CN202768352U - Drainable gas-tight oil-well pump with long plunger - Google Patents

Abstract

The utility model discloses a drainable gas-tight oil-well pump with a long plunger. The drainable gas-tight oil-well pump with the long plunger comprises an oil outlet valve, a short pipe, an upper joint, an outer cylinder, a first pump cylinder, the long plunger, a middle joint, a connecting pipe, an oil inlet valve, a lower joint and a fixed valve. The drainable gas-tight oil-well pump is characterized in that a bush and a second pump cylinder are arranged inside a cavity of the outer cylinder, the bush is placed between the first pump cylinder and the second pump cylinder, the wall on the middle portion of the bush is provided with a through hole, the wall of the outer cylinder is provided with a through hole which corresponds to the through hole of the bush, and the inner wall of the bush is provided with an axial air discharge duct. According to the drainable gas-tight oil-well pump with the long plunger, anticollision distance is enlarged, pump stuck probability is lowered, the fact that the plunger is stuck by sands is avoided, abrasion is reduced, service life is prolonged, automatic oil drainage can be achieved when a well is repaired, injection of crude oil is avoided, and well repairing work can be better achieved.

Description

But long-plunger draining airlock-resistant oil pump

Technical field

The utility model relates to a kind of improvement of airlock-resistant oil pump, and specifically a kind of both had anti-airway dysfunction, but has again the long-plunger draining airlock-resistant oil pump from oil draining function.

Background technique

At present, employed airlock-resistant oil pump has three kinds in oilfield exploitation, such as strong open-close type airlock-resistant oil pump, the anti-oil pumping of up-set type one-way valve air pump, long-plunger gas prevention pump, long-plunger gas prevention pump pump barrel lower end processing air vent, its structure is comprised of pump barrel, pump barrel box cupling, standing valve assembly, and the plunger part is comprised of strong open/close machinery valve, plunger pull bar, plunger, guiding outlet valve, rod collar.The advantage of this pump is: can more effectively prevent the gas lock phenomenon by the strong keying of mechanical valve, reduce the dry grinding of plunger and pump barrel, increase the service life, its deficiency is: there is not drainage device, therefore, when well workover, crude oil on the pump in the oil pipe can be ejected on the ground, cause environmental pollution, the impact operation has strengthened the difficulty of well workover.

Summary of the invention

The purpose of this utility model is to provide a kind of can prevent gas lock, reduce wear, but again automatically draining, prevent former oil spurts, be convenient to the long-plunger draining airlock-resistant oil pump of well workover.

For reaching above purpose, the technological scheme that the utility model adopts is: but this long-plunger draining airlock-resistant oil pump, comprise outlet valve, short tube, upper connection, urceolus, the first pump barrel, long-plunger, transition joint, connecting tube, oiling valve, lower contact and standing valve, the upper end of urceolus is connected and fixed by screw thread and upper connection, in the chamber of urceolus, be provided with the first pump barrel, be provided with long-plunger in the first pump barrel chamber, the upper end of long-plunger is by the fixing upper outlet valve of short tube, the fixing upper oiling valve in the lower end of long-plunger, the lower end of urceolus is connected with connecting tube by transition joint, the lower end of connecting tube is connected with standing valve by lower contact, it is characterized in that: in the chamber of urceolus, be provided with lining and the second pump barrel, lining is between the first pump barrel and the second pump barrel, the wall at lining middle part is provided with through hole, also be provided with the through hole corresponding with the through hole of lining on the wall of urceolus, be provided with axial air vent at the inwall of lining.

The beneficial effects of the utility model are: compare with the long-plunger airlock-resistant oil pump of present use, strengthened over-stroke, field operation is simple to operate during adjustment, has reduced the holddown probability, can prevent sand card column plug, reduce wear, increase the service life, can when well workover, realize preventing former oil spurts by automatic draining, be beneficial to workover eration, simultaneously, can realize the throughput operation such as positive well-flushing, water filling, gas injection.

