CN110273832A - A kind of piston type drawing liquid pump abrasionproof leak stoppage device - Google Patents

Abstract

The invention relates to an anti-wear and anti-leakage device for a piston-type pumping pump, which is especially suitable for oil pumping wells. Part, wherein, the tube body, the upper connection part, and the lower connection part together constitute the cylinder structure part; the valve cover, the valve seat, the sealing slope, the valve ball guide rail, the valve ball limit plate, the guide tube, the swirl flow The trumpet tube and the built-in spiral groove together form the anti-leakage valve unit; the device of the invention can greatly reduce the wear of the pump, prevent leakage, and prolong the service life of the pump.

Description

Anti-wear and anti-leakage device for piston pump

technical field

The invention relates to the field of liquid lifting, in particular to an anti-wear and anti-leakage device for a piston type liquid suction pump.

Background technique

At present, reciprocating piston pumps are used in the world to lift the liquid with abrasive impurities in deep wells or deep containers, especially in the oil well production process as a typical case, the use of rod piston pumps accounts for the largest proportion of oil production . This kind of rod pump adopts a floating valve inside the piston cylinder, and a fixed valve under the pump cylinder. The pumping unit drives the sucker rod and the piston connected to it to reciprocate up and down, so that the floating valve and the fixed valve are switched alternately without interruption. Lift the fluid in the oil well to the surface. The advantages and disadvantages of the fixed valve and the floating valve of the oil well pump have a great influence on the function, performance and service life of the oil well pump. In the prior art, when the fixed ball valve is closed, etc., due to the abrasive medium such as sand in the oil is pumped into the pump, it adheres to the ball and the sealing surface of the valve seat and causes irregular wear, which will cause the ball to be damaged. The closing time of the sealing seat is lagging behind, and the leakage is large. If the oil well with high viscosity of crude oil is prone to problems such as delayed or lax closing of the valve ball, the oil leakage will be serious, resulting in reduced pump efficiency and reduced production. On the other hand, during the pumping process, the switch of the fixed valve is not synchronized with the up and down strokes of the piston, and there is a certain hysteresis phenomenon, resulting in a certain amount of pump leakage, which also affects the pumping effect of the rod pump, resulting in a decrease in the pump efficiency of the oil well pump and a Oil well inspection cycle is shortened and production is reduced.

Contents of the invention

In order to solve the above-mentioned defects in the prior art, the present invention provides a piston-type liquid suction pump anti-wear and anti-leakage device, which is installed at the bottom of the fixed valve of the reciprocating rod oil pump, effectively solving the problems of the fixed valve in the prior art. Ball and sealing seat wear increased, increased leakage, low pump efficiency, shortened life, etc., and increased oil and gas production and improved production efficiency.

Technical scheme of the present invention is as follows,

An anti-wear and anti-leakage device for a piston-type liquid suction pump, comprising an integrated cylinder structure part composed of a pipe body rigidly connected to an upper connection part and a lower connection part, the upper connection part and the lower connection part Pipe threads are processed on the inner surface of the inner part, and it is characterized in that it consists of a valve cover, a ball seat, a ball ball, a ball guide rail, a sand drop port, an inclined sealing slope, a guide tube, a swirl horn tube and a built-in spiral groove. , together constitute an integrated anti-leakage valve group part; the anti-leakage valve group part is arranged vertically in the inner cavity of the cylinder structure part as a whole, and is rigidly connected to the cylinder through the end of the swirl trumpet tube The inner surface of the body structure part forms an annular grit chamber; the swirl horn tube of the anti-leakage valve group part is close to the lower connection part, and the ball stopper plate of the anti-leakage valve group part is close to the upper connection part The three parts, the cylinder structure part, the anti-leakage valve group part, and the ring-shaped grit chamber are arranged vertically and vertically.

The anti-wear and anti-leakage device of the piston pump is characterized in that the anti-leakage valve group part is vertically installed and arranged in the inner cavity of the cylinder structure part, and the large mouth of the swirl horn tube is close to the The lower connection part of the cylinder structure part is rigidly and sealingly connected with the inner surface of the cylinder structure part, forming the grit chamber in a ring direction.

The top of the valve cover of the anti-leakage valve block is rigidly connected to the ball limiting plate, its inner surface is rigidly connected vertically with at least three ball guide rails, and the inner bottom is rigidly connected to the valve plate. Er seat, the outer bottom of which is rigidly connected to the diversion tube, and the inner bottom of which is provided with at least three sand-out openings arranged obliquely and penetrates through them; the bottom end of the diversion tube is rigidly connected to the small opening of the swirl horn tube The inner surface of the swirl trumpet tube is processed with the spiral groove arranged in a spiral; the valve ball is placed in the cavity formed by the integrated rigid connection of the valve cover, the valve limit plate and the valve seat Inside the body, it can move freely up and down by the limit of the ball guide rail and the ball limit plate; the ball seat is a truncated conical structure with a small top, a large bottom, and a vertical vertical arrangement, and a through hole is set along its axis , the sealing slope is arranged on the top of the through hole of the valve seat, and is integrally processed.

