CN109083831A

CN109083831A - A kind of self-sealing drag reduction anti-seizing oil pump

Info

Publication number: CN109083831A
Application number: CN201810955417.1A
Authority: CN
Inventors: 王素玲; 董康兴; 卢秋羽; 宋微; 陈明站; 李金波
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2018-08-21
Filing date: 2018-08-21
Publication date: 2018-12-25
Anticipated expiration: 2038-08-21
Also published as: CN109083831B

Abstract

The invention relates to a self-sealing drag reduction and anti-seize oil well pump. The self-sealing drag reduction and anti-seize oil well pump is composed of the lower end of the self-lubricating assembly connected to the particle removal structure assembly. The particle removal structure assembly includes a fixed valve, a Granules, guide vanes, sinking chamber, fixed valve is installed in the necking section of the upper end of the grain removal cylinder, wedge-shaped particle outlet is provided at the inclined pipe section of the grain removal cylinder, and the guide vanes are welded to the inner wall of the main body of the grain removal cylinder to guide the flow The main section of the particle removal cylinder at the lower end of the blade is provided with multiple lateral liquid inlets; the self-lubricating structural assembly includes a pump barrel, an upstream floating valve, a downstream floating valve, and a plunger. The upper end of the plunger is connected to the upstream floating valve. The lower end of the plunger is connected with the downstream traveling valve, and the annular gap between the inner wall of the pump cylinder and the plunger forms a liquid storage chamber through the upper sealing ring and the lower sealing ring. The liquid hole communicates with the liquid storage cavity through the lubricating liquid guide hole. The invention can prevent particles very well and at the same time ensure that the wear between the plunger and the pump barrel is reduced.

Description

A kind of self-sealing drag reduction anti-seizing oil pump

Technical field

The present invention relates to oil field well equipment technical fields, and in particular to a kind of self-sealing drag reduction anti-seizing oil pump.

Background technique

Industrially oil well pump is typically mounted on the bottom of down-hole oil tube, and wherein sucker rod pumping is that petroleum industry is traditional One of oil production method, and the artificial lifting way still largely used in petroleum production engineering so far, this pump rely primarily on past in pump barrel The plunger moved again, plunger are then driven by the sucker rod for stretching to ground drive apparatus, and liquid is lifted by oil pipe when down stroke To ground.In oilfield producing well at home and abroad, there is bar oil recovery technique to account for 80% or more, there is the original of bar mechanical oil production system output Oil yield probably accounts for the 75% of total crude output.But as oil field enters the exploitation of middle and later periods, the diversity of flooding method, example Such as poly- ternary of driving is driven, and causes the shaking out of oil well, fouling or wax deposition problem increasingly severe, between pump barrel inner wall and plunger outer wall It generates sand, dirt or wax to enter, pump barrel gap is caused to reduce, pump barrel resistance increases, pump barrel serious wear, or even pump card occurs, leads Pump detection period shortening has been caused, production timeliness is reduced.

United States Patent (USP) 3773441 disclose a kind of " liquid with bailers equipped with sand automatic segregator and lubricating coupler Pump ", has a reservoir compartment among inboard wall of cylinder liner, plunger outer wall and upper-lower seal, and the oil that mainly a part is pumped passes through It crosses filter and enters reservoir compartment, lubricating action is played to the reciprocating motion of plunger, due to being equipped with filter, oil is interior without sand, rock Bits etc. solve the problems, such as frequently to dismount pump.But the main problem of the structure is to pump cost itself and maintenance cost with regard to relatively high Some, because filter needs regularly to replace, and the structure is to use less check valve motion mode at present.The country is open A variety of oil well pump design schemes, such as oil well pump and screw pump combined type development system, small plunger diameter oil well pump, antiscale are taken out Oil pump etc. plays positive effect to solve the working condition of downhole pump, but is directed to oil extraction in oil field middle and later periods, Neng Gouman Sufficient oil well pump frictional resistance is small, and safe and efficient oil well pump of the adaptation containing the particles complexity well liquid condition such as sand, dirt, wax is less, this Invention is to realize oil well pump self-sealing function by introducing new material in the structure basis of conventional pumps, and by cyclonic separation Technology realizes the dynamic filtration to particle in well liquid in conjunction with oil well pump, and solid-liquor separation is effectively solved with self-sealing complex technique Middle and later periods well liquid of certainly recovering the oil is complicated and causes the inadaptability of oil well pump, this has important meaning to Analysis of Oil Well System Efficiency is improved Justice.

