CN207145197U

CN207145197U - A kind of pumpingh well straight-down negative load reducer

Info

Publication number: CN207145197U
Application number: CN201721163788.3U
Authority: CN
Inventors: 宋明远
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-09-08
Filing date: 2017-09-08
Publication date: 2018-03-27
Anticipated expiration: 2027-09-08

Abstract

The utility model discloses a kind of pumpingh well straight-down negative load reducer, including the lower seal cylinder (7) being connected by oil pick-up tube with pump barrel, the drain plunger tube (5) that sucker rod is connected with plunger is provided with lower seal cylinder (7), upper seal bore (3) is provided with the top of drain plunger tube (5), bottom is provided with lightening piston (6), lightening piston (6) is located in lower seal cylinder (7) and lower seal cylinder (7) clearance seal, drain plunger tube (5) is pushed to drive upper seal bore (3) mobile and lightening piston (6) is pressed into lower seal cylinder (7).The utility model realizes sucker rod connection drain plunger tube, upper seal bore, lightening piston, the direct-connected tripping in of oil pump plunger piston, Load Alleviation Function can be formed after in place, fault rate is low, it is high by straight-down negative, connection fastening, tensile strength, can tripping in plunger upper part, suitable for thin oil and heavy oil wells, play off-load and improve pumpingh well system effectiveness, reduce cost for oil production effect.

Description

A kind of pumpingh well straight-down negative load reducer

Technical field

It the utility model is related to petroleum downhole equipment, more particularly to a kind of pumpingh well straight-down negative load reducer.

Background technology

With the exploitation in oil field, after oil well stop-spraying, sucker rod pumping is a main oil production method, and during with exploitation Between extension and recovery percent of reserves increase, liquid level gradually reduces, it is necessary to ap- plication.And present depth is taken out by oil pumper donkey The restriction of head rated load and rod weight, lower-continuous mapping are subject to certain restrictions.Meanwhile lower pursuit of advanced studies is consumed energy into crude oil production Greatly, cost is high, benefit is low.

Load reducer in the market is needed to be segmented tripping in, and upper lower sucker rod must be docked using disjointed device, often gone out The middle disjointed device that now works disengages, and fault rate is high, and in inapplicable heavy oil wells.

Utility model content

The purpose of this utility model, which is to provide, a kind of can realize the direct-connected tripping in of sucker rod, without split tripping in A kind of pumpingh well straight-down negative load reducer.

To achieve the above object, a kind of concrete technical scheme of pumpingh well straight-down negative load reducer of the present utility model is：

A kind of pumpingh well straight-down negative load reducer, including the lower seal cylinder being connected by oil pick-up tube with pump barrel, in lower seal cylinder The drain plunger tube that sucker rod is connected with plunger is provided with, is provided with upper seal bore at the top of drain plunger tube, bottom is set Lightening piston is equipped with, lightening piston is located in lower seal cylinder and lower seal cylinder clearance seal, and it is upper close to push the drive of drain plunger tube Sealed tube is mobile and lightening piston is pressed into lower seal cylinder.

Further, lower seal cylinder includes reducing step, and the internal diameter on reducing step top is more than the internal diameter of bottom, drain plunger Pipe drives upper seal bore to push and is sitting on reducing step, is moved down with limiting upper seal bore.

Further, drain plunger tube is provided at both ends with biography fluid apertures.

Further, spiracle is provided with the side wall of lower seal cylinder, spiracle is located at the bottom of reducing step, for oil Collar Kongxiang connects.

Further, the outer cover of drain plunger tube is provided with retainer ring, and retainer ring is located at the top of upper seal bore, upper seal bore It is pushed down into by retainer ring in lower seal cylinder.

Further, fixed anchor fluke is provided with the internal face of lower seal cylinder, upper seal bore pushes rear lower seal cylinder and passed through admittedly Determine anchor fluke with upper seal bore fastening to be connected.

