CN214007105U

CN214007105U - Fish abrasionproof decreases a fishing barrel

Info

Publication number: CN214007105U
Application number: CN202022662378.1U
Authority: CN
Inventors: 魏宏洋; 丁磊; 王磊; 梁志艳; 睢芬; 李新晨; 李一丰; 刘青山; 石锐; 赵忠文; 刘牟伟; 张婷婷
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-08-20
Anticipated expiration: 2030-11-17

Abstract

The utility model provides a fish abrasionproof decreases a fishing barrel, include: the inner wall surface of the outer cylinder is provided with a shoulder with a downward end surface; the lining fishing barrel is concentrically arranged in the outer barrel, and the inner wall of the lining fishing barrel is provided with a plurality of groups of locking pieces which incline upwards and are fixedly connected with a milling shoe at the lower end of the outer barrel; wherein the up end of milling shoe with form the annular groove between the circular bead, the inside lining overshot is installed in the annular groove, and can for the urceolus rotates, the pit shaft can be gone into and through to the overshot of fish abrasionproof decreases and the fish guide that falls in the pit through the milling shoe in the inside lining overshot, and pass through the locking piece forms the locking to the fish that falls in the pit, thereby can be through lifting the fish abrasionproof decreases and overshot and salvage the fish that falls in the pit.

Description

Fish abrasionproof decreases a fishing barrel

Technical Field

The utility model relates to a downhole tool technical field, concretely relates to a fish abrasionproof decreases a fishing barrel.

Background

At present, with the continuous development of the tower river oil field, the number of deep wells, ultra-deep wells, heavy oil wells and three-high wells is continuously increased, and various oil extraction processes such as mechanical production wells, electric pump well pump suspension are gradually deepened, profile control and water shutoff, acid fracturing and the like are widely applied. Most carbonate formations are completed in open holes, formation leakage is serious, and the corresponding wellbore temperature is high. High temperature, high pressure difference, high hydrogen sulfide content, acidizing, fracturing and corrosion and the like cause great damage to downhole tools and casings, so that downhole tools and pipes are frequently broken down, and the normal operation of construction operation is seriously influenced. Meanwhile, along with the increase of the service life of the casing in the shaft, the phenomena of leakage, deformation, fracture and fault fracture of the casing are increased. The underground condition becomes more complex due to a plurality of internal and external factors, the operation difficulty is continuously increased, and the requirement on the well repairing technology is continuously improved. Thus, the handling of downhole tools, string drop problems becomes of particular importance.

However, in the prior art, due to the fact that the well depth and the fishing pipe column load are large, the fishing operation precision of the small rod-shaped fish is not enough, the fish is easily damaged, and the fishing success rate is low.

It is therefore desirable to provide a fishing tool that can complete the casing, fishing and protect small rod-like fish.

SUMMERY OF THE UTILITY MODEL

To the technical problem as above, the utility model aims at providing a fish abrasionproof decreases a overshot, this fish abrasionproof decreases a overshot can salvage tiny shaft-like fish, realizes drawing the fish function to can guarantee to avoid causing the damage to the fish when salvaging.

Therefore, according to the utility model provides a fish abrasionproof decreases a fishing barrel, include: the inner wall surface of the outer cylinder is provided with a shoulder with a downward end surface; the lining fishing barrel is concentrically arranged in the outer barrel, and the inner wall of the lining fishing barrel is provided with a plurality of groups of locking pieces which incline upwards and are fixedly connected with a milling shoe at the lower end of the outer barrel; wherein the up end of milling shoe with form the annular groove between the circular bead, the inside lining overshot is installed in the annular groove, and can for the urceolus rotates, the pit shaft can be gone into and through to the overshot of fish abrasionproof decreases and the fish guide that falls in the pit through the milling shoe in the inside lining overshot, and pass through the locking piece forms the locking to the fish that falls in the pit, thereby can be through lifting the fish abrasionproof decreases and overshot and salvage the fish that falls in the pit.

In one embodiment, each set of locking elements comprises a plurality of flexible steel wires.

In one embodiment, the angle of inclination between the locking element and the inner wall surface of the lining canister is set to be in the range of 40-50 °.

In one embodiment, two sets of the locking elements are provided radially symmetrically at the same axial position of the liner canister.

