CN2353935Y

CN2353935Y - Multifunction oil pump

Info

Publication number: CN2353935Y
Application number: CN 98239401
Authority: CN
Inventors: 王明军; 李福山
Original assignee: Liaohe Petroleum Exploration Bureau Ciyutuo Oil Extraction Factory
Current assignee: Liaohe Petroleum Exploration Bureau Ciyutuo Oil Extraction Factory
Priority date: 1998-11-17
Filing date: 1998-11-17
Publication date: 1999-12-15
Anticipated expiration: 2008-11-17

Abstract

The utility model discloses a multifunction oil pump used for the test of workover. The utility model is characterized in that the lower end of a connector of a pump barrel is provided with a fixing valve; the outer part of hollow oil pumping rods is provided with an annular valve and a traveling valve; a lower contact of the pump barrel is provided with a ball valve. An oil well can be directly tested, washed and operated through the pump, and the lifting rate of the pump body is increased to improve the production capacity of the oil well. When operated, the utility model can discharge the oil into the oil well, without polluting ground. Because the pump body of the utility model is the improvement of the prior art, the utility model overcomes the defects of the oil pump of the prior art that discharging capacity is low, and cables can not be used for the test of the workover. The utility model has the advantages of low cost, easy fabrication, wide range of application, etc., and therefore, the utility model can be widely used for the refitment of the oil pump in an oil field.

Description

Multifunctional oil-well pump

The utility model relates to an a kind of multifunctional oil-well pump that is used for the oil field, belongs to oil field downhole pump class.

The oil well pump structure of using in the existing technology in oil field is in the oil pumping pump housing bottom standing valve to be set, in piston, be placed with traveling valve, because these two valve bodies are in the central position in the pump housing, thereby can't test oil well, well-flushing, down heat-resistant cable and workover eration later on, and cause crude oil liquid in the pump, can't release and make troubles to oil well, and the multifunctional oil-well pump that the utility model provides not only can adapt to normal oil pumping of oil well and oil well operation, also can improve oil well output, the utility model 1985 by retrieval--modern Chinese patent is not reported.

The purpose of this utility model is the oil well pump that provide in order to overcome above-mentioned shortcoming a kind of multi-functional carries out the well workover test, uses this pump can be directly to oil well injection thermal recovery, well-flushing, dosing and test.

The utility model is achieved in that

It is by oil pipe 3, intermediate connector 4 and the hollow rod 8 that is connected with piston, and piston 10 and lower contact 11 are formed; Only need on the intermediate connector in the pump housing standing valve 7 and valve seat 6 to be installed, the annular valve 5 that matches with valve seat is installed on the hollow rod 8, just can realize the task that the utility model proposes.

During the utility model work, at first the pump housing is immersed in the crude oil of down-hole, the piston that drives hollow rod and lower end when pumping unit is in pump barrel during to-and-fro motion, piston is moved downward, standing valve 7 unlatchings this moment, annular valve 5 cuts out, shaft bottom crude oil is inhaled in the annular cavity between pump barrel and the sucker rod, when piston moved upward, standing valve cut out, and annular valve is opened again, the interior crude oil of annular valve pocket is extracted out from the cavity between oil pipe and the hollow rod, the pump housing moves and so forth, make crude oil constantly be drawn into ground, and the pump housing can also be tested by hollow rod, the well-flushing dosing, underground work such as following heat-resistant cable, only need hollow rod and piston are proposed in pump barrel as needing that also oil well is carried out operation, and then oil pipe and pump barrel are proposed in well, like this because there is not valve part in the pump barrel bottom end, and has only a passage, when carrying oil pipe in well, crude oil can flow in the well automatically in the oil pipe, thereby plays the draining effect.

When to pumping well well-flushing or dosing, can be in hollow rod directly inject flushing fluid and soup, this moment, soup can directly return out in oil pipe, can reduce like this, the consumption of flushing fluid, increased well washing effect, improved well-flushing efficient.When needs during to oil well test, can directly at the bottom of the lower going-into-well, make test job more convenient, in the time of need heating the pumping well tubing string in the hollow rod test instrument, directly be lowered to heat-resistant cable to roofbolt and tubing string heating by hollow rod equally, prevent that the oil well knot is cured and reduce viscosity of crude.