A kind of the advantages of pumpingh well straight-down negative load reducer of the present utility model, is：

1) solve the problems, such as that pursuit of advanced studies into crude oil production power consumption is big, cost is high, benefit is low, has load shedding, section under pumpingh well Energy, the benefit of synergy, considerably reduce production cost, are readily applicable to thin oil, heavy crude well；

2) pumping unit horsehead polished rod load is alleviated, supporting oil pumping well depth is taken out；

3) reduce rod string to stretch, reduce loss of plunger stroke, improve computer collecting system efficiency, reduce production cost；

4) sucker rod connection drain plunger tube, upper seal bore, lightening piston, the direct-connected tripping in of oil pump plunger piston are realized, Load Alleviation Function can be formed after in place, fault rate is low, and by straight-down negative, connection fastening, tensile strength is high, can be on tripping in plunger Portion, suitable for thin oil and heavy oil wells, play off-load and improve pumpingh well system effectiveness, reduce cost for oil production effect.

Brief description of the drawings

Fig. 1 is the structural representation of pumpingh well straight-down negative load reducer of the present utility model；

Fig. 2 is the profile of pumpingh well straight-down negative load reducer of the present utility model.

Embodiment

In order to be better understood by the purpose of this utility model, structure and function, below in conjunction with the accompanying drawings, to of the present utility model A kind of pumpingh well straight-down negative load reducer does further detailed description.

As depicted in figs. 1 and 2, it is shown as a kind of pumpingh well straight-down negative load reducer of the present utility model, including passes through oil pumping The lower seal cylinder 7 being connected with pump barrel is managed, the drain plunger tube 5 that sucker rod is connected with plunger is provided with lower seal cylinder, leads The top of liquid plunger tube 5 is provided with upper seal bore 3, and bottom is provided with lightening piston 6, lightening piston 6 be located in lower seal cylinder 7 with The clearance seal of lower seal cylinder 7, push drain plunger tube 5 and drive upper seal bore 3 to move and lightening piston 6 is pressed into lower seal cylinder 7 In, drain plunger tube, upper seal bore, lightening piston, the direct-connected tripping in of oil pump plunger piston are connected by sucker rod, in place after just Load Alleviation Function can be formed, fault rate is low, and by straight-down negative, connection fastening, tensile strength is high, can tripping in plunger upper part, be applied to Thin oil and heavy oil wells, play off-load and improve pumpingh well system effectiveness, reduce cost for oil production effect.

Further, lower seal cylinder 7 includes reducing step, and the internal diameter on reducing step top is slightly larger than the internal diameter of bottom, drain Plunger tube 5 drives upper seal bore 3 to push and is sitting on reducing step, continues to move down to limit upper seal bore 3.

Further, being provided at both ends with for drain plunger tube 5 passes fluid apertures 1；Spiracle 4 is provided with the side wall of lower seal cylinder 7, Spiracle 4 is located at the bottom of reducing step, for being connected with oil jacket annular space.

Further, the outer cover of drain plunger tube 5 is provided with retainer ring 8, and retainer ring is located at the top of upper seal bore 3, is used for Upper seal bore 3 is pressed during pushing, upper seal bore 3 is pressed into lower seal cylinder 7 by the retainer ring on the top of drain plunger tube 5 It is interior.

Further, fixed anchor fluke 2 is provided with the internal face of lower seal cylinder 7, it is logical that upper seal bore 3 pushes rear lower seal cylinder 7 Cross fixed anchor fluke and fastened with upper seal bore 3 and is connected, upper seal bore 3 can be deviate from using sealing drum 3 is put in certain strength, can It is proposed and be seated in repeatedly to realize.

A kind of course of work of pumpingh well straight-down negative load reducer of the present utility model is described below in conjunction with the accompanying drawings：

Oil pipe column from bottom to top is followed successively by：Pump barrel, two oil pipes, the lower seal cylinder of load reducer, oil recovery oil pipe；Under Sucker rod tubing string on and is followed successively by：Pump plunger, sucker rod, drain plunger tube, the sucker rod of load reducer.Wherein, pump barrel is with subtracting The length for carrying the oil pipe between the lower seal cylinder of device is equal to the length of the sucker rod between pump plunger and the drain plunger tube of load reducer Degree.

