CN209083532U - A kind of displacement variable oil-well pump - Google Patents

Abstract

The utility model provides a kind of displacement variable oil-well pump, including pump barrel, plunger, the pump barrel includes big pump barrel, the plunger includes small plunger, movable plunger, the movable plunger is sleeved on small plunger outer wall, the movable plunger inner wall is connect by on-off connector with small plunger outer wall, and the small plunger, movable plunger are respectively positioned on inside big pump barrel.The utility model has structure concentric inside and outside big small plunger, and hydraulic action realizes the automatic uncoupling of component, achievees the purpose that automatic conversion pumps diameter.The heat utilization rate for improving steam-stimulated well, extends manufacture cycle.

Description

A kind of displacement variable oil-well pump

Technical field

The utility model relates to the oil recovery technique of petroleum industry, especially a kind of displacement variable oil-well pump.

Background technique

With the exploitation of steam-stimulated well, early period, Quick drainage was gradually increased with the contradiction that the later period recovers the oil at a slow speed, became discharge capacity The demand of oil recovery technique increasingly increases.A kind of predominantly upper and lower plunger cascaded structure of existing displacement variable oil-well pump, top is big Pump, lower part are small pump, are produced when becoming discharge capacity by adjusting rod string to switch big pump and small pump.

Problem of the existing technology: must go up operation when 1, becoming discharge capacity, time-consuming and laborious；2, it cannot achieve note and adopt one Change.Just because of these problems, there is no substantive applications for the prior art.

Application number: 201710080453.3, publication date 2017-08-29 discloses variable capacity oil pump.Variable capacity oil pump Including adjusting part, which is configured to be shifted according to the variation of the pressure on the inside of control grease chamber.This is adjustable Saving component has long hole.Guide pin is disposed on the inside of long hole.The guide pin is fixed to the shell or lid of variable capacity oil pump.It is leading On the length direction of pin farther away from the long hole of the fixing end of guide pin a part place long hole width greater than closer to Width at a part of the long hole of the fixing end.

Application number: 201611228900.7, publication date 2018-06-01 disclose a kind of a kind of change discharge capacity pumping of Multi-stage plunger Oil pump, including pump barrel, fixed valve pair, travelling valve pair, eccentrically arranged valve pair, plunger etc.；Wherein, the hollow cavity of pump barrel, which is divided into, is connected The first cylindric pump chamber and the second cylindric pump chamber, and the internal diameter of the first cylindric pump chamber is less than in the second cylindric pump chamber Diameter, fixed valve pair are connected to one end of the first cylindric pump chamber, and plunger is arranged in pump barrel, the hollow cavity of shape and pump barrel Match；Travelling valve pair is arranged at the plunger inlet in the first cylindric pump chamber, and the setting of eccentrically arranged valve pair is cylindric first In on plunger in pump chamber, and close to travelling valve vice division chief；Oil-release valve cover is connected with the plunger top in the second cylindric pump chamber, draws Bar is connected with oil-release valve cover, and extend out to outside pump barrel.The plunger and pump barrel of the utility model have been all made of two-level configuration, right respectively Different pump diameters is answered, the switching between different pump diameters is realized using different strokes, two kinds of discharge capacities is respectively corresponded, greatly expands The displacement range of oil well pump.

Application number: 201010197029.5, publication date 2010-09-29 disclose a kind of displacement variable oil-well pump, big to pump Cylinder, connecting tube, inlet valve, small pump barrel are sequentially connected, and big plunger, delivery valve, disconnecting device are sequentially connected, and delivery valve and uncoupling fill There is oil inlet between the upper body set, the diameter of the upper body of disconnecting device is less than the internal diameter of big pump barrel, and the internal diameter of connecting tube is greater than big The internal diameter of pump barrel makes its big pump barrel lower part and connecting tube top junction generate release shoulder, the upper body of disconnecting device and uncoupling The lower body of device can disengage at release shoulder.The combination of big pump barrel and connecting tube, forms the release shoulder of disconnecting device, can To realize the change of oil pumping pumpage using common disconnecting device, since the lower body outer diameter of common disconnecting device is greater than release The internal diameter of shoulder, therefore, will only be mentioned on disconnecting device release shoulder after could discharge, as long as disconnecting device can above be mentioned to Release shoulder can discharge, and therefore, the utility model can reliably change discharge capacity, extend the oil well production period, have significant Economic benefit.

