CN106907313A

CN106907313A - Dual channel deep oil well pump

Info

Publication number: CN106907313A
Application number: CN201710231991.8A
Authority: CN
Inventors: 王志华
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-04-11
Filing date: 2017-04-11
Publication date: 2017-06-30

Abstract

The present invention provides a kind of dual channel deep oil well pump, the combination that correlated parts are passed through by the oil well pump of upper and lower two different inner diameters, plunger has been reached in up-down stroke all discharge opeings, realize two feed pathways and two apocenosis passages, can be used in unconventional or bad environments oil producing operations, the yield of oil recovery is not only significantly improved, and extends the service life of oil well pump.

Description

Dual channel deep oil well pump

Technical field

The present invention relates to a kind of downhole hardware for oil pumping in oil fields well operations, and in particular to a kind of dual channel deep oil well pump, Belong to oil recovery technique field.

Background technology

Oil well pump is always the instrument that oil field pumping well oil recovery is most commonly used, although the oil well pump for using at present being capable of base The need for meeting conventional oil well production operation on this, but also there are problems that in some unconventional oil well operations：

(1) pump barrel of conventional oil well pump is directly connected with oil pipe, and in the process of running, the effect of pump barrel inside and outside differential pressure causes Pump barrel deforms, and directly contributes wastage increase, reduces pump efficiency, influences yield；

(2) with the increase of oil well advanced depth, oil well pump is influenceed by underground pressure difference, it is impossible to by taking out for suitable pump footpath Oil pump is lowered into preferable position, and the submergence of pump not enough influences pump efficiency and yield；

(3) in normal pumping process, the up of plunger is influenceed oil well pump with descending by the upper and lower pressure difference of plunger, is run stagnant Afterwards, when up, rod stretch, sucker rod shortens when descending, makes actual stroke not enough, and bar can be also aggravated while influence pump efficiency The abrasion of pipe；

(4) oil pump sleeve is integrally fixed on oil pipe, and pump barrel can be caused to add with plunger wear in gradient oil well Hurry up, reduce oil well pump service life；

(5) in the more sufficient oil well of well liquid, in order to reach operation purpose, under enter big pump diameter oil well pump, cause operation Cost increases, and lower-continuous mapping is reduced；

(6) in multiple zone oil recovery, it is impossible to which the fluid accurately to each oil reservoir is sampled analysis, prison in time and at any time Survey, cause water injection technology to adjust in time, serious meeting is polluted to stratum.

The content of the invention

Not enough for more than, the present invention provides a kind of dual channel deep oil well pump, can be used for unconventional or bad environments oil recoveries In operation, the yield of oil recovery is not only significantly improved, and extend the service life of oil well pump.

The combination that the present invention passes through correlated parts by the oil well pump of upper and lower two different inner diameters, has reached plunger in upper undershoot Journey all discharge opeings, realize two feed pathways and two apocenosis passages, and concrete technical scheme is as follows：

Dual channel deep oil well pump, including sucker rod, outer pipe assembly, pump barrel assembly, assembly for plunger and enter discharge opeing assembly；It is described outer Pipe assembly is sequentially threadedly coupled and is constituted by tubing coupling, short circuit, reducer union, upper exterior tube, outer tube box cupling, lower outer pipe, wherein under The lower end of outer tube is connected with the upper end of bilateral dump valve, and protection and sealing function are played to whole device；The pump barrel assembly by Upper pump barrel, bilateral box cupling and lower pump barrel composition in sequential series, bilateral box cupling are provided with lateral fuel feed hole, wherein the lower end of lower pump barrel It is connected with extension pipe by sub-coupling, the lower end of extension pipe is connected by box cupling under pump with bilateral dump valve, the bilateral row Go out valve and be provided with two passages of oil-feed and lateral oil extraction；The assembly for plunger is connected by hollow upper plug and solid lower plunger Composition, wherein the upper end of upper plug is connected by upper valve bonnet with sucker rod, and the lower end of upper plug is by lower valve bonnet and lateral oil-feed Bilateral box cupling lower contact connection, and lower valve bonnet is built with valve ball/seat；It is described enter discharge opeing assembly include one-way joint, on Standing valve under standing valve, bilateral in inner connection tube, lower inner connection tube, bilateral, the wherein upper end of one-way joint is arranged with above-mentioned bilateral Go out valve connection, the lower end of one-way joint is connected with upper inner connection tube, and the lower end of upper inner connection tube is connected with standing valve in bilateral, double Logical above to be connected by upper outer connecting pipe between standing valve and bidirectional joint, the lower end of bidirectional joint connects with the upper end of lower inner connection tube Connect, the lower end of lower inner connection tube is connected by box cupling on oil pipe with standing valve under bilateral, lower inner connection tube and lower outer connecting pipe it Between form annular clearance, the lower end of standing valve is connected by box cupling under oil pipe with fixation valve union under bilateral, standing valve in bilateral, Valve ball/seat is respectively provided with bilateral in standing valve.