The technical solution of the present invention is also characterized in that the valve seat is a truncated conical structure with a small top, a small bottom and a large vertical arrangement, and the edge of the inner bottom of the mouth of the sand falling port arranged obliquely is connected with the truncated conical arrangement. The conical surface of the seat of Vers is flush.

The ball limiting plate is provided with at least three evenly distributed through holes along the vertical direction.

Embodiments of the present invention and beneficial effects are as follows:

1. With the design device of the above structure, when in use, the upper connection part of the anti-wear and leakage prevention device of the piston pump is connected to the lower end of the pump through threads, and the lower connection part is connected to the oil pipe through threads. During the production process of the oil pumping well, the upstroke pumping unit drives the sucker rod and the piston to move upward, and when the oil is lifted, the floating valve at the top of the oil pump piston is closed, and the fixed valve at the bottom of the oil pump and the piston pump of the present invention Anti-wear and anti-leakage device of the liquid pump Due to the negative pressure formed in the cavity of the oil pump, the rising oil lifts away from the inclined sealing surface on the valve seat (the one-way valve is opened). The clean oil between the valve and the ball of the anti-wear and anti-leakage device of the piston pump is lifted into the pump cavity; The rotation effect is introduced into the cavity composed of the valve seat, the valve cover and the ball limit plate by the rotation of the guide tube and the through hole of the valve seat. The abrasive impurities such as sand are thrown to the peripheral edge due to the centrifugal effect, and The sinking enters the ring-directed sand-settling chamber composed of the cylinder structure part and the leak-proof valve group part, which can effectively reduce the probability of abrasive media such as sand entering the oil well pump and reduce the wear of the valve group.

During the production process of the oil well, when the downstroke pumping unit drives the sucker rod and the piston to move downward, the oil liquid is stopped from lifting, the floating valve on the top of the oil well pump piston is opened, the fixed valve on the bottom of the oil well pump and the piston type of the present invention The valve ball of the anti-wear and leakage prevention device of the pump is closed due to the downward movement of the piston of the oil pump, the positive pressure formed in the cavity of the oil pump and the self-weight of the valve core (general technology). The ball falls back under the double action of its own weight, and fits with the inclined sealing surface on the valve seat (the one-way valve is closed) to seal, and seals the oil in the bottom of the oil well pump. Between, under this working state, the sand and other abrasive media in the oil will sink into the sand chamber composed of the cylinder structure part and the anti-leakage valve group part due to its own gravity, reducing the sand and other abrasive media. The probability of entering the oil well pump reduces the wear and tear of the valve group. At the same time, when the sand in the oil sealed between the fixed valve at the bottom of the oil well pump and the valve ball of the anti-wear and leak-proof device of the piston pump falls on the bottom of the valve seat ring, the sand falling port also falls due to its own weight and self-inclination. It can protect the valve ball and the inclined sealing surface, thus prolonging its service life.

Attached picture

Figure 1: Sectional view of the working state when the ball of the anti-wear and anti-leakage device of the suction pump leaves the inclined sealing surface of the valve seat;

Figure 2: Closed state diagram of the valve ball of the anti-wear and leakage prevention device of the suction pump and the inclined sealing surface of the valve seat;

Figure 3: Sectional view of the cylinder structure of the anti-wear and anti-leakage device of the pump;

Figure 4: Sectional view of the anti-leakage valve group of the anti-wear and anti-leakage device of the pump.

Legend: 1. Cylinder structure part, 2. Leak-proof valve group part, 3. Annular sand settling chamber, 12. Pipe body, 13. Upper connection part, 14. Lower connection part, 21. Valve cover, 22. Valve seat, 23, sealing slope, 24, sand falling port, 25, valve ball, 26, valve ball guide rail, 27, valve ball limit plate, 28, diversion tube, 29, swirl horn tube, 291, spiral groove.

