CN211230807U

CN211230807U - Sealed drainage gas production plunger of natural gas well

Info

Publication number: CN211230807U
Application number: CN201922185464.5U
Authority: CN
Inventors: 燕迎飞; 唐永槐; 姚军; 展转盈; 万鑫
Original assignee: Shaanxi Yanchang Petroleum Group Co Ltd
Current assignee: Shaanxi Yanchang Petroleum Group Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-08-11
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to an oil gas field gas production technical field, concretely relates to natural gas well's drainage gas production plunger. A sealed water drainage gas production plunger of a natural gas well comprises a plunger main body, wherein a fishing neck is movably mounted at the top of the plunger main body, a plunger seat is movably mounted at the bottom of the plunger main body, and an elastic part is arranged on the outer wall of the plunger main body in a surrounding manner; the size of the elastic component is larger than the distance from the outer wall of the plunger main body to the inner wall of the gas well. The utility model discloses a salvage neck is installed on the plunger top and can be used for salvaging for the practicality of plunger main part strengthens, the utility model discloses the canned type drainage gas production plunger of natural gas well's structure workable, easy realization can adjust the length that increases brush quantity and plunger major structure in a flexible way, in order to be applicable to the environment of different drainage gas productions.

Description

Sealed drainage gas production plunger of natural gas well

Technical Field

The utility model relates to an oil gas field gas production technical field, but it is for being applied to the gas well drainage gas production instrument of reuse in the natural gas production process, concretely relates to canned type drainage gas production plunger of natural gas well.

Background

With the continuous development of gas fields, some gas wells enter a middle and later production stage with low pressure and low yield, the gas wells cannot meet the requirement of minimum liquid carrying flow, the bottom hole energy is not enough to carry liquid produced by a gas formation to the ground, and liquid accumulation is continuously generated at the bottom hole and a shaft, so that the self-blowing capacity of the gas wells is continuously reduced. If this situation continues, the accumulated fluid column in the wellbore eventually drowns the gas well, causing the gas well to be shut down, resulting in significant economic loss. Drainage and gas production are effective methods for solving 'gas well liquid accumulation', and are one of important measures for excavating the production potential of a water-producing gas well and improving the recovery ratio. The plunger gas lift is a special form of intermittent gas lift, is also a door mechanical gas production technology, and fully utilizes the self energy of a gas well to push the plunger to reciprocate in an oil pipe so as to realize periodic liquid lift.

At present, in various gas fields at home and abroad, the application range of a plunger widely used in a plunger gas lift drainage gas production technology is limited, and the problem of liquid accumulation of a natural gas well in some special environments cannot be solved. In recent years, with continuous development of gas fields, the number of natural gas wells in special environments is increased year by year, liquid accumulation is generated at the bottoms of wells and shafts of partial gas wells, and the conventional plunger structure cannot meet the requirements of lifting and production.

Disclosure of Invention

The utility model aims at overcoming the limitation of conventional plunger application scope, can not satisfy the shortcoming that the natural gas well in the special environment lifted and the production required, design the drainage gas production plunger of the natural gas well that can salvage, workable, easily realize, application scope is wide.

The utility model discloses an implementation does:

a sealed water drainage gas production plunger of a natural gas well comprises a plunger main body, wherein a fishing neck is movably mounted at the top of the plunger main body, a plunger seat is movably mounted at the bottom of the plunger main body, and an elastic part is arranged on the outer wall of the plunger main body in a surrounding manner; the size of the elastic component is larger than the distance from the outer wall of the plunger main body to the inner wall of the gas well. The design structure that the elastic component is installed on the periphery of the plunger main body is beneficial to reducing gas slippage and liquid fall back, and the sealing performance of the plunger main body is improved.

Preferably, the top of the plunger body is connected with a fishing neck through threads, and the bottom of the plunger body is connected with a plunger seat through threads.

Preferably, the elastic member is a brush.

The application range of the plunger main body can be enlarged by installing the hairbrush structure on the periphery of the plunger main body, and the hairbrush can play a cleaning role on the inner wall of the natural gas well, so that the plunger main body can also be suitable for an oil pipe damage gas well.

Preferably, the number of the hairbrushes is 3, and the 3 hairbrushes are all spiral type.

Preferably, the brush is a spiral-processed acid-resistant soft nylon brush.

The brush is made of an acid-resistant soft nylon material processed spirally, and the structure can realize that the plunger piston ascends or descends in the sulfur-containing gas well and is used for drainage and gas production of the sulfur-containing gas well.

Preferably, the plunger body, the fishing neck and the plunger seat are all made of nickel-based alloy materials.

The plunger body, the fishing neck and the plunger seat are made of nickel-based alloy materials, so that the plunger can ascend or descend in the sulfur-containing gas well and is used for drainage and gas production of the sulfur-containing gas well.