Summary of the invention

The object of the present invention is to provide a kind of self-sealing drag reduction anti-seizing oil pump, this self-sealing drag reduction anti-seizing oil pump is used Abrasion or holddown are caused to pump containing particles such as sand, dirt, waxes in well liquid when solving the problems, such as oil pumping pump work in the prior art.

The technical solution adopted by the present invention to solve the technical problems is: this self-sealing drag reduction anti-seizing oil pump by moistening certainly Sliding assembly lower end connection is constituted except micrograined texture assembly, except micrograined texture assembly includes fixed valve, except grain cylinder, guide vane, heavy Grain chamber, fixed valve are installed on except grain cylinder upper end necking segment, wedge-shaped grain export are equipped at pipeline section except grain cylinder tilts, guide vane welding In removing grain cylinder main paragraph inner wall, the grain cylinder main paragraph that removes of guide vane lower end is equipped with multiple lateral inlets, removes grain cylinder lower end Heavy grain chamber is connected by heavy grain chamber connector；Self-lubricating structure assembly includes pump barrel, upward-traveling valves, lower travelling valve, plunger, upper travelling Valve, lower travelling valve are mounted in pump barrel, and upper end is connect with upward-traveling valves, and plunger lower end is connect with lower travelling valve, pump barrel Annular gap between inner wall and plunger forms reservoir compartment by upper sealing ring and lower sealing ring, drills through lubrication on upper traveling valve cage Liquid inlet opening, lubricating fluid inlet opening are connected to by lubricating fluid deflector hole with reservoir compartment.

The material of upper sealing ring and lower sealing ring is C/C composite material in above scheme.

Fixed valve includes standing valve cover, fixed valve ball, standing valve cover connector in above scheme, and standing valve cover is connected by screw thread Standing valve cover connector outer wall is connect, fixed valve ball is sat down naturally at standing valve cover upper end of joint mouth, and fixed valve ball is in standing valve cover Controlled between standing valve cover connector by pressure, standing valve cover connector and except grain cylinder be welded to connect.

It includes upper traveling valve cage, upward-traveling valves ball, upward-traveling valves shield joint, upper traveling valve cage that above scheme middle and upper reaches, which move valve, By screwed connection upward-traveling valves shield joint, upward-traveling valves ball is sat down naturally at upper traveling valve cage upper end of joint mouth, upper travelling Valve ball is controlled between upper traveling valve cage and upward-traveling valves shield joint by pressure, and upward-traveling valves shield joint passes through in screwed connection plunger Wall.

It includes lower travelling valve cover, lower travelling valve ball, lower travelling valve shield joint, lower travelling valve cover that above scheme middle and lower reaches, which move valve, By screwed connection lower travelling valve shield joint, upward-traveling valves ball is sat down naturally at upper traveling valve cage upper end of joint mouth, lower travelling Valve ball is controlled between lower travelling valve cover and lower travelling valve shield joint by pressure, and lower travelling valve shield joint passes through screwed connection plunger bottom Hold inner wall.

Lubricating fluid inlet opening is located at upper traveling valve cage liquid outlet endface in above scheme.

Pump barrel outer wall top passes through screwed connection top connection in above scheme.

The invention has the following advantages:

Oil inlet pipe side of the present invention is equipped with multiple wedge-shaped oil inlets, is equipped with guide vane inside oil inlet pipe, crude oil passes through water conservancy diversion leaf Grain is mutually got rid of at side wall piece under the influence of centrifugal force, is excluded through wedge-shaped grain export, and effectively the grain in crude oil can be discharged Cylinder, while laterally entering the grain in fluid and can fall under gravity into heavy grain chamber, it is not micro- in basic guarantee pump barrel The entrance of grain.It is equipped with a reservoir compartment in the gap of pump barrel and plunger, it is intracavitary to fill lubricating fluid, the up and down motion of plunger is played The effect of lubrication, sealing element avoid particle and enter between plunger and pump barrel, and wherein upper-lower seal ring material is C/C composite wood Material, has the advantages that intensity height, high temperature resistant, coefficient of friction and volume wear are lower.Of the invention removes micrograined texture and oneself Lubrication system can be good at anti-particle while ensure that reduce abrasion between plunger and pump barrel, and it is several to effectively reduce particle holddown Rate extends oil pumping pump operation time.

