CN2405035Y - Blocking-proof and high-temp. resistance type rod like pump - Google Patents

Abstract

The utility model relates to a blocking-proof and high temperature resistance type rod pump, which is composed of a hydraulic lock, and a piston sealing part. The utility model uses a structure that a metal flexible sealing plunger is used and the hydraulic lock is arranged at a suspended end of a pump, which solves the anti stuck pump problem of the rod pump. The applicable condition is enlarged, and the rod pump can replace a tubing pump, which produces obvious benefits in operation contamination, reduction of oil well operation cost, etc. The utility model has the advantages of reasonable design and simple operation, and is suitable for popularization and application on site.

Description

The high temperature resistant sucker rod pump of clamping-proof type

The utility model relates to the high temperature resistant sucker rod pump of clamping-proof type on the downhole tool that uses on a kind of oilfield, particularly thick oil well.

Do not pass a test on the present encapsulation technique of existing rod-type pumping unit, when sand production, pump is very easily blocked by sand, and drags up and down with sucker rod, loses pumping function.The heat resistance of oil well pump is poor simultaneously, produces the high-temperature machinery distortion again, causes the holddown problem, has improved cost of crude oil production, has reduced working efficiency, has seriously fettered the extensive use of rod-type pumping unit.

The purpose of this utility model is to provide a kind of clamping-proof type high temperature resistant sucker rod pump, and the seat blockade that it can solve rod-type pumping unit effectively reaches the holddown problem that oil well pump chance high temperature generation mechanically deformation, sand production etc. cause surely.

The purpose of this utility model is to realize like this, it is by hydraulic lock, plunger seal is partly formed, hydraulic lock partly comprises suspension (2), hangoff receptacle (3), lock tube (4), ring (5), jump ring (6), stop collar (7), tensioner ring (8), lock ball (9), throw-out collar (10), reset plunger (11), lock core (12), plunger bushing (13), hydraulic cylinder (14), round section joint ring (15), drain cover (16), box cupling (17), plunger seal partly comprises bushing pipe (18), pump barrel (19), rod connector (20), back of the body cap (21), unload sand ring (22), upper prop cock body (23), on the valve ball (24) that moves about, last travelling valve cover (25), travelling valve ball seat (26), seal ring (27), isolating ring (28), lower prop cock body (29), following travelling valve cover (30), under the valve ball (31) that moves about, travelling valve ball seat (32), plug (33), standing valve cover (34), standing valve ball (35), standing valve ball seat (36), lower contact (37), seat sealing-in hoop (38), seat tube sealing (39), seat envelope piston (40) is formed, be connected to lock tube (4) on the hangoff receptacle (3), ring (5), it has tensioner ring (8) down successively, lock ball (9), throw-out collar (10), reset plunger (11), lock core (12), plunger bushing (13), hydraulic cylinder (14), round section joint ring (15), drain cover (16), box cupling (17), below the box cupling (17) successively with bushing pipe (18), seat sealing-in hoop (38), seat tube sealing (39) connects, suspension (2) is arranged in the hangoff receptacle (3), hang under (2) and be connected to stop collar (7) successively, pump barrel (19), standing valve cover (34), lower contact (37), seat envelope piston (40) connects, in pump barrel (19), be followed successively by sucker rod (1) from top to bottom, rod connector (20), back of the body cap (21), unload sand ring (22), upper prop cock body (23), on the valve ball (24) that moves about, last travelling valve cover (25), travelling valve ball seat (26), seal ring (27), isolating ring (28), lower prop cock body (29), following travelling valve cover (30), under the valve ball (31) that moves about, travelling valve ball seat (32), plug (33), standing valve ball (35), standing valve ball seat (36), jump ring (6) is stuck on the stop collar (7), stop collar (7) is gone up fluted, uniform eyelet is gone up in rod connector (20), the appearance of seal ring (27) and pump barrel (19) Elastic Contact are similar to gap-free sealed; The both ends of the surface of seal ring (27) and isolating ring (28) end face contact seal; Isolating ring (28) passes through " O " type circle (16) with the sealing of upper and lower plunger body (23,29) to be realized.

The utility model is owing to adopted the metal soft sealing plunger and in the structure of the suspended end of pump design hydraulic lock, solved the anti-holddown problem of rod-type pumping unit, make its application area, applicable elements is expanded, so that replace tubing pump, will produce obvious benefit at aspects such as operation pollution and reduction oil well operating costs.The utility model is reasonable in design, and is simple to operate, is well suited for field popularization application.