Oil well pump described in existing patent 201010197029.5, using big plunger upper, small plunger is upper under Lower series system, pump barrel corresponding with plunger are also classified into big pump barrel and small pump barrel, and two pump barrels are also upper and lower tandem compound one It rises, sealing subsystem so just includes big plunger, small plunger, big pump barrel, four independent parts of small pump barrel.And the application In have a part " movable plunger 4 ", which is processed into piston structure, and inner surface treatment is at pump barrel structure, because This, " movable plunger 4 ", which is equivalent to, is incorporated into a part big plunger and small pump barrel, and sealing pair only includes big pump barrel, activity Plunger, three independent parts of small plunger, and just because of this design, form size pump barrel, big small plunger " interior outsourcing Containing " structure type, be different from the structure type of " up and down series connection " of existing patent.Meanwhile the matched uncoupling dress of the application institute Setting is also to realize " inside and outside uncoupling ", is different from " the upper and lower uncoupling " of existing patent.The shape of this " inside and outside to include "+" inside and outside uncoupling " Formula, advantage is to automatically switch pump diameter (by the oil jacket pressure difference in later period) in the case where motionless sucker rod may be implemented, thus certainly Dynamic transformation discharge capacity.And existing patent, it is necessary to pump diameter switching is carried out by adjusting rod string, then necessary when adjustment sucker rod Upper operation, upper equipment, upper personnel are time-consuming and laborious.

Application number: 201510761620.1, publication date 2016-04-27 disclose a kind of displacement variable oil-well pump, by big Pump barrel, big plunger, small plunger, upper outer cylinder, lower outer cylinder, anchoring locking device composition；Big plunger base is equipped with inlet valve；Small plunger Top is equipped with delivery valve；Anchoring locking device is socketed in lower outer cylinder bottom；Wherein, big pump barrel, upper outer cylinder and lower outer cylinder be successively Series connection forms hollow outer cylinder；Huge pillar plug is socketed in it, big plunger inner sleeve connects small plunger.The structure design of the utility model is reasonable, Technical feasibility, the large and small mating well head of plunger cascaded structure become discharge capacity roofbolt, realize the row between different displacements coefficient oil well pump Amount conversion and pressure break pumping connection make function, easy to operate.It is greatly improved discharge speed, shortening turn is found time and the drain period； The pollution of fracturing fluid or acid solution to stratum can be effectively reduced, production efficiency is improved, meets motionless pipe after exploration well oil test fracture acidizing Column, large discharge pump drain and small displacement pump ask the requirement of production.

First, have oil well pump described in patent 201510761620.1, fixed valve is same with the pump housing in the bottom of pump The heart；And the fixed valve of the application is biased in side, position and the structure of fixed valve are all different.Second, have patent Oil well pump described in 201510761620.1, does not have a disconnecting device, when conversion pump diameter, in its abstract " mating well head becomes discharge capacity roofbolt " is exactly needed, operation is also needed, upper equipment, upper personnel are time-consuming and laborious, and the application The form of " inside and outside to include "+" inside and outside uncoupling ", (by the oil jacket pressure difference in later period) in the case where motionless sucker rod may be implemented, from Dynamic switchable pump diameter, thus auto-changing discharge capacity.Third, the application design have sealed plunger and sealing pump barrel, can be realized fluid power Feedback function (utilizes oil jacket pressure difference, apply a downward additional force to roofbolt), the more conducively oil recovery of steam-stimulated well.

Utility model content

The purpose of this utility model is to provide a kind of displacement variable oil-well pumps, have structure concentric inside and outside big small plunger, Hydraulic action realizes the automatic uncoupling of component, achievees the purpose that automatic conversion pumps diameter.The heat utilization rate for improving steam-stimulated well, prolongs The long production period.