Detailed description of the invention

Fig. 1 is surface structure schematic diagram of the invention；

Fig. 2 is structural schematic diagram of the invention；

Fig. 3 is reservoir compartment schematic diagram in the present invention；

Fig. 4 is lubricating fluid inlet opening sectional view in the present invention；

Fig. 5 is lubricating fluid deflector hole sectional view in the present invention；

Fig. 6 is wedge-shaped grain export sectional view in the present invention；

Fig. 7 is guide vane in the present invention；

Fig. 8 is lateral inlet sectional view in the present invention.

In figure: 1. top connections, 2. upper traveling valve cages, 3. lubricating fluid inlet openings, 4. upward-traveling valves balls, 5. upper sealing rings, 6. Lubricating fluid conduction hole, 7. upward-traveling valves shield joints, 8. pump barrels, 9. plungers, 10. reservoir compartments, 11. lower travelling valve covers, 12. lower travellings Valve ball, 13. lower travelling valve shield joints, 14. lower sealing rings, 15. connecting tubes, 16. standing valve covers, 17. fixed valve balls, 18. is fixed Valve bonnet joint, 19. wedge-shaped grain exports, 20. guide vanes, 21. remove grain cylinder, and 22. sides are to inlet, 23. heavy chamber connectors, and 24. Heavy grain chamber.

Specific embodiment

The present invention will be further described below with reference to the drawings:

As shown in Fig. 2, this self-sealing drag reduction anti-seizing oil pump removes kernel structure assembly structure by the connection of self-lubricating structure assembly lower end At.By, except particle setting and the lubrication between plunger 9 and pump barrel 8, effectively reducing holddown probability at oil inlet, extending pumping The operation of oil pump time.

As shown in Figure 1, from the appearance point of view, this self-sealing drag reduction anti-seizing oil pump is followed successively by top connection 1, pump from top to bottom Cylinder 8, connecting tube 15 remove grain cylinder 21, heavy grain chamber connector 23, heavy grain chamber 24.Wherein top connection 1 passes through 8 outer wall of screwed connection pump barrel Top, connecting tube 15 is by screwed connection pump barrel 8 and removes grain cylinder 21, and the grain chamber connector 23 that sinks passes through screwed connection in addition to grain cylinder 21 Wall will be connected except grain cylinder 21 and heavy grain chamber 24.

As shown in Fig. 2, except micrograined texture assembly includes fixed valve, except grain cylinder 21, guide vane 20, heavy grain chamber 24, it is fixed Valve is installed on except 21 upper end necking segment of grain cylinder, and standing valve cover 16 passes through 18 outer wall of screwed connection standing valve cover connector, fixed valve ball 17 are controlled between standing valve cover 16 and standing valve cover connector 18 by pressure, and standing valve cover connector 18 is welded in except 21 inner wall of grain cylinder. Wedge-shaped grain export 19 is equipped at pipeline section except grain cylinder 21 tilts, inclination tube wall makes particle be easier to be gathered at side wall, and from wedge shape Grain export 19 is discharged, and sees Fig. 6；Guide vane 20 is welded in except 21 main paragraph inner wall of grain cylinder, wherein guide vane as shown in fig. 7, Refering to Fig. 8,21 main paragraph of grain cylinder that removes of 20 lower end of guide vane is equipped with multiple lateral inlets 22, on lateral inlet 22 Side is equipped with guide vane 20, by fluid grain phase and the generation point of fluid density difference under the influence of centrifugal force of guide vane 20 From heavy phase grain is got rid of at side wall.Except 21 lower end of grain cylinder connects heavy grain chamber 24, lateral inlet 22 by heavy grain chamber connector 23 Under heavy grain chamber 24 is set, heavy grain chamber 24 is located at oil-well pump bottom.Guide vane 20 is equipped with inside oil inlet pipe, crude oil passes through water conservancy diversion Grain is mutually got rid of at side wall blade 20 under the influence of centrifugal force, is excluded through wedge shape outlet, can be effectively by the particle in crude oil Cylinder is discharged, while laterally entering the particle in fluid to fall under gravity into heavy grain chamber 24, basic guarantee pump barrel 8 Do not have fine-grained entrance inside.

