CN2342133Y

CN2342133Y - Oil pump for exhausting liquid from oil casing annulus cavity

Info

Publication number: CN2342133Y
Application number: CN 98220118
Authority: CN
Inventors: 黄翔; 刘国庆; 王家明; 张洪山
Original assignee: Shengli Petroleum Administration Hekou Oil Extraction Plant
Current assignee: Sinopec Shengli Oilfield Co Hekou Oil Extraction Plant
Priority date: 1998-01-19
Filing date: 1998-01-19
Publication date: 1999-10-06
Anticipated expiration: 2008-01-19

Abstract

The utility model relates to an oil pump for exhausting liquid from the annular cavity of an oil casing, composed of an oil tube check valve, a plunger, a pump barrel, a suction and delivery valve assembly and a packer pup joint. The oil tube check valve is arranged at the upper part of the pump barrel, and the plunger which is arranged inside the pump barrel can be moved vertically; the suction and delivery valve assembly is arranged at the lower end of the pump barrel, and the packer pup joint is arranged at the lower end of the suction and delivery valve assembly; the components are integrally connected by threads. The utility model has the advantage that oil fluid is sucked and delivered from the annular cavity of an oil casing but no longer from the inner cavity of the oil tube, so that the resistance of the oil fluid, particularly thick oil, to the vertical movements of a sucker rod can be reduced, and the accidents of sand clamping and paraffin clamping can be prevented for sanding wells and paraffin wells; the utility model also has the advantages of electric energy saving, load balance, and increase in yield for crude oil.

Description

Oil well pump from the discharge opeing of tubing and casing ring cavity

The utility model relates to the pump that is specifically designed to from the oil well lifting fluid, particularly is a kind of oil well pump from the discharge opeing of tubing and casing ring cavity.

The existing tubing pump structural feature in oil field is that the discharge opeing valve is contained in the piston, is flow in the oil pipe more than the piston by the oil-well strata liquid the taken out runner by the piston center, upwards discharges from well head along the toroidal cavity between oil pipe and the sucker rod again.This tubing pump is if use in the viscous crude sand output well, Yun Hang sucker rod can be subjected to the bigger surface friction drag of viscous crude up and down, can increase the pumping unit load when sucker rod is up, speed can be slack-off when sucker rod was descending, can not be synchronous with pumping unit " horse head ", influence the work jig frequency and the output of pumping well, and power consumption is more.During the pumping unit stop pumping, the sand in the viscous crude will sink and collect the holddown accident that causes between piston and pump barrel.When being used for waxing in production well, wax card sucker rod accident, rod parting accident or packet can take place can not the deblocking accident etc.These accidents all can make oil well stop production, and influence crude output.Patent documentation by retrieval, a piece of writing surplus the patent documentation of relevant thick oil pump class finds 20 wherein has only 4 pieces to be weak coherence with the utility model, and its patent No. is respectively 92211960.0,91211954.3,93242225.X, 91210216.0.Its structure characteristic is all inequality with the utility model, and all from oil pipe inner chamber pump drainage fluid.

In view of the above-mentioned shortcoming and defect part of prior art, the purpose of this utility model just is to provide a kind of structure unusual and can be from the oil well pump of tubing and casing ring cavity discharge opeing.Being used for thick oil well, to overcome the sucker rod uplink load big, and downstream rate is slow, and pumping unit balancing the load situation is poor, and power consumption is big, and oilwell produced fluid amount is low, the high shortcoming of production accident rate.And be applicable to sand well and serious waxing in production well.

Above-mentioned purpose is realized by following technical proposals:

This oil well pump is made up of oil pipe one-way valve, plunger, pump barrel, suction metering valve assembly and packet pipe nipple.The oil pipe one-way valve is contained in the pump barrel upper end.Plunger also can move up and down in pump barrel inside.The suction metering valve assembly is contained in the pump barrel lower end.The packet pipe nipple is contained in suction metering valve assembly lower end.Oil pipe one-way valve, pump barrel, suction metering valve assembly, packet pipe nipple all adopt to be threaded each other and become one.

Suction metering valve assembly in the above-mentioned oil well pump is made up of valve body, feed liquor valve, discharge opeing valve, valve seat and spring.The shaft orientation liquid feeding passage is arranged in the tubular valve body, and feed liquor valve and valve seat thereof and spring are installed in the feed pathway.Apocenosis passage in the valve body is passed through mutually with raidal drainage hole, bottom by upper axial blind hole passage and constitutes.Discharge opeing valve and valve seat thereof and spring are installed in the axial blind hole passage.