In one embodiment, two sets of the locking elements that are axially adjacent in the liner canister are circumferentially staggered.

In one embodiment, two sets of the locking elements that are axially adjacent in the liner canister are circumferentially staggered by an angle of no less than 25 °.

In one embodiment the wall thickness of the mill is arranged to be in the range of 5-10 mm.

In one embodiment, the inner wall surface of the lower end of the milling shoe is provided with a chamfer for guiding the fallen fish down the well into the lining canister.

In one embodiment, the liner canister is a clearance fit with the annular groove.

In one embodiment, an upper joint is fixedly connected to the upper end of the outer cylinder, and the upper joint is used for being connected with an upper drill rod.

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

according to the utility model discloses a section of thick bamboo of fishing with a small, short and small shaft-like fish that falls in can salvage the well. To the fish top by the side the fish that falls in the pit, the fish abrasionproof decreases a fishing barrel can guide through milling shoes to effectively guide the fish that falls in the pit to the inside lining fishing barrel, and then smuggle secretly through the locking piece, accomplish and salvage. For the falling fish of the testing instrument, the instrument can be damaged by milling and salvaging a conventional steel wire salvaging sleeve, the fishing sleeve 100 capable of preventing the falling fish from being abraded can clean the top and the annular space of the falling fish, the thin-wall milling shoe sleeve is used for milling and guiding the falling fish, the falling fish is clamped by a locking piece formed by a flexible steel wire after the falling fish enters, and meanwhile, the falling fish is salvaged by a lining salvaging sleeve which does not rotate, so that the falling fish is effectively prevented from being damaged, and the falling fish is effectively protected. The fishing barrel for preventing fish from being abraded is beneficial to the fish entering of fine rod-shaped falling objects through the milling shoes, the fish guiding function is achieved, multiple tripping operations caused by the fact that the falling fish cannot be accurately fished during operation are greatly reduced, the fishing success rate is greatly enhanced, the fishing efficiency is remarkably improved, and the fishing operation time is effectively shortened. The method not only can effectively shorten the operation time, but also can improve the economic benefit of enterprises and save the cost of later measures.

Drawings

The present invention will be described with reference to the accompanying drawings.

Fig. 1 shows the structure of a fishing barrel for preventing fish from being worn by falling fish according to the utility model.

In the present application, all the figures are schematic and are only intended to illustrate the principles of the present invention and are not drawn to scale.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features and embodiments of the present invention.

It should be noted that various modifications and changes can be made to the embodiments of the present invention without departing from the scope or spirit of the present invention, as will be apparent to those skilled in the art. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.

In addition, still need to explain, will be according to the utility model discloses a one end that is close to the well head in the well bore is down defined as upper end or similar term to the fish abrasionproof decreases overshot, will keep away from the one end of well head and define as lower extreme or similar term.

Fig. 1 shows the structure of a fish overshot 100 according to the invention, which prevents fish from being worn. As shown in fig. 1, the fish anti-wear overshot 100 comprises an outer barrel 20. The outer cylinder 20 is configured in a hollow cylindrical shape. A shoulder 21 having a downward end face is provided on the inner wall surface of the outer cylinder 20. The function of the shoulder 21 is described below.

An upper joint 10 is fixedly connected to the upper end of the outer cylinder 20, and the upper joint 10 is used for connecting with a drill rod so as to lower the fish anti-abrasion fishing barrel 100 into a shaft through the drill rod. In one embodiment, the upper connector 10 is fixedly connected to the outer cylinder 20 by a screw connection.

According to the utility model discloses, fish abrasionproof decreases overshot 100 still includes inside lining overshot 30. The lining canister 30 is configured in a cylindrical shape and is concentrically arranged in the outer cylinder 20, and a plurality of sets of locking pieces 50 inclined upward are provided on the inner wall of the lining canister 30 for locking the fish falling downhole. As shown in fig. 1, a milling shoe 40 is further disposed at the lower end of the outer cylinder 20, and the milling shoe 40 is fixedly connected to the outer cylinder 20. For example, the mill 40 may be attached to the lower end of the outer cylinder 20 by a screw connection. The inner diameter of the milling shoe 40 is smaller than the inner diameter of the lining overshot 30, so that the upper end surface of the milling shoe 40 extends a part radially inwards relative to the lower end surface of the lining overshot 30, and the connection between the milling shoe 40 and the outer cylinder 20 forms an inner step with an upward end surface. Thereby, an annular groove 60 is formed between the shoulder 21 of the inner wall surface of the outer tube 20 and the axial direction of the inner step formed on the upper end surface of the mill 40. The liner canister 30 fits within the annular recess 60.

