CN108661894A

CN108661894A - A kind of well liquid drive oil pumping power pump head

Info

Publication number: CN108661894A
Application number: CN201810655966.7A
Authority: CN
Inventors: 周华梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-23
Filing date: 2018-06-23
Publication date: 2018-10-16

Abstract

The present invention provides a kind of well liquid drive oil pumping power pump head.It includes hydraulic pump, closed cylinder body, first stage piston and second piston that the well liquid, which drives oil pumping power pump head,；Second piston is mutually fixedly connected by second piston rod with the front surface of first stage piston；The front of cylinder body is provided with the secondary cavity to match with second piston；In cylinder body, the rear of secondary cavity, be close to secondary cavity and be provided with level-one chamber；Level-one chamber matches with first stage piston；First stage piston is connected by first stage piston bar with drawing device, and first stage piston bar runs through the wall at cylinder body rear portion；In cylinder body.It is respectively to separate with second piston, first stage piston, forms closed first piston chamber, second piston chamber and third plunger shaft；Hydraulic pump is connected by least one high voltage power liquid delivery pipe with third plunger shaft.The well liquid of the embodiment of the present invention, which drives oil pumping power pump head, can improve the lack of uniformity of piston load, reduce pressure oscillation, and then prevent hydraulic pump from damaging.

Description

A kind of well liquid drive oil pumping power pump head

Technical field

The invention belongs to exploitation of oil-gas field petroleum lifting technical fields more particularly to well liquid to drive oil pumping power pump head.

Background technology

In the existing artificial lift technology transmitted applied to oil, there is a kind of artificial lifting way to be lifted for no bar.Such as oil The hydraulic piston pump oil recovery of Tanaka's application belongs to no bar lifting, and hydraulic pump system is that the hydraulicdriven no bar pumping of one kind is set It is standby, be it is a kind of for from oil well lift oil equipment, it be by Surface power drive pump power fluid is pressurized after through oil pipe or specially It is pumped into piston and master control guiding valve in down-hole drive oil cylinder with channel, piston is made to pump, drawing device is driven to inhale The oil drawn is pumped out afterwards spontaneously and is lifted to ground.Here drive cylinder, that is, well liquid drives oil pumping power pump head, by cylinder body The piston being arranged in cylinder body is constituted, and hydraulic oil is to enter cylinder body by relevant valve and high voltage power liquid transfer pipeline Inside, pressure makes piston be lifted and then pulls drawing device, is packing with piston in cylinder body, is pulled and drawn with piston lifting The direction of device is front, is to separate with piston, forms former and later two sealed chambers.

In the prior art, it is however generally that, when driving drawing device strike the oil, piston is living during lifting and decline Plug load is serious unbalanced, and power fluid pressure is high when lifting, and speed uplink is slow；Power fluid pressure is low when decline, and downstream rate is fast, Thus system pressure is caused to fluctuate, greater impact is caused to hydraulic pump, the damage of hydraulic pump pump head is made to fall off when serious.In addition, institute Since piston moves in cylinder body, and oil sealing is substantially leaned in the sealing between piston and cylinder body, and this sealing means are because of piston Larger diameter is very easy to leakage so that the front chamber of piston also has a small amount of power fluids.At this moment, when piston is lifted Lifting resistance can be formed, hydraulic pump is further increased（That is kinetic pump）Pressure, to exclude the indoor power fluid of ante-chamber.Meanwhile When piston declines, and the pressure that detaches of hydraulic pump can be reduced, front chamber can absorb power fluid.

Invention content

There are unbalanced defects for piston load when being lifted and decline without bar hoisting system piston for the prior art, originally Invention provides a kind of well liquid drive oil pumping power pump head, can improve the lack of uniformity of load, reduce pressure oscillation, and then prevent Hydraulic pump damages.