Accompanying drawing is a structural representation of the present utility model.

Below in conjunction with accompanying drawing the utility model is further specified.

The utility model is by hydraulic lock, plunger seal is partly formed, hydraulic lock partly comprises suspension 2, hangoff receptacle 3, lock tube 4, ring 5, jump ring 6, stop collar 7, tensioner ring 8, lock ball 9, throw-out collar 10, reset plunger 11, lock core 12, plunger bushing 13, hydraulic cylinder 14, round section joint ring 15, drain cover 16, box cupling 17, plunger seal partly comprise bushing pipe 18, pump barrel 19, rod connector 20, back of the body cap 21, unload sand ring 22, upper prop cock body 23, on the valve ball 24 that moves about, last travelling valve cover 25, travelling valve ball seat 26, seal ring 27, isolating ring 28, lower prop cock body 29, following travelling valve cover 30, under the valve ball 31 that moves about, travelling valve ball seat 32, plug 33, standing valve cover 34, standing valve ball 35, standing valve ball seat 36, lower contact 37, seat sealing-in hoop 38, seat tube sealing 39, seat envelope piston 40 is formed.

The sealing surfaces of common metal plunger forms by surfacing or chrome-plated process manufacturing, cooperates the sealing of certain clearance Numerical Implementation with pump barrel; The metal soft sealing plunger does not have spray-up, is to realize by a series of seal rings that are installed in the plunger appearance with the sealing of pump barrel 19.The appearance of seal ring 27 and pump barrel 19 Elastic Contact are similar to gap-free sealed; The both ends of the surface of seal ring 29 and isolating ring 30 end face contact seals; The opening wastage of seal ring 27 realizes by " O " type circle 16 by the sealing of the progression of adjusting opened gap and seal ring 27 controlled (according to the principle of hydrodynamics design) isolating ring 30 with upper and lower plunger body 23,29; Just can reach the sealing purpose of metal soft sealing plunger appearance and pump barrel 19 by above structure.

The holddown principle that reasons such as anti-pump barrel distortion of plunger and sand production cause: the contact seal face of metal soft sealing plunger and pump barrel 19, it is the appearance of a series of seal rings 27, all plunger part external diameters except that seal ring 27 can freely pass through the various sand grains that enter in plunger appearance and the pump barrel 19 internal diameter gaps all less than about pump barrel 19 internal diameter 1mm; When pump barrel took place than gross distortion, plunger still can be by carrying out proper functioning simultaneously; Seal ring 27 sectional shapes are square right angle trip rings, have the effect of strike-ofing with pump barrel 19 Elastic Contact, prevent that sand grains from entering in plunger and the pump barrel gap; At upper prop cock body 23 the sediment outflow structure is housed, when plunger is up, the sand grains that falls within the plunger upper part sand grains and adhere on pump barrel 19 inwalls is scraped by seal ring, enter plunger inside by the sand hole that unloads that unloads sand ring 22 and upper prop cock body 23, sand grains is discharged again when treating the descending oil extraction of plunger, prevent that sand grains from entering plunger and pump barrel gap and holddown, realized anti-various holddown purposes by above structure.

The hydraulic lock working principle:

One, the composition of hydraulic lock is made up of part 2--17 spare, and part 3--17 forms lock housing, and when going into the well use, at first the lock housing that part 3--spare 17 is formed is connected the oil pipe foot by part 3;

Two, locking oil well pump process: when pump barrel 19 is transferred by lock housing by sucker rod 1, hang 2 and drive jump ring 6, promote ring 5, tensioner ring 8 moves down, lock ring 9 is pushed in the circular groove of stop collar 7 by tensioner ring 8 thus, and pump is pinned, and hangs 2 simultaneously and is suspended on the hangoff receptacle 3.

Three, oil well pump releasing process: reset plunger 11 is not isometrical plungers, form a Seal cage with plunger bushing 15,13 hydraulic cylinders 14, on hydraulic cylinder 14, there is an aperture to make Seal cage and external communications constant voltage, when needs are given the pump barrel release, in oil pipe, inject liquid from well head, produce certain pressure, at this moment produce certain pressure difference at the two ends of reset plunger 11, reset plunger 11 is moved to throw-out collar 10 directions, promote throw-out collar 10 and tensioner ring 8 and reset.Make lock ball 9 leave stop collar 7, carry sucker rod 1 at this moment and just can drive stop collar 7 and break away from lock housings, realize the release purpose.

