CN115749666A

CN115749666A - Underground ratchet type blanking plug

Info

Publication number: CN115749666A
Application number: CN202211352971.3A
Authority: CN
Inventors: 江源; 刘宇航; 王月纯; 易德正; 兰瑞洪; 漆文龙; 邓悟; 刘睿; 刘晓东; 张瀚韬; 杨磊; 赖宁; 罗伟; 程纯勇; 廖毅
Original assignee: Sichuan Shengnuo Oil And Gas Engineering Technology Service Co ltd
Current assignee: Sichuan Shengnuo Oil And Gas Engineering Technology Service Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-03-07
Anticipated expiration: 2042-11-01
Also published as: CN115749666B

Abstract

The invention belongs to the technical field of oil and gas equipment, and discloses an underground ratchet type blanking plug which comprises a clamping working cylinder, wherein the clamping working cylinder is connected with an oil pipe, two floating ratchet fixture blocks are oppositely arranged in the clamping working cylinder, the lower end of the clamping working cylinder is in threaded connection with a clamping joint, and the upper end of the clamping joint is abutted against the floating ratchet fixture blocks; the middle part of the blocking rod is annularly provided with a V-shaped sealing ring, and the lower part of the blocking rod is provided with a fixed ratchet matched with the floating ratchet clamping block. According to the underground ratchet type blanking plug provided by the invention, the clamping working barrel is connected to the bottom of an oil pipe in advance, and when the oil pipe needs to be replaced subsequently, a feeding tool is used for throwing the plugging rod, and the plugging rod is connected with the clamping working barrel, so that the V-shaped sealing ring blocks the oil pipe, the problem that the blanking plug is blocked in the process of lowering the large-size blanking plug is avoided, and the passing performance of the blanking plug is improved.

Description

Underground ratchet type blanking plug

Technical Field

The invention belongs to the technical field of oil and gas equipment, and particularly relates to an underground ratchet type blanking plug.

Background

Most of the existing mechanical type blanking plugs in the oil pipes are manually steel wires which are sent into the oil pipes, the effect of plugging the ground pressure is difficult to play in the lowering process due to the fact that factors such as large size of the blanking plugs are difficult to be lowered to the designed depth, and a new blanking plug is urgently needed to be designed for achieving operation of a gas production well under pressure.

Disclosure of Invention

The present invention aims to solve the above technical problem at least to some extent. Therefore, the invention aims to provide a downhole ratchet type blanking plug.

The technical scheme adopted by the invention is as follows:

a downhole ratcheted plug comprising:

the clamping working cylinder is connected with the oil pipe, two floating ratchet fixture blocks are oppositely arranged in the clamping working cylinder, the lower end of the clamping working cylinder is in threaded connection with the clamping joint, and the upper end of the clamping joint is abutted to the floating ratchet fixture blocks;

the middle part of the blocking rod is annularly provided with a V-shaped sealing ring, and the lower part of the blocking rod is provided with a fixed ratchet matched with the floating ratchet clamping block.

Preferably, the inside of card work section of thick bamboo is equipped with the round seal groove, is equipped with the round boss on the jam stick, and the V type sealing washer is located on the outer periphery of boss, and the V type sealing washer is sealed with the seal groove cooperation.

Preferably, a downward mounting groove is formed in the clamping working barrel, and the upper end of the floating ratchet clamping block is movably mounted in the mounting groove.

Preferably, an annular space is arranged in front of the outer wall of the upper part of the clamping joint and the inner wall of the clamping working barrel, the lower end of the floating ratchet clamping block is movably arranged in the annular space, a step is convexly arranged in the middle of the floating ratchet clamping block, and the upper end of the clamping joint is abutted against the lower surface of the step.

Preferably, the blocking rod is provided with a releasing pin hole.

The beneficial effects of the invention are as follows:

according to the underground ratchet type blanking plug provided by the invention, the bottom of the oil pipe is connected with the clamping working cylinder in advance, when the oil pipe needs to be replaced subsequently, the blocking rod is put into the feeding tool and is connected with the clamping working cylinder, so that the V-shaped sealing ring blocks the oil pipe, the problem that the large-size blanking plug is blocked in the lowering process is avoided, and the trafficability of the blanking plug is improved.

Drawings

FIG. 1 is a schematic view of a downhole ratcheted plug according to the present invention.

Fig. 2 is a sectional view of the engagement cylinder of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a cross-sectional view of a stopper rod of the present invention.