Specifically, after sucker rod drives drain plunger tube 5 to go into the well in place, upper seal bore 3 is pushed into lower seal cylinder 7 It is interior, and be sitting on the reducing step of lower seal cylinder 7 in lower seal cylinder 7, and interlocked by fixed anchor fluke 2 with lower seal cylinder 7 Close, now pump plunger is then completely into pump barrel.

Also, during the production of machine pumping, sucker rod drives drain plunger tube 5 to be moved up and down in upper seal bore 3, simultaneously Lightening piston 6 is driven to pump, the liquid level in oil pipe is higher than oil jacket annular space, and oily overpressure passes through drain plunger tube 5 The lower surface of lightening piston 6 is passed to, more than upper end surface pressure, upper surface is then connected by exhaling hole 4 with oil jacket annular space, and promotion subtracts Carry piston 6 to move upwards, play off-load effect, alleviate pumping unit horsehead polished rod load, supporting oil pumping well depth is taken out.

A kind of pumpingh well straight-down negative load reducer of the present utility model, solve pursuit of advanced studies under pumpingh well and consumed energy into crude oil production Greatly, the problem of cost is high, benefit is low, there is load shedding, energy-conservation, the benefit of synergy, considerably reduce production cost, can also fit For thin oil, heavy crude well；Pumping unit horsehead polished rod load is alleviated, supporting oil pumping well depth is taken out；Rod string is reduced to stretch, Loss of plunger stroke is reduced, improves computer collecting system efficiency, reduces production cost；Realize sucker rod connection drain plunger tube, upper seal bore, The direct-connected tripping in of lightening piston, oil pump plunger piston, in place after can form Load Alleviation Function, fault rate is low, pass through straight-down negative, even Connect fastening, tensile strength is high, can tripping in plunger upper part, suitable for thin oil and heavy oil wells, play off-load and improve pumpingh well system Efficiency, reduce cost for oil production effect.

The utility model is further described by specific embodiment above, it should be understood that, have here The description of body, should not be construed as the restriction to spirit and scope of the present utility model, and one of ordinary skilled in the art is readding The various modifications made after reader specification to above-described embodiment, belong to the scope that the utility model is protected.

Claims

1. a kind of pumpingh well straight-down negative load reducer, it is characterised in that including the lower seal cylinder being connected by oil pick-up tube with pump barrel (7) the drain plunger tube (5) that sucker rod is connected with plunger, the top of drain plunger tube (5), are provided with lower seal cylinder (7) Portion is provided with upper seal bore (3), and bottom is provided with lightening piston (6), and lightening piston (6) is located at close with in lower seal cylinder (7) Sealed tube (7) clearance seal, push drain plunger tube (5) and drive upper seal bore (3) mobile and lightening piston (6) is pressed into lower seal In cylinder (7).

2. pumpingh well straight-down negative load reducer according to claim 1, it is characterised in that lower seal cylinder (7) includes reducing platform Rank, the internal diameter on reducing step top are more than the internal diameter of bottom, and drain plunger tube (5) drives upper seal bore (3) to push and is sitting in reducing On step, moved down with limiting upper seal bore (3).

3. pumpingh well straight-down negative load reducer according to claim 1, it is characterised in that the both ends of drain plunger tube (5) are set It is equipped with and passes fluid apertures (1).

4. pumpingh well straight-down negative load reducer according to claim 2, it is characterised in that set in the side wall of lower seal cylinder (7) Spiracle (4) is equipped with, spiracle is located at the bottom of reducing step, for being connected with oil jacket annular space.

5. pumpingh well straight-down negative load reducer according to claim 1, it is characterised in that the outer cover of drain plunger tube (5) Provided with retainer ring (8), retainer ring is located at the top of upper seal bore (3), and upper seal bore (3) is pushed down into lower seal cylinder by retainer ring (7) in.

6. pumpingh well straight-down negative load reducer according to claim 1, it is characterised in that on the internal face of lower seal cylinder (7) Fixed anchor fluke (2) is provided with, upper seal bore (3) pushes rear lower seal cylinder (7) and detained by fixed anchor fluke (2) with upper seal bore (3) Close and be connected.