CN208203525U - A kind of inner screw driving downhole pumping installation - Google Patents

Abstract

A kind of inner screw driving downhole pumping installation, is related to a kind of pumping unit.It mainly includes inversion type double-action plunger pump, inner screw, commutate block: motor outputting rotary power drives inner screw single direction rotation after retarder slows down, the inner surface of inner screw has two left-right rotary helicla flutes, can automatic reverse, commutation block by roll plus sliding in a manner of move in helicla flute, connecting rod is fixed on commutation block, the unidirectional rotary motion of inner screw is converted into up and down reciprocatingly moving along a straight line, so that crude oil is lifted to ground.The single direction rotation of motor is converted directly into linear reciprocating motion and pumped by the utility model, realize no bar oil pumping, its structure is simple, and the structure of inner screw is particularly suitable for deep-well, slim-hole is recovered the oil, and commutation block rolls plus the kind of drive of sliding improves lifting efficiency.Really realize energy conservation, consumption reduction purpose.

Description

A kind of inner screw driving downhole pumping installation

Technical field

The utility model relates to a kind of pumping unit for oil field, and in particular to commutate to a kind of underground without sucker rod mechanical lift Oil rig.

Background technique

There are mainly three types of oil extraction in oil field modes: Surface power drive driving is recovered the oil, well dynamic driving is recovered the oil, flowing well is adopted Oil.Oil field has largely entered the exploitation middle and later periods at present, and flowing well oil recovery does not adapt to current mining environment.Ground is dynamic It includes pumping unit sucker rod pump and ground driving screw pump that power drive, which is recovered the oil, they belong to sucker rod pumping mode, structure is simple, Manufacture is easy, and is occupied an leading position currently, is accounted for about 90% or so of artificially lifted well's number.But this mode needs when working gram The self weight of sucker rod and the friction working of sucker rod and tube wall are taken, so that energy consumption of electrical machinery is high, low efficiency；It additionally, there may be oil pipe Abrasion, sucker rod be disconnected to be fallen and the problems such as pump detection period is short.Well dynamic driving, which is recovered the oil, is suitable for deep-well, horizontal well, mainly there is electricity Latent pump, screw pump, hydraulic piston pump, jet pump, they eliminate ground machine intermediate transmission component and sucker rod, fundamentally It has solved the problems, such as the abrasion of bar oil recovery rod piece, has achieved the effect that energy-saving consumption-reducing, be the new direction of oilfield exploitation development from now on.

Application No. is 200610009854.1 patents to propose a kind of underground reciprocating oil puming of rotating electric machine driving, Its linear motion for the rotary motion of motor being converted to using rotating electric machine+ball-screw driving form plunger pump, structure Simply, energy-saving effect is good, but its commutation is the positive and negative rotation by motor, and when the jig frequency of plunger is high, motor frequently commutates, and influences The working performance of motor is unfavorable for for a long time in underground work.Application No. is 201110226920.1 patents to propose a kind of nothing It is controllably defeated to be converted to Double-directional rotary using Bidirectional releasing mechanism by the automatic reversing mechanism of bar pumping unit for the one-directional rotation of motor Out, outputting rotary power passes to executing agency, is then converted into linear reciprocating motion by executing agency to realize Pumping action. The utility model solves the problems, such as that motor frequently commutates, and but its structure is complex, and tube and casing in downhole narrow space, part strength is difficult to Guarantee, it is difficult to realize.

Summary of the invention

Current Surface power drive driving oil production method there are aiming at the problem that, power drive oil production method under surge well, this Utility model provides a kind of inner screw driving downhole pumping installation, low to solve pumping unit high energy consumption and efficiency in the prior art Problem.

A kind of inner screw driving downhole pumping installation, it includes station, well head, casing, oil pipe, protection sleeve, double cropping With pump, inner screw, commutate block, connecting rod, guide cylinder, motor, retarder.The inner screw driving downhole pumping installation is mounted on guarantor In pretective sleeve pipe, oil pipe lower end is closely connect with protection bush whorl, and upper end is fixed with inversion type double cropping in the protection sleeve With plunger pump, lower end is equipped with inner screw.The inner screw lower end is connected with retarder and motor by lower contact.Double-acting pump Small plunger is connect by flexible shaft with connecting rod, and connecting rod sleeve has guide cylinder, limits it and circumferentially rotates, and makes its groove along guide cylinder Linear reciprocating motion, connecting rod lower end are threadedly coupled with commutation block, have commutation sliding block on the block that commutates, in the reciprocal spiral shell in the left and right of inner screw It is moved in spin slot.Well head issues electric signal by station, and electric signal is passed to underground submersible motor by cable, drives latent oil Motor single direction rotation communicates rotational motion to inner screw after retarder slows down, and drives commutation block to pump, passes through By connecting rod, flexible shaft finally imparts power to inversion type Double-action reciprocating pump plunger, pumps, completes to adopt Oil movement.