The mill 40 is at the end of the fish wear prevention overshot 100, and the mill 40 can guide the fish down into the lining overshot 30 and entrain the fish down through the locking member 50 to lock the fish down and then fish out the fish down by lifting the fish wear prevention overshot 100.

In this embodiment, the outer diameter of the liner canister 30 is smaller than the inner diameter of the annular groove 60 so that the liner canister 30 forms a clearance fit with the annular groove 60. The gap between the liner canister 30 and the annular groove 60 in the radial direction is at least 1 mm. Thereby, the liner canister 30 is able to rotate relative to the outer barrel 20 within the annular groove 60. Thus, in the process of lifting the fishing barrel 100 to prevent fish from being damaged, the lining fishing barrel 30 can be relatively independent without rotating along with the outer barrel 20, so that damage to the fished fish in the well can be effectively avoided.

In one embodiment, the inner diameter of the liner canister 30 is set to be no larger than the inner diameter of the mill 40. This is beneficial to the milling shoe 40 to guide the fallen fish into the lining overshot 30, and is beneficial to improving the fishing efficiency and the fishing success rate of the anti-abrasion overshot 100 for the fallen fish.

According to the present invention, the inner wall thickness of the milling shoe 40 is set to be in the range of 5mm to 10mm, and the axial length of the milling shoe 40 is set to be in the range of 40cm to 60 cm. The structure of the milling shoe 40 is beneficial to fishing fine rod-shaped falling fish, and the fishing success rate can be effectively improved.

In an embodiment not shown, the inner wall of the lower end of the milling shoe 40 is provided with an inner chamfer, so that its end forms a thin-walled guide shoe. The inner chamfer can effectively guide the underground fish, is very favorable for leading the underground fish to enter the lining fishing barrel 30, and can further improve the fishing efficiency and the fishing success rate of the fishing barrel 100 for preventing the fish from being abraded.

According to the utility model discloses, every group locking piece 50 includes many soft steel wires. For example, each set of locking elements 50 may be formed from a plurality of flexible wires that are bundled in a similar manner to a bundle to form a set of locking elements 50. Each set of the locking pieces 50 is provided to be inclined toward the upper end along the inner wall surface of the lining overshot 30, and the inclination angle between the locking piece 50 and the inner wall surface of the lining overshot 30 is set to be in the range of 40 ° to 50 °. Preferably, the angle of inclination between the locking element 50 and the inner wall surface of the lining canister 30 is set at 45 °. This configuration of the locking member 50 is highly advantageous for locking fish down into the liner canister 30 and the flexible wire does not damage the salvaged fish down the well, which is advantageous for protecting the salvaged fish down the well.

In this embodiment, two sets of locking elements 50 are provided radially symmetrically at the same axial position of the liner canister 30. Two groups of locking pieces which are adjacent in the axial direction of the lining overshot 30 are distributed in a staggered mode at a certain angle in the circumferential direction, and the staggered angle is not smaller than 25 degrees. Preferably, two axially adjacent sets of locking members may be circumferentially offset by 25 °. This configuration of the locking member 50 effectively entrains fish that falls downhole, greatly facilitates the improvement of the fishing efficiency and fishing success rate of the overshot 100 to prevent wear of the fish, and protects the fish that falls downhole.

In one embodiment, the locking element 50 is insert welded to the inner wall surface of the liner canister 30.

