CN214787286U

CN214787286U - Reversing fishing spear for workover operation

Info

Publication number: CN214787286U
Application number: CN202120100593.4U
Authority: CN
Inventors: 谢明芳; 李金松; 李达
Original assignee: Yancheng Jinju Oil Machinery Manufacture Co ltd
Current assignee: Yancheng Jinju Oil Machinery Manufacture Co ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-11-19
Anticipated expiration: 2031-01-14

Abstract

The utility model discloses a lance is dragged for with back-off to workover, include and drag for lance, coupling, base, drag for the lance head, drag for the lance claw, drag for lance cavity, drag for lance lower part and be provided with many rotatory grooves, the coupling links firmly at dragging for lance top, the base is the tube-shape, cup joints on dragging for the lance, is located the coupling below, install a plurality of hoop files on the base, the hoop file is the arc piece dress, and hoop file outer wall is provided with the file tooth. The fishing spear head is inserted at the bottom of the fishing spear rod and is coaxial with the fishing spear rod, the fishing spear head is hollow, an inclined opening is formed in the lower portion of the fishing spear head, and a conical surface is formed in the bottom of the fishing spear head. Drag for the spear claw and be provided with four separately slips in lower part, drag for the spear claw inboard and be provided with and move back the spear ring, move back and be provided with the clearance fit of key and slips on the spear ring. The utility model discloses be provided with a plurality of rings to the file, can have frustrated the maintenance to the arch of the underground casing pipe that warp, drag for the lance and drag for lance claw cavity, drag for and be provided with many rotatory slots on the lance, improve the falling speed who drags for the lance.

Description

Reversing fishing spear for workover operation

Technical Field

The utility model belongs to the petroleum machinery field, concretely relates to trip-over drags for lance for workover.

Background

In the prior art, the back-off fishing spear is used for fishing and back-off operation, and in the fishing operation, the back-off fishing spear is one of the important matched tools of the back-off device and can be matched with a back-off drill rod for use. The back-off fishing spear comprises a joint, a connecting sleeve, a slip, a spear and the like. When the slips enter the inner hole of the fish, the three-piece slips with the outer diameter slightly larger than the inner diameter of the fish contract inwards, and the slips are tightly clamped on the wall of the fish pipe through the rebound force of the three-piece slips. And lifting the drilling tool, wherein the spear rod is attached to the conical surface of the slip, the generated radial component force enables the slip to bite the dragged pipe column, and the drilling tool is continuously lifted to realize the dragging. The drilling tool is rotated after the fish is bitten, the three keys on the spear bar block the slips to prevent the slips from rotating, and the slips transmit torque to the dragged pipe column to realize back-off. When the tool is withdrawn, the drilling tool is firstly put down to separate the spear from the conical surface of the slip, then the drilling tool is rotated forwards, the lower end surface of the slip is clamped on the end surfaces of the three keys of the spear, the slip is supported by the keys to prevent the conical surface from being attached, and the drilling tool can be withdrawn by lifting.

And because the underground casing pipe is easy to deform due to the existence of pressure, the protrusions can obstruct the operation of various plugging parts and need a special shaping tool for processing. Drag for the lance simultaneously and in the decline in-process, mainly rely on gravity to sink, because oil pressure or hydraulic existence, drag for lance descent speed not fast, efficiency is not high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a trip-over drags for lance for workover, the decline speed is very fast, and can repair sheathed tube arch to the above-mentioned not enough that prior art exists.

In order to achieve the above object, the utility model provides a trip spear for workover, include

The fishing spear is hollow, a plurality of rotary grooves are arranged at the lower part of the fishing spear, the grooves are spiral and extend spirally from bottom to top,

the coupling is fixedly connected with the top of the fishing spear rod, the fishing spear rod is matched with the fishing pipe column through the coupling,

the base is cylindrical and is sleeved on the fishing spear and positioned below the coupling, a plurality of circumferential files are mounted on the base and are arc-shaped pieces, file teeth are arranged on the outer walls of the circumferential files,

the fishing spear head is inserted at the bottom of the fishing spear and is coaxial with the fishing spear, the fishing spear head is hollow, an inclined opening is arranged at the lower part of the fishing spear head, a conical surface is arranged at the bottom of the fishing spear head,

drag for the spear claw, be provided with four lower part detached slips, there is the space each other, slides on dragging for the spear head, and the slips expands outward when dragging for the conical surface of spear head to move down, drags for spear claw inboard to be provided with and move back the lance ring, move back the lance ring cover and connect on dragging for the spear head, move back the clearance fit that is provided with key and slips on the lance ring.

Furthermore, the fishing spear is made of aluminum alloy.

Furthermore, more than three rotary grooves are formed, and more than four circumferential files are arranged.

Further, the depth of the rotating groove is 2-4 mm.

Furthermore, a plurality of vertical grooves are formed in the base, and the circumferential files are embedded into the grooves and locked on the outer wall of the base through screws.

Further, the circumferential rasp is subjected to quenching treatment.