The utility model can drive double-action plunger pump to pump using motor single direction rotation, realize without bar It recovers the oil, structure is simple, and discharge capacity is big, the structure of especially reciprocal inner screw, has not only solved the problems, such as underground narrow space, but also protect The intensity for having demonstrate,proved screw rod is particularly suitable for deep-well, slim-hole is recovered the oil.

Detailed description of the invention

Fig. 1 is inner screw down-hole drive structural schematic diagram.

Fig. 2 is commutation sliding block schematic perspective view.

Fig. 3 is commutation sliding block main view.

Fig. 4 is commutation sliding block right view.

Fig. 5 is inner screw cross-sectional view.

Wherein, 1- station；2- well head；3- oil pipe；4- casing；5- cable；6- protects sleeve；The hole 7-；8- guide cylinder；9- Centralizer；10- bearing；11- connecting rod；12- top connection；13- inner screw；14- lower contact；15- retarder；16- motor；17- is big Pump barrel；18- delivery valve；The hole 19-；20- annular space delivery valve；21- annular space inlet valve；The big plunger of 22-；23- small plunger；The hole 24-； 25- inlet valve；The small pump barrel of 26-；27- flexible shaft；28- commutation block；29- commutation sliding block；30- end cap；31- pin；32- roller bearing； 33- rolling bearing；34- arc shaped slider.

Specific embodiment

It is right with reference to the accompanying drawing in order to keep the purpose of this utility model, technical solution, features and benefits relatively sharp intuitive The utility model is described further.

Referring to Fig. 1, a kind of inner screw driving downhole pumping installation, the device is mounted in protection sleeve 6, protects sleeve spiral shell Line is connected to 3 lower end of oil pipe.Hole 7 is offered on protection sleeve 6, is communicated with the outside world, oil liquid can be from 7 inflow and outflow of hole.

Referring to Fig. 1, a kind of inner screw driving downhole hardware, using inversion type Double-action reciprocating plunger pump, in up-down stroke Oil extraction is all carried out, discharge capacity may be up to twice of single-acting pump, and up-down stroke plunger institute great disparity loaded is relative to inversion type Single-acting pump is small, substantially improves connecting rod stress, reduces energy consumption of electrical machinery.It includes big plunger 22, small plunger 23, big 22 He of plunger Small plunger 23 is an entirety, and reciprocating pump is divided into 26 two annular spaces of big pump barrel 17 and small pump barrel by it.Big pump barrel 17 Interior upper end is equipped with delivery valve 18, and big pump barrel outer lower end is equipped with annular space inlet valve 21, annular space delivery valve 20, and under small pump barrel 26 End opens up hole 19, and the annular space constituted with annular space inlet valve 21, annular space delivery valve 20 communicates.Oil inlet is installed on big plunger 22 Valve 25, be inside small plunger 23 it is hollow, circumferentially offer hole 24, communicated with the hole 7 on protection sleeve 6, oil liquid can be with through hole 24 enter in small plunger 23, enter in big pump barrel 17 via the inlet valve 25 on big plunger 22.23 lower end of small plunger passes through flexibility Axis 27 connects connecting rod 11, and commutation block 28 is equipped on connecting rod 11, and small plunger 23 can move along a straight line with about 28 block of commutation.

