CN202360063U

CN202360063U - Automatic degassing and recovering device for oil well casing

Info

Publication number: CN202360063U
Application number: CN201120442055XU
Authority: CN
Inventors: 龚淑霞; 龚淑滨; 何庆勇; 王海凤; 寇素萍; 张华英; 刘晓峰; 魏长林
Original assignee: 龚淑霞
Priority date: 2011-11-10
Filing date: 2011-11-10
Publication date: 2012-08-01
Anticipated expiration: 2021-11-10

Abstract

An automatic degassing and recovering device for an oil well casing comprises a production tree, a production gate, a casing gate, a back pressure gate, a gettering pipe, an oil outlet check valve and a gettering check valve, and is characterized in that the oil outlet check valve for avoiding backflow of oil gas in an oil collection pipeline is arranged on an oil outlet pipeline between the production gate and the back pressure gate; the gettering pipe connected with an outlet of the casing gate is arranged on a connecting pipe between the production gate and the check valve for avoiding backflow of the oil gas in the oil collection pipeline; and the gettering check valve for preventing raw oil flowing out of the production gate from flowing back to the casing is arranged on the gettering pipe. The automatic degassing and recovering device has a simple structure, can be used for automatically recovering gas of the casing in an on-line manner; and recovered gas in the casing can enter the oil collection pipeline along with the produced oil, so that water power loss of the oil collection pipeline can be reduced, back pressure and load of an oil pumping unit can be reduced, and electrical energy can be saved.

Description

Oil well casing automatic deflation automatic recycling device

Technical field

The utility model relates to a kind of oil well casing automatic deflation automatic recycling device that improves rod-pumped well producing fluid level, raising bottom pressure, improves oil well pump coefficient of fullness and raising pump efficiency.

Background technology

The rod-pumped well of some high oil-gas ratioes of oil field, in actual production, cause rod-pumped well to produce because of casing pressure is too high undesired, oil well pump feed flow deficiency, gas lock often takes place, that sky is taken out pump efficiency is low; Main cause is that casing pressure is high more, and the gas of oil casing annular space is more, producing fluid level is low more, owing to can not in time put sleeve pipe gas; Just do not had producing fluid level, the tail pipe bottom is gas entirely, and the oil on compacting stratum can not arrive the shaft bottom; Make gas get into tail pipe, cause that standing valve do not open, cause oil well pump to find time.Casing pressure is high more in addition, can make the free gas in the crude oil that gets into the shaft bottom can not get into oil casing annular space, can only get into tail pipe with oil; Make the slug flow that produces one section gas of one section oil in the tail pipe, cause standing valve in time not open, open back gas and just get into pump barrel; When descent of piston, cause travelling valve in time not open, produce gas lock; Cause that piston rotation perdurability accelerates suddenly, clash into the oil level in the pump barrel suddenly, produce momentum; Want the pressure of big hundreds of times because of the momentum weight/power ratio and can cause rod parting or oil pipe dropout, tubing string leakage.Therefore reduce casing pressure, improve dynamic liquid level height and be the key of the ordinary production of the rod-pumped well that guarantees high oil ratio.Putting sleeve pipe gas is unique measure.If sleeve gas is put into atmosphere, pollute the environment, waste energy and, the gathering line back pressure is increased surface gathering and transferring produce power loss, also can influence the ordinary production of oil well.

Summary of the invention

The order of the utility model provides a kind of oil well casing automatic deflation automatic recycling device, overcomes the defective that above-mentioned prior art exists, and guarantees the ordinary production of the rod-pumped well of high oil-gas ratio.

The technical scheme of the utility model realizes in the following manner:

The utility model comprises production tree, produces gate, sleeve gate, back pressure gate, getter pipe, fuel-displaced ball-and-seat and getter ball-and-seat; It is characterized in that on the flow line of producing between gate and the back pressure gate, being provided with a fuel-displaced ball-and-seat that prevents that oil gas flows backwards in the gathering line; Be provided with one on the tube connector between the ball-and-seat that oil gas flows backwards in producing gate and preventing gathering line and export the getter pipeline that is connected, on the getter pipeline, be provided with one and prevent to produce crude oil that gate the comes out getter ball-and-seat in the sleeve pipe that flows backwards with sleeve gate.