The utility model has the advantages that:

1. the utility model discloses a well workover is with back-off fishing spear, be provided with the base at fishing spear pole end, imbed a plurality of hoop files on the base, through pull and rotation, can back up the arch of the well casing pipe that warp and repair, avoid influencing the use of shutoff spare part;

2. the utility model discloses simple structure, stable performance drags for the lance and drags for lance claw cavity, makes and drags for about the lance pressure balance, drags for simultaneously to be provided with many rotatory slots on the lance, forms the swirl, can improve the falling speed who drags for the lance.

Drawings

Fig. 1 is a three-dimensional schematic view of the reversing spear for workover treatment.

In the figure: 1. a base; 2. a coupling; 3. fishing out the spear; 4. circumferential rasps; 5. a spear withdrawing ring; 6. fishing a spearhead; 7. fishing out the spear claw; 8. the grooves are rotated.

Detailed Description

The following detailed description of the present invention will be made in conjunction with the accompanying drawings and specific embodiments.

As shown in figure 1, an inverted fishing spear for workover operation comprises

The fishing spear 3 is hollow, a plurality of rotary grooves 8 are arranged at the lower part of the fishing spear 3, the grooves are helical and extend spirally from bottom to top,

the coupling 2 is fixedly connected with the top of the fishing spear 3, the fishing spear 3 is matched with the fishing pipe column through the coupling 2,

the base 1 is cylindrical and is sleeved on the fishing spear 3 and positioned below the coupling 2, a plurality of circumferential files 4 are mounted on the base 1, the circumferential files 4 are arc-shaped pieces, file teeth are arranged on the outer walls of the circumferential files 4,

the fishing spear head 6 is inserted at the bottom of the fishing spear 3 and is coaxial with the fishing spear 3, the fishing spear head 6 is hollow, an inclined opening is arranged at the lower part of the fishing spear head 6, a conical surface is arranged at the bottom of the fishing spear head,

drag for spear 7, be provided with four lower part divided slips, there is the space each other, slides on dragging for spear head 6, and the slips expands outward when dragging for spear head 6's conical surface and move down, drag for spear 7 inboard and be provided with and move back spear ring 5, move back spear ring 5 and cup joint on dragging for spear head 6, move back and be provided with the clearance fit of key and slips on spear ring 5.

In practical application, the fishing spear 3 is made of aluminum alloy.

In practical application, the number of the rotary grooves 8 is more than three, and the number of the circumferential files 4 is more than four.

In practical applications, the depth of the rotating groove 8 is 2-4 mm.

In practical application, the base 1 is provided with a plurality of vertical grooves, and the circumferential rasp 4 is embedded in the grooves and locked on the outer wall of the base 1 through screws.

In practical application, the circumferential rasp 4 is subjected to quenching treatment.

To sum up, the utility model discloses be provided with a plurality of rings to the file, can have frustrated the arch of the underground casing pipe that warp and repair, drag for the lance and drag for lance claw cavity, drag for and be provided with many rotatory slots on the lance, improve the falling speed who drags for the lance.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the present invention is to provide a person skilled in the art with the ability to understand the contents of the present invention and implement the same, and not to limit the scope of the present invention.

Claims

1. The utility model provides a lance is dragged for to back-off for workover, its characterized in that: comprises that

The fishing spear (3) is hollow, a plurality of rotary grooves (8) are arranged at the lower part of the fishing spear (3), the grooves are spiral and extend spirally from bottom to top,

the coupling (2) is fixedly connected with the top of the fishing spear (3), the fishing spear (3) is matched with the fishing pipe column through the coupling (2),

the base (1) is cylindrical and is sleeved on the fishing spear (3) and located below the coupling (2), a plurality of circumferential files (4) are mounted on the base (1), the circumferential files (4) are arc-shaped pieces, file teeth are arranged on the outer wall of each circumferential file (4),

the fishing spear head (6) is inserted at the bottom of the fishing spear (3) and is coaxial with the fishing spear (3), the fishing spear head (6) is hollow, an inclined opening is formed at the lower part of the fishing spear head (6), a conical surface is formed at the bottom of the fishing spear head (6),

drag for spear claw (7), be provided with four lower part divided slips, have the space between each other, slide on dragging for spear head (6), the slips expands outward when dragging for the conical surface of spear head (6) to move up and down, drag for spear claw (7) inboard and be provided with back lance ring (5), back lance ring (5) cup joint on dragging for spear head (6), be provided with the clearance fit of key and slips on back lance ring (5).

2. The reversing bailing spear for workover treatment according to claim 1, wherein: the fishing spear (3) is made of aluminum alloy.

3. The reversing bailing spear for workover treatment according to claim 2, wherein: more than three rotary grooves (8) are formed, and more than four circumferential files (4) are formed.

4. The reversing bailing spear for workover treatment according to claim 1 or 3, wherein: the depth of the rotary groove (8) is 2-4 mm.

5. The reversing bailing spear for workover treatment according to claim 4, wherein: the base (1) is provided with a plurality of vertical grooves, and the circumferential file (4) is embedded into the grooves and locked on the outer wall of the base (1) through screws.

6. The reversing bailing spear for workover treatment according to claim 1, wherein: the circumferential rasp (4) is quenched.