As shown in Figure 1-4: a piston-type liquid suction pump anti-wear and anti-leakage device, including a body (12) rigidly connected to the upper connection part (13), and rigidly connected to the lower connection part (14). The inner surface of the upper connection part (13) and the lower connection part (14) of the chemical cylinder structure part (1) is processed with pipe thread, which is characterized in that it consists of a valve cover (21), a valve seat (22) ), ball balls (25), ball ball guide rails (26), sand drop ports (24), inclined sealing slopes (23), and guide tubes (28), swirl horn tubes (29) and their built-in spiral Grooves (291) together constitute an integrated anti-leakage valve group part (2); the anti-leakage valve group part (2) is vertically arranged in the inner cavity of the cylinder structure part (1) as a whole, through the The end of the swirl trumpet pipe (29) is rigidly connected to the inner surface of the cylinder structure (1) to form an annular grit chamber (3); the swirl horn of the leak-proof valve unit (2) The tube (29) is close to the lower connection part (14), the ball stopper (27) of the anti-leakage valve group part (2) is close to the upper connection part (13), and the cylinder structure part (1), the anti-leakage valve unit (2), and the annular grit chamber (3) have coincident axes and are arranged vertically.

The anti-wear and anti-leakage device of the piston pump is characterized in that the anti-leakage valve group part (2) is vertically installed and arranged in the inner cavity of the cylinder structure part (1), and the swirl flow The large mouth of the trumpet tube (29) is close to the lower connection part (14) of the cylinder structure part (1) and rigidly sealed with the inner surface of the cylinder structure part (1), constituting the grit chamber in a ring direction (3).

The top of the valve cover (21) of the anti-leakage valve block (2) is rigidly connected to the ball limiting plate (27), and its inner surface is vertically rigidly connected with at least three ball guide rails (26), the inner bottom of which is rigidly connected to the valve seat (22), the outer bottom of which is rigidly connected to the draft tube (28), and the inner bottom of which is provided with at least three sand falling ports (24) ) and through; the bottom end of the diversion tube (28) is rigidly connected to the small mouth of the swirl horn tube (29), and the inner surface of the swirl horn tube (29) is processed with the spiral groove arranged in a spiral (291); the valve ball (25) is placed in the cavity formed by the integrated rigid connection of the valve cover (21), the valve limit plate (27) and the valve seat (22), and is subject to The ball guide rail (26) and the ball limiting plate (27) can freely move up and down; the ball seat (22) is a frustum of conical structure with a small top, a large bottom, and a vertical vertical arrangement. A through hole is set on its axis, and the sealing inclined surface (23) is arranged on the top of the through hole of the valve seat (22) for integral processing.

The technical solution of the present invention is also characterized in that the valve seat (22) is a truncated conical structure with a small top and a large bottom vertically arranged, and the inner bottom edge of the mouth of the sand falling port (24) arranged obliquely The conical surface of the Ver seat (22) arranged by the truncated cone is flush.

The ball limiting plate (27) is provided with at least three evenly distributed through holes along the vertical direction.

Embodiments of the present invention and beneficial effects are as follows:

1. With the design device of the above structure, when in use, the upper connection part (13) of the anti-wear and leakage prevention device of the piston pump is connected to the lower end of the pump through threads, and the lower connection part (14) is connected to the oil pipe through threads. During the production process of the oil pumping well, the upstroke pumping unit drives the sucker rod and the piston to move upward, and when the oil is lifted, the floating valve at the top of the oil pump piston is closed, and the fixed valve at the bottom of the oil pump and the piston pump of the present invention The ball (24) of the anti-wear and anti-leakage device of the liquid pump is due to the negative pressure formed in the cavity of the oil well pump, and the rising oil is lifted away from the inclined sealing surface (23) on the valve seat (22) (the one-way valve is opened), On the one hand, the clean oil stored between the fixed valve at the bottom of the oil well pump and the ball (22) of the anti-wear and leak-proof device of the piston type liquid pump is lifted into the oil well pump cavity; on the other hand, from the lower connection part (14 ) The oil sucked in through the spiral groove (291) inside the swirl trumpet (29) produces a rotation effect, and then rotates from the guide tube (28) and the through hole of the valve seat (22) into the valve seat (22), the valve seat (22) In the cavity composed of the Er cover (21) and the Ver ball limit plate (27), sand and other abrasive impurities are thrown to the peripheral edge due to the centrifugal effect, and sink into the cylinder structure part (1) and the leak-proof The annular sand settling chamber (3) formed by the valve group part (2) can effectively reduce the probability of abrasive media such as sand entering the oil well pump and reduce the wear of the valve group.