Under the oil pipe lower end of box cupling be sequentially connected with upper packer, inner oil tube, on sand-proof pipe, on sand-preventing hat, can Realize that huge discharge recovers the oil.

The lower end of the fixed valve union has been sequentially connected with lower packet, lower sand-proof pipe, lower sand-preventing hat, and achievable multilayer is adopted Oil.

The inside of the bilateral dump valve is provided with valve ball/seat, the axis of guide and the back-moving spring of anti-dress, for realizing sealing Effect.

The upper end of the upper pump barrel is provided with seal groove, sealing ring is provided with groove, for realizing sealing function.

One end on the upper inner connection tube, lower inner connection tube is respectively equipped with annular groove, is provided with annular groove close Seal, for realizing sealing function.

The outer surface of the extension pipe is equipped with wiper block, plays centralizing function.

Technique effect of the invention：

1st, the inside and outside of pump barrel is each filled with liquid in pumping process, make the differential pressure balancing inside and outside pump barrel, it is to avoid pumping process In pressure difference change be deformed pump barrel caused by wear and tear aggravation reduce service life；

2nd, by discharge opeing under pump, by discharge opeing on pump, two opposite apocenosis passage discharge opeings do not interfere with each other upper pump lower pump, it is to avoid same Liquid during one apocenosis passage discharge opeing drains off to disturb causes pump efficiency to decline, and two apocenosis passages increased the lifting rate of pump, alternative big Bore oil well pump operation；

3rd, it is solid plunger in the descending pump plunger at present of pump, can under the feedback force effect of own wt and upper pump liquid Rapid descending, rod sag when can be prevented effectively from descending, reduces rod tube abrasion；

4th, pump barrel inside and outside differential pressure is balanced, there is outer tube outside pump, and the alternate load of fluid pressure and up-down stroke on pump is main Outer tube is acted on, pump barrel stress very little will not be deformed because pressure is excessive on pump, and the depth of lower pump is deeper than conventional pumps depth, Deep-well oil-extraction can be carried out；

5th, pump barrel has the support of outer tube, and pump barrel has the surplus of floating, using pump barrel bending is not resulted in inclined shaft, rubs Secondary abrasion aggravation is wiped, the pump is also applied for inclined shaft operation；

6th, two packers are installed under pump can realize that multilayer is recovered the oil, because there is two different apocenosis passages, can be to not Accurately monitoring is carried out in real time with the situation of oil reservoir, and timely carries out technique adjustment.

Brief description of the drawings

Fig. 1 is structural representation of the invention (top half).

Fig. 2 is structural representation of the invention (the latter half).

Specific embodiment

A kind of dual channel deep oil well pump as illustrated in fig. 1 and 2, including sucker rod, outer pipe assembly, pump barrel assembly, assembly for plunger With enter discharge opeing assembly.

The outer pipe assembly is suitable by tubing coupling 1, short circuit 2, reducer union 3, upper exterior tube 8, outer tube box cupling 13, lower outer pipe 19 Secondary threaded connection composition, wherein the lower end of lower outer pipe 19 is connected with the upper end of bilateral dump valve 21.

