CN2427649Y - Double chennel and double function type deep well pump - Google Patents

Abstract

The utility model relates to a double-channel and double-function type deep well pump for oil pump wells of oil fields. When the oil pump does stroke up and down, the utility model has pumping function, and thus the efficiency of the utility model is improved. The general pump is provided with an upper valve ball 26 and a lower valve ball 31. A hollow oil pumping rod 3 which is connected with a plunger 24, a joint 1 with a wall opening 2, an oil pumping rod column and an oil pipe are connected with a circular cavity in series, and then an oil outlet channel is formed. As the walls of joints (14, 16) are connected with the upper oil pipe in series to form a circular oil outlet valve assembly and an oil inlet valve assembly outside the hollow oil pumping rod 3, and the circular cavity 20 is formed outside the hollow oil pumping rod, when the plunger 24 does movement up and down, the volume of the circular cavity 20 is changed, and the communicated oil outlet valve assembly and the oil inlet valve assembly are driven to generate the alternative on-off function.

Description

Double flow channel double-action deep-well pump

The utility model relates to the oilfield pumping well deep-well pump, belongs to double flow channel double-action deep-well pump.

During the oil field enters, the back development period, formation pressure descends, and often adopts the deep-well pump oil pumping.It is that power equipment, production tree and production derrick are installed on well head ground, by oil pipe string deep-well pump is sent into the down-hole, rod string is reciprocating under the power equipment effect of ground, and plunger moves up and down underground crude oil pumping to ground in the deep-well pump of drive down-hole.Single current is arranged to into and out of oily valve in the present conventional deep-well oil pump, when rod string was up, bottom oil-feed valve was opened in the pump, and underground crude oil enters the pump barrel cavity of resorption from the lower end mouth that communicates with the stratum; When rod string was descending, fuel-displaced valve was opened in the pump, and crude oil enters the oil pipe pumping to ground through the pump barrel epicoele.This conventional deep-well oil pump in rod string is made a stroke of upper and lower motion, alternately closes, opens into and out of oily valve in the underwell pump, only when upstroke crude oil being carried to ground, do not had swabbing action during down stroke, is to make idle work, pump efficiency is low, wastes energy.

The purpose of this utility model is to avoid the deficiency that exists in the above-mentioned present technology, and a kind of double flow channel double-action deep-well pump that improves pump efficiency is provided.

The purpose of this utility model can reach by the following technical programs: the bottom that produces oil pipe string in the pit shaft connects conventional deep-well pump, and the upper and lower valve of spacing is housed in the pump, and rod string drives that plunger pumps in the pump barrel in the pit shaft.The utility model is on the basis of above-mentioned conventional deep-well pump, and the upper end of plunger is threaded than long hollow rod, the delivery connection that the wall mouth is arranged and rod string in regular turn by joint in pump, and wherein delivery connection stretches into the top oil pipe string.With the pump barrel joint be threaded in regular turn external into and out of the upper and lower joint of oil, short circuit, oil connection again with on oil pipe string is connected.Connecting the intercommunicating pore that forms some axial coaxial inner conductors in the barrel of laggard, fuel-displaced upper and lower joint, wherein the lower end of through hole is led to the annular chamber oil duct that forms between external, middle part and pump barrel joint and the hollow rod and is communicated with in each oil-feed lower contact; Through hole is communicated with the short circuit inner chamber in each fuel-displaced upper connection.The lower end of each axial hole is bumped into lining in above-mentioned oil-feed lower contact, and sitting in the upper end-hole of each lining again has valve ball to constitute unidirectional oil-feed valve; Outlet at fuel-displaced each axial hole of upper connection also is bumped into lining, takes valve ball and buckles the ball cover that is threaded, and constitutes unidirectional fuel-displaced valve; On each ball cover sidewall the wall mouth is arranged, and each ball cover stretches into the top short circuit.

In such scheme, can be in the oil-feed lower contact on hollow rod, overlapping upper sleeve gasket between the oil connection and seal ring being housed, wherein stuffing box gland is threaded with lower contact, and the supporting positive cover that is threaded on stuffing box gland.The pump barrel joint link to each other with the oil-feed lower contact end external diameter less, can reduce pump housing external diameter.In the barrel of oil-feed lower contact and fuel-displaced upper connection, can form 9 to 12 axial intercommunicating pores, can form 9 to 12 unidirectional into and out of oily valve.