Description of drawings

Fig. 1 is that the utility model structure is along the axis cross-sectional schematic;

Among the figure: 1, outlet valve; 2, short tube; 3, upper connection; 4, urceolus; 5, the first pump barrel; 6, long-plunger; 7, lining; 8, transition joint; 9, connecting tube; 10, oiling valve; 11, lower contact; 12, standing valve; 13, through hole; 14, the second pump barrel; 15, air vent.

Embodiment

Make the utility model with reference to accompanying drawing 1.But this long-plunger draining airlock-resistant oil pump, comprise outlet valve 1, short tube 2, upper connection 3, urceolus 4, the first pump barrel 5, long-plunger 6, transition joint 8, connecting tube 9, oiling valve 10, lower contact 11 and standing valve 12, the upper end of urceolus 4 is connected and fixed by screw thread and upper connection 3, in the chamber of urceolus 4, be provided with the first pump barrel 5, the first pump barrel is provided with long-plunger 6 in 5 chambeies, the upper end of long-plunger 6 is by short tube 2 fixing upper outlet valves 1, the fixing upper oiling valve 10 in the lower end of long-plunger 6, the lower end of urceolus 4 is connected with connecting tube 9 by transition joint 8, the lower end of connecting tube 9 is connected with standing valve 12 by lower contact 11, it is characterized in that: in the chamber of urceolus 4, be provided with lining 7 and the second pump barrel 14, lining 7 is between the first pump barrel 5 and the second pump barrel 14, the wall at lining 7 middle parts is provided with through hole 13, also be provided with the through hole corresponding with the through hole 13 of lining 7 on the wall of urceolus 4, be provided with axial air vent 15 at the inwall of lining 7.

When using the utility model, long-plunger 6 rises, and standing valve 12 is opened, and fluid enters in the chamber of lower contact 11 and connecting tube 9 in standing valve 12, when long-plunger 6 descends, standing valve 12 cuts out, and oiling valve 10 and outlet valve 1 are opened, and fluid enters in the tube chamber of long-plunger 6, discharge from outlet valve 1 at last, give rise at last ground, finish an oil pumping process, so repeatedly.When long-plunger 6 is up, the bottom of long-plunger 6 produces negative pressure, when long-plunger 6 process through hole 13, instantaneous being inhaled in the pump chamber of fluid in the sleeve pipe, eliminated negative pressure, because installed lining 7 additional between the first pump barrel 5 and the second pump barrel 14, the inwall of lining 7 is provided with air vent 15, has strengthened adjustable distance; When long-plunger 6 is descending, the increase of the air vent 15 interior gas pressures between through hole 13 and the long-plunger 6, gas is discharged from through hole 13, has increased the oil well pump degree of filling, has improved pump efficiency, also reaches that to adjust operation simple simultaneously, the purpose that success rate is high.

Claims (1)

1. but long-plunger draining airlock-resistant oil pump, comprise outlet valve (1), short tube (2), upper connection (3), urceolus (4), the first pump barrel (5), long-plunger (6), transition joint (8), connecting tube (9), oiling valve (10), lower contact (11) and standing valve (12), the upper end of urceolus (4) is connected and fixed by screw thread and upper connection (3), in the chamber of urceolus (4), be provided with the first pump barrel (5), the first pump barrel (5) is provided with long-plunger (6) in the chamber, the upper end of long-plunger (6) is by the fixing upper outlet valve (1) of short tube (2), the fixing upper oiling valve (10) in the lower end of long-plunger (6), the lower end of urceolus (4) is connected with connecting tube (9) by transition joint (8), the lower end of connecting tube (9) is connected with standing valve (12) by lower contact (11), it is characterized in that: in the chamber of urceolus (4), be provided with lining (7) and the second pump barrel (14), lining (7) is positioned between the first pump barrel (5) and the second pump barrel (14), the wall at lining (7) middle part is provided with through hole (13), also be provided with the through hole corresponding with the through hole (13) of lining (7) on the wall of urceolus (4), be provided with axial air vent (15) at the inwall of lining (7).