CN217001757U

CN217001757U - Sucker rod fisher used in lining oil pipe

Info

Publication number: CN217001757U
Application number: CN202220394778.5U
Authority: CN
Inventors: 张兴瑞; 张峻; 巴红明; 梁磊; 张凯丽; 顾铖成; 聂启迪; 齐亚君
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-07-19
Anticipated expiration: 2032-02-25

Abstract

The utility model relates to a fishing tool for oil field and oil well operation, in particular to a sucker rod fisher used in a lining oil pipe. The fishing device comprises an upper joint, a fishing barrel, a spring, an anti-rotation pin plug and a fishing claw; the upper section of the fishing cylinder is provided with a sliding groove, the lower section of the fishing cylinder is provided with a jaw groove, and the lower section of the fishing cylinder is provided with an inner hole; the inner diameter of the upper part of the fishing claw is larger than that of the lower part of the fishing claw, so that a hanging shoulder is formed; the lower part of the fishing claw is provided with a reducing section, the lower end of the fishing claw is upwards provided with a plurality of empty grooves, and a clamping jaw is formed between the empty grooves; the upper part of the fishing claw is sleeved on the upper part of the fishing barrel, so that the claw is inserted into the claw groove, and the reducing section enters the inner hole of the fishing barrel from the claw groove; the anti-rotation pin is inserted into the fishing barrel and the fishing claw and is positioned in the sliding groove; the spring is sleeved on the upper part of the fishing barrel, the lower end face of the spring is seated on the fishing claw, the lower part of the upper joint is connected with the upper part of the fishing barrel, and the outer shoulder of the upper joint presses the upper end face of the spring. The fishing tool is simple in structure and strong in operation stability, and can quickly salvage the broken sucker rod at the head part of the sucker rod.

Description

Sucker rod fisher used in lining oil pipe

Technical Field

The utility model relates to an oil field and oil well operation fishing tool, in particular to a sucker rod fisher used in a lining oil pipe.

Background

In the oil well, the oil pipe lining is adopted for production in the oil pumping well pipe column with eccentric wear of the oil pipe and the oil pumping rod so as to increase the production period of the oil well, and the oil pipe lining is that a non-metal pipe with the wall thickness of 4mm-4.5mm is arranged on the inner wall of the existing oil pipe so that the inner wall of the existing oil pipe is protected. Therefore, the inner diameter of the lining oil pipe is 8mm-9mm smaller than that of the common oil pipe. For example, the inner diameter of the oil pipe with the diameter of phi 62 is processed into the inner lining oil pipe, and then the inner diameter is phi 53. When the lower part of the sucker rod is broken close to the rod head, the fishing tool is contacted with the rod head of the sucker rod, the diameter of the rod head is larger, for example, the diameter of the flange of a common phi 22 sucker rod is phi 38, the diameter difference between the sucker rod and the lining oil pipe with the inner diameter of phi 53 is only 15mm, and the unilateral clearance is only 7.5 mm. The existing sucker rod fisher cannot be used for fishing, because the outer diameter of the existing sucker rod fisher is large, the existing sucker rod fisher is of a two-layer structure, the unilateral thickness exceeds 7.5mm, and the sucker rod which is close to the fracture of the rod head part can not be fished in the lining oil pipe. When the sucker rod is broken close to the rod head, the oil well production cannot be recovered by an operation method of salvaging the sucker rod, and the oil well production can be recovered only by adopting a method with high operation cost and long operation time, so that great economic loss is caused.

Chinese utility model patent CN203626680U discloses a multi-functional sucker rod fisher, it includes: the upper end of the outer cylinder is in threaded connection with the upper connector, the lower end of the outer cylinder is in threaded connection with the guide shoe, and the upper end surface of the guide shoe is a guide conical surface; the upper section of the pressing sleeve is reduced to form a guide ring part, the lower section of the pressing sleeve is a ring sleeve part, the ring sleeve part is contacted with the inner side surface of the outer cylinder body, and the outer side of the guide ring part is sleeved with a compression spring; the upper ends of the limiting partition plates are contacted with the lower end of the ring sleeve part, and the lower ends of the limiting partition plates are connected with the upper end of the guide shoe; a plurality of movable joint portions are along circumference and each spacing baffle be setting in turn, including activity slider and card tooth piece, the lower terminal surface of activity slider is the outer inclined plane, its up end is the inclined plane, its interior wall is interior inclined plane, the up end of card tooth piece contacts with the lower terminal surface of ring cover portion, its lower terminal surface is including the outer inclined plane of second and the interior inclined plane of second, the outer inclined plane laminating of second is in the upper inclined plane, the inclined plane is the syntropy setting with interior inclined plane in the second, flush each other between the two, the internal face of card tooth piece is equipped with the card tooth.

Chinese utility model CN210178318U discloses a sucker rod fisher, including transition joint, salvage the barrel, offer on the transition joint and be used for releasing salvage the draining port of barrel internal pressure, the draining port will salvage the inside and whole of barrel the external environment intercommunication of fisher. Sucker rod fisher through add the draining hole on transition joint, can be so that salvage barrel and external environment intercommunication, salvage down in-process, fluid and pressure homoenergetic in the salvage barrel can obtain the release, are favorable to reducing fisher down resistance, make fisher go into the well smoothly, have reduced the degree of difficulty of sucker rod salvage operation.