Technical scheme is as follows：

A kind of well liquid drive oil pumping power pump head, it includes hydraulic pump, closed cylinder body, level-one work which, which drives oil pumping power pump head, Plug and at least one second piston；

The second piston is mutually fixedly connected by second piston rod with the front surface of the first stage piston；The second piston Diameter is less than the diameter of first stage piston；

Using the lifting direction of piston as front, the front of the cylinder body is provided with the secondary chamber to match with the second piston Room, the diameter of the secondary cavity is consistent with the second piston, and the depth of the secondary cavity is the thickness of second piston Add the length of second piston rod；

The rear of interior, the described secondary cavity of the cylinder body, is close to the secondary cavity and is provided with level-one chamber；The level-one chamber Match with the first stage piston；

The first stage piston is connected by first stage piston bar with drawing device, and the first stage piston bar runs through the cylinder body rear portion Wall；

It is to separate with second piston, the front of the secondary cavity and the front surface of second piston are enclosed closed first and live Fill in chamber；The front surface enclosing at the rear portion of the secondary cavity, the rear surface of second piston, the front of level-one chamber, first stage piston Form second piston chamber；The rear portion of the level-one chamber and the rear surface of first stage piston are enclosed third plunger shaft；

The hydraulic pump is connected by least one high voltage power liquid delivery pipe with the third plunger shaft.

Above-mentioned well liquid drives in oil pumping power pump head, it is preferred that it includes two that the well liquid, which drives oil pumping power pump head, High voltage power liquid delivery pipe.

Above-mentioned well liquid drives in oil pumping power pump head, it is preferred that it further includes sealing that the well liquid, which drives oil pumping power pump head, The joining place of the wall in the first stage piston bar Yu the cylinder body rear portion is arranged in circle, the sealing ring.

In this explanation, first piston chamber, second piston chamber and third plunger shaft are independent airtight chamber.

Beneficial effects of the present invention are：

The well liquid of the present invention, which drives oil pumping power pump head, can improve the lack of uniformity of piston load, reduce pressure oscillation, in turn Prevent hydraulic pump from damaging.

Description of the drawings

It is required in being described below to embodiment in order to illustrate more clearly of the technical solution in embodiment of the present invention Attached drawing to be used is briefly described.Attached drawing described here is only used for task of explanation, and is not intended to limit in any way Make range disclosed in the present application.In addition, the shape and proportional sizes etc. of each component in figure are only schematical, it is used to help pair The understanding of this specification is not the specific shape and proportional sizes for limiting each component of this specification.Those skilled in the art Under the introduction of this specification, various possible shapes and proportional sizes can be selected to implement this explanation as the case may be Book.In the accompanying drawings：

Fig. 1 is that the well liquid of embodiment drives the structural schematic diagram of oil pumping power pump head.

Specific implementation mode

It should be noted that when a parts are referred to as " being set to " another parts, it can be directly another On a parts or there may also be parts placed in the middle.When a parts are considered as " connection " another parts, It can be directly to another parts or may be simultaneously present parts placed in the middle.Term used in this specification " vertical ", "horizontal", "left", "right" and similar statement are for illustrative purposes based on Figure of description, are not offered as It is unique embodiment.

Unless otherwise defined, technical and scientific term all used in this specification is led with the technology for belonging to the application The normally understood meaning of technical staff in domain is identical.Term as used in this specification is intended merely to describe specific embodiment party The purpose of formula, it is not intended that in limitation the application.Term "and/or" used in this specification includes one or more relevant Any and all combinations of Listed Items.

Embodiment：

The present embodiment provides well liquids to drive oil pumping power pump head, as shown in Figure 1, it includes hydraulic pressure that the well liquid, which drives oil pumping power pump head, Pump 11, closed cylinder body 13, first stage piston 31 and three second pistons 21；

Three second pistons 21 pass through the front surface phase of three second piston rods 23 and the first stage piston 31 respectively It is fixedly connected；The diameter of the second piston 21 is less than the diameter of first stage piston 31；

Using the lifting direction of piston as front, the front of the cylinder body 13 is provided with the two level to match with the second piston 21 Chamber 22, the diameter of the secondary cavity 22 is consistent with the second piston 21, and the depth of the secondary cavity 22 is two level The thickness of piston 21 adds the length of second piston rod 23；The second piston 21 reciprocatingly slides in the secondary cavity 22；