During actual fishing operation, the fishing barrel 100 capable of preventing fish from being abraded is placed in the shaft through the drill rod until the fishing barrel is placed at the position of the fish falling in the well, and then the fish falling in the well is fished. First, the milling shoe 40 cleans the fish head and annulus and guides the fish to the liner canister 30, and the locking member 50 axially locks the fish in the well, thereby completing the fishing of the fish in the well by lifting the fish wear prevention overshot 100 and entraining the fish in the well. In the process of lifting, the lining overshot 30 can not rotate relative to the outer cylinder, so that the entrained fish falling into the well is protected, and the damage of the fish falling into the well is effectively avoided. Therefore, the fish anti-abrasion fishing barrel 100 realizes functions of open hole well section pigging, fish detecting and jacking, fish cleaning, fish guiding and fishing of the fish, and can protect the fish from being damaged.

According to the utility model discloses a fish abrasionproof decreases a fishing barrel 100 can salvage tiny, short and small shaft-like fish in the well. To the fish top by the side of the fish in the pit fish, the fish abrasionproof decreases salvage barrel 100 can be guided through milling shoe 40 to effectively guide the fish in the pit to inside lining salvage barrel 30, and then carry through locking piece 50 and smuggle secretly, accomplish and salvage. For the falling fish of the testing instrument, the instrument can be damaged by milling and salvaging a conventional steel wire salvaging barrel, the fishing barrel 100 capable of preventing the falling fish from being abraded can clean the top and the annular space of the falling fish, the thin-wall milling shoe 40 is used for milling and guiding the falling fish, the falling fish is entrained by a locking piece 50 formed by a flexible steel wire after the falling fish enters, and meanwhile, the falling fish is salvaged by a lining salvaging barrel 30 which does not rotate, so that the falling fish is effectively prevented from being damaged, and the falling fish is effectively protected. The fishing barrel 100 capable of preventing fish from being abraded is beneficial to enabling fine rod-shaped falling objects to enter fish through the milling shoes 40, the function of guiding the fish is achieved, multiple tripping operations caused by the fact that the falling fish cannot be accurately fished during operation are greatly reduced, the fishing success rate is greatly improved, the fishing efficiency is remarkably improved, and the fishing operation time is effectively shortened. The method not only can effectively shorten the operation time, but also can improve the economic benefit of enterprises and save the cost of later measures.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention in any way. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a fish abrasionproof decreases overshot which characterized in that includes:

an outer cylinder (20) having a shoulder (21) with a downward end surface on an inner wall surface thereof;

a lining overshot (30) concentrically arranged in the outer cylinder, the inner wall of the lining overshot is provided with a plurality of groups of locking pieces (50) which incline upwards,

a milling shoe (40) fixedly connected to the lower end of the outer cylinder;

wherein the up end of milling shoe with form annular groove (60) between the circular bead, the inside lining overshot is installed in the annular groove, and can for the urceolus rotates, the down fish abrasionproof decreases the overshot can go into the pit shaft and pass through the milling shoe will fall the fish in the pit to guide in the inside lining overshot, and pass through the locking piece forms the locking to the fish that falls in the pit, thereby can be through lifting the down fish abrasionproof decreases the overshot and salvages the fish that falls in the pit.

2. The fish anti-wear overshot of claim 1, wherein each set of locking elements comprises a plurality of flexible wires.

3. The fish anti-wear overshot of claim 2, characterized in that the angle of inclination between the locking element and the inner wall of the inner lining overshot is set in the range of 40 ° -50 °.

4. The fish anti-wear overshot of any one of claims 1-3, characterized in that two sets of locking elements are provided radially symmetrically at the same axial position of the inner liner overshot.

5. The fish anti-wear overshot of claim 4, wherein two axially adjacent sets of the locking elements of the inner liner overshot are circumferentially staggered.

6. The fish anti-wear overshot of claim 5, wherein two axially adjacent sets of the locking elements in the inner liner overshot are circumferentially staggered by an angle of not less than 25 °.

7. The fish anti-wear overshot of claim 1, characterized in that the milling shoe wall thickness is arranged in the range of 5-10 mm.

8. The fish anti-abrasion overshot of claim 1 or 7, characterized in that the inner wall surface of the lower end of the milling shoe is provided with a chamfer for guiding the falling fish down the well into the lining overshot.

9. The fish anti-wear overshot of claim 2, wherein the inner liner overshot is clearance fit with the annular groove.

10. The fish anti-wear overshot of claim 2, characterized in that an upper joint (10) is fixedly connected to the upper end of the outer cylinder, said upper joint being adapted to be connected to an upper drill rod.