The pump barrel assembly is by upper pump barrel 5, bilateral box cupling 12 and lower pump barrel 14 is in sequential series constitutes, and is set on bilateral box cupling 12 There is lateral fuel feed hole, wherein the lower end of lower pump barrel 14 is threadedly coupled by sub-coupling 16 with extension pipe 17, under extension pipe 17 End is threadedly coupled by box cupling 20 under pump with bilateral dump valve 21, and the bilateral dump valve 21 is provided with oil-feed and lateral oil extraction two Individual passage.

The assembly for plunger is made up of hollow upper plug 7 and the solid connection of lower plunger 15, wherein the upper end of upper plug 7 It is threadedly coupled with sucker rod by upper valve bonnet 6, the lower end of upper plug 7 is by lower valve bonnet 9 and the bilateral box cupling 12 of lateral oil-feed Lower contact is threadedly coupled, and lower valve bonnet 9 is built with valve ball/seat 10.

It is described enter discharge opeing assembly include one-way joint 26, upper inner connection tube 28, standing valve on lower inner connection tube 34, bilateral 29th, standing valve 36 under bilateral, the wherein upper end of one-way joint 26 are threadedly coupled with above-mentioned bilateral dump valve 21, one-way joint 26 Lower end is threadedly coupled with upper inner connection tube 28, and the lower end of upper inner connection tube 28 is threadedly coupled with standing valve in bilateral 29, in bilateral It is threadedly coupled by upper outer connecting pipe 25 between standing valve 29 and bidirectional joint 31, the lower end of bidirectional joint 31 and lower inner connection tube 34 threaded upper ends connection, the lower end of lower inner connection tube 34 is threadedly coupled by box cupling 35 on oil pipe with standing valve under bilateral 36, Annular clearance is formed between lower inner connection tube 34 and lower outer connecting pipe 33, the lower end of standing valve 36 is by box cupling under oil pipe under bilateral 39 are threadedly coupled with fixed valve union 38, be respectively provided with standing valve 36 under standing valve 29, bilateral in bilateral valve ball/seat 32, 37。

Under the oil pipe lower end of box cupling 39 be sequentially connected with upper packer 40, inner oil tube 41, on sand-proof pipe 42, on prevent Husky cap 43.

The lower end of the fixed valve union 38 has been sequentially connected with lower packet 44, lower sand-proof pipe 45, lower sand-preventing hat 46.

The inside of the bilateral dump valve 21 is provided with valve ball/seat 22, the axis of guide 23 and the back-moving spring 24 of anti-dress.

The upper end of the upper pump barrel 5 is provided with seal groove, and sealing ring 4 is provided with groove.

One end on the upper inner connection tube 28, lower inner connection tube 34 is respectively equipped with annular groove, annular groove and installs There is sealing ring 27,50.

The outer surface of the extension pipe 17 is equipped with wiper block 18.

Operation principle：

When plunger is up, standing valve 29 is opened with standing valve under bilateral 36 in bilateral under differential pressure action, lower pump barrel feed liquor Along standing valve 36, lower inner connection tube 34, the inner chamber of upper inner connection tube 28 and standing valve in bilateral under fixed valve union 38, bilateral 29th, the outer tunnel of bilateral dump valve 21 enters in lower pump barrel 14 (lower pump feed liquor is completed).Upper pump barrel feed liquor is along standing valve under bilateral The internal channel of standing valve 29 enters in the annular clearance of 36 side path, lower inner connection tube 34 and lower outer connecting pipe 33, bilateral It is advanced into pump barrel 5 (upper pump feed liquor is completed) in extension pipe 17 and the annular space of outer tube 19 and continuation.

When plunger is descending, standing valve 29 is closed with standing valve under bilateral 36 in bilateral, and solid lower plunger 15 relies on itself Weight and the feedback force of upper pump liquid open bilateral dump valve 21, the liquid in lower pump barrel enters outer tube 19 with casing annulus simultaneously It is arranged in order in the top of upper packer 40 to well head (lower pump discharge opeing is completed).The lower valve bonnet 9 of upper pump is opened simultaneously, and liquid is via upper Plunger 7, the endoporus of upper valve bonnet 6 are discharged to the upper end of upper plug 7, and are arranged in oil pipe (discharge opeing of upper pump is completed), now complete one Pumping process.