By above forecast scheme configuration the utility model.It is to form pump by hollow rod to be communicated with oil discharge passage with the top oil pipe on the plunger of former deep-well pump, on pump barrel and between the oil connection, form in the barrel again, the upper and lower valve of oil-feed, valve and combination of zones under the oil-feed, the fuel-displaced valve of going up is communicated with top oil pipe inner chamber, constitute other oil pumping system, form double flow channel double-action deep-well pump, can realize this purpose.

The utility model is compared with above-mentioned present technology can have following advantage: by above scheme as can be known, the utility model is to be connected with hollow rod between the plunger of former deep-well pump and sucker rod, and wherein hollow rod is the also former deep-well pump oil discharge passage that is communicated with the top oil pipe of double as of transferring power bar.Because in barrel outside the hollow rod, looping makes two groups of valves also form the open and close effect in the upper and lower movement process of plunger into and out of oily valve group again, constitutes double flow channel double-action deep-well pump, use motive force can improve pump efficiency 60%, improve oil output per well.

Fig. 1, the 2nd, the utility model merogenesis partly cuts open structural drawing, and wherein Fig. 2 is former deep-well pump structural drawing, and Fig. 2 is that two groups of annulars forming outside hollow rod 3 are into and out of oily valve figure.

To be further described the utility model below in conjunction with accompanying drawing:

By Fig. 1, shown in 2, wherein Fig. 2 is original conventional deep-well pump structural drawing, and Fig. 2 is that two groups of annulars forming again outside hollow rod 3 are into and out of oily valve figure.The oil pipe string that is threaded in regular turn with ground well head production tree is arranged in the pit shaft of oil field, have in the oil pipe string by the drive of ground power equipment and make upper and lower reciprocating rod string; The oil pipe string bottom connects deep-well pump as shown in Figure 2, and what spacing was housed in the pump fuel-displacedly goes up valve under valve, the oil-feed, and rod string drives 22 li plungers 24 of pump barrel and pumps.The utility model as shown in Figure 1, it be plunger 24 in pump the upper end by joint 23 be threaded in regular turn long hollow rod 3, the delivery connection 1 and the rod string of wall mouth 2 are arranged, its middle joint 1 stretches into oil pipe string, and its upper wall mouth 2 communicates with ring cavity in the oil pipe string.Be connected with the top oil pipe string again be threaded in regular turn external oil-feed lower contact 16, fuel-displaced upper connection 14, short circuit 6, oil connection 4 of pump barrel joint 21.In the barrel of fuel inlet fitting after the connection 16 and delivery connection 14, form the intercommunicating pore (19 of some axial coaxial inner conductors, 13), wherein the lower end of each through hole 19 is led to the annular chamber oil duct 20 that forms between external, middle part and joint 21 and the hollow rod 3 and is communicated with; Each through hole 13 is communicated with short circuit 6 inner chambers, forms the axial oil passage outside the hollow rod 3.Be bumped into lining 18 in the lower end of each through hole 19, sitting in the upper end-hole of each lining 18 again has valve ball 17 to constitute unidirectional oil-feed valve group; Outlet at each port 13 is bumped into lining 11, takes valve ball 10 and buckles the ball cover 9 that is threaded, and constitutes unidirectional fuel-displaced valve group, simultaneously on each ball cover 9 sidewall fuel-displaced wall mouth 12 is arranged, and each ball cover 9 stretches into 7 li of the inner chambers of top short circuit 6.

In technique scheme, be protection hollow rod 3, can load onto seal ring 15 in lower contact 16 on hollow rod 3, overlapping upper sleeve gasket 8 between the oil connection 4; Wherein stuffing box gland 8 is threaded with lower contact 16, and the supporting positive cover 5 that is threaded in the upper end of stuffing box gland 8.By shown in Figure 1, be close for making two groups of external diameters after the assembling into and out of its external diameter of oily valve and top oil connection 4, link to each other with lower contact 6 external diameter of end of pump barrel joint 21 is less.According to oil well output, in the barrel of oil-feed lower contact 16 and fuel-displaced upper connection, can form uniform 9 to 12 axial intercommunicating pores (19,13), can assemble 9 to 12 into and out of oily valve.Fig. 2 is conventional deep-well pump structural drawing, and plunger 24 is threaded in regular turn with last valve cover 25, valve seat pressure cap 28, and sitting in regular turn on the valve seat pressure cap 28 has valve seat 27, valve ball 26, and wherein valve seat 27 is in the annular groove that embeds on the pressure cap 28; Pump barrel 22 links to each other with following valve cover 30 by box cupling 29, and following valve is identical with last valve, and valve seat pressure cap 33, valve seat 32 and valve ball 31 are also arranged.