The inversion type Double-action reciprocating plunger pump working principle are as follows: when upstroke, small plunger 23 is moved upwards, big pump barrel 17 inner annulus reduce, and pressure increases, and inlet valve 25 is closed, and are enough to overcome fluid column gravity in oil pipe 3 when pressure increases to When, delivery valve 18 is opened, and big pump barrel 17 completes oil extraction movement；At the same time, small 26 inner annulus of pump barrel increases, and pressure subtracts Small, annular space inlet valve 21 is opened, and annular space delivery valve 20 is closed, and oil liquid enters small pump barrel 26, small pump barrel 26 from extraneous through hole 19 Complete oil suction work.It is washed on entire and completes oil extraction work；

When down stroke, small plunger 23 is moved downward, and big 17 inner annulus of pump barrel increases, and pressure reduces, and delivery valve 18 closes It closes, inlet valve 25 is opened, and oil liquid enters in small plunger 23 from the external world via the hole 24 on small plunger 23, then via travelling valve 25 It is flowed into big pump barrel 17, completes oil suction movement；At the same time, small 26 inner annulus of pump barrel reduces, and pressure increases, and annular space goes out Oil valve 20 is opened, and annular space inlet valve 21 is closed, and oily hole 19 and annular space delivery valve 20 from small pump barrel 26 is discharged into oil pipe, is completed Oil extraction work.It is washed under entire and completes oil extraction work.

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the commutation block 28, upper end is threadedly coupled with connecting rod 11, and lower end is equipped with commutation Sliding block 29,11 sets of connecting rod in guide cylinder 8, limiting rod circumferentially rotates, guide its carry out linear reciprocating motion, centralizer 9 protect Card connecting rod axis is overlapped with oil pipe center, and commutation sliding block 29 is enable smoothly to engage with 13 helicla flute of inner screw.The sliding block 29 that commutates is logical It crosses bearing to be mounted in commutation block 28, with 30 fixing bearing of pin 31 and end cap.The commutation sliding block 29 includes roller bearing 32, is rolled Bearing 33, arc shaped slider 34, for rolling bearing 33 directly by interference fit on roller bearing 32, arc shaped slider 34 passes through bearing Be mounted on roller bearing 32, rolling bearing 32 mainly rise transmission effect, using rolling friction be less than sliding friction principle with reduce with Friction between helicla flute；Arc shaped slider 34 mainly play the guiding role, and guarantees that commutation sliding block 29 can pass through left-and-right spiral Slot intersects notch.

Referring to Fig. 1, Fig. 5, the inner screw 13, shape is cylindrical, and inner surface is made of two left-and-right spiral slots, can be with Realize the automatic reverse of motor single direction rotation.13 threaded upper ends of inner screw connect top connection 12, and lower thread connects lower contact 14, interior The upper lower contact of screw rod is fixed on protection sleeve 6 by bearing 10.Lower contact 14 connects retarder 15 and motor 16, motor 16 Single direction rotation drives 13 single direction rotation of inner screw after the deceleration of retarder 15, to make to cooperate the commutation sliding block in helicla flute 29 pump.

The course of work of the provided device of the utility model is as follows:

Station 1 issues electric signal, and electric signal is passed to underground submersible motor 16 by cable 5, drives submersible motor 16 Rotation exports single direction rotation power, after the deceleration of retarder 15, single direction rotation power is passed to inner screw 13, promotes to commutate Sliding block 29 moves in helicla flute, and 8 pairs of commutation blocks 28 of guide cylinder are oriented to, and guarantees that commutation block 28 can only be transported up and down reciprocatingly Dynamic, via connecting rod 11, flexible shaft 27 finally imparts power to inversion type Double-action reciprocating pump plunger 23, carries out up and down reciprocatingly Oil recovery movement is completed in movement.

Claims (3)

1. a kind of inner screw drives downhole pumping installation, which is characterized in that including inversion type Double-action reciprocating plunger pump, interior spiral shell Bar, commutate block, driving motor；The inversion type reciprocating pump is fixed on upper end in protection outer cylinder, and the inner screw is mounted on Lower end in outer cylinder is protected, the commutation block is placed in inner screw；The inversion type Double-action reciprocating double-acting pump, in up-down stroke Oil extraction is carried out, discharge capacity is increased.

2. a kind of inner screw according to claim 1 drives downhole pumping installation, which is characterized in that the inner screw uses Cylinder inner spiral groove structure, the digging of inner screw inner surface have two left-right rotary helicla flutes, can directly commutate.

3. a kind of inner screw according to claim 1 drives downhole pumping installation, which is characterized in that the commutation block includes Roller bearing, arc shaped slider and rolling bearing, rolling bearing directly pass through interference fit on roller bearing, and arc shaped slider passes through bearing On roller bearing, rolling bearing mainly plays transmission effect, using rolling friction be less than sliding friction principle with reduce with helicla flute it Between friction；Arc shaped slider mainly play the guiding role, and guarantees that commutation sliding block can pass through left-and-right spiral slot and intersect notch.