CN202500533U

CN202500533U - Double-bellows gas lift valve with set pressure range value

Info

Publication number: CN202500533U
Application number: CN201120475652.2U
Authority: CN
Inventors: 马发明; 佘朝毅; 马辉运; 张华礼; 尹强; 王怀钊; 胡斌; 邓友超
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2011-11-25
Filing date: 2011-11-25
Publication date: 2012-10-24
Anticipated expiration: 2021-11-25

Abstract

The utility model discloses a set for dual bellows gas lift valve of pressure range value is that the pressure that can adapt to the oil gas well for the gas lift valve changes, maintains the purpose of longer gas lift time and designs, and it comprises low pressure control valve, single current valve and the high pressure control valve under the normally open state under the normally closed state, has two pressure values of filling nitrogen and setting for, closes when being less than to set for the low pressure or being higher than the highest pressure, and then opens in the pressure range of setting for. The gas lift valve can be suitable for the pressure change rule of an oil-gas well from high pressure to low pressure, can be in a closed state when the pressure of the oil-gas well is high, is favorable for liquid drainage of the oil-gas well, can be used for realizing the gas lift liquid drainage under low formation pressure, and saves the cost of repairing and checking the well; the risk of design failure can be reduced, the reliability of the gas lift device is improved, and the gas lift device is particularly suitable for oil and gas wells with incomplete basic design data such as exploratory wells.

Description

The bi-bellow gas lift valve of setting pressure value range

Technical field

The utility model relates to a kind of bi-bellow gas lift valve of setting pressure value range, belongs to the exploitation of oil-gas field field of engineering technology.

Background technology

At present; The gas lift valve that is usually used in oil recovery of gaslift technology or water pumping gas production both at home and abroad has bellows to fill the gas lift valve of nitrogen pressure operation, spring-operated or the two operate in conjunction; Wherein bellows fills nitrogen pressure operation gas lift valve and uses more generally, and the whole world has to surpass 20,000 and be applied in the produced on-site every year, and the common ground of these gas lift valves is: when pressure surpasses some setting values; Gas lift valve is in open mode, otherwise then is in closed condition.And in implementing the gaslift activities, along with the continuity of production time, the gas lift valve of the value of being set can not satisfy produces the needs that change; Because increase the operation of inspection valve; Trip out original gas lift valve, more renew valve, individual well inspection valve take from several ten thousand, hundreds of thousands extremely millions of units do not wait.

Summary of the invention

The purpose of the utility model is to provide a kind of bi-bellow gas lift valve of setting pressure value range, and its pressure that can adapt to the oil gas well changes, and in the range of pressure values of setting, works, and can keep the longer gaslift time, practices thrift well workover inspection valve cost.

The concrete technology contents of the utility model is following:

The utility model gas lift valve comprises the high pressure control valve under low-pressure control valve, ball-and-seat and the normally open under the normal off status.

Installing low pressure tail ball-and-seat stifled and the band sealing ring connects upper valve body; The middle valve body of upper valve body other end connecting band sealing ring; Be provided with the bellows component of dribbling valve in the middle valve body; The middle valve body other end is connected with the following valve body of radial direction through hole, is provided with sealing ring and valve seat 8 in the following valve body, and the following valve body other end connects ball-and-seat.

Establish the joint of ball valve, valve seat and sealing ring in the ball-and-seat other end connects, establish the urceolus of bellows component in the joint other end connects, the urceolus other end connects inner cavity chamber, and inner cavity chamber's other end connects the stifled ball-and-seat of installing high pressure tail.

What be positioned at the a-quadrant is ball-and-seat, and it is stifled after injecting low-pressure nitrogen, to load onto the low pressure tail, gets into to prevent extraneous high pressure draught.When pressure was lower than the design low voltage value, the low pressure bellows component propped up ball valve and drops in the valve seat, makes low-pressure control valve be in normally off; When pressure was higher than the low-pressure designs value, bellows component was by the application of force backward, moved the disengaging valve seat after dragging ball valve, and low-pressure control valve is opened, and air-flow gets into oil pipe from the radial direction through hole on the valve body down.

What be positioned at the B zone is ball-and-seat, after injecting high pressure nitrogen, loads onto plug, gets into to prevent extraneous high pressure draught.When pressure was lower than the design high-voltage value, the high pressure bellows component propped up ball valve and breaks away from valve seat, makes high pressure control valve be in normally open; When pressure was higher than the high pressure design load, bellows component was by the application of force backward, was moved back in the valve seat after dragging ball valve, and high pressure control valve is closed.