The utility model has the advantages that:

the utility model discloses a salvage neck is installed on the plunger top and can be used for salvaging for the practicality of plunger main part strengthens, the utility model discloses the canned type drainage gas production plunger of natural gas well's structure workable, easy realization can adjust the length that increases brush quantity and plunger major structure in a flexible way, in order to be applicable to the environment of different drainage gas productions.

Drawings

FIG. 1 is an elevation view of a sealed drainage gas production plug for a gas well.

Reference numerals: 1-plunger body, 2-fishing neck, 3-elastic component and 4-plunger seat.

Detailed Description

Example 1

A sealed drainage gas production plunger of a natural gas well comprises a plunger main body 1, wherein the top of the plunger main body 1 is movably provided with a fishing neck 2, the bottom of the plunger main body 1 is movably provided with a plunger seat 4, and the outer wall of the plunger main body 1 is provided with an elastic component 3 in a surrounding manner; the size of the elastic component 3 is larger than the distance from the outer wall of the plunger body 1 to the inner wall of the gas well.

The specific process of this embodiment is as follows:

the first step is the upward movement of the plunger body 1: after a gas well is opened, a sealed drainage gas production plunger body 1 of the natural gas well passes through a gas-liquid medium in an oil pipe under the action of gravity and falls to the position above a plunger seat 4; the outer wall of the plunger main body 1 is provided with the elastic component 3 in a surrounding mode, the size of the elastic component 3 is larger than the distance from the outer wall of the plunger main body 1 to the inner wall of a gas well, the design structure that the elastic component 3 is installed on the periphery of the plunger main body is favorable for reducing gas slippage and liquid fall back, and the sealing performance of the plunger main body is improved. At the moment, the plunger body 1 and the elastic part 3 arranged on the outer wall form a sealing interface in the oil pipe, the gas below cannot pass through the plunger body 1, the gas is gathered below the plunger body 1, and when the energy is increased to a certain degree, the gas pushes the plunger body 1 to move; the second step is that the plunger body 1 goes down: the sealed drainage gas production plunger body 1 of the natural gas passes through a gas-liquid medium in an oil pipe to fall under the action of the gravity of the plunger body and starts the next cycle when the plunger body reaches the position above the plunger seat 4; a sealed water drainage and gas production plunger of a natural gas well reciprocates in an oil pipe by utilizing the self energy of the gas well to realize periodic liquid lifting.

Example 2

The utility model provides a canned type drainage gas production plunger of natural gas well, including plunger main part 1, threaded connection has salvage neck 2 at the top of plunger main part 1, threaded connection has plunger seat 4 through threaded connection in the bottom of plunger main part 1, the outer wall of plunger main part 1 encircles and is equipped with 3 brushes, the brush is the soft nylon brush of acid resistance of spiral processing, can increase the application scope of plunger main part at the peripheral installation brush structure of plunger main part, the brush can play cleaning action to natural gas well inner wall, make plunger main part also can be applicable to oil pipe damage gas well, the brush adopts spiral processing's the soft nylon material of acid resistance, can realize that the plunger goes upward or down at the gas well that contains sulphur, a drainage gas production for containing the gas well. The plunger main body 1, the fishing neck 2 and the plunger seat 4 are all made of nickel-based alloy materials, so that the plunger main body 1 can move upwards or downwards in the sulfur-containing gas well, and the plunger seat can be suitable for periodic liquid lifting in the sulfur-containing gas well.

The utility model discloses the canned type drainage gas production plunger of well gas well can adjust the structure length who increases 3 quantity of elastomeric element and plunger main part 1 in a flexible way to be applicable to the environment of different drainage gas production.

Claims

1. The utility model provides a canned type drainage gas production plunger of natural gas well, includes plunger main part (1), its characterized in that: the fishing neck (2) is movably mounted at the top of the plunger main body (1), the plunger seat (4) is movably mounted at the bottom of the plunger main body (1), and the elastic part (3) is arranged on the outer wall of the plunger main body (1) in a surrounding manner; the size of the elastic component (3) is larger than the distance from the outer wall of the plunger body (1) to the inner wall of the gas well.

2. The sealed drainage gas production plug for a gas well as set forth in claim 1, wherein: the top of the plunger main body (1) is connected with a fishing neck (2) through threads, and the bottom of the plunger main body (1) is connected with a plunger seat (4) through threads.

3. The sealed drainage gas production plug for a gas well as set forth in claim 2, wherein: the elastic component (3) is a brush.

4. The sealed drainage gas production plug for a gas well as set forth in claim 3, wherein: the hairbrush is 3, and 3 hairbrushes are the screw type.