Sealed end at pump is designed to insert the seat seal structure, can make pump necessarily move up and down assurance sealing in the scope.In the suspended end design hydraulic lock of pump, to guarantee the steadiness of pump when working, when needs propose pump, in oil pipe, inject earlier liquid, the generation certain pressure is opened hydraulic lock and is got final product.

Design a kind of metal soft sealing plunger, the outer sealing surface diameter of this plunger can produce the resiliently deformable of 0.1--03mm, carries out soft seal with the pump barrel inwall, thereby realizes anti-holddown purpose.

Claims (3)

1, the high temperature resistant sucker rod pump of a kind of clamping-proof type, it is by hydraulic lock, plunger seal is partly formed, hydraulic lock partly comprises suspension (2), hangoff receptacle (3), lock tube (4), ring (5), jump ring (6), stop collar (7), tensioner ring (8), lock ball (9), throw-out collar (10), reset plunger (11), lock core (12), plunger bushing (13), hydraulic cylinder (14), round section joint ring (15), drain cover (16), box cupling (17), plunger seal partly comprises bushing pipe (18), pump barrel (19), rod connector (20), back of the body cap (21), unload sand ring (22), upper prop cock body (23), on the valve ball (24) that moves about, last travelling valve cover (25), travelling valve ball seat (26), seal ring (27), isolating ring (28), lower prop cock body (29), following travelling valve cover (30), under the valve ball (31) that moves about, travelling valve ball seat (32), plug (33), standing valve cover (34), standing valve ball (35), standing valve ball seat (36), lower contact (37), seat sealing-in hoop (38), seat tube sealing (39), seat envelope piston (40) is formed, it is characterized in that: be connected to lock tube (4) on the hangoff receptacle (3), ring (5), it has jump ring (6) down successively, tensioner ring (8), lock ball (9), throw-out collar (10), reset plunger (11), lock core (12), plunger bushing (13), hydraulic cylinder (14), round section joint ring (15), drain cover (16), box cupling (17), below the box cupling (17) successively with bushing pipe (18), seat sealing-in hoop (38), seat tube sealing (39) connects, suspension (2) is arranged in the hangoff receptacle (3), hang under (2) and be connected to stop collar (7) successively, pump barrel (19), standing valve cover (34), lower contact (37), seat envelope piston (40) connects, in pump barrel (19), be followed successively by sucker rod (1) from top to bottom, rod connector (20), back of the body cap (21), unload sand ring (22), upper prop cock body (23), on the valve ball (24) that moves about, last travelling valve cover (25), travelling valve ball seat (26), seal ring (27), isolating ring (28), lower prop cock body (29), following travelling valve cover (30), under the valve ball (31) that moves about, travelling valve ball seat (32), plug (33), standing valve ball (35), standing valve ball seat (36), jump ring (6) is stuck on the stop collar (7), stop collar (7) is gone up fluted, uniform eyelet is gone up in rod connector (20), the appearance of seal ring (27) and pump barrel (19) Elastic Contact are similar to gap-free sealed; The both ends of the surface of seal ring (27) and isolating ring (28) end face contact seal; Isolating ring (28) passes through " O " type circle (16) with the sealing of upper and lower plunger body (23,29) to be realized.

2, the high temperature resistant sucker rod pump of clamping-proof type according to claim 1, it is characterized in that: be appearance and pump barrel (19) Elastic Contact with the sealing of pump barrel (19) in the plunger seal part at seal ring (27), the both ends of the surface of seal ring (27) and isolating ring (28) end face contact seal; " O " type circle (16) is embedded on the isolating ring (28), and all less than about pump barrel (19) internal diameter 1mm, seal ring (27) sectional shape is a square right angle trip ring to all the plunger part external diameters except that seal ring (27), at upper prop cock body (23) sand removing hole is housed.

3, the high temperature resistant sucker rod pump of clamping-proof type according to claim 1 is characterized in that: in the hydraulic lock part:

Reset plunger (11) is not isometrical plunger, on hydraulic cylinder (14) aperture is arranged.