CN219366022U

CN219366022U - Flexible weighting rod

Info

Publication number: CN219366022U
Application number: CN202320913648.2U
Authority: CN
Inventors: 曹更顺; 王志遵; 于敦源; 李秉钧
Original assignee: DONGYING MINGDE PETROLEUM TECHNOLOGY CO LTD
Current assignee: DONGYING MINGDE PETROLEUM TECHNOLOGY CO LTD
Priority date: 2023-04-21
Filing date: 2023-04-21
Publication date: 2023-07-18
Anticipated expiration: 2033-04-21

Abstract

The utility model relates to an auxiliary device for petroleum underground test, in particular to a flexible weighting rod. The technical proposal is as follows: the upper end of the weighting rod is connected with a rope cap, and the lower end of the weighting rod is connected with a lower joint, wherein each section of weighting rod consists of a tungsten rod and an outer barrel and is movably connected through a ball stud; a tungsten rod is arranged in the inner cavity of the outer cylinder, the upper end of the tungsten rod is connected with one end of a ball stud through a second connecting sleeve, the other end of the ball stud adopts a ball structure and is arranged in a limiting ring at the lower end of the other section of weighting rod to form a universal flexible connection structure; the lower end of the rope cap is provided with a secondary salvaging neck and a first connecting sleeve, and the lower side of the secondary salvaging neck is connected with the upper end of the first connecting sleeve. The beneficial effects are that: the universal deflection of the weighting rod can be realized, and the steel wire operation is performed in the bent oil pipe and the directional well, so that the well is conveniently lowered; in addition, if the flexible weighting rod is clamped during working in the well, the secondary fishing neck is grabbed by a re-entering fishing tool, so that the weighting rod is conveniently fished out.

Description

Flexible weighting rod

Technical Field

The utility model relates to an auxiliary device for petroleum underground test, in particular to a flexible weighting rod.

Background

In the underground test work of the petroleum industry, a common weighting rod is divided into a rigid weighting rod and a flexible weighting rod, and the main function of the weighting rod is to increase the weight of a test instrument which goes into the well, so that the test instrument goes into the well smoothly; wherein, the rigid weighting rod is adopted, so that the accidents of well clamping and well falling frequently occur during the operations such as annulus test or casing deformation test; therefore, the existing flexible weighting rod cannot meet the requirements of a bent oil pipe and a directional well such as a horizontal well when the existing flexible weighting rod is used for being lowered into the well, so that the existing flexible weighting rod cannot be lowered into the well; in addition, when the flexible weighting rod is blocked and needs to be salvaged, the existing flexible weighting rod is difficult to operate and salvage, and even serious underground accidents occur.

Disclosure of Invention

The utility model aims at overcoming the defects in the prior art, and provides the flexible weighting rod, which is connected with a plurality of sections of weighting rods through ball bolts, so that the angle deflection of the weighting rods can be realized, and the adjustment of the tool string to be consistent with the inclination direction of an oil pipe is facilitated, so that the tool string can be conveniently lowered into a well; in addition, if the flexible weighting rod is clamped during the working in the well, the secondary fishing neck is grabbed by the lower fishing tool, so that the device is conveniently fished out.

The utility model relates to a flexible weighting rod, which adopts the technical scheme that: the self-locking type ball joint comprises a rope cap (10), a plurality of sections of weighting rods and a lower joint (9), wherein the upper end of each weighting rod is connected with the rope cap (10), the lower end of each weighting rod is connected with the lower joint (9), and each section of weighting rod consists of a tungsten rod (6) and an outer barrel (7) and is movably connected through a ball stud (4); a tungsten rod (6) is arranged in the inner cavity of the outer cylinder (7), the upper end of the tungsten rod (6) is connected with one end of a ball stud (4) through a second connecting sleeve (5), the other end of the ball stud (4) adopts a ball structure, and the ball stud is arranged in a limiting ring (8) at the lower end of the other section of weighting rod to form a universal flexible connection structure; the lower extreme at rope cap (10) is equipped with secondary salvage neck (1) and first adapter sleeve (3), the downside of secondary salvage neck (1) is connected in the upper end of first adapter sleeve (3).

Preferably, the rope cap (10) comprises an upper connector (10.1), a buffer spring (10.2), an upper connector main body (10.3) and a compression ring (10.4), wherein the upper connector (10.1) is arranged at the top of the upper connector main body (10.3), the buffer spring (10.2) and the compression ring (10.4) are arranged in the inner cavity of the rope cap (10), the upper end of the compression ring (10.4) is contacted with the buffer spring (10.2), and the lower end of the compression ring (10.4) is contacted with the secondary fishing neck (1); the lower end of the upper joint main body (10.3) is connected with the secondary salvaging neck (1) through a shear screw (2).