The utility model that constitutes by above technological scheme, wherein pump barrel 22 usefulness pump barrel joints 21 with into and out of the upper and lower joint of oil (16,14), short circuit 6, oil connection 4 with on oil pipe string is connected, so that pump barrel 22 does not produce is upper and lower mobile.And 22 li plungers 24 of pump barrel are done upper and lower to-and-fro motion with rod string in hollow rod and the top oil pipe string under the ground power equipment drives, and the last valve of 25 li on valve cover is done upper and lower to-and-fro motion in the drive.When last valve down moved, fluid entered from delivery connection 1 upper wall mouth 2 by the hollow rod inner chamber that ring cavity returns out from well head in the oil pipe string in the valve chamber; When last valve up moved, cavity volume enlarged under this valve, and its internal pressure descends, and following valve ball 31 is backed down by strata pressure fluid, and fluid enters down inner chamber on the valve, finishes the pumping process; When last valve up moves, the volume of the ring cavity 20 between hollow rod 3 and the pump barrel joint 21 also dwindles thereupon, its inner fluid enters lower contact 16 and upper connection 14 intercommunicating pores, and the fluid that enters the hole forces valve ball 17 to descend and is seated at the port closing oil-feed valve group of lining 18; Enter the outlet that the fluid in hole 13 forces valve ball 10 to climb away lining 11 and open fuel-displaced valve group, inner chamber ring cavity in the oil pipe string returned out well head on fluid entered from ball cover 9 upper wall mouths 12.When last valve down moved, last valve ball 26 was backed down, valve ball 31 declines are closed down, and the fluid of inner chamber enters inner chamber on the valve between two valves; Meanwhile, the volume of ring cavity 20 then enlarges thereupon, makes pressure decline in the through hole between two valves of upper and lower joint (16,14) lining, and valve ball 17 is backed down by strata pressure fluid, and promptly annular oil-feed valve group is opened; Valve ball 10 descends and closes the outlet of lining 11, and promptly annular fuel-displaced valve group is a closed condition.It more than is the motion analysis that rod string forms each valve in finishing a upper and lower movement process, owing to increased annular into and out of oily valve group, formed double flow channel double-action deep-well pump, in the upper and lower to-and-fro motion process of plunger, swabbing action is arranged all, improve pump efficiency, increased well yield.

Claims (4)

1, a kind of double flow channel double-action deep-well pump that is lowered to the oil-field oil pumper down-hole, the lower end of oil pipe string is connected with conventional deep-well pump in the pit shaft, and the last valve of spacing, following valve are housed in the pump; Rod string drive pump barrel (22) lining plunger (24) pumps in the pit shaft, it is characterized in that:

A. the upper end of plunger (24) by joint (23) be threaded in regular turn long hollow rod (3), the delivery connection (1) and the rod string of wall mouth (2) are arranged, its middle joint (1) stretches into oil pipe string;

B. use pump barrel joint (21) to be threaded external oil-feed lower contact (16), fuel-displaced upper connection (14), short circuit (6), oil connection (4) in regular turn again with on oil pipe string is connected;

C. joint (16 after connection, 14) form the intercommunicating pore (19 of some axial coaxial inner conductors in the barrel, 13), wherein the lower end of each through hole (19) is led to the annular chamber oil duct (20) that forms between external, middle part and joint (21) and the hollow rod (3) and is communicated with; Each through hole (13) is communicated with short circuit 6 inner chambers;

D. be bumped into lining (18) in the lower end of each through hole (19), sitting in the upper end-hole of each lining (18) again has valve ball (17) to constitute unidirectional oil-feed valve group; Outlet at each through hole (13) is bumped into lining (11), takes valve ball (10) and buckles the ball cover (9) that is threaded and constitutes unidirectional fuel-displaced valve group, simultaneously on each ball cover (9) sidewall, fuel-displaced wall mouth (12) is arranged, and each ball cover (9) stretches into top short circuit (6).

2, deep-well pump according to claim 1, it is characterized in that: can be in lower contact (16) to going up cover upper sleeve gasket (8), load onto seal ring (15) in hollow rod (3) between the oil connection (4), wherein stuffing box gland (8) is threaded with lower contact (16), and the supporting positive cover (5) that is threaded in the upper end of stuffing box gland (8).

3, deep-well pump according to claim 1 is characterized in that: pump barrel joint (21) link to each other with lower contact (16) end external diameter less.

4, deep-well pump according to claim 1 is characterized in that: in the barrel of oil-feed lower contact (16) and fuel-displaced upper connection (14), can form 9 to 12 axial intercommunicating pores (19,13), can form 9 to 12 unidirectional into and out of oily valve.

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