Chinese utility model CN202850917U discloses a sucker rod fisher for inside lining oil pipe, including salvage joint, a bailer, a spring, the lock sleeve, the restraint ring, salvage joint upper portion has the sucker rod screw thread, the bailer lower part mills has many flutings, the fluting lower part mills logical, make to become the bar body between the fluting of a bailer, salvage joint lower part and bailer upper portion are connected, a spring, the lock sleeve suit is outside dragging for a section of thick bamboo, the up end of spring is withheld to the lower terminal surface of salvage joint, the up end of lock sleeve is withheld to the lower terminal surface of spring, the inside shoulder seat of lock sleeve is on the outer circular bead of bailer lower part, the lower part of a bailer is wrapped to the inner wall under the inside circular bead of lock sleeve, there is the hole enlargement chamber inside the bailer, the restraint ring is located the hole enlargement intracavity.

The existing sucker rod fisher used in the lining oil pipe has fewer types, and still needs a sucker rod fisher which can be used in the lining oil pipe and can be fast and stable.

Disclosure of Invention

The utility model mainly aims to provide a sucker rod fisher used in a lining oil pipe, which can salvage a sucker rod broken close to the head part of the rod in the lining oil pipe, has simple structure and strong operation stability, and can quickly salvage the sucker rod broken at the head part of the rod.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a sucker rod fisher used in a lining oil pipe, which comprises an upper joint, a fishing barrel, a spring, an anti-rotation pin plug and a fishing claw; the upper section of the fishing cylinder is provided with a sliding groove, the lower section of the fishing cylinder is provided with a jaw groove, and the lower section of the fishing cylinder is provided with an inner hole; the inner diameter of the upper part of the fishing claw is larger than that of the lower part of the fishing claw, so that a hanging shoulder is formed; the lower part of the fishing claw is provided with a reducing section, the lower end of the fishing claw is upwards provided with a plurality of empty grooves, and a clamping jaw is formed between the empty grooves; the upper part of the fishing claw is sleeved on the upper part of the fishing barrel, so that the claw is inserted into the claw groove, and the reducing section enters the inner hole of the fishing barrel from the claw groove; the anti-rotation pin is inserted into the fishing barrel and the fishing claw and is positioned in the sliding groove; the spring is sleeved on the upper part of the fishing barrel, the lower end face of the spring is seated on the fishing claw, the lower part of the upper joint is connected with the upper part of the fishing barrel, and the outer shoulder of the upper joint presses the upper end face of the spring; the inner diameter of the lower part of the fishing claw is larger than the rod diameter of the sucker rod to be fished and smaller than the flange diameter of the rod head of the sucker rod to be fished.

Furthermore, the upper section of the overshot is provided with three sliding grooves, and the three sliding groove rails are symmetrical to each other.

Further, the diameter of the upper section of the overshot is smaller than the diameter of the lower section.

Furthermore, 3-6 claw groove rails are arranged on the lower section of the fishing barrel, and the number of the claws is the same as that of the claw grooves.

Further, the diameter of the reducing section is equal to the diameter of the inner hole of the fishing barrel.

Furthermore, the lower end of the diameter reducing section is provided with a guide cone.

Further, the upper part of the upper joint is provided with threads.

Compared with the prior art, the utility model has the following advantages:

the sucker rod fisher can be used for fishing the broken sucker rod at the head part of the fishing rod in the lining oil pipe and connecting the square ridge part, and the broken sucker rod at the head part of the fishing rod can be fished out without lifting the oil pipe. The sucker rod fisher has the advantages of simple structure and strong operation stability, and can quickly salvage the broken sucker rod connecting square ridge part at the rod head part.

Drawings

FIG. 1 is a schematic structural diagram of a sucker rod fisher for lining a tubing according to embodiment 1 of the utility model;

fig. 2 is a cross-sectional view of a canister in accordance with embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a canister in embodiment 1 of the utility model;

fig. 4 is a front view of the fishing claw according to embodiment 1 of the present invention;

fig. 5 is a schematic view of the overall structure of the fishing claw in embodiment 1 of the present invention.

The fishing tool comprises an upper connector 1, a spring 2, a fishing barrel 3, an anti-rotation pin 4, a fishing claw 5, a sliding groove 31, an inner hole 32, a claw groove 33, a hanging shoulder 51, a reducing section 52, a guide cone 53, a claw 54.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all 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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.

In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.

Example 1

As shown in figure 1, the sucker rod fisher used in the lining oil pipe comprises an upper joint 1, a spring 2, a fishing barrel 3, an anti-rotation pin 4 and a fishing claw 5.

As shown in fig. 2 and 3, the diameter of the upper section of the overshot 3 is smaller than that of the lower section, the upper section of the overshot 3 is provided with two symmetrical sliding grooves 31, the lower section of the overshot 3 is provided with a plurality of jaw grooves 33 which are uniformly distributed on the lower section of the overshot 3; the lower section of the fishing barrel 3 is provided with an inner hole 32.