Preferably, a ball stud (4) is mounted at the lower end of the first connecting sleeve (3).

Preferably, an elastic cylindrical pin (11) is arranged on the upper portion of the outer cylinder (7), and the elastic cylindrical pin (11) sequentially penetrates through the outer cylinder (7), the second connecting sleeve (5) and the ball stud (4) from outside to inside.

Preferably, the second connecting sleeve (5) is fixedly connected with the outer cylinder (7) through a screw (12).

Preferably, the length of each weighting rod is 20-26cm, and the shape of each weighting rod is cylindrical.

The beneficial effects of the utility model are as follows: the upper end of the utility model is a rope cap, the lower end is a lower joint, the middle is provided with a plurality of weighting rods filled with tungsten rods, the weighting rods are connected with each other through ball bolts, and the angle deflection of the weighting rods can be realized, so that the adjustment of the inclination direction of a tool string and an oil pipe is consistent, and the tool string is convenient for descending the well, especially when steel wire operation is carried out in a bent oil pipe and a directional well; in addition, if the flexible weighting rod is clamped during the operation in the well, the shearing screw between the rope cap and the weighting rod is sheared, so that the releasing is realized, and then the secondary fishing neck is grasped by the fishing tool, so that the device is conveniently fished out.

Drawings

FIG. 1 is a schematic view of the structure of the upper half of the present utility model;

FIG. 2 is a schematic view of the lower part of the present utility model;

fig. 3 is a schematic structural view of the rope cap portion;

FIG. 4 is a schematic illustration of the connection of ball stud portions;

in the upper graph: the device comprises a salvaging neck 1, a shearing screw 2, a first connecting sleeve 3, a ball stud 4, a second connecting sleeve 5, a tungsten rod 6, an outer cylinder 7, a limiting ring 8, a lower connector 9, a rope cap 10, an elastic cylindrical pin 11, a screw 12, an upper connector 10.1, a buffer spring 10.2, an upper connector main body 10.3 and a compression ring 10.4.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

1, referring to fig. 1-4, the flexible weighting rod comprises a rope cap 10, three sections of weighting rods and a lower joint 9, wherein the upper end of each weighting rod is connected with the rope cap 10, the lower end of each weighting rod is connected with the lower joint 9, and each section of weighting rod consists of a tungsten rod 6 and an outer barrel 7 and is movably connected through a ball stud 4; a tungsten rod 6 is arranged in the inner cavity of the outer barrel 7, the upper end of the tungsten rod 6 is connected with one end of a ball stud 4 through a second connecting sleeve 5, the other end of the ball stud 4 adopts a ball structure and is arranged in a limiting ring 8 at the lower end of the other section of weighting rod to form a universal flexible connection structure; the lower end of the rope cap 10 is provided with a secondary salvaging neck 1 and a first connecting sleeve 3, and the lower side of the secondary salvaging neck 1 is connected with the upper end of the first connecting sleeve 3.

Referring to fig. 3, the rope cap 10 of the present utility model comprises an upper connector 10.1, a buffer spring 10.2, an upper connector body 10.3 and a compression ring 10.4, wherein the upper connector 10.1 is arranged at the top of the upper connector body 10.3, the buffer spring 10.2 and the compression ring 10.4 are arranged in the inner cavity of the rope cap 10, the upper end of the compression ring 10.4 is contacted with the buffer spring 10.2, and the lower end of the compression ring 10.4 is contacted with the secondary fishing neck 1; the lower end of the upper joint body 10.3 is connected with a secondary fishing neck 1 through a shear screw 2.

The ball stud 4 is mounted at the lower end of the first connecting sleeve 3, so that adjustment of multiple angles can be achieved, angle deflection of the weighting rod can be achieved, and accordingly adjustment of tool strings and oil pipe inclination direction consistency are facilitated, and particularly when steel wire operation is conducted in a bent oil pipe and a directional well, the tool strings and the oil pipe are convenient to descend.

In addition, the elastic cylindrical pin 11 is arranged on the upper portion of the outer barrel 7, and the elastic cylindrical pin 11 sequentially penetrates through the outer barrel 7, the second connecting sleeve 5 and the ball stud 4 from outside to inside, so that the connection strength can be better improved, and the situation that the elastic cylindrical pin is broken when salvaged is avoided.

The second connecting sleeve 5 and the outer cylinder 7 are fixedly connected through screws 12, the length of each weighting rod is 20-26cm, and the shape of each weighting rod is cylindrical; in addition, the tungsten rod, that is, the tungsten alloy rod, is used for weight control and weight distribution, mainly playing a role of weight balancing, because the tungsten alloy rod has high density.

