CN110485970B - Exhaust sand prevention device for oil well pump - Google Patents
Exhaust sand prevention device for oil well pump Download PDFInfo
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- CN110485970B CN110485970B CN201910882991.3A CN201910882991A CN110485970B CN 110485970 B CN110485970 B CN 110485970B CN 201910882991 A CN201910882991 A CN 201910882991A CN 110485970 B CN110485970 B CN 110485970B
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- sand setting
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- 239000004576 sand Substances 0.000 title claims abstract description 180
- 239000003129 oil well Substances 0.000 title claims abstract description 28
- 230000002265 prevention Effects 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 230000005484 gravity Effects 0.000 claims abstract description 24
- 238000000926 separation method Methods 0.000 claims description 35
- 230000000694 effects Effects 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 52
- 239000012071 phase Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to an exhaust sand prevention device for an oil well pump, which comprises a plunger, a pump cylinder, a joint, a fixed valve assembly, an exhaust gas separator and a sand prevention structure assembly, wherein the plunger is arranged in the pump cylinder, a traveling valve ball is arranged in a plunger valve ball seat, the lower end of the pump cylinder is connected with a liquid outlet at the upper end of the fixed valve assembly, and a liquid inlet below the fixed valve assembly is provided with the sand prevention structure assembly; the fixed valve assembly comprises an oil outlet shell, a fixed valve lower connector, a fixed valve ball and an oil outlet valve cover, wherein the fixed valve lower connector is arranged at the lower port of the oil outlet shell, the oil outlet valve cover is buckled on the fixed valve lower connector, the fixed valve lower connector is communicated with the oil outlet valve cover through an oil outlet valve guide hole, the fixed valve ball is arranged at the oil outlet valve guide hole, the oil outlet shell is divided into a left half part and a right half part, and the exhaust gas separator is hoisted on the right half part; the sand control structure assembly comprises a gravity settling cylinder and a centrifugal sand setting device. The invention can obviously reduce the phenomena of sand blocking, air locking and the like which often occur in the pump.
Description
The technical field is as follows:
the invention relates to the field of oil extraction engineering devices in oil fields, in particular to an exhaust sand prevention device for an oil well pump.
Background art:
with the deepening of oil field exploitation, part of oil fields in China have entered three high stages of high water content, sand content and gas content, so that the problems of the traditional oil well pump in the use process are exposed, the structure is simple, and the oil well pump is only suitable for pumping liquid fluid without impurities and a small amount of gas and is not suitable for the coexistence of gas-solid-liquid three phases or even multiple phases. In contrast, it is necessary to research an exhaust sand prevention device suitable for high solid ratio and high gas ratio when the oil well pump is in operation.
Taking the plunger oil-well pump which is an important facility for oil field exploitation as an example, sliding friction often exists between a pump barrel and a plunger during operation, sand phase rich in crude oil and solid phase such as sundries in an oil well, such as sand phase and sundries during operation and swabbing into the pump barrel during oil pumping, can cause serious eccentric wear of the plunger for a long time, and once the eccentric wear occurs, on one hand, the surface and local abrasion of the plunger can be damaged, on the other hand, local hot gluing can be caused, and the service life of the oil-well pump is greatly shortened. When the gas phase exists, the pressure in the traditional plunger oil well pump can be changed, and the volume of the gas in the pump can be changed in the processes of suction and discharge. During the upstroke, as the pressure in the pump is reduced, the condensate gas and the dissolved gas in the liquid can be separated from the liquid, and the original free gas expands to influence the suction process of the plunger pump; on the downstroke, the space in the pump is reduced, the pressure is increased, and part of condensate gas and solution gas can be dissolved in liquid again, so that the opening and closing of the floating valve and the fixed valve are influenced. The long-term reciprocating work can cause the air lock phenomenon in serious cases, which causes the reduction of the pump efficiency.
