CN200955490Y

CN200955490Y - Efficient bionical-face sealing valve oil pump

Info

Publication number: CN200955490Y
Application number: CN 200620119476
Authority: CN
Inventors: 孙宁武; 韩修廷; 侯德艳; 陈明战; 焦振强; 莫菲; 林铁娟
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2006-09-14
Filing date: 2006-09-14
Publication date: 2007-10-03
Anticipated expiration: 2016-09-14

Abstract

The utility model relates to a high efficiency bionic surface seal valve oil well pump, which is designed to thoroughly solve the down bound of the sucker rod string caused by the friction between the trunk piston and the pump bucket, and a plurality of accidents as solid particular fluid contained during the swabbing period, as well as the short service life. The utility model is composed of a trunk piston and a pump bucket; wherein the center rod sieve tube of the trunk piston is sleeved with a double-layer elastic seal body, while the double elastic body is sleeved with an elastic seal ring. When the trunk piston reciprocates in the pump bucket, the clearance between the trunk piston and the pump bucket can be automatically adjusted to match the surface seal valve, thus reaching the intelligent, highly efficient and self-sealing target; and the seal ring structure is suitable for all hydraulic trunk pistons or multi-trunk piston pumps with the functions as reducing the flight, and promoting the volumetric efficiency of the pump to solve the polymer flooding filling, heavy oil and sand output, as well as reduction of deflection friction of the rod pipe in the fouling oil pumping unit well. Thus the utility model has the advantages of the stroke loss reduction, accidental rate reduction, and pump service life extension as well as pumping efficiency promotion.

Description

Highly effective bionic surface sealing valve oil-well pump

Technical field:

The utility model belongs to petroleum production machinery lifting field, is mainly used in underground crude oil, contains polymer, the mechanical lifting of aqueous fluid, three-component compound system.

Background technique:

At present, there is the contradiction of two aspects in existing mechanical oil pumping plunger pump (referring to Fig. 2) because of the friction between plunger 2 and the pump barrel 1 in the work running both at home and abroad.The one, the gap design of plunger 2 and pump barrel 1 hour, when sucker rod 4 was descending, the frictional force between plunger 2 and the pump barrel 1 was big, has increased energy consumption; Simultaneously, sucker rod 4 is bent and rub, cause sucker rod to rub or the oil pipe mill leaks, shortened pump detection period, increased the crude oil development cost with oil pipe 5.This phenomenon viscous crude, contain in the viscous fluid lifting processes such as polymer fluid more obvious.The 2nd, when the gap design of plunger 2 and pump barrel 1 was big, when sucker rod 4 was descending, the frictional force between plunger 2 and the pump barrel 1 was little, can not cause sucker rod to rub or the leakage of oil pipe mill, and pump detection period is long.But when sucker rod 4 was up, plunger 2 was big with the gap of pump barrel 1, and the pump barrel inner fluid runs off serious, and mechanical pumping efficiency is low, has equally also increased the crude oil development cost.

Plunger travelling valve ball is nonflexible line sealing (Fig. 3 A) with seat.Potted line concentrated wear or because of solid phase particles adheres to, influence has sealed sealing effect, has increased the hydraulic slip amount, and pump efficiency reduces.In addition, because of valve ball and seat in plunger cavity, make too little that plunger can not make, limited present plunger pump and only can not satisfy the lifting needs of low production capacity well at Φ 28mm.

The model utility content:

The utility model purpose is to overcome existing defective, and a kind of new and effective bionic surface sealing valve oil-well pump is provided.

The highly effective bionic surface sealing valve oil-well pump that the utility model provides, it is made up of plunger, pump barrel, two elastomer valve, plunger and pump barrel Spielpassung, wherein: described plunger by the center-pole screen casing, be enclosed within the outer two elastic sealed bodies of described center-pole screen casing, be enclosed within the described pair of external wear-resisting reducing seal ring of elastic packing and form.