The operating principle of the utility model:

Because pump efficiency is low, the oil pipe internal pressure is the rule of reduction suddenly when utilization prevented the ball-and-seat that the interior oil gas of gathering line flows backwards and utilizes swabs descending, and sleeve gas utilizes the getter pipe to receive and receives gas in the gathering line when utilizing piston stroking upward again in the oil pipe.

The utlity model has following advantage:

1, simple in structure, the on-line automatic recovery of casing gas of ability;

2, the sleeve pipe gas that reclaims gets into gathering line with extraction oil, can reduce the gathering line hydraulic loss, reduces back pressure, reduces the oil pumper load, saves energy;

But 3 sleeve pressure drop to the pressure far below wellhead back pressure, can make producing fluid level very high, have improved the coefficient of fullness and the pump efficiency of oil well pump, have prevented that the oil well pump sky from taking out, the gas lock phenomenon takes place, and have guaranteed the ordinary production of the pumpingh well of high oil-gas ratio.

Description of drawings

Accompanying drawing 1 is the mounting structure sketch map of the utility model;

1-production tree 2-produces the fuel-displaced ball-and-seat 4-of gate 3-getter ball-and-seat 5-back pressure gate 6-getter pipe 7-sleeve gate 8-gathering line among the figure.

The specific embodiment

Be further the openly technical scheme of the utility model, elaborate through embodiment below in conjunction with Figure of description 1:

The utility model comprises production tree 1, produces gate 2, sleeve gate 7, back pressure gate 5, getter pipe 6, fuel-displaced ball-and-seat 3 and getter ball-and-seat 4; It is characterized in that on the flow line of producing between gate and the back pressure gate, being provided with a fuel-displaced ball-and-seat 3 that prevents that oil gas flows backwards in the gathering line; Be provided with one on the tube connector between the ball-and-seat that oil gas flows backwards in producing gate and preventing gathering line and export the getter pipeline 6 that is connected, on the getter pipeline, be provided with one and prevent to produce crude oil that gate the comes out getter ball-and-seat 4 in the sleeve pipe that flows backwards with sleeve gate.

In the pumpingh well actual production, generally all between the 40%-70%, the pump efficiency of the pumpingh well of high oil-gas ratio is just lower for the pump efficiency of oil well pump; If produce the gate outlet ball-and-seat is not installed, the oil of gathering line turns back to oil pipe and replenishes this deficit, if the oil of gathering line just returns not oil return pipe under the effect of fuel-displaced ball-and-seat 3; When descent of piston, just form low-pressure area in the oil pipe, at this moment the gas in the sleeve pipe gets into oil pipe through sleeve gate 7 getter pipes 6 and getter ball-and-seat 4 through producing gate 2; When piston stroking upward, be recovered to oil collecting pipe to gas with oil again, through on-line automatic recovery of casing gas, it is very low that ability sleeve pressure falls; It is very high that producing fluid level is carried; Guarantee the ordinary production of the pumpingh well of high oil-gas ratio, prevented to find time, the generation of gas lock phenomenon, improved pump efficiency.

Claims

1. oil well casing automatic deflation automatic recycling device; Comprise production tree, produce gate, sleeve gate, back pressure gate, getter pipe, fuel-displaced ball-and-seat and getter ball-and-seat; It is characterized in that on the flow line of producing between gate and the back pressure gate, being provided with a fuel-displaced ball-and-seat that prevents that oil gas flows backwards in the gathering line; Be provided with one on the tube connector between the ball-and-seat that oil gas flows backwards in producing gate and preventing gathering line and export the getter pipeline that is connected, on the getter pipeline, be provided with one and prevent to produce crude oil that gate the comes out getter ball-and-seat in the sleeve pipe that flows backwards with sleeve gate.