CN203560087U - Anti-backflow water-addable oil well pump plunger - Google Patents

Abstract

The utility model discloses an anti-backflow water-addable oil well pump plunger. The lower part of an upper dividing connector is in threaded connection with the upper part of the plunger, the lower part of the plunger is in threaded connection with the middle part of a lower dividing connector, the upper part the lower dividing connector is in threaded connection with the lower part of a discharge valve, the upper part of the discharge valve is connected with the lower part of an insert tube, the upper part of the insert tube is inserted into the upper dividing connector, a water-adding inflow passageway and a produced liquid outflow passageway are arranged in the upper dividing connector, a water-adding outflow passageway and a produced liquid inflow passageway are arranged in the lower dividing connector, an annular passageway is arranged between the plunger and the insert tube, a sealing ring is mounted at the upper end of the insert tube, where the insert tube is inserted to the upper dividing connector, the lower part of the lower dividing connector is connected with the upper part of a connector; a spring axle, a spring, a valve ball and a valve seat are put into the valve body from bottom to top, the spring axle is sleeved with the spring, the lower part of the connector is connected with the upper part of the valve body, the valve seat is pressed by the connector, a communication groove is formed in the base plate of the spring axle, the water-adding outflow passageway is communicated with the valve seat, the liquid flow is a one-way flow, and the plunger can prevent water-adding passageways from being blocked when no water is added.

Description

Anti-back flow can watering oil-well pump plunger

Technical field

The utility model is the down-hole pumping unit that petroleum production is used, and is that a kind of anti-back flow can watering oil-well pump plunger.

Prior art

In thick oil well is produced, some employing hollow rod water-doped viscosity reduction oil pumping.Hollow rod water-doped principle be by hot water or steam from well head enter hollow rod through oil pump plunger piston to downstream to pump with crude oil Hybrid Heating under pump (not mixing with crude oil on pump), reach the object of viscosity reduction, oil well can normally be produced.But existingly through plunger, hot water is mixed to the oil well pump under pump and will be drained into from pump barrel bottom pump in oil pipe, as Chinese patent 200920031493.X < < mixes streamer water viscosity-falling unit > >, it is exactly this structure, because it is to start oil extraction by pump barrel bottom, and the natural gas of separating in oil is in pump barrel top, cause natural gas body to arrange not out, after assembling too much, gently reduce pump efficiency, heavy cause gas lock, pump can not be pumped, cause oil well to stop production.For this reason, technician has developed can watering oil-well pump plunger, as Chinese patent 201010280505.x < < can watering oil-well pump plunger > >, do not change the oil extraction mode of oil well pump, can by hot water or steam through oil pump plunger piston mix downwards under pump to pump under heating crude oil.But when raw time, the oil in oil pipe easily flows back in hollow stem from the linked hole of hollow stem bottom, enter after coagulation or wax deposition in hollow stem, stop up hollow stem, cause and can not again hot water or steam be incorporated under oil pump plunger piston.

Summary of the invention

The purpose of this utility model is to provide a kind of anti-back flow can watering oil-well pump plunger, can be raw time, and the oil in oil pipe can not flow backwards and make the return trip empty in core bar, prevents water mixing channel jam.

The purpose of this utility model is achieved in that and comprises tap, seal ring, plunger, interpolation pipe, expulsion valve, lower tap, joint, valve body, valve seat, valve ball, spring, spring shaft, hollow stem screw thread is arranged at the top of upper tap, upper tap lower thread is connected with plunger upper part, plunger bottom is threaded with lower tap middle part, lower tap top screw thread is connected with expulsion valve bottom, expulsion valve top is connected with interpolation pipe bottom, and insert in upper tap on interpolation pipe top, has water mixing to flow into runner in upper tap, Produced Liquid flows out runner, has water mixing to flow out runner in lower tap, Produced Liquid flows into runner, between plunger and interpolation pipe, has ring runner, and water mixing flows into runner, ring runner, water mixing is flowed out runner and is communicated, Produced Liquid flows out runner and communicates with expulsion valve top, and expulsion valve bottom flows into runner with Produced Liquid and communicates, and interpolation pipe upper end is inserted upper tap place seal ring is installed, the bottom of lower tap is connected with the top of joint, puts into from bottom to up spring shaft in valve body, spring, valve ball, valve seat, the lower shoulder place location of spring shaft in valve body, the upper shoulder place location of valve seat in valve body, spring housing is contained on spring shaft, spring supporting valve ball, and valve ball falls seat in the lower end mouth of valve seat, the bottom of joint is connected with the top of valve body, the upper-end surface of valve seat is pushed down in the lower end surface of joint, the chassis Shang You UNICOM groove of spring shaft, and water mixing is flowed out runner and is communicated with valve seat.

The beneficial effects of the utility model: spring supporting valve ball, valve ball falls seat in the lower end mouth of valve seat, makes the liquid stream can only one-way flow, can be raw time, the oil in oil pipe can not flow backwards and make the return trip empty in core bar, can prevent water mixing channel jam.