Above-mentioned highly effective bionic surface sealing valve oil-well pump, the plunger switch valve has adopted the bionic surface sealing principle.Has a gap between the described pair of elastic sealed body.Plunger and pump barrel gap, double-deck elastic sealed body gap length are according to lift-off pressures and fluid viscosity adjustment.

Above-mentioned highly effective bionic surface sealing valve oil-well pump, described wear-resisting reducing seal ring are that spacer sleeve is at elastic packing external a plurality of rigid metal rings and a plurality of elastic ring.

Above-mentioned highly effective bionic surface sealing valve oil-well pump, the wear-resisting reducing seal ring two ends that described metal ring and elastic ring form are pushed down with pressure cap.

Above-mentioned highly effective bionic surface sealing valve oil-well pump, a plurality of elastic rings in every interval are placed a metal ring.

Adopt above scheme, the utility model has solved above-mentioned machinery oil pumping plunger pump in the work running, because of fricative two aspect contradictions between plunger and the pump barrel.And make full use of this two aspects contradiction, and the gap of plunger and pump barrel is increased, reduced the friction of plunger and pump barrel; In the up process of sucker rod the spacing of plunger and pump barrel is reduced, reduced the fluid loss, realized the face seal of plunger valve.Travelling valve is replaced by face seal on the plunger, reduces the influence (Fig. 3 B) that the solid phase particle pump is taken out effect.

Description of drawings:

Fig. 1 is the utility model structure diagram;

Fig. 1-A is plunger and a pump barrel structure partial enlarged view among Fig. 1;

Fig. 2 is existing conventional plunger pump structure sketch;

Fig. 2-A is plunger and a pump barrel structure partial enlarged view among Fig. 2;

Fig. 3 A is nonflexible line sealing state figure for the valve ball that moves about in the existing conventional plunger pump with seat;

Fig. 3 B is the utility model oil well pump center pillar travelling valve face seal beyond the Great Wall phase diagram.

Embodiment:

Referring to Fig. 1 and Figure 1A, highly effective bionic surface sealing valve oil-well pump of the present utility model is made up of pump barrel 1, plunger 2, standing valve 3, plunger 2 and pump barrel 1 Spielpassung; Referring to Figure 1A, plunger 2 is made up of withstand voltage and wear-resisting reducing seal ring 5, inside and outside elastic sealed

body

6,7 and center-pole screen casing 8; The two-layer elastic sealed

body

6,7 of cover overlaps a plurality of elastic rings 5 again on center-pole screen casing 8 cylindricals outside elastic sealed body 6, and two ends are pushed down with pressure cap 4.Thus, elastic ring 5 has formed the outer surface of plunger 2, and the gap of itself and pump barrel 1 forms sealing surface, referring to Fig. 3 B, and matching gap δ, the big I of δ is determined according to the factors such as concentration of contained polymer in institute's drawing liquid body.

In the highly effective bionic surface sealing valve oil-well pump work of the present utility model, the travelling valve of the former oil well pump of action substitution of inside and outside

elastomer

6,7 is realized the high pressure surface sealing.When the sucker rod stay column is gone beyond the Great Wall, high pressure is born in inside, plunger 2 chamber, plunger 2 chamber inside and outside differential pressures increase, interior elastic sealed body 7 rises under the high pressure effect greatly, affacts on the outer elastomer 6, affacts on the wear-resisting elastic ring 5 again, elastic ring 5 and pump barrel 1 gap smaller, the reinforced seal effect reduces fluid leakage, has improved the volumetric efficiency and the mechanical efficiency of pump; When sucker rod band plunger was descending, plunger 2 chamber external and internal pressures were identical, and inside and

outside elastomer

6,7 and wear-resisting elastic ring 5 shrink and end reset condition, the gap of increase and pump barrel 1, the descending resistance of minimizing plunger 2 is opened the passage between the inside and

outside elastomer

6 and 7, reduce rod sag, improve pump efficiency.The gap delta size of plunger and pump barrel is according to parameters such as polymer concentration, viscosity of crude, water content and sand content in institute's drawing liquid body and decide, when these content of material are high, the gap delta value increases, otherwise then reduces the δ value, and general δ value changes between 0.2～0.5mm.