Oil pipe one-way valve in the above-mentioned oil well pump is a round tube shape, its underpart 4～6 radially liquid outlet openings that are uniformly distributed along the circumference.

Plunger in the above-mentioned oil well pump is solid body or has axial blind hole.

According to the oil well pump that technique scheme is made, structure is very simple, installs and uses easily, can change from traditional oil production technology of oil pipe inner chamber pump drainage fluid, and realize from the new process of tubing and casing ring cavity discharge fluid.Can reduce the surface friction drag of fluid thus, improve pumping unit stress alternation state of equilibrium, further reduce power consumption, improve oil pumping work jig frequency and oil well output the upper and lower operation of sucker rod.Sand card plunger accident can be prevented for sand well, wax card sucker rod accident can be prevented for waxing in production well.Can also prevent or substantially minimize rod parting accident, packet can not the deblocking accident etc.Owing to reduced the back pressure of thick oil well head of liquid, can recover the production of low production fluid thick oil well to oil reservoir.

Accompanying drawing is that integral body of the present utility model is analysed and observe principle schematic.

In conjunction with the accompanying drawings embodiment of the present utility model is described below:

Among the figure, the 1st, the oil pipe one-way valve, the 2nd, sucker rod, the 3rd, pump barrel, the 4th, plunger, the 5th, suction metering valve assembly valve body, the 6th, the packet pipe nipple, 7 and 11 is springs, the 8th, feed liquor valve, the 9th, valve seat, the 10th, discharge opeing valve.A is an active chamber, and B is an oil pipe one-way valve liquid outlet opening, and C is a suction net assembly inlet opening, and D is a liquid outlet opening.

As seen from the figure, oil pipe one-way valve 1, pump barrel 3, suction metering valve valve body 5 and packet pipe nipple 6, be connected to each other with screw thread successively and become one from top to bottom.Plunger 4 is positioned at the inner chamber of pump barrel 3, and drives operation up and down by sucker rod 2.The feed liquor valve 8 of bottom suction metering valve assembly, discharge opeing valve 10 and spring 7,11 are contained in respectively in the advancing of valve body 5, the apocenosis passage.This oil well pump is installed between pumping well inner oil tube and the packet.

Its working principle is: when sucker rod 2 drives plunger 4 when up, form low pressure area in the active chamber A of pump barrel 3, discharge opeing valve 10 is closed, and feed liquor valve 8 is opened, and stratum fluid enters pump barrel 3 through packet pipe nipple 6 and C hole active chamber A finishes the feed liquor process.When plunger 4 was descending, feed liquor valve 3 was closed, and formed the zone of high pressure in the A chamber, and discharge opeing valve 10 is opened, and the fluid in the pump barrel 3 are drained into toroidal cavity between oil, the sleeve pipe from the D hole of suction metering valve bottom, finished the discharge opeing process.In order to make reducing thick oil viscosity, to oil pipe, add the fluid thermal medium from well head.The fluid thermal medium enters oil, sleeve pipe ring cavity through the B hole of oil pipe one-way valve 1, to the fluid heating and viscosity reducing.Then, oil, the fluid in the sleeve pipe ring cavity is discharged from well head, finishes oil pumping process.

Claims

1. oil well pump from the discharge opeing of tubing and casing ring cavity, form by oil pipe one-way valve, plunger, pump barrel, suction metering valve assembly and packet pipe nipple, it is characterized in that the oil pipe one-way valve is contained in the pump barrel upper end, plunger also can move up and down in pump barrel inside, the suction metering valve assembly is contained in the pump barrel lower end, the packet pipe nipple is contained in suction metering valve assembly lower end, and oil pipe one-way valve, pump barrel, suction metering valve assembly, packet pipe nipple all adopt to be threaded each other and become one.

2. the oil well pump from the discharge opeing of tubing and casing ring cavity according to claim 1, it is characterized in that the suction metering valve assembly is made up of valve body, feed liquor valve, discharge opeing valve, valve seat and spring, the shaft orientation liquid feeding passage is arranged in the columniform valve body, feed liquor valve and valve seat thereof and spring are installed in the feed pathway, apocenosis passage in the valve body is passed through mutually with bottom raidal drainage passage by upper axial blind hole passage and forms, and discharge opeing valve and valve seat thereof and spring are installed in the axial blind hole passage.

3. the oil well pump from the discharge opeing of tubing and casing ring cavity according to claim 1 is characterized in that the oil pipe one-way valve is a round tube shape, its underpart 4～6 radially liquid outlet openings that are uniformly distributed along the circumference.

4. the oil well pump from the discharge opeing of tubing and casing ring cavity according to claim 1 is characterized in that plunger is solid body or tool axial blind hole.