In conjunction with shown in Fig. 2, Fig. 3.Self-lubricating structure assembly includes pump barrel 8, upward-traveling valves, lower travelling valve, plunger 9, upstream Dynamic valve, lower travelling valve are mounted in pump barrel 8, and 9 upper end of plunger is connect with upward-traveling valves, and 9 lower end of plunger is connect with lower travelling valve, Annular gap between 8 inner wall of pump barrel and plunger 9 forms the reservoir compartment 10 of sealing by upper sealing ring 5 and lower sealing ring 14.Storage Sap cavity 10 surrounds plunger 9 in a ring, plays a part of lubrication to the up and down motion of plunger 9, sealing element avoids particle entrance Between plunger 9 and pump barrel 8.The material of upper sealing ring and lower sealing ring is C/C composite material.

Upper traveling valve cage 2 is by screwed connection upward-traveling valves shield joint 7, and upward-traveling valves ball 4 is in upper traveling valve cage 2 and upstream It is controlled between dynamic valve bonnet joint 7 by pressure, upward-traveling valves shield joint 7 is existed by 9 inner wall of screwed connection plunger, lubricating fluid inlet opening 3 Two ducts are symmetrically drilled through on upper traveling valve cage 2, lubricating fluid inlet opening 3 is located at upper traveling valve cage liquid outlet endface, as Fig. 4, Shown in Fig. 5, lubricating fluid deflector hole 6 connects lubricating fluid inlet opening 3 and reservoir compartment 10, and lower travelling valve cover 11 passes through screwed connection downstream Dynamic valve bonnet joint 13, lower travelling valve ball 12 are controlled between lower travelling valve cover 11 and lower travelling valve shield joint 13 by pressure, upper travelling Valve bonnet joint 7 passes through 9 bottom end inner wall of screwed connection plunger.

Self-sealing drag reduction anti-seizing oil pump working principle of design of the invention is as follows: by lubricating fluid along lubricating fluid before recovering the oil Inlet opening 3 injects, and lubricating fluid can enter reservoir compartment 10 from lubricating fluid conduction hole 6, in reservoir compartment 10 full of after lubricating fluid, with suitable Plug stifled lubricating fluid inlet opening 3 is blocked.During oil extraction, crude oil enters from side to inlet 22 and removes in grain cylinder 21, partially liq In particle can fall under gravity into heavy grain chamber 24, liquid is taken some particles and is moved upwards by guide vane 20, There is certain tangential velocity by the fluid of guide vane 20, i.e., particle is got rid of at side wall under the influence of centrifugal force, Wedge-shaped grain export 19 at inclination tube wall is discharged, and is flowed up by fixed valve.In upper and lower stroke, self-sealing drag reduction is anti- The manner of execution of card oil well pump upward-traveling valves and lower travelling valve realizes the lifting of crude oil as common oil well pump.

Except micrograined texture assembly can be arranged the particle of the overwhelming majority using gravity and centrifugal force effect in the present invention Out the advantages of；Lubricating fluid can be filled lubricating fluid before pump work of pumping by self-lubricating assembly, guarantee that plunger 9 is upper and lower when work The advantages of abrasion will not be generated when movement between pump barrel 8, wherein upper sealing ring 5 and 14 material of lower sealing ring are C/C composite wood Material, has the advantages that intensity height, high temperature resistant, coefficient of friction and volume wear are lower.

The present invention can anti-particle can be reduced the abrasions of movement parts again.By except grain chamber 24, water conservancy diversion leaf heavy in micrograined texture The effect of piece 20 and wedge-shaped grain export 19, when oil pump being made to pump, liquid, which enters, to be made except grain cylinder 21 is interior using gravity and centrifugation With particle is discharged.It effectively avoids particle by self-lubricating structure to enter between 8 inner wall of 9 outer wall of plunger and pump barrel, simultaneously The abrasion between plunger 9 and pump barrel 8 is prevented, the oil pumping operation time is extended.

