CN210217677U

CN210217677U - Reverse circulation built-in salvaging cup

Info

Publication number: CN210217677U
Application number: CN201920682000.2U
Authority: CN
Inventors: Tao He; 何涛; Zenghai Chen; 陈增海; Gang Dai; 代刚; Jiangang Hao; 郝建刚; Zejun Hua; 华泽君; Lei Zhang; 张磊; Yapeng Li; 李亚鹏; Guanglei Zheng; 郑广磊
Original assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Current assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2020-03-31
Anticipated expiration: 2029-05-13

Abstract

The reverse circulation built-in salvaging cup relates to the technical field of salvaging tools for oil field well workover operation, and comprises an outer cylinder and an inner cylinder arranged in the outer cylinder, wherein the lower end of an annular space between the outer cylinder and the inner cylinder is closed, the inner cylinder is provided with a liquid passing hole communicated with the annular space, and the upper end of the inner cylinder is positioned in the outer cylinder. The utility model discloses a built-in salvage cup of reverse circulation can be arranged in the reverse circulation shell milling, milling or salvage construction, can carry out ground with smallclothes junk such as piece, irregular junk in the pit shaft, can improve the collection effect of smallclothes junk.

Description

Reverse circulation built-in salvaging cup

Technical Field

The utility model relates to a fishing tool technical field that oil field workover used, concretely relates to built-in fishing cup of reverse circulation.

Background

The common flushing construction of sand flushing, well flushing, casing milling and the like for offshore oilfield downhole operation measures mostly adopts a reverse circulation mode because part of oilfield block equipment is aged, the diameter of a sleeve is large, and the power of a circulation system is insufficient. In the reverse circulation sand washing and casing milling construction, the small falling objects with larger diameters, such as packer rubber or irregular falling objects, cannot return to the ground, fall into the upper part of the fish top or a shaft again after the pump is stopped, so that the later construction is difficult, and the drilling blockage accident is easy to happen.

SUMMERY OF THE UTILITY MODEL

For realizing that the reverse circulation overlaps mills, carries out ground with the smallclothes junk among the salvage process, an embodiment of the utility model provides a built-in salvage cup of reverse circulation, include the urceolus and locate inner tube in the urceolus, the urceolus with inner tube annular space between the two's lower extreme seals, be equipped with the intercommunication on the inner tube annular space cross the liquid hole, the upper end of inner tube is located in the urceolus.

Has the advantages that:

the utility model discloses built-in salvage cup of reverse circulation can be arranged in the reverse circulation cover mills, mills or salvages the construction, utilizes annular space between inner tube and the urceolus to carry out ground with little junk such as piece, irregular junk in the pit shaft, can improve the collection effect of little junk, has the characteristics of security height, commonality are strong, easy operation.

The utility model discloses built-in salvage cup of reverse circulation can connect on the tubular column of reverse circulation sleeve milling, milling or salvage operation, convenient to use.

Drawings

The accompanying drawings are included to provide a further understanding of the technical solutions of the present invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the present invention for explaining the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

Fig. 1 is a schematic structural view of a reverse circulation built-in salvaging cup according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

the reference signs are: 1. go up barrel, 2, inner tube, 3, lower clutch, 4, first sealing washer, 5, second sealing washer, 6, right body, 7, cross the liquid hole, 8, annular space.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.

As shown in fig. 1 and 2, the present embodiment provides a reverse circulation built-in salvage cup, which includes an outer cylinder and an inner cylinder 2 disposed in the outer cylinder, a lower end of an annular space 8 between the outer cylinder and the inner cylinder 2 is closed, a liquid passing hole 7 communicating with the annular space 8 is disposed on the inner cylinder 2, and an upper end of the inner cylinder 2 is located in the outer cylinder.

The reverse circulation built-in fishing cup can be used for reverse circulation milling, grinding milling or fishing construction, small fallen objects such as fragments and irregular fallen objects in a shaft are carried out of the ground by the annular space 8 between the inner barrel 2 and the outer barrel, the collecting effect of the small fallen objects can be improved, and the reverse circulation built-in fishing cup has the characteristics of high safety, strong universality and simplicity in operation.

The outer cylinder may include an upper cylinder 1 and a lower joint 3 connected to a lower end of the upper cylinder 1, a lower end of the inner cylinder 2 is connected to the lower joint 3, and the lower joint 3 is closed at a lower end of the annular space 8.

The lower end of the upper barrel body 1 can be in threaded connection with the outer wall of the lower joint 3, and the lower end of the inner barrel 2 is in threaded connection with the inner wall of the lower joint 3. Wherein, the adoption threaded connection is convenient for the dismantlement of each part of inner tube 2, lower clutch 3 and upper cylinder 1 to be changed and the maintenance.

The upper end of the upper cylinder 1 may be provided with a screw thread for connection with an upper connector. The reverse circulation built-in fishing cup of the embodiment can be connected to a downhole tool of a reverse circulation milling, grinding and flushing fishing operation drilling tool through the lower connector 3 and the threads at the upper end of the upper barrel 1.

