is equal to the diameter of the overshot 1.

This embodiment is through setting up salvage groove 11, makes in the junk gets into overshot 1 more easily, especially when salvaging the long shaft-like junk in the pit of directional instrument, inclinometer, the side direction of overshot 1 in the junk can get into overshot 1 through salvage groove 11 in the junk in the pit, overshot 1 catches and protects the junk in the pit with the help of overshot 11 fast, further improves fishing speed.

As shown in fig. 1, furthermore, the lower extreme of the overshot 1 is equipped with the hook 3 that dials into the salvage groove 11 with the junk in the pit, and the hook 3 that dials is hook-shaped, and the hook 3 extends and bends towards the salvage groove 11 from a lateral wall of the overshot 11 along the circumference of the overshot 1, and when salvaging the junk in the pit that leans on the wall of a well, only need slightly rotate the overshot 1, and the hook 3 just can dial into the salvage groove 11 with the junk in the pit that leans on the wall of a well, further improves salvage speed, and easy operation, convenience, swiftly.

As shown in fig. 1, in one embodiment, the fishing device for the downhole junk further comprises a circulation head 4 connected above the fishing barrel 1, a drill pipe buckle 41 for connecting with a drilling tool is arranged at the top of the circulation head 4, that is, the circulation head 4 is in threaded connection with the drilling tool through the drill pipe buckle 41, and a passage for communicating the drilling tool with the fishing barrel 1 is arranged inside the circulation head 4 so as to facilitate the pump-on circulation to flush through a resistance point when the fishing device is in resistance. When the fishing tool is used on site, the circulating head 4 of the fishing device is connected with the drilling tool, and the fishing device is lowered to the underground through the drilling tool.

As shown in fig. 1, the circulation head 4 is further connected with the overshot 1 through the matching joint 5, for example, the matching joint 5 is connected with the circulation head 4 and the overshot 1 through threads, so that the assembling and disassembling are convenient.

The utility model discloses a fishing device's application effect is explained through an application example below:

the MWD instrument that a borehole diameter caused for the broken drilling tool together takes place in 311 mm's the well, and this MWD instrument falls in the well depth 637m department, and the external diameter of this instrument only is 48mm, is far less than the borehole diameter, and serious slope is in the well, and the special fishing tool of MWD instrument is gone into many times in the scene and has not been dragged for, uses the utility model discloses a fishing device salvages, once only salvages successfully, and the external diameter of the fishing barrel that wherein uses is 244.5mm, and is high with the well matching degree.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention. Moreover, it should be noted that the components of the present invention are not limited to the above-mentioned integral application, and various technical features described in the present invention can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention of the present invention.

Claims (10)

1. The utility model provides a junk fishing device in pit which characterized in that, junk fishing device in pit includes the overshot of tube-shape, be equipped with at least one joint subassembly in the overshot, every the joint subassembly is including fixing a plurality of jack catchs on the inner wall of overshot, and is a plurality of the jack catchs are followed the circumferencial direction of overshot is arranged, and is a plurality of the inboard of jack catchs forms the passageway that supplies the junk in pit to stretch into, the diameter of passageway is less than the diameter of junk in pit, and is a plurality of the common centre gripping of jack catchs can stretch into in the passageway the junk in pit.

2. The device for fishing junk downhole as claimed in claim 1, wherein the jaws are fixed on the inner wall of the overshot in a barb shape, the jaws enclose the clamping assembly in a cone ring shape with a diameter gradually reduced from bottom to top, and the channel is formed on the inner side of the upper end of the clamping assembly.

3. A downhole junk fishing device as in claim 1 wherein the jaws are bendable metal jaws.

4. A downhole junk fishing device as claimed in claim 3 wherein the claw is a wire rope section or a metal spring.

5. A downhole junk fishing apparatus as claimed in any one of claims 1 to 4 wherein a plurality of said snap-in assemblies are provided within said overshot, said snap-in assemblies being arranged one after the other in an axial direction of said overshot.

6. A junk fishing device as set forth in claim 5, wherein the diameters of the passages inside the plurality of snap-in assemblies sequentially decrease from bottom to top.

7. The device for fishing the fallen downhole objects as claimed in any one of claims 1 to 4, wherein a fishing slot is formed in a side wall of the overshot, the fishing slot being located below the snap-in assembly, the fishing slot extending in an axial direction of the overshot and penetrating through a bottom end surface of the overshot, the fallen downhole objects entering the overshot through the fishing slot.

8. A downhole junk fishing device as defined in claim 7, wherein the lower end of the overshot is provided with a hook adapted to hook the downhole junk into the fishing groove, the hook extending from a side wall of the fishing groove in a circumferential direction of the overshot and curving into the fishing groove.

9. A downhole junk fishing device as claimed in any one of claims 1 to 4 further comprising a circulation head connected above the overshot, the circulation head having a drill pipe button at a top thereof for connection to a drill tool, the circulation head having a passage therein communicating the drill tool with the overshot.

10. A downhole junk fishing device as claimed in any of claims 1 to 4, wherein the outer diameter of the overshot is between 2.5 and 3.5 inches smaller than the diameter of the borehole in which the downhole junk is located.

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