As placing a ball valve 13, (Fig. 2) at pump housing lower end position of the present utility model, a traveling valve 12 is set in hollow rod, this device can use as having double-action function oil well pump again, thereby can increase the lifting rate of oil well pump.

The utility model advantage is: owing to the annular valve that is assembled with standing valve and valve seat on pump housing intermediate connector 4, assembling matches with valve seat on hollow rod, therefore make pump can be directly to pumping well test, operation such as well-flushing, operation, this pump also has automatic draining in addition, function free from environmental pollution, if settle ball valve and traveling valve, can make this pump increase lifting rate again, thereby improve oil well output in pump housing bottom.

Below in conjunction with accompanying drawing the utility model is described further.

Accompanying drawing: 1 the utility model structural representation

2 the utility model are settled the structural representation behind ball valve and the traveling valve.

Embodiment's 1 the utility model is that the neutral position on the pump barrel of former oil well pump is linking a connector 4 with screw thread, its lower end position is assembled with standing valve 7 along disc Zhou Junbu, this valve is at least two, this valve is shaped as annular, below oil pipe 3, be linked with middle coupling piece 4 with screw thread, the medium position of its inwall is linked with a valve seat 6 with screw thread again, on hollow rod 8 outsides, be located in annular valve 5, annular valve 5 is a closed state with valve seat 6, annular valve is opened when hollow rod is mentioned by pumping unit, when hollow rod 8 falls, valve closure; The lower end of hollow rod 8 connects piston 10 by screw thread, constitutes the lower end that constitutes main chamber 2, pump barrel 9 between cavity 1, pump barrel 9 and hollow rod 8 annular spaces between oil pipe 3 and the hollow rod 8 and a lower contact 11 with screwed connection.

Embodiment 2

As when utilizing the utility model to increase discharge capacity, can a ball valve 13 (Fig. 2) be installed in these pump barrel lower contact 11 positions and in hollow rod 8, adorn a traveling valve 12, like this when piston 10 moves upward, ball valve 13 is opened, traveling valve 12 cuts out, the standing valve 7 of pump barrel 9 upper ends cuts out, annular valve 5 is opened, shaft bottom crude oil is drawn in the inner chamber of pump barrel 9 through ball valve 13, simultaneously the crude oil in the cavity between pump barrel 9 and the hollow rod 82 is discharged cavity 1 through annular valve 5, extract out along oil pipe 3, when piston 10 moved downward, ball valve 13 was closed, traveling valve 12 is opened, the standing valve 7 of pump barrel 9 upper ends is opened, and annular valve 5 cuts out, and the crude oil in pump barrel 9 chambers is discharged in well through traveling valve 12 again, and shaft bottom crude oil is among the standing valve on the pump barrel 7 sucks pump barrel 9 inner chambers, to-and-fro motion has like this constituted oil well pump and has moved up and down and all can pump, and has reached pump barrel double-action oil pumping function.

Claims

1, a kind of multifunctional oil-well pump that is used for the oil field; Form by oil pipe 3, hollow rod 8, pump barrel 9 and the piston 10 that is connected the hollow stem lower end; The top neutral position that it is characterized in that pump barrel is by screwed connection a connector 4, along circumferential position a standing valve 7 is housed in connector 4 lower ends, this valve is at least two, below oil pipe 3, a valve seat 6 is arranged in hollow rod 8 outsides with the screw thread binding, be located in annular valve 5, annular valve 5 is a closed state with valve seat 6, hollow rod 8 lower ends are connecting piston 10 with screw thread, constitute a cavity 1 between oil pipe 3 and the hollow rod 8, pump barrel 9 and hollow rod 8 annular spaces constitute a main chamber 2, and pump barrel 9 lower ends a lower contact 11 with screwed connection.

2, oil well pump according to claim 1; It is characterized in that being equipped with in the hollow rod 8 traveling valve 12, a ball valve 3 is arranged in pump barrel 9 lower contacts 11 positions.

3, oil well pump according to claim 1 is characterized in that standing valve 7 is shaped as annular valve.