Accompanying drawing explanation

Accompanying drawing 1 is the utility model embodiment's structural drawing.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described.As shown in the figure, embodiment of the present utility model comprises tap 1, seal ring 4, plunger 5, interpolation pipe 6, expulsion valve 8, lower tap 11, joint 12, valve body 13, valve seat 14, valve ball 15, spring 16, spring shaft 17, hollow stem screw thread is arranged at the top of upper tap 1, hollow stem screw thread is arranged at the bottom of lower tap 11, upper tap 1 lower thread is connected with plunger 5 tops, plunger 5 bottoms are threaded with lower tap 11 middle parts, and lower tap 11 top screw threads are connected with expulsion valve 8 bottoms, and expulsion valve 8 tops are connected with interpolation pipe 6 bottoms, insert in upper tap 1 on interpolation pipe 6 tops, and 1 li of upper tap has water mixing to flow into runner 2, Produced Liquid flows out runner 3, and 11 li of lower taps have water mixing to flow out runner 9, Produced Liquid flows into runner 10, between plunger 5 and interpolation pipe 6, has ring runner 7, and water mixing flows into runner 2, ring runner 7, water mixing is flowed out runner 9 and is communicated, Produced Liquid flows out runner 3 and communicates with expulsion valve 8 tops, expulsion valve 8 bottoms flow into runner 10 with Produced Liquid and communicate, interpolation pipe 6 upper ends are inserted upper tap 1 place seal ring 4 are installed, the bottom of lower tap 11 is connected with the top of joint 12, puts into from bottom to up spring shaft 17 in valve body 13, spring 16, valve ball 15, valve seat 14, the lower shoulder place location of spring shaft 17 in valve body 13, the upper shoulder place location of valve seat 14 in valve body 13, spring 16 is sleeved on spring shaft 17, and spring 16 supports valve ball 15, valve ball 15 falls seat in the lower end mouth of valve seat 14, the bottom of joint 12 is connected with the top of valve body 13, and the upper-end surface of valve seat 14 is pushed down in the lower end surface of joint 12, the chassis Shang You UNICOM groove 18 of spring shaft 17, be used for flowing through and mix water, water mixing is flowed out runner 9 and is communicated with valve seat 14.

During work, upper tap 1 top is connected with hollow rod, lower tap 11 bottoms are connected with hollow rod, plunger 5 is in oil pumping barrel, mix hot water or steam hollow rod, water mixing on pump and flow into runner 2, ring runner 7, water mixing outflow runner 9, joint 12, valve seat 14, back down valve ball 15 hollow rod under pump again and flow under pump and to heating crude oil, in well, crude oil is plucked out of and flow on pump through Produced Liquid inflow runner 10, expulsion valve 8, interpolation pipe 6, Produced Liquid outflow runner 3.

While stopping water mixing, valve seat 14 internal bore pressures decline, and spring 16 supports valve ball 15, and valve ball 15 falls seat in the lower end mouth of valve seat 14, and crude oil can not flow backwards, and can prevent water mixing channel jam.

Claims (1)

1. an anti-back flow can watering oil-well pump plunger, comprise tap (1), seal ring (4), plunger (5), interpolation pipe (6), expulsion valve (8), lower tap (11), joint (12), valve body (13), valve seat (14), valve ball (15), spring (16), spring shaft (17), hollow stem screw thread is arranged at the top of upper tap (1), upper tap (1) lower thread is connected with plunger (5) top, plunger (5) bottom is threaded with lower tap (11) middle part, lower tap (11) top screw thread is connected with expulsion valve (8) bottom, expulsion valve (8) top is connected with interpolation pipe (6) bottom, insert in upper tap (1) on interpolation pipe (6) top, upper tap (1) is inner has water mixing to flow into runner (2), Produced Liquid flows out runner (3), lower tap (11) is inner has water mixing to flow out runner (9), Produced Liquid flows into runner (10), between plunger (5) and interpolation pipe (6), there is ring runner (7), water mixing flows into runner (2), ring runner (7), water mixing is flowed out runner (9) and is communicated, Produced Liquid flows out runner (3) and communicates with expulsion valve (8) top, expulsion valve (8) bottom flows into runner (10) with Produced Liquid and communicates, interpolation pipe (6) upper end is inserted upper tap (1) and is located to install seal ring (4), it is characterized in that: the bottom of lower tap (11) is connected with the top of joint (12), in valve body (13), put into from bottom to up spring shaft (17), spring (16), valve ball (15), valve seat (14), the lower shoulder place location of spring shaft (17) in valve body (13), the upper shoulder place location of valve seat (14) in valve body (13), spring (16) is sleeved on spring shaft (17), spring (16) supports valve ball (15), valve ball (15) falls seat in the lower end mouth of valve seat (14), the bottom of joint (12) is connected with the top of valve body (13), the upper-end surface of valve seat (14) is pushed down in the lower end surface of joint (12), the chassis Shang You UNICOM groove (18) of spring shaft (17), water mixing is flowed out runner (9) and is communicated with valve seat (14).

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