When the utility model is used, as the upper end of the utility model adopts the disc spring type rope cap, the lower end is the lower joint, and the middle is provided with the weighting rods of three sections of filling tungsten bars, which are mutually connected through the ball stud, the utility model is put into a well, and as the length of each section of weighting rod is 20-26cm, the angle deflection of the weighting rods can be realized through the ball stud connection between each section of weighting rod, so as to be beneficial to adjusting the tool string to be consistent with the inclination direction of the oil pipe, and the underground test work can be carried out in the bent oil pipe and the directional well; in addition, if the flexible weighting rod is blocked when working in the well, the shearing screw between the rope cap and the weighting rod is sheared, the rope cap is lifted up to be released, at the moment, the secondary salvage neck is exposed, and then a salvage tool is put into again to grasp the secondary salvage neck, so that three weighting rods connected below the secondary salvage neck are salvaged.

The embodiment 2 of the utility model relates to a flexible weighting rod, which comprises a rope cap 10, a plurality of sections of weighting rods and a lower joint 9, wherein the upper end of each weighting rod is connected with the rope cap 10, the lower end of each weighting rod is connected with the lower joint 9, and each section of weighting rod consists of a tungsten rod 6 and an outer barrel 7 and is movably connected through a ball stud 4; a tungsten rod 6 is arranged in the inner cavity of the outer barrel 7, the upper end of the tungsten rod 6 is connected with one end of a ball stud 4 through a second connecting sleeve 5, the other end of the ball stud 4 adopts a ball structure and is arranged in a limiting ring 8 at the lower end of the other section of weighting rod to form a universal flexible connection structure; the lower end of the rope cap 10 is provided with a secondary salvaging neck 1 and a first connecting sleeve 3, and the lower side of the secondary salvaging neck 1 is connected with the upper end of the first connecting sleeve 3.

The difference from example 1 is that:

according to the underground test requirement, the flexible weighting rod can be formed by connecting four or more sections of weighting rods, and the length of each section of weighting rod can be manufactured according to the actual working condition, so that the underground test work in a bent oil pipe and a directional well is satisfied.

The above description is of the preferred embodiments of the present utility model, and any person skilled in the art may modify the present utility model or make modifications to the present utility model with the technical solutions described above. Therefore, any simple modification or equivalent made according to the technical solution of the present utility model falls within the scope of the protection claimed by the present utility model.

Claims

1. The utility model provides a flexible aggravates pole, includes rope cap (10), multisection aggravates pole, lower clutch (9), aggravates the upper end of pole and connects rope cap (10), and lower clutch (9), characterized by are connected to the lower extreme: each section of weighting rod is composed of a tungsten rod (6) and an outer cylinder (7) and is movably connected through a ball stud (4); a tungsten rod (6) is arranged in the inner cavity of the outer cylinder (7), the upper end of the tungsten rod (6) is connected with one end of a ball stud (4) through a second connecting sleeve (5), the other end of the ball stud (4) adopts a ball structure, and the ball stud is arranged in a limiting ring (8) at the lower end of the other section of weighting rod to form a universal flexible connection structure; the lower extreme at rope cap (10) is equipped with secondary salvage neck (1) and first adapter sleeve (3), the downside of secondary salvage neck (1) is connected in the upper end of first adapter sleeve (3).

2. The flexible weighting rod of claim 1, wherein: the rope cap (10) comprises an upper connector (10.1), a buffer spring (10.2), an upper connector main body (10.3) and a compression ring (10.4), wherein the upper connector (10.1) is arranged at the top of the upper connector main body (10.3), the buffer spring (10.2) and the compression ring (10.4) are arranged in the inner cavity of the rope cap (10), the upper end of the compression ring (10.4) is in contact with the buffer spring (10.2), and the lower end of the compression ring (10.4) is in contact with the secondary fishing neck (1); the lower end of the upper joint main body (10.3) is connected with the secondary salvaging neck (1) through a shear screw (2).

3. The flexible weighting rod of claim 2, wherein: the lower end of the first connecting sleeve (3) is provided with a ball stud (4).

4. A flexible weighting rod according to claim 3, characterized in that: an elastic cylindrical pin (11) is arranged on the upper portion of the outer barrel (7), and the elastic cylindrical pin (11) sequentially penetrates through the outer barrel (7), the second connecting sleeve (5) and the ball stud (4) from outside to inside.

5. The flexible weighting rod of claim 4, wherein: the second connecting sleeve (5) is fixedly connected with the outer cylinder (7) through a screw (12).

6. The flexible weighting rod of claim 5, wherein: the length of each weighting rod is 20-26cm.