2. During the production process of the oil well, when the downstroke pumping unit drives the sucker rod and the piston to move downward, the oil liquid is stopped from lifting, the floating valve on the top of the pump piston is opened, the fixed valve at the bottom of the pump and the invention The ball (24) of the anti-wear and anti-leakage device of the piston pump is closed due to the downward movement of the piston of the oil well pump, the formation of positive pressure in the cavity of the oil well pump and the self-weight of the spool (general technology), and at the same time, the pulsating settled oil and this The valve ball (21) of the design device falls back under the double action of its own weight, and fits the inclined sealing surface (23) on the valve seat (22) (the one-way valve is closed) for sealing, and seals the oil at the bottom of the pump to fix the valve Between the anti-wear and anti-leakage device Verball (25) of the piston-type pumping pump, under this working state, abrasive media such as sand in the oil will sink due to its own gravity and enter the cylinder structure (1) and The anti-leakage valve group part (2) is composed of a ring-shaped sand chamber (3), which reduces the probability of abrasive media such as sand entering the oil well pump and reduces the wear of the valve group. At the same time, when the sand in the oil sealed between the fixed valve at the bottom of the oil pump and the ball (25) of the anti-wear and leak-proof device of the piston pump falls on the bottom of the valve seat (22), it will The inclined sand falling port (24) also falls into the sand settling chamber (3), which protects the ball (25) and the inclined sealing surface (23), thereby prolonging its service life.

The invention has reasonable and novel design, simple structure, safety and reliability, convenient installation, repeatable and practical use. Using the anti-wear and anti-leakage device of the piston type liquid suction pump of this design can prevent or reduce sand, wax, scale and other impurities in the formation fluid from adhering to the fixed valve, and effectively prevent or reduce the fixed valve group of the rod reciprocating oil well pump. Due to the phenomenon of oil leakage due to wear and tear seals, the pump efficiency of the oil pump is improved, the pump inspection cycle of the oil well is extended, the cost per ton of oil is reduced, and the production increase effect is achieved. At the same time, the damage caused by downhole operations to the formation is reduced.

Claims (5)

1. a kind of piston type drawing liquid pump abrasionproof leak stoppage device, including by interconnecting piece (13) in tube body (12) rigid connection and rigidly Connect the integrated tube structure portion (1) that lower interconnecting piece (14) collectively form, the upper interconnecting piece (13) and the lower connection Portion (14) inner surface is machined with pipe screw thread, it is characterised in that by valve cover (21), valve seat (22), valve ball (25), valve ball Guide rail (26), sand-falling port (24), sealing inclined-plane (23) and diversion pipe (28), eddy flow oviduct (29) and its built-in helicla flute (291), integrated leakproof valve group portion (2) is collectively formed；The cylinder is integrally vertically laid in by leakproof valve group portion (2) Structural portion (1) inner cavity is rigidly connected in tube structure portion (1) inner surface by eddy flow oviduct (29) end circumferential direction Constitute an annular sand setting chamber (3)；The close lower interconnecting piece (14) of the eddy flow oviduct (29) in leakproof valve group portion (2), The valve ball limit plate (27) in leakproof valve group portion (2) is prevented close to the upper interconnecting piece (13), the tube structure portion (1) It leaks valve group portion (2), annular sand setting chamber (3) three's axis is overlapped and is in vertical vertical runs.

2. a kind of piston type drawing liquid pump abrasionproof leak stoppage device according to claims 1, it is characterised in that the leakproof valve group The vertical vertical installation in portion (2) is laid in tube structure portion (1) inner cavity, and the big oral area of the eddy flow oviduct (29) is close to described It interconnecting piece (14) and is connect with tube structure portion (1) the inner surface rigid seal under tube structure portion (1), circumferential direction constitutes institute State sand setting chamber (3).

3. a kind of piston type drawing liquid pump abrasionproof leak stoppage device according to claims 1, it is characterised in that the leakproof valve group The valve cover (21) top in portion (2) is rigidly connected the valve ball limit plate (27), and inner surface is vertically rigidly connected cloth If at least three valve ball guide rails (26), the inside bottom rigid connection valve seat (22), exterior bottom rigidity It connects the diversion pipe (28), inside bottom opens up the sand-falling port (24) of at least three inclined layings and penetrates through；Institute The small oral area of diversion pipe (28) the bottom end rigid connection eddy flow oviduct (29) is stated, eddy flow oviduct (29) inner surface adds Work has the helicla flute (291) helically laid；The valve ball (25) is placed in by the valve cover (21), valve limit plate (27) it in the cavity connected and composed with valve seat (22) piece rigid, and is limited by the valve ball guide rail (26), valve ball Plate (27) limit can freely up and down play；Circular cone structure of the valve seat (22) in top handle vertical runs vertical greatly, edge Its axis opens up through hole, and the sealing inclined-plane (23) is laid at the top of the valve seat (22) through hole, integration processing.

4. any one piston type drawing liquid pump abrasionproof leak stoppage device according to claims 3, it is characterized in that the valve seat It (22) is in the circular cone structure for pushing up handle vertical runs vertical greatly, bottom edge in sand-falling port (24) of the inclined laying its oral area Edge is concordant with the valve seat (22) conical surface laid in the frustum of a cone.

5. any one piston type drawing liquid pump abrasionproof leak stoppage device according to claims 1 or 3, it is characterized in that the valve Ball limit plate (27) vertically opens up at least three uniformly distributed through holes.