In the cylinder body 13, the rear of the secondary cavity 22, be close to the secondary cavity 22 and be provided with level-one chamber 32；It is described Level-one chamber 32 matches with the first stage piston 31；

The first stage piston 31 is connected by first stage piston bar 33 with drawing device, and the first stage piston bar 33 runs through the cylinder The wall at 13 rear portion of body；The first stage piston 31 reciprocatingly slides in the level-one chamber 32；

It is separation with second piston 21, the front of the secondary cavity 22 and the front surface of second piston 21 are enclosed closed First piston chamber；The rear portion of the secondary cavity 22, the rear surface of second piston 21, the front of level-one chamber 32, first stage piston 31 front surface is enclosed second piston chamber；The rear portion of the level-one chamber 32 and the rear surface of first stage piston 31 are enclosed Third plunger shaft；First piston chamber, second piston chamber and third plunger shaft are independent airtight chamber.

The hydraulic pump 11 is connected by least one high voltage power liquid delivery pipe 12 with the third plunger shaft.

In one further embodiment, which drives the high voltage power liquid conveying that oil pumping power pump head includes two Pipe 12.Two high voltage power liquid delivery pipes 12 can be simultaneously as the pipeline for conveying and extracting hydraulic pump power fluid, can also One as conveying, a pipeline as extraction, such setting can share pressure difference.And wherein one is used as power fluid Transfer pipeline, another to extract pipeline as power fluid be best embodiment, can ensure pipeline only by a kind of pressure in this way Power need not convert, and reduce the pressure oscillation of pipeline, prevent the variation of pipeline pressure difference from bursting greatly.

In one further embodiment, it further includes sealing ring 34, the sealing which, which drives oil pumping power pump head, The joining place of the wall in the first stage piston bar 33 Yu 13 rear portion of the cylinder body is arranged in circle 34.

It is such that the well liquid of the present invention, which drives the principle of oil pumping power pump head or application method,：

In the present invention, being reciprocatingly slided in secondary cavity using second piston, when second piston declines, first piston chamber is formed, First piston chamber is the chamber of a negative pressure, close to vacuum.Meanwhile first stage piston declines, second piston chamber can also form negative Pressure.The presence of two kinds of negative pressure so that hydraulic pump needs certain intensity when extracting power fluid.And enters piston and be lifted the stage When, two negative pressure will produce certain power, and hydraulic pump is helped to carry out operation, reduce the pressure of hydraulic pump output power fluid, into And so that hydraulic pump output and the pressure difference extracted become smaller, pressure oscillation is reduced, and then prevent hydraulic pump from damaging.In addition, two level The presence of chamber, but also from and the power fluid that leaks into of piston pump edge there are certain memory spaces, it is only necessary to often cross one The cleaning of section time, will not cause additional active force.

As it can be seen that the well liquid of the embodiment of the present invention, which drives oil pumping power pump head, can improve the lack of uniformity of piston load, subtract Small pressure oscillation, and then prevent hydraulic pump from damaging.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with The difference of other embodiment, the same or similar parts between the embodiments can be referred to each other.

The basic principles and main features and advantages of the present invention of the present invention have been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement is both fallen in the scope of protection of present invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims

1. a kind of well liquid drives oil pumping power pump head, it is characterised in that：The well liquid drive oil pumping power pump head include hydraulic pump, it is close Close cylinder body, first stage piston and at least one second piston；

2. well liquid according to claim 1 drives oil pumping power pump head, it is characterised in that：The well liquid drives oil pumping kinetic pump Head includes two high voltage power liquid delivery pipes, wherein one is extracted as power fluid transfer pipeline, another as power fluid Pipeline.

3. well liquid according to claim 1 drives oil pumping power pump head, it is characterised in that：The well liquid drives oil pumping kinetic pump Head further includes sealing ring, and the joining place of the wall in the first stage piston bar Yu the cylinder body rear portion is arranged in the sealing ring.