Go up barrel 1 with be equipped with the sealing member between the lower clutch 3 for guarantee the sealed between the two, can set up first sealing washer 4 and second sealing washer 5 respectively at the both ends of both meets, two sealing washers can all adopt O type sealing washer.

The lower end of the upper barrel body 1 is in threaded connection with the outer wall of the lower joint 3, the lower end of the inner barrel 2 is in threaded connection with the inner wall of the lower joint 3, the lower end face of the inner barrel 2 abuts against the lower joint 3, and therefore the lower joint 3 can further support the inner barrel 2 to stabilize the inner barrel 2. Wherein, can set up a step in the inner wall department of lower clutch 3 upper end, be provided with the step complementary with this step on the outer wall of inner tube 2 lower extreme for the lower terminal surface butt of inner tube 2 is in lower clutch 3 on the step, the inside portion butt of lower clutch 3 up end is in inner tube 2 on the step, the outside portion butt of lower clutch 3 up end is on the circular bead that sets up on upper cylinder 1 inner wall. The part of the outer wall of the inner barrel 2, which is positioned at the lower part of the annular space 8, can protrude into the annular space 8, thus playing a role in strengthening the strength of the inner barrel 2.

The salvaging cup can also comprise a righting body 6, and the righting body 6 is arranged between the outer cylinder and the inner cylinder 2. The righting body 6 is used for preventing the inner barrel 2 from inclining and has a righting effect on the inner barrel 2.

The righting body 6 can be arranged in a plurality of ways and arranged along the circumferential direction of the inner barrel 2, so that the righting effect can be better played, and the inner barrel 2 is prevented from inclining to all directions. The righting body 6 can be in a curved plate shape and is arranged at the upper part of the annular space 8, one side surface of the righting body is fixed on one of the inner cylinder 2 and the upper cylinder 1, and the other side surface of the righting body is abutted against the other side surface of the inner cylinder 2 and the upper cylinder 1.

The inner wall of the outer barrel is inclined from bottom to top towards the inner side above the inner barrel 2, so that in reverse circulation sleeve milling, grinding milling or fishing construction, the inner wall of the outer barrel can guide small falling objects to enter the annular space 8 between the inner barrel 2 and the outer barrel.

The liquid passing holes 7 are arranged in a plurality and distributed along the circumferential direction of the inner barrel 2, so that the liquid entering the annular space 8 can flow out conveniently.

The built-in salvage cup of reverse circulation of this embodiment, its each part can be dismantled and change, and it is simple to maintain, has prolonged the life of instrument.

In practical application, the reverse circulation built-in salvaging cup of the embodiment is connected to a reverse circulation milling, grinding or salvaging operation pipe column. In the reverse circulation milling, grinding and milling or fishing process, small fallen objects such as fragments at the bottom of the well and the like enter the fishing cup from the lower end of the lower connector 3 of the reverse circulation built-in fishing cup of the embodiment along with reverse circulation liquid, the flow rate of the reverse circulation liquid is reduced because the inner space of the fishing cup above the inner cylinder 2 is suddenly enlarged, and the small fallen objects such as heavier fragments and the like fall into the annular space 8 between the inner cylinder 2 and the outer cylinder, so that the fallen objects at the bottom of the well are fished, and the purpose of cleaning the bottom of the well is achieved.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening elements, or may be connected through the interconnection between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

Claims

1. The utility model provides a built-in salvage cup of reverse circulation which characterized in that: the inner cylinder is arranged in the outer cylinder, the lower end of an annular space between the outer cylinder and the inner cylinder is sealed, a liquid passing hole communicated with the annular space is formed in the inner cylinder, and the upper end of the inner cylinder is located in the outer cylinder.

2. The reverse circulation built-in overshot of claim 1, further comprising: still including righting the body, righting the body and locating the urceolus with between the inner tube.

3. The reverse circulation built-in overshot of claim 2, further comprising: the righting body is arranged to be a plurality of and is arranged along the circumferential direction of the inner barrel.

4. The reverse circulation built-in overshot of claim 1, further comprising: the outer barrel comprises an upper barrel body and a lower joint connected to the lower end of the upper barrel body, the lower end of the inner barrel is connected to the lower joint, and the lower joint is sealed at the lower end of the annular space.

5. The reverse circulation built-in overshot of claim 4, further comprising: the lower end of the upper barrel is in threaded connection with the outer wall of the lower joint, and the lower end of the inner barrel is in threaded connection with the inner wall of the lower joint.

6. The reverse circulation built-in overshot of claim 5, further comprising: the lower end face of the inner cylinder is abutted against the lower joint.

7. The reverse circulation built-in overshot of claim 5, further comprising: and a sealing element is arranged between the upper cylinder and the lower joint.

8. The reverse circulation built-in overshot of claim 5, further comprising: and the upper end of the upper barrel is provided with a thread for connecting with an upper connecting piece.

9. The reverse circulation built-in overshot of claim 1, further comprising: the inner wall of the outer cylinder is inclined from bottom to top to the inner side above the inner cylinder.

10. The reverse circulation built-in overshot of claim 1, further comprising: the liquid passing holes are arranged in a plurality and distributed along the circumferential direction of the inner cylinder.