CN208950828U - A kind of oil well pump - Google Patents

Abstract

The utility model provides a kind of oil well pump, it is less than the lower plunger of upper plug including pump barrel, delivery valve, inlet valve, upper plug and diameter, the inlet valve includes movable set in lower prop spool beyond the Great Wall and the valve seat being arranged on pump barrel, and the spool can move back and forth under the action of lower plunger friction with lower plunger.When inlet valve folding, under the double action of crude oil pressure and the frictional force of plunger, the speed that inlet valve opens and closes is rapider, can pass through more oil masses in limited ram travel.

Description

A kind of oil well pump

Technical field

The utility model relates to a kind of oil exploitation tools, and in particular to a kind of oil well pump.

Background technique

Viscous crude resource is extremely abundant in the world, in China it has been found that large number of heavy crude reservoir.But due to viscous crude Characteristic with special high viscosity and high-solidification point all encounters some technical problems in terms of development and application, especially thick The exploitation of oil is global technical problem.

Mainly there are two disadvantages for current suction pump common in actual production, first is that oil inlet runner is small, crude oil is from plunger It is internal excessively oily, and bottom plunger is path plunger, in the case where requiring certain wall thickness proof strength, hole size is limited, Cause that oil inlet runner is small and grows；It is more then that oil inlet resistance is big, since heavy oil wells Central Plains oil viscosity is bigger than normal, when crude oil is under It when portion's path plunger inner hole passes through, is grown because lower part path plunger oil inlet runner is small, oil inlet resistance will increase, and hinder under plunger Row, causes polished rod to lag, and even will cause plunger when serious can not downlink.

If application publication number is CN105697344A, data of publication of application is that the Chinese invention patent of 2016.06.22 is just announced A kind of major diameter oil inlet valve type hydraulic feedback suction pump, by the inlet valve of traditional suction pump is displaced downwardly to lower plunger hereinafter, oil inlet The diameter of valve is no longer limited by lower piston structure size, and diameter becomes larger, and increases oil inlet quantity.But the inlet valve relies on merely Fluid pressure is driven, and exploiting, this viscosity is big, and when the big viscous crude of oil inlet resistance, the speed of oil inlet threshold switch is slower, according to Can so there is a problem of that oil inlet is slow.And lower plunger is solid construction, the weight of plunger is increased, to the pumping on assembly for plunger Beam hanger brings bigger load.

Utility model content

The purpose of this utility model is to provide a kind of oil well pumps, are opened and closed with solving inlet valve during thickened oil recovery It is blunt, the slow problem of oil inlet.

To achieve the above object, the technical solution of the oil well pump of the utility model is: the oil well pump of the utility model includes Pump barrel, delivery valve, inlet valve, upper plug and diameter are less than the lower plunger of upper plug, and the inlet valve includes movable set under Spool on plunger and the valve seat being arranged on pump barrel, the spool can be with lower piston reciprocation under the action of lower plunger friction Movement.

The beneficial effects of the utility model are inlet valve being sleeved on lower prop beyond the Great Wall, and at work, oil inlet valve core exists Under the dual drive of crude oil pressure and the frictional force of lower plunger, the speed of opening and closing faster, can be in limited plunger row Pass through more oil masses in journey.

Pump barrel includes the upper pump barrel and lower pump barrel of releasable connection, and valve seat is arranged on lower pump barrel.Pump barrel is divided into upper and lower two It is more convenient for transporting and install in part.

Lower plunger is hollow closed structure.Since the oil passage of the utility model no longer enters from lower plunger inside stream, because The head of lower plunger is made into closed hollow structure by this, effectively reduces the weight of lower plunger, so that driving plunger motion The load that sucker rod is born is also smaller.

The sleeve being flexibly connected with lower plunger is also extended at spool both ends, is additionally provided with elasticity between lower plunger and spool Circle.The sleeve connected with lower plunger that spool both ends are extended is the contact area in order to increase spool and lower plunger, to increase Frictional force between big valve core and lower plunger, so that lower plunger drives valve core movement.It is additionally provided between lower plunger and spool Elastic ring is in order to while guaranteeing frictional force, moreover it is possible to reduce lower abrasion between plunger and spool, prolong the service life, also It can play the role of facilitating installation and sealing.

Locating part is additionally provided with backwards to valve seat side in inlet valve.In up stroke, prevent inlet valve from following lower plunger together Movement is deviate from from fuel feed hole；In down stroke, prevent causes closing speed excessively slow since inlet valve raising height is excessively high The problem of.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the oil well pump specific embodiment one of the utility model；

Fig. 2 is the structure diagram of the oil well pump of the utility model.

In figure: 1, upper pump barrel；2, upper plug；3, delivery valve；4, oil inlet valve core；5, lower pump barrel；6, lower plunger；7, empty Chamber；8, annular chamber；9, locating part；10, oil inlet valve base.

Specific embodiment

The embodiments of the present invention is described further with reference to the accompanying drawing.