The invention content is as follows:
the invention aims to provide an exhaust sand prevention device for an oil well pump, which is used for solving the problems of sand blocking, air locking and the like commonly existing in the operation process of the oil well pump at present, so that the oil pumping efficiency and the service life of the oil well pump are reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: the exhaust sand prevention device for the oil well pump comprises a plunger, a pump cylinder, a joint, a fixed valve assembly, an exhaust gas separator and a sand prevention structure assembly, wherein the plunger is arranged in the pump cylinder, a traveling valve ball is arranged in a plunger valve ball seat, the lower end of the pump cylinder is connected with a liquid outlet at the upper end of the fixed valve assembly, and the sand prevention structure assembly is arranged at a liquid inlet below the fixed valve assembly;
the fixed valve assembly comprises an oil outlet shell, a fixed valve lower connector, a fixed valve ball and an oil outlet valve cover, wherein the fixed valve lower connector is arranged at the lower port of the oil outlet shell, the oil outlet valve cover is buckled on the fixed valve lower connector, the fixed valve lower connector is communicated with the oil outlet valve cover through an oil outlet valve guide hole, the fixed valve ball is arranged at the oil outlet valve guide hole, the oil outlet shell is divided into a left half part and a right half part, the bottom of the left half part and the bottom of the right half part are sealed by the oil outlet valve cover, the oil outlet valve cover is communicated with the right half part through the oil outlet valve guide hole, the right half part is provided with a sealing cover, the gas discharge separator is hung on the right half part, the outlet of the gas discharge separator is communicated with a shaft, and the left half part is communicated with the right half part through the oil outlet hole; the cavity formed by the exhaust separator and the right half part is an exhaust cavity, the exhaust separator is a revolving body formed by a spiral separation blade, an exhaust conical section and an exhaust tail pipe section from bottom to top, and the exhaust conical section and the exhaust tail pipe section are uniformly provided with air outlet holes along the circumferential direction;
the sand control structure assembly comprises a gravity settling cylinder and a centrifugal sand setting device, the gravity settling cylinder is a cylinder body with a closed lower end and is provided with an annular sand setting cavity and a centrifugal sand setting cavity, the annular sand setting cavity is wrapped outside the centrifugal sand setting cavity and is communicated with the centrifugal sand setting cavity, the centrifugal sand setting device is arranged in the centrifugal sand setting cavity, and an inlet disc is arranged on the upper portion of the gravity settling cylinder.
The centrifugal sand settling device in the scheme is an open cylinder body integrally formed by a straight cylinder section and an expanding section, the expanding section is positioned below the straight cylinder section, the upper part of the expanding section is uniformly provided with sand settling device tangential sand outlets, the inner wall of the expanding section is provided with centrifugal separation blades at intervals in a staggered manner, and each centrifugal separation blade is uniformly provided with a blade exhaust hole.
The shape of the exhaust cavity in the scheme is similar to that of an inverted exhaust separator, and the gas phase of the light phase is collected near the exhaust tail pipe section and the exhaust cone section under the rotational flow action of the spiral separation blades, so that the exhaust cavity is further beneficial to the collection of the gas phase at the exhaust tail pipe section and the exhaust cone section, and the gas is exhausted out of the pump barrel through the exhaust tail pipe section air outlet and the exhaust cone section air outlet, and the high-efficiency work of the pump is facilitated.
In the scheme, the annular sand setting cavity consists of a sand setting I-level cavity and a sand setting II-level cavity, wherein the region between the incoming liquid inlet disc and the sand setting I-level inlet forms the sand setting I-level cavity, the region between the sand setting I-level inlet and the sand setting II-level inlet forms the sand setting II-level cavity, and the sand setting I-level cavity 13I and the sand setting II-level cavity 13II jointly form an effective sand setting space of the gravity settling cylinder; the upper end of the second-stage sand setting cylinder is provided with a seepage hole, an annular region between the seepage hole and the centrifugal sand setting device forms a centrifugal sand setting cavity, and the centrifugal sand setting cavity is an effective sand setting space of the centrifugal sand setting device. The gravity sand setting space and the centrifugal sand setting space jointly form a sand control structure assembly.