In the figure: 1-a sleeve; 2-clamping the working barrel; 3-floating ratchet clamping block; 4-a clamping joint; 5-mounting grooves; 6-a stopper rod; 7-V type seal ring; 8-fixed ratchet; 9-a sealing groove; 10-boss; 11-releasing pin hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

As shown in fig. 1 to 4, the downhole ratchet type blanking plug of the embodiment comprises a clamping working cylinder 2 and a plugging rod 6, wherein the clamping working cylinder 2 is connected to an oil pipe through a coupling and is lowered into a casing 1 along with the oil pipe, two floating ratchet fixture blocks 3 are arranged in the clamping working cylinder 2 relatively, the lower end of the clamping working cylinder 2 is in threaded connection with a clamping joint 4, and the upper end of the clamping joint 4 is abutted to the floating ratchet fixture blocks 3; as shown in fig. 2 and 3, a downward mounting groove 5 is formed in the locking cylinder 2, the upper end of the floating ratchet latch 3 is movably mounted in the mounting groove 5, and the upper end of the floating ratchet latch 3 can move left and right. An annular space is arranged in front of the outer wall of the upper part of the clamping joint 4 and the inner wall of the clamping working barrel 2, the lower end of the floating ratchet clamping block 3 is movably arranged in the annular space, and the lower end of the floating ratchet clamping block 3 can move left and right. The protruding step that is equipped with in the middle part of the ratchet fixture block 3 that floats, the upper end and the step lower surface butt of card joint 4, the upper surface of step and card work drum 2 have the clearance to the whole activity from top to bottom that can of the ratchet fixture block 3 that floats, nevertheless because the spacing of mounting groove 5 and annular space, the ratchet fixture block that floats can not drop all the time, only can move about in the design range.

The inside of the clamping working cylinder 2 is provided with a circle of sealing groove 9, the plugging rod 6 is provided with a circle of boss 10, the V-shaped sealing ring 7 is annularly arranged on the outer circumferential surface of the boss 10, and the V-shaped sealing ring 7 is matched and sealed with the sealing groove 9. The lower part of the blocking rod 6 is provided with a fixed ratchet 8 matched with the floating ratchet clamping block 3, and the floating ratchet clamping block 3 is designed in a floating mode and has a certain moving range in the up-down direction and the left-right direction, so that the connection between the fixed ratchet 8 and the floating ratchet clamping block 3 is facilitated, and the blocking rod 6 can only move downwards and cannot move upwards due to the matching relation between the fixed ratchet 8 and the floating ratchet clamping block 3.

The blocking rod 6 is provided with a releasing pin hole 11, the releasing pin hole 11 is used for being connected with a feeding tool to lower the blocking rod, and the lower end of the blocking rod 6 is chamfered.

According to the downhole ratchet type blanking plug, the floating ratchet fixture block 3 and the clamping joint 4 are connected to the bottom of an oil pipe in advance through the clamping working cylinder 2, the plugging rod 6 is lowered from the oil pipe through a feeding tool, the fixed ratchet 8 on the plugging rod is connected with the floating ratchet fixture block, and the V-shaped sealing ring 7 is matched with the sealing groove 9 to block the clamping working cylinder 2, so that the oil pipe is sealed.

The present invention is not limited to the above-mentioned alternative embodiments, and any other various products can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, all of which fall within the scope of the present invention, fall within the protection scope of the present invention.

Claims

1. A downhole ratcheted plug, comprising:

the clamping device comprises a clamping working cylinder (2), wherein the clamping working cylinder (2) is connected with an oil pipe, two floating ratchet clamping blocks (3) are oppositely arranged in the clamping working cylinder (2), the lower end of the clamping working cylinder (2) is in threaded connection with a clamping joint (4), and the upper end of the clamping joint (4) is abutted against the floating ratchet clamping blocks (3);

the middle part of the blocking rod (6) is annularly provided with a V-shaped sealing ring (7), and the lower part of the blocking rod (6) is provided with a fixed ratchet (8) matched with the floating ratchet clamping block (3).

2. The downhole ratcheted plug according to claim 1, wherein: the locking device is characterized in that a circle of sealing groove (9) is formed in the clamping working barrel (2), a circle of boss (10) is arranged on the blocking rod (6), the V-shaped sealing ring (7) is arranged on the outer circumferential surface of the boss (10), and the V-shaped sealing ring (7) is matched and sealed with the sealing groove (9).

3. The downhole ratcheted plug according to claim 1, wherein: the clamping working barrel (2) is internally provided with a downward mounting groove (5), and the upper end of the floating ratchet clamping block (3) is movably mounted in the mounting groove (5).

4. The downhole ratcheted plug of claim 3, wherein: an annular space is arranged in front of the outer wall of the upper portion of the clamping joint (4) and the inner wall of the clamping working barrel (2), the lower end of the floating ratchet clamping block (3) is movably mounted in the annular space, a step is convexly arranged in the middle of the floating ratchet clamping block (3), and the upper end of the clamping joint (4) is abutted to the lower surface of the step.

5. The downhole ratcheted plug of claim 1, wherein: the blocking rod (6) is provided with a releasing pin hole (11).

6. The downhole ratcheted plug according to claim 1, wherein: the lower end of the blocking rod (6) is chamfered.