Claims

1. A self-sealing drag reduction and anti-seize oil well pump, characterized in that: the self-sealing drag reduction and anti-seize oil well pump is composed of the lower end of the self-lubricating assembly connected to the particle removal structure assembly, and the particle removal structure assembly includes a fixed valve, The grain removal cylinder (21), guide vane (20), grain sinking chamber (24), the fixed valve is installed on the necking section of the upper end of the grain removal cylinder (21), and the inclined pipe section of the grain removal cylinder (21) is equipped with a wedge-shaped grain discharge port (19), guide vanes (20) are welded to the inner wall of the main section of the grain removal cylinder (21), and the main body section of the grain removal cylinder (21) at the lower end of the guide vanes (20) is provided with multiple lateral liquid inlets ( 22), the lower end of the grain removing cylinder (21) is connected to the grain sinking chamber (24) through the grain sinking chamber joint (23); the self-lubricating structure assembly includes the pump barrel (8), the upstream traveling valve, the downstream traveling valve, the plunger ( 9), the upstream floating valve and the downstream floating valve are installed in the pump barrel (8), the upper end of the plunger (9) is connected with the upstream floating valve, the lower end of the plunger (9) is connected with the downstream floating valve, the pump barrel (8) ) The annular gap between the inner wall and the plunger (9) forms a liquid storage chamber (10) through the upper sealing ring (5) and the lower sealing ring (14), and the upper floating valve cover (2) drills the lubricating liquid into the liquid The hole (3), the lubricating fluid inlet hole (3) communicates with the liquid storage chamber (10) through the lubricating fluid drainage hole (6).

2. The self-sealing drag reduction and anti-seize oil well pump according to claim 1, characterized in that: the materials of the upper sealing ring and the lower sealing ring are both C/C composite materials.

3. The self-sealing drag reduction and anti-seize oil pump according to claim 2, characterized in that: the fixed valve includes a fixed valve cover (16), a fixed valve ball (17), a fixed valve cover joint (18), The fixed valve cover (16) is connected to the outer wall of the fixed valve cover joint (18) by threads, the fixed valve ball (17) naturally sits on the upper port of the fixed valve cover joint (18), and the fixed valve ball (17) is on the fixed valve cover (16) and the fixed valve cover joint (18) are controlled by pressure, and the fixed valve cover joint (18) is welded with the grain removing cylinder (21).

4. The self-sealing drag reduction and anti-seize oil well pump according to claim 3, characterized in that: the upstream floating valve includes an upstream floating valve cover (2), an upstream floating valve ball (4), an upstream The movable valve cover joint (7), the upper movable valve cover (2) is connected with the upper movable valve joint (7) through a screw, and the upper movable valve ball (4) naturally sits on the upper movable valve cover joint (7) At the upper port, the upstream floating valve ball (4) is controlled by pressure between the upstream floating valve cover (2) and the upstream floating valve cover joint (7), and the upstream floating valve cover joint (7) is connected to the post by a screw thread Plug (9) inner wall.

5. The self-sealing drag reduction and anti-seize oil well pump according to claim 4, characterized in that: the downstream downstream valve includes a downstream downstream valve cover (11), a downstream downstream valve ball (12), a downstream downstream valve cover joint (13), the downstream floating valve cover (11) is connected to the downstream floating valve cover joint (13) through a screw, and the downstream floating valve ball (12) naturally sits on the upper port of the downstream floating valve cover joint (13), and the downstream floating valve The ball (12) is controlled by pressure between the downstream valve cover (11) and the downstream valve cover connector (13), and the downstream valve cover connector (13) is connected to the bottom inner wall of the plunger (9) by a screw thread.

6. The self-sealing drag reduction and anti-seize oil well pump according to claim 5, characterized in that: the lubricating liquid inlet hole (3) is located at the end surface of the liquid outlet of the upstream floating valve cover.

7. The self-sealing, drag-reducing and anti-seize oil well pump according to claim 6, characterized in that: the top end of the outer wall of the pump cylinder (8) is connected to the upper joint (1) by a screw.