Claims

1. dual channel deep oil well pump, it is characterised in that：Including sucker rod, outer pipe assembly, pump barrel assembly, assembly for plunger and to enter discharge opeing total Into；The outer pipe assembly is by tubing coupling (1), short circuit (2), reducer union (3), upper exterior tube (8), outer tube box cupling (13), lower outer Sequentially threaded connection is constituted pipe (19), and wherein the lower end of lower outer pipe (19) is connected with the upper end of bilateral dump valve (21)；The pump Cylinder assembly is by upper pump barrel (5), bilateral box cupling (12) and lower pump barrel (14) is in sequential series constitutes, and bilateral box cupling (12) is provided with laterally Fuel feed hole, wherein the lower end of lower pump barrel (14) is connected by sub-coupling (16) with extension pipe (17), the lower end of extension pipe (17) It is connected with bilateral dump valve (21) by box cupling under pump (20), the bilateral dump valve (21) is provided with oil-feed and lateral oil extraction two Individual passage；The assembly for plunger is made up of hollow upper plug (7) and solid lower plunger (15) connection, wherein upper plug (7) Upper end be connected with sucker rod by upper valve bonnet (6), the bilateral that the lower end of upper plug (7) passes through lower valve bonnet (9) and lateral oil-feed The lower contact connection of box cupling (12), and lower valve bonnet (9) is built with valve ball/seat (10)；It is described enter discharge opeing assembly include unidirectionally connect Standing valve (36) under standing valve (29), bilateral in head (26), upper inner connection tube (28), lower inner connection tube (34), bilateral, wherein singly It is connected with above-mentioned bilateral dump valve (21) to the upper end of joint (26), the lower end of one-way joint (26) is with upper inner connection tube (28) even Connect, the lower end of upper inner connection tube (28) is connected with standing valve in bilateral (29), standing valve (29) and bidirectional joint (31) in bilateral Between connected by upper outer connecting pipe (25), the lower end of bidirectional joint (31) be connected with the upper end of lower inner connection tube (34), lower interior The lower end of connecting tube (34) is connected by box cupling (35) on oil pipe with standing valve under bilateral (36), and lower inner connection tube (34) is outer with lower Connecting tube forms annular clearance between (33), and the lower end of standing valve (36) is connect by box cupling under oil pipe (39) with standing valve under bilateral Head (38) connection, is respectively provided with valve ball/seat (32,37) in standing valve (36) under standing valve (29), bilateral in bilateral.

2. dual channel deep oil well pump as claimed in claim 1, it is characterised in that：The lower end of box cupling (39) is sequentially under the oil pipe It is connected with upper packer (40), inner oil tube (41), upper sand-proof pipe (42), upper sand-preventing hat (43).

3. dual channel deep oil well pump as claimed in claim 1, it is characterised in that：The lower end of the fixed valve union (38) sequentially connects It is connected to lower packet (44), lower sand-proof pipe (45), lower sand-preventing hat (46).

4. dual channel deep oil well pump as claimed in claim 1, it is characterised in that：The inside of the bilateral dump valve (21) is provided with instead Valve ball/the seat (22) of dress, the axis of guide (23) and back-moving spring (24).

5. dual channel deep oil well pump as claimed in claim 1, it is characterised in that：The upper end of the upper pump barrel (5) is provided with seal groove, Sealing ring (4) is installed in groove.

6. dual channel deep oil well pump as claimed in claim 1, it is characterised in that：The upper inner connection tube (28), lower inner connection tube (34) one end on is respectively equipped with annular groove, and sealing ring (27,50) is provided with annular groove.

7. dual channel deep oil well pump as claimed in claim 1, it is characterised in that：The outer surface of the extension pipe (17) is equipped with righting Block (18).