The utility model gas lift valve has two to fill the force value that nitrogen is set; When being lower than the setting minimum pressure or being higher than maximum pressure, close; In the pressure limit of setting, then open; Its superiority is: can be fit to oil gas well pressure pressure Changing Pattern from high to low, when oil gas well completion, can be lowered to gas lift valve, can guarantee that oil gas well gas lift valve when pressure is higher is in closed condition and helps oil gas well array liquid; Can guarantee simultaneously gas lift valve enforcement gaslift discharge opeing under low strata pressure again, and practice thrift well workover inspection valve cost.Two pressure limit control gas lift valves can reduce the risk of design failure, and the oil gas well that the basic engineering data such as reliability, particularly prospect pit of raising airlift unit are incomplete is all the more so.

The gas lift valve that the utility model is used for operation in two range of pressure values is mainly used in oil recovery of underground work technology gaslift technology or water pumping gas production; Be extraneous source of the gas to be injected into well replenish the gas well energy; Utilize the opening and closing of head of liquid control gas lift valve in the oil pipe; Replace step by step and near the hydrops of pit shaft and shaft bottom that gasifies, reduce pit shaft internal pressure gradient, recover gas well production.

Description of drawings

Fig. 1,2 is the bi-bellow gas lift valve structural representation of setting pressure value range.

Fig. 3,4 is the bi-bellow gas lift valve installation exercise sketch map of setting pressure value range.

The specific embodiment

Embodiment:

Embodiment referring to figs. 1 through 4 pairs of the utility model further specifies:

Low-pressure control valve is stifled 1 by the low pressure tail, ball-and-seat 2, upper valve body 3, middle valve body 4, bellows component 5, ball valve 6, valve body 7 and valve seat 8 are formed down; Installing low pressure tail stifled 1 also connects upper valve bodies 3 with the ball-and-seat 2 of sealing ring B1; The middle valve body 4 of upper valve body 3 other end connecting band sealing ring B2; Be provided with the bellows component 5 of dribbling valve 6 in the middle valve body 4; Middle valve body 4 other ends are connected with the following valve body 7 of radial direction through hole, are provided with sealing ring B3, B4 and valve seat 8 in the following valve body 7, and following valve body 7 other ends connect ball-and-seat 9.

High pressure control valve is made up of joint 10, ball valve 11, valve seat 12, urceolus 13, bellows component 14 and inner cavity chamber 15, ball-and-seat 16 and high pressure tail stifled 17; In connecting, establish ball-and-seat 9 other ends joint 10 of ball valve 11, valve seat 12, sealing ring B5 and sealing ring B6; In connecting, establish joint 10 other ends urceolus 13 of bellows component 14; Urceolus 13 other ends connect inner cavity chamber 15, and inner cavity chamber's 15 other ends connect the ball-and-seat 16 of installing high pressure tail stifled 17.

Fig. 3,4 is depicted as the carrier that fills nitrogen pressure operation gas lift valve through the special bi-bellow of two public oil pipe short circuits; The bi-bellow gas lift valve of setting pressure value range can be installed in before going into the well on this carrier, has the hole of the high pressure control valve end on a hole and the gas lift valve relative on the oil pipe.(low pressure can design at 1～24MPa when pressure is within the design load scope; High pressure can design 2～25MPa); Air-flow can get into gas lift valve through the C place, gets into oil pipe in the hole through the high voltage control end, and then air-flow can not get into oil pipe through gas lift valve when pressure is not within scope of design.

Claims

1. the bi-bellow gas lift valve of a setting pressure value range comprises the high pressure control valve under low-pressure control valve, ball-and-seat and the normally open under the normal off status, it is characterized in that:

Installing low pressure tail stifled (1) also connects upper valve body (3) with the ball-and-seat (2) of sealing ring (B1); The middle valve body (4) of upper valve body (3) other end connecting band sealing ring (B2); Be provided with the bellows component (5) of dribbling valve (6) in the middle valve body (4); Middle valve body (4) other end is connected with the following valve body (7) of radial direction through hole, is provided with sealing ring (B3, B4) and valve seat (8) in the following valve body (7), and following valve body (7) other end connects ball-and-seat (9);

In connecting, establishes ball-and-seat (9) other end joint (10) of ball valve (11), valve seat (12), sealing ring (B5, B6); In connecting, establishes joint (10) other end urceolus (13) of bellows component (14); Urceolus (13) other end connects inner cavity chamber (15), and inner cavity chamber (15) other end connects the ball-and-seat (16) of installing high pressure tail stifled (17).