The specific embodiment one of the oil well pump of the utility model, as shown in Figure 1, upper pump barrel 1 and lower pump barrel 5,2 and of upper plug Lower 6 releasable connection of plunger, upper plug 2 and lower plunger 6 collectively constitute assembly for plunger, drive assembly for plunger in pump barrel by sucker rod It moves back and forth.Upper plug 2 and the suit connection of upper pump barrel 1, upper pump barrel 1 is divide into upper part and lower part by upper plug 2, and upper prop 2 outer walls and the sealing of 1 inner wall of upper pump barrel are filled in, crude oil is avoided to flow out from gap.There is cavity 7 in upper plug 2, delivery valve 3 is located at sky In chamber 7, upper 1 top of pump barrel, cavity 7 and upper pump barrel had oil stream road between 1 lower part.

Lower plunger 6 is hollow closed structure.Hollow structure effectively reduces the weight of lower plunger 6, makes to drive plunger total The load born at the sucker rod of movement is also smaller.Because crude oil is from the oil inlet valve core between lower pump barrel 5 and upper pump barrel 1 4 enter annular chamber 8, no longer flow into inside lower plunger 6, therefore the head of lower plunger 6 is made into enclosed construction.

Oil inlet valve core 4 is sleeved on 6 outside of lower plunger, extends and the movable company of lower plunger 6 at 4 both ends of oil inlet valve core The sleeve connect.It is additionally provided with elastic ring between lower plunger 6 and oil inlet valve core 4, is used to while guaranteeing frictional force, moreover it is possible to Lower abrasion between plunger 6 and oil inlet valve core 4 is reduced, prolongs the service life, the work for facilitating installation and sealing can also be played With.

Oil inlet valve base 10 is arranged on lower pump barrel 5, is additionally provided with limit backwards to 10 side of oil inlet valve base in oil inlet valve core 4 Position part 9 prevents inlet valve from lower plunger being followed to move together and deviates from from fuel feed hole in up stroke；In down stroke, prevent The problem for causing closing speed excessively slow since inlet valve raising height is excessively high.

The structure diagram of the oil well pump of the utility model is as shown in Fig. 2, in up stroke, band of the assembly for plunger in sucker rod Dynamic lower uplink, delivery valve 3 are closed, and the crude oil in the cavity 7 of upper plug 2 enters upper 1 top of pump barrel by oil passage and is discharged, 8 volume of annular chamber between upper and lower plunger increases, and forms low pressure chamber, and lower plunger 6 drives 4 uplink of oil inlet valve core, while oil inlet The crude oil that valve core 4 also suffers from lower part upwards pressure.Oil inlet valve core 4 is quickly opened under the collective effect of the two, well Lower crude oil is entered between upper and lower plunger in annular chamber 8 by oil inlet valve core 4.

In down stroke, assembly for plunger downlink under the drive of sucker rod, lower plunger 6 drives 4 downlink of oil inlet valve core, together When oil inlet valve core 4 also suffer from the crude oil pressure in upper, annular chamber 8.Oil inlet valve core 4 is fast under the collective effect of the two Speed is closed, and the volume of the annular chamber 8 between upper and lower plunger reduces, and forms high pressure chest, and the crude oil in annular chamber 8 opens delivery valve 3, Into in the cavity 7 of upper plug 2.

The embodiment two of the oil well pump of the utility model, the difference with embodiment one be, oil inlet valve core backwards into Oil valve valve seat side is not provided with locating part.

The embodiment three of the oil well pump of the utility model, the difference with embodiment one are, in oil inlet valve core and lower prop The contact portion of plug does not have elastic ring.

The example IV of the oil well pump of the utility model, the difference with embodiment one are that oil inlet valve core both ends do not have Extend the sleeve with the lower movable connection of plunger.

The embodiment five of the oil well pump of the utility model, the difference with embodiment one are that lower plunger is solid construction.

Claims (6)

1. a kind of oil well pump is less than the lower plunger of upper plug, feature including pump barrel, delivery valve, inlet valve, upper plug and diameter It is, the inlet valve includes movable set in lower prop spool beyond the Great Wall and the valve seat being arranged on pump barrel, and the spool is under It can be moved back and forth with lower plunger under the action of plunger friction.

2. oil well pump according to claim 1, which is characterized in that the pump barrel includes the upper pump barrel and lower pump of releasable connection Cylinder, valve seat are arranged on lower pump barrel.

3. oil well pump according to claim 1, which is characterized in that lower plunger is hollow closed structure.

4. oil well pump according to claim 1 or 2 or 3, which is characterized in that also extend and lower plunger at the spool both ends The sleeve of flexible connection.

5. oil well pump according to claim 1 or 2 or 3, which is characterized in that be additionally provided with bullet between lower plunger and spool Property circle.

6. oil well pump according to claim 1, which is characterized in that be additionally provided with locating part backwards to valve seat side in inlet valve.