Core Feature of the present utility model is a plunger when moving reciprocatingly in pump barrel, and plunger and pump barrel gap can be adjusted automatically, and be supporting with the face seal valve, reaches intelligent, efficient, self-styled purpose.When plunger was up, the plunger cavity internal pressure increased, and passed on the elastic sealing ring by elastic sealed body, and elastic ring swells, and plunger and pump barrel gap reduce simultaneously, and the leakage of plunger cavity inner fluid reduces, and reaches the effect of sealing, improves pump efficiency.When plunger was descending, the plunger cavity external and internal pressure was identical, and elastic ring shrinks, and plunger and pump barrel gap enlargement reduce descending frictional force, reduced energy consumption; Prevent that rod sag from producing that bar is disconnected, phenomenons such as the descending difficulty of bar and pipe leakages, prolong pump detection period, reduction oil field development cost.Because two elastomeric seals belong to face seal, local damage is unaffected; When particularly entering the small amount of solid particle in the sealing surface, do not influence integral sealing effect yet.Three-component compound system is played anti-scaling action, and plunger upper end accelerating fluid effluxes, and reduces the chance of dirt and deposition of solid.

The technical scheme of the two elastomers that the utility model proposes and the wear-resisting reducing sealing ring of cooperation realizes wear-resisting, close Envelope is separated, applicable to all hydraulic self-sealing plunger pump and multiple plunger displacement pump. Hydraulic plunger behind the adding sealing ring is taken out The You pump just has self-sealing function, and the high-pressure side sealing function reduces the oil pumping accident rate, has reduced the pump leakage amount, carries The high volumetric efficiency of pump, have polymer flooding, the viscous crude of solution, shake out, fouling rod-pumped well Zhong rod and tube partial-wear, Reduce the You point of loss of plunger stroke, raising pump efficiency.

Claims

1, highly effective bionic surface sealing valve oil-well pump, it is made up of plunger, pump barrel, two elastomer valve, plunger and pump barrel Spielpassung is characterized in that: described plunger by the center-pole screen casing, be enclosed within the outer two elastic sealed bodies of described center-pole screen casing, be enclosed within the described pair of external wear-resisting reducing seal ring of elastic packing and form.

2, according to the described highly effective bionic surface sealing valve oil-well pump of claim 1, it is characterized in that having a gap between the described pair of elastic sealed body.

3, according to claim 1 or 2 described highly effective bionic surface sealing valve oil-well pumps, its characteristics are, the described pair of elastic sealed body and center-pole screen casing are face and contact and form face seal.

4, according to claim 1 or 2 described highly effective bionic surface sealing valve oil-well pumps, its characteristics are that described wear-resisting reducing seal ring is that spacer sleeve is at elastic packing external a plurality of rigid metal rings and a plurality of elastic ring.

5, according to the described highly effective bionic surface sealing valve oil-well pump of claim 4, its characteristics are that the wear-resisting reducing seal ring two ends that described metal ring and elastic ring form are pushed down with pressure cap.

6, according to the described highly effective bionic surface sealing valve oil-well pump of claim 4, its characteristics are that a plurality of elastic rings in every interval are placed a metal ring.

7, according to the described highly effective bionic surface sealing valve oil-well pump of claim 3, its characteristics are that described wear-resisting reducing seal ring is that spacer sleeve is at elastic packing external a plurality of rigid metal rings and a plurality of elastic ring.

8, according to the described highly effective bionic surface sealing valve oil-well pump of claim 7, its characteristics are that the wear-resisting reducing seal ring two ends that described metal ring and elastic ring form are pushed down with pressure cap.

9, according to the described highly effective bionic surface sealing valve oil-well pump of claim 7, its characteristics are that a plurality of elastic rings in every interval are placed a metal ring.