According to the scheme, the plunger is pushed by the oil pumping motor to do reciprocating motion in the pump cylinder, during an upstroke, the fixed valve ball is opened, produced liquid passes through the gravity sand settling I-stage cavity and the sand settling II-stage cavity to play a preliminary sand prevention role based on the gravity of sand phases, produced liquid containing a relatively small amount of sand phases passes through the centrifugal sand settling device to play a further sand prevention effect, produced liquid from the centrifugal sand settling device contains a large amount of condensate gas and dissolved gas, the condensate gas and the dissolved gas are discharged into a shaft through the cyclone separation effect of the gas discharge separator, and liquid enters the pump cylinder; during the down stroke, the fixed valve ball is closed, the pump barrel extrudes liquid and gas to enter the exhaust cavity, and a small amount of gas in the pump cavity is discharged under the cyclone separation action of the exhaust separator; the reciprocating circulation makes the plunger oil pump play the purpose of exhausting and preventing sand, thereby improving the pump efficiency and prolonging the service life of the pump.
The invention has the following beneficial effects:
1. the invention ensures that the oil well pump can effectively prevent sand and play a key role in exhausting in the working process, and can obviously reduce the phenomena of sand blocking, air locking and the like which often occur in the pump.
2. The invention provides an exhaust sand prevention device for an oil well pump, which aims to solve the technical problem encountered in the current oil field exploitation stage.
3. According to the invention, the exhaust structure assembly is arranged below the pump cylinder, and the sand control structure assembly based on a gravity and centrifugal separation combined form is arranged at the liquid inlet below the fixed valve assembly, so that the effective sand control effect is achieved, the exhaust effect is achieved, and the sand blocking problem caused by sand phase accumulation and the air lock problem caused by gas phase accumulation which frequently occur in the working process of the pump are reduced.
Fourthly, explanation of the attached drawings:
fig. 1 is a schematic structural diagram of an exhaust sand control device for an oil well pump according to the present invention.
Fig. 2 is a partially enlarged schematic view of a centrifugal sand settler in an exhaust sand control device for an oil well pump according to the present invention.
Fig. 3 is a schematic structural diagram of an exhaust separator in the exhaust sand prevention device for the oil well pump according to the present invention.
In the drawing 1, a sucker rod 1, a plunger 2, a plunger 3, a pump barrel 4, a traveling valve ball 5, an exhaust gas separator 5-1, an exhaust tail pipe section 5-2, an exhaust conical section 5-3, a spiral separation blade 5a, an exhaust tail pipe section air outlet 5b, an exhaust conical section air outlet 5I, an exhaust cavity 6, an oil outlet valve cover 6a, an oil outlet valve guide hole 7, a fixed valve ball 8, a fixed valve lower joint 9, an oil outlet shell 9a, an oil outlet 10, a centrifugal sand settling device 10I, a centrifugal sand settling cavity 11, a sand settling device tangential sand outlet 12, a centrifugal separation blade 12a, a centrifugal separation blade exhaust hole 13, a gravity settling barrel 13a, an inflow inlet disc 13c, a sand settling I-level inlet 13d, a sand settling II-level inlet 13I, a sand settling I-level cavity 13II, a sand settling II-level cavity 14 and a shaft.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in figure 1, the exhaust sand prevention device for the oil well pump comprises a plunger 2, a pump barrel 3, a joint, a fixed valve assembly, an exhaust gas separator 5 and a sand prevention structure assembly, wherein a traveling valve ball 4 is arranged in a plunger valve ball seat, the plunger 2 is arranged in the pump barrel 3, the lower end of the pump barrel 3 is connected with the upper port of the pump cavity of the left half part of the oil outlet shell, and the sand prevention structure assembly is arranged at a liquid inlet below the fixed valve assembly.