The purpose of this utility model can be achieved by the following technical measures:

The displacement variable oil-well pump includes pump barrel, plunger, and the pump barrel includes big pump barrel, and the plunger includes small plunger, work Dynamic plunger, the movable plunger are sleeved on small plunger outer wall, and the movable plunger inner wall is connected by on-off connector and small plunger outer wall It connects, the small plunger, movable plunger are respectively positioned on inside big pump barrel.

The purpose of this utility model can be also achieved by the following technical measures:

The big pump barrel lower end connection sealing pump barrel, small plunger lower end connect sealed plunger, and sealed plunger operates in sealing In pump barrel.

An eccentric fixed valve is installed in the lower pump barrel lower end side, installs travelling valve in small plunger lower port, wherein Fixed valve, the lower port of small plunger, travelling valve, small plunger upper port can successively be connected to.

The on-off connector includes on-off connector head, spring, the inner end of the spring be connected to small plunger outer wall open up it is outer recessed In slot, the inner end of the outer end connection on-off connector head of spring, the outer end of the on-off connector head extend into work by the external support force of spring In the inner groovy that dynamic plunger inner wall opens up.

The on-off connector head corner angle and lower corner angle position on the outer end of itself open up uncoupling inclined-plane, likewise, in work The inner groovy inclined-plane matched with uncoupling inclined-plane is offered in the inner groovy of dynamic plunger.

The big pump barrel inner wall, which offers barrier activity plunger, to be continued uplink and is allowed to the interior upper limit platform to fall off, described big Pump barrel inner wall also opens up the interior middle limiting stand that barrier activity plunger continues traveling downwardly, and the big pump barrel inner wall is also provided with blocking pillar Fill in the interior lower limit platform continued traveling downwardly.

Small plunger upper end connecting with pumping rod.

The utility model has the following beneficial effects:

Small plunger upper end connecting with pumping rod, the inner-wall reinforced of movable plunger are processed into pump barrel structure, outer wall intensive treatment at Piston structure, therefore movable plunger can be used as small pump barrel and use, and can also combine to form big plunger use with small plunger.The oil well pump Design has on-off connector, by the docking and disengagement of on-off connector 3, realizes the conversion of big pump and small pump.It is put forward for the first time in big small plunger Outer concentric structure；Hydraulic action realizes the automatic uncoupling of component, achievees the purpose that automatic conversion pumps diameter.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model embodiment；

Fig. 2 is the utility model disjointed device header structure figure.

In figure: sucker rod 1, big pump barrel 2, on-off connector 3, movable plunger 4, small plunger 5, travelling valve 6, fixed valve 7, canned pump Cylinder 8, sealed plunger 9, on-off connector head 10, spring 11.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1 to Fig. 2 is please referred to, the utility model provides a kind of technical solution: a kind of displacement variable oil-well pump, including pump barrel, Plunger, the pump barrel include big pump barrel 2, and the plunger includes small plunger 5, movable plunger 4, and the movable plunger 4 is sleeved on small 5 outer wall of plunger, the movable plunger inner wall are connect by on-off connector 3 with small plunger outer wall, the equal position of the small plunger, movable plunger Inside big pump barrel 2.Small plunger, movable plunger are that coaxial core type is set in together.

The big pump barrel lower end connection sealing pump barrel 8, small plunger lower end connect sealed plunger 9, and sealed plunger operates in close It seals in pump barrel.

An eccentric fixed valve 7 is installed in the lower pump barrel lower end side, installs travelling valve 6 in small plunger lower port, Middle fixed valve, the lower port of small plunger, travelling valve, small plunger upper port can successively be connected to.

The on-off connector includes on-off connector head 10, spring 11, and the inner end of the spring is connected to what small plunger outer wall opened up In external groove, the inner end of the outer end connection on-off connector head of spring, the outer end of the on-off connector head is protruded by the external support force of spring In the inner groovy opened up to movable plunger inner wall.

The on-off connector head corner angle and lower corner angle position on the outer end of itself open up uncoupling inclined-plane, likewise, in work The inner groovy inclined-plane matched with uncoupling inclined-plane is offered in the inner groovy of dynamic plunger.

The big pump barrel inner wall, which offers barrier activity plunger, to be continued uplink and is allowed to the interior upper limit platform to fall off, described big Pump barrel inner wall also opens up the interior middle limiting stand that barrier activity plunger continues traveling downwardly, and the big pump barrel inner wall is also provided with blocking pillar Fill in the interior lower limit platform continued traveling downwardly.

Small plunger upper end connecting with pumping rod 1.

When construction, movable plunger 4 is preset in big pump barrel 2, with oil pipe G.I.H.Small plunger 5 and sealed plunger 9 with 1 G.I.H of sucker rod, the docking of on-off connector 3 is completed when touching pump, and movable plunger 4 and small plunger 5 are fixed together to form one Big plunger realizes big pump lifting, huge discharge operation as roofbolt moves up and down.The decline of later period well fluid level, oil jacket pressure difference increase When disengaging pressure difference to on-off connector 3 greatly, small plunger 5 and movable plunger 4 are disengaged, and small plunger 5 is above mentioned 20cm as lower dead center, is realized Small pump lifting, small displacement operation.

The technology can be applied in steam-stimulated well, realize the Auto-matching of hole condition and discharge capacity, shorten drainage period, improve Heat utilization rate.It has a extensive future.

" inside and outside to include " of the application+" inside and outside uncoupling " form may be implemented in the case where motionless sucker rod (after dependence The oil jacket pressure difference of phase), automatically switch pump diameter, thus auto-changing discharge capacity.Third, the application design have sealed plunger and canned pump Cylinder can be realized hydraulic feedback function (using oil jacket pressure difference, applying a downward additional force to roofbolt), and more conducively steam gulps down The oil recovery of Tu Jing.

In the description of the present invention, it should be understood that temporald eixis or positional relationship are based on the figure Orientation or positional relationship is merely for convenience of description the utility model, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (7)

1. a kind of displacement variable oil-well pump, including pump barrel, plunger, which is characterized in that the pump barrel includes big pump barrel, the plunger packet Include small plunger, movable plunger, the movable plunger is sleeved on small plunger outer wall, the movable plunger inner wall by on-off connector with it is small Plunger outer wall connection, the small plunger, movable plunger are respectively positioned on inside big pump barrel.

2. a kind of displacement variable oil-well pump according to claim 1, which is characterized in that the big pump barrel lower end connects canned pump Cylinder, small plunger lower end connect sealed plunger, and sealed plunger operates in sealing pump barrel.

3. a kind of displacement variable oil-well pump according to claim 1 or 2, which is characterized in that the big pump barrel lower end side peace Fill an eccentric fixed valve, small plunger lower port install travelling valve, wherein fixed valve, the lower port of small plunger, travelling valve, The upper port of small plunger can be successively connected to.

4. a kind of displacement variable oil-well pump according to claim 1 or 2, which is characterized in that the on-off connector includes on-off connector Head, spring, the inner end of the spring are connected in the external groove that small plunger outer wall opens up, the outer end connection on-off connector head of spring The outer end of inner end, the on-off connector head is extend into the inner groovy that movable plunger inner wall opens up by the external support force of spring.

5. a kind of displacement variable oil-well pump according to claim 4, which is characterized in that outer end of the on-off connector head at itself Upper corner angle and lower corner angle position open up uncoupling inclined-plane, likewise, offering in the inner groovy of movable plunger and uncoupling inclined-plane The inner groovy inclined-plane matched.

6. a kind of displacement variable oil-well pump according to claim 1 or 2, which is characterized in that the big pump barrel inner wall offers Barrier activity plunger continues uplink and is simultaneously allowed to the interior upper limit platform to fall off, the big pump barrel inner wall also open up barrier activity plunger after The interior middle limiting stand of continuous downlink, the big pump barrel inner wall are also provided with the interior lower limit platform for stopping small plunger to continue traveling downwardly.

7. a kind of displacement variable oil-well pump according to claim 1 or 2, which is characterized in that the small plunger upper end connection is taken out Beam hanger.