The upper inner diameter of the claw 5 is larger than the lower inner diameter, so that a hanging shoulder 51 is formed; the inner diameter of the lower part of the fishing claw 5 is larger than the rod diameter of the sucker rod to be fished and smaller than the flange diameter of the rod head of the sucker rod to be fished; the lower part of the fishing claw 5 is provided with a reducing section 52, and the diameter of the reducing section 52 is equal to that of the inner hole 32; the lower end of the reducing section 52 is provided with a guide cone 53; a plurality of empty grooves are formed upwards at the lower end of the fishing claw 5, clamping jaws 54 are formed between the empty grooves, and the quantity of the clamping jaws 54 is the same as that of the clamping jaw grooves 33.

The upper part of the fishing claw 5 is sleeved on the upper part of the fishing barrel 3, so that the claw 54 is inserted into the claw groove 33, and the reducing section 52 enters the inner hole 32 of the fishing barrel 3 from the claw groove 33, so that the claw 54 is restrained and can not expand; the anti-rotation pin 4 is inserted into the fishing barrel 3 and the fishing claw 5 and is positioned in the sliding groove 31, so that the fishing claw 5 can only axially slide on the fishing barrel 3 and can not relatively rotate, and the fishing is more stable; the spring 2 is sleeved on the upper part of the fishing barrel 3, the lower end face of the spring 2 is seated on the fishing claw 5, the lower part of the upper joint 1 is connected with the upper part of the fishing barrel 3, and the outer shoulder of the upper joint 1 presses the upper end face of the spring 2.

The upper part of the upper joint 1 is provided with threads.

When in use, the sucker rod fisher used in the lining oil pipe is connected with the lower part of the sucker rod, when the sucker rod fisher is lowered to the position close to the head part of the sucker rod and the fracture position, the fished part enters the lower part of the fishing barrel 3, because the inner diameter of the lower part of the fishing claw 5 is larger than the rod diameter of the sucker rod to be fished and smaller than the diameter of the flange of the sucker rod head to be fished, the flange of the rod head pushes the fishing claw 5 to go up to compress the spring 2, so that the reducing section 52 leaves the inner hole 32, the reducing section 52 is expanded without restriction, the flange part of the rod head to be salvaged passes through the inner hole 32, the spring 2 presses back the fishing claw 5, so that the flange part of the rod head to be salvaged is hung on the hanging shoulder 51, the claw 54 returns to the inner hole 32 and is not expanded any more, thereby, the broken square ridge part of the sucker rod close to the head part of the sucker rod can be quickly and stably salvaged.

All parts and parts which are not discussed in the utility model and the connection mode of all parts and parts in the application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Claims

1. A sucker rod fisher used in a lining oil pipe comprises an upper joint, a fishing barrel, a spring, an anti-rotation pin plug and a fishing claw; the fishing device is characterized in that the upper section of the fishing barrel is provided with a sliding groove, the lower section of the fishing barrel is provided with a jaw groove, and the lower section of the fishing barrel is provided with an inner hole;

the inner diameter of the upper part of the fishing claw is larger than that of the lower part of the fishing claw, so that a hanging shoulder is formed; the lower part of the fishing claw is provided with a reducing section, the lower end of the fishing claw is upwards provided with a plurality of empty grooves, and a clamping jaw is formed between the empty grooves;

the upper part of the fishing claw is sleeved on the upper part of the fishing barrel, so that the claw is inserted into the claw groove, and the reducing section enters the inner hole of the fishing barrel from the claw groove; the anti-rotation pin is inserted into the fishing barrel and the fishing claw and is positioned in the sliding groove; the spring is sleeved on the upper part of the fishing barrel, the lower end face of the spring is seated on the fishing claw, the lower part of the upper joint is connected with the upper part of the fishing barrel, and the outer shoulder of the upper joint presses the upper end face of the spring; the inner diameter of the lower part of the fishing claw is larger than the rod diameter of the sucker rod to be fished and smaller than the flange diameter of the rod head of the sucker rod to be fished.

2. The sucker rod overshot for lining a tubing of claim 1, wherein the upper section of the overshot is provided with two sliding grooves, the two sliding grooves are symmetrical to each other.

3. The sucker rod overshot for use in a lined tubing of claim 1, wherein the overshot has an upper diameter that is smaller than a lower diameter.

4. The sucker rod fisher for the lining oil pipe of claim 1 wherein the lower section of the fishing barrel is provided with 3-6 claw grooves, and the number of the claws is the same as that of the claw grooves.

5. The sucker rod overshot for use in a lined tubing of claim 1, wherein the reduced diameter section has a diameter equal to the inner bore diameter of the overshot.

6. The sucker rod overshot for use in a liner of a tubing of claim 1, wherein the reduced diameter section has a guide cone at a lower end thereof.

7. The sucker rod fisher for lining a tubing of claim 1 wherein the upper portion of the upper joint is threaded.