The standing valve assembly includes the casing 9 that produces oil, standing valve lower clutch 8, standing valve ball 7, the valve bonnet 6 that produces oil, and standing valve lower clutch 8 sets up in the port under the casing 9 that produces oil, and 6 lower extremes of the valve bonnet that produces oil are connected with standing valve lower clutch 8, and 6 buckles of the valve bonnet that produces oil are on standing valve lower clutch 8, and the casing 9 that produces oil is connected with standing valve lower clutch 8 and the valve bonnet 6 that produces oil again. The fixed valve lower joint 8 is communicated with the oil outlet valve cover 6 through an oil outlet valve guide hole 6a, the oil outlet valve cover guide hole 6a is convenient for controlling produced liquid to firstly enter an exhaust separation cavity, the fixed valve ball 7 is arranged on the oil outlet valve cover 6 and is positioned at the oil outlet valve guide hole 6a, the oil outlet shell 9 is divided into a left half part and a right half part, the bottom of the left half part and the bottom of the right half part are sealed by the oil outlet valve cover 6, and the oil outlet valve cover 6 is communicated with the right half part through the oil outlet valve guide hole 6a.
The lower end of the pump cylinder 3 is mounted with the left half part of the oil outlet shell 9, the right half part of the oil outlet shell 9 is provided with a sealing cover, the gas exhaust separator 5 is connected with the right half part of the oil outlet shell 9 through threaded screwing, a tail pipe section 5-1 at the upper end of the gas exhaust separator 5 and the periphery of the surface of a gas exhaust conical section 5-2 are drilled to form a gas exhaust tail pipe section gas outlet hole 5ba and a gas exhaust conical section gas outlet hole 5b, and the lower end of the gas exhaust separator 5 is distributed with spiral separation blades 5-3. The outlet of the exhaust gas separator 5 is communicated with the shaft 14, and the left half part and the right half part are communicated through an oil outlet 9 a; the cavity formed by the exhaust gas separator 5 and the right half part is an exhaust cavity 5I, the exhaust gas separator 5 is a revolving body formed by a spiral separation blade 5-3, an exhaust conical section 5-2 and an exhaust tail pipe section 5-1 from bottom to top, and air outlet holes are uniformly distributed on the exhaust conical section 5-2 and the exhaust tail pipe section 5-1 along the circumferential direction. The whole exhaust gas separator 5 is formed by connecting reducing circular pipes by taking advantage of the structural form of a Laval nozzle, and the right half part of the oil outlet shell 9 is isolated into a space with the same shape as the inverted exhaust gas separator 5, namely an exhaust cavity 5I by the exhaust gas separator 5; the gas phase of the light phase is gathered near the tail pipe section 5-1 and the taper section 5-2 of the exhaust by the rotational flow of the spiral separation blade 5-3, the gas cavities 5I with the two inverted sides are further beneficial to gathering the gas phase at the tail pipe section and the taper section, so that the gas is discharged out of the pump barrel through the gas outlet holes 5a and 5b of the tail pipe section, and the high-efficiency work of the pump is facilitated.
The sand control structure assembly comprises a gravity settling cylinder 13 and a centrifugal sand setting device 10, wherein the gravity settling cylinder 13 is a cylinder body with a closed lower end and is provided with an annular sand setting cavity and a centrifugal sand setting cavity 10I, the annular sand setting cavity is wrapped outside the centrifugal sand setting cavity 10I and is communicated with the centrifugal sand setting cavity, the centrifugal sand setting device 10 is arranged in the centrifugal sand setting cavity 10I, and the upper part of the gravity settling cylinder 13 is provided with a liquid inlet disc 13b. The area between the incoming liquid inlet disc 13b and the sand setting I-level inlet 13c forms a sand setting I-level cavity 13I, the area between the sand setting I-level inlet 13c and the sand setting II-level inlet 13d forms a sand setting II-level cavity 13II, and the sand setting I-level cavity 13I and the sand setting II-level cavity 13II jointly form an effective sand setting space of the gravity settling cylinder 13. An annular region between the seepage hole 13a and the centrifugal sand settler 10 forms a centrifugal sand settling chamber 10I, and the centrifugal sand settling chamber 10I is an effective sand settling space of the centrifugal sand settler 10. The gravity sand setting space and the centrifugal sand setting space jointly form a sand control structure assembly.
The lower joint 8 of the fixed valve is connected with a centrifugal sand setting device 10, and the whole centrifugal sand setting device 10 is arranged in a gravity settling cylinder 13. Finally, the whole exhaust sand prevention type plunger oil well pump is put into the pump barrel 3. The centrifugal sand settling device 10 is an open cylinder body integrally formed by a straight cylinder section and an expanding section, the expanding section is positioned below the straight cylinder section, the upper part of the expanding section is uniformly provided with sand settling device tangential sand outlets 11, the inner wall of the expanding section is provided with centrifugal separation blades 12 at intervals in a staggered manner, and each centrifugal separation blade 12 is uniformly provided with a centrifugal separation blade exhaust hole 12a.
When the invention works, the plunger 2 is driven by the motor to do up-and-down reciprocating motion, when the plunger 2 moves upwards, the space in the pump cylinder 3 is enlarged, the pressure is reduced, the floating valve ball 4 is closed, the fixed valve ball 7 is opened under the action of the submergence and the pressure difference in the pump cavity, the produced liquid enters the gravity sand setting I-stage cavity 13I from the liquid inlet, a part of sand phase is settled at the bottom of the sand setting I-stage cavity 13I due to the self gravity, the produced liquid which gradually rises enters the sand setting II-stage cavity 13II through the sand setting I-stage inlet 13c, at the moment, part of sand phase is settled at the bottom of the sand setting II-stage cavity 13II due to the self gravity, the produced liquid containing a small amount of sand phase enters the centrifugal separation cavity through the sand setting II-stage inlet 13d, the sand setting II-stage inlets 13d at two sides are equivalent to two inlets for tangential liquid inlet, so that the produced liquid moves upwards at a certain tangential speed, and enters the centrifugal sand setting 10, the centrifugal separation blades 12 can further rotate in an accelerated manner, the sand phase at the moment can be moved in a manner of being tightly attached to the side wall due to the centrifugal effect, so that the sand phase is thrown out of the sand outlet 11 from the sand setting device in a tangential direction, the sand phase enters the centrifugal sand setting cavity 10I, seepage holes 13a are formed in the upper end of the centrifugal sand setting cavity 10I, the sand phase in the sand setting cavity and the produced liquid are prevented from being deposited, the sand phase can flow back into the sand setting II-stage cavity 13II in a seepage manner, the centrifugal separation blades 12 are drilled, a certain number of centrifugal separation blade exhaust holes 12a exist in the centrifugal separation blades, the gas in the produced liquid can move upwards conveniently, and the gas can better flow into the next part of gas-liquid separation cavity to perform gas-liquid separation. At the moment, produced liquid which is effectively prevented from sand and is not exhausted enters the oil outlet valve cover 6 through the fixed valve ball 7, the produced liquid enters the exhaust cavity 5I through the oil outlet valve guide hole 6a, gas-containing produced liquid at the moment is collected on the surfaces of the exhaust tail pipe section 5-1 and the exhaust cone section 5-2 of the exhaust gas separator 5 through the cyclone separation effect of the spiral separation blade 5-3, collected gas is exhausted out of the pump cylinder through the exhaust tail pipe section air outlet 5a and the exhaust cone section air outlet 5b, and due to the cyclone separation principle, liquid moving near the side wall enters the pump cavity through the oil outlet hole 9a, and condensate gas and dissolved gas in the produced liquid are reduced. When the plunger 2 moves downwards, the space in the pump barrel 3 is reduced, the floating valve ball 4 is opened under the pressure, the fixed valve ball 7 is closed, the pump barrel extrudes the gas-containing produced liquid to enter the exhaust cavity 5I, and a small amount of gas in the pump cavity is exhausted under the cyclone separation action of the exhaust gas separator 5. Repeating the steps to finish the oil pumping, air exhausting and sand prevention work of the plunger pump.
The invention can exhaust gas and prevent sand during the working process of the oil well pump, and obviously reduces the problems of sand blocking, air locking and the like frequently occurring in the pump.
Claims (4)
1. The utility model provides an exhaust sand control device for oil-well pump which characterized in that: the exhaust sand prevention device for the oil well pump comprises a plunger (2), a pump cylinder (3), a joint, a fixed valve assembly, an exhaust gas separator (5) and a sand prevention structure assembly, wherein the plunger (2) is arranged in the pump cