CN2793374Y

CN2793374Y - Integrated pressing oil-submerged electric pump

Info

Publication number: CN2793374Y
Application number: CN 200520020095
Authority: CN
Inventors: 邵永实; 邓辉; 杨延军; 杨元建; 董振刚; 刘宇蕾; 赵晶
Original assignee: Daqing Oilfield Powerlift Pump Industry Co Ltd
Current assignee: Daqing Oilfield Powerlift Pump Industry Co Ltd
Priority date: 2005-01-14
Filing date: 2005-01-14
Publication date: 2006-07-05
Anticipated expiration: 2015-01-14

Abstract

An integrated pressing oil-submerged electric pump chiefly solves the poor performance of the anti-sand erosion with axial direction in the prior oil-submerged electric pump. The utility model is characterized in that: a pump shaft (1) used for adjusting the lower part of a distance sleeve (2) is sheathed with a lock sleeve (3) with stages inside and outside the lock sleeve; two semi-circle rings (4) are arranged in the stage hole of the lock sleeve (3) and the concave gutter of the pump shaft (1); the outer side of the lock sleeve (3) is connected with a lock nut (5) via a screw thread; the radial direction hole of the lock nut's (5) lower part is connected with a jack screw (6) via a nut; the inner end of the jack screw (6) contacts the upper part of the lock nut's (5) outer stage; the inner baffle (8) of a splined sleeve (7) is provided with an adjusting shim (9) that contacts the pump shaft (1). The integrated pressing oil-submerged electric pump not only is provided with the strong performance of the anti-sand erosion with axial direction in sand wells, but also can enhance the pumping efficiency and the running life of multi-computer.

Description

Whole compression type submersible electric pump

Technical field:

The utility model relates to the used electric pump of oil recovery field, oil field oil well, particularly whole compression type submersible electric pump.

Background technique:

In oil recovery field, oil field, the electric submersible centrifugal pump unit is considered to a kind of both economical effective oil production method, can extract a large amount of formation fluid from the oil well of darker different situations.Electric Submersible Pump Unit is made up of oil-submersible motor, protector, gas-liquid separator and pump etc.Existing submersible electric pump is owing to no axial anti-sand and prevent the ability of axially wearing and tearing, when well liquid medium sand pledge content is higher, cause the axial thrust position serious wear of impeller and guide wheel, make axial anti-sand cutting ability, and then cause that Electric Submersible Pump Unit produces that serious vibration, impeller shaft power descends significantly, lifting lift and decrease in efficiency, increase the bad phenomenon such as load of unit electrical system, cause unit to damage at last.

The model utility content:

In order to overcome the deficiency of the existing axial anti-sand cutting poor performance of submersible electric pump, the utility model provides a kind of whole compression type submersible electric pump, this integral body compression type submersible electric pump not only has strong axial anti-sand cutting performance in containing sand drain, and can improve pump efficiency and unit running life.

The technical solution of the utility model is: this integral body compression type submersible electric pump comprises the adjustment spacer that is nested on spline housing and the pump shaft, be with the lock sleeve of inside and outside band stage on the pump shaft of adjustment spacer lower end mutually, be built-in with two semicircular ring with the pump shaft groove in the lock sleeve step hole, lock sleeve is outer by the lock nut that has been threaded, be connected with jackscrew by nut in the radial hole of lock nut lower end, jackscrew the inner is touched stage upper end outside lock nut mutually, and retaining is pulled and is equipped with the spacer that touches mutually with pump shaft in the spline housing.

The beneficial effect that the utlity model has is: this integral body compression type submersible electric pump is owing to adopted such scheme; spindle nose spacer when in oil-immersed pump, having increased the work of impeller string under lock nut axial direction positioning device and the axle; make the oil-immersed pump impeller; the axial thrust position is in contactless state about during guide wheel work; the impeller string is in the state of suspension of requirement when making pump work; impeller suspended is in the chamber of facing two guide wheels formation mutually; the axial force transmission that produces is given protector; the chiltern thing was difficult for accumulating under the percussion of liquid stream when pump was worked in containing sand drain like this; impeller under the axial force of impeller effect; the chiltern thing; the guide wheel three is compressing not axially, the axial wearing and tearing of self thrust surface do not take place and under the effect of axial force of impeller with well liquid in the rigid grinding of chiltern.Thereby the working position of control impeller and guide wheel has been avoided the axial wearing and tearing between impeller and guide wheel preferably when the unit proper functioning, makes integral body compress the impeller of oil-immersed pump and guide wheel and strengthens greatly in the sand control abrasion performance at axial thrust position up and down.Axial anti-grittiness can increase substantially, and can avoid between impeller and the guide wheel self axially wearing and tearing and take place with the axial grinding phenomenon of gravel in the well liquid preferably, prolongs pump and contains working life in the sand drain at height, effectively reduces production costs.

Description of drawings:

Accompanying drawing 1 is a structure sectional view of the present utility model.

1-pump shaft among the figure, 2-adjusts spacer, the 3-lock sleeve, 4-two semicircular ring, the 5-lock nut, the 6-jackscrew, the 7-spline housing, the 8-retaining is pulled the 9-spacer.

Embodiment:

Below in conjunction with accompanying drawing will the utility model is described in further detail:

By shown in Figure 1, this integral body compression type submersible electric pump comprises the adjustment spacer 2 that is nested on spline housing 7 and the pump shaft 1, be with the lock sleeve 3 of inside and outside band stage on the pump shaft 1 of adjustment spacer 2 lower ends mutually, be built-in with two semicircular ring 4 with pump shaft 1 groove in lock sleeve 3 step holes, lock sleeve 3 is outer by the lock nut 5 that has been threaded, be connected with jackscrew 6 by nut in the lock nut 5 lower end radial holes, jackscrew 6 the inners are touched stage upper end outside lock nut 5 mutually, and retaining is pulled and is equipped with the spacer 9 that touches mutually with pump shaft 1 on 8 in the spline housing 7.Thereby the axial thrust position is in contactless state about when making oil-immersed pump impeller, guide wheel work; the impeller string is in the state of suspension of requirement when making pump work; impeller suspended is in the chamber of facing two guide wheels formation mutually; the axial force transmission that produces is given protector; the chiltern thing was difficult for accumulating under the percussion of liquid stream when pump was worked in containing sand drain like this; not axially compressing of impeller, chiltern thing, guide wheel three under the axial force of impeller effect, the axial wearing and tearing of self thrust surface do not take place and under the effect of axial force of impeller with well liquid in the rigid grinding of chiltern.And then when the unit proper functioning, avoided axial wearing and tearing between impeller and guide wheel preferably, the sand control abrasion performance that makes integral body compress oil-immersed pump strengthens greatly.Axial anti-grittiness can increase substantially, and prolongs pump and contains working life in the sand drain at height, effectively reduces production costs.

Claims

1, a kind of whole compression type submersible electric pump, comprise the adjustment spacer (2) that is nested on spline housing (7) and the pump shaft (1), it is characterized in that: the lock sleeve (3) that is with inside and outside band stage on the pump shaft (1) of adjustment spacer (2) lower end mutually, be built-in with two semicircular ring (4) with pump shaft (1) groove in lock sleeve (3) step hole, lock sleeve (3) is outer by the lock nut that has been threaded (5), be connected with jackscrew (6) by nut in the radial hole of lock nut (5) lower end, jackscrew (6) the inner is touched stage upper end outside lock nut (5) mutually, and retaining is pulled and is equipped with the spacer (9) that touches mutually with pump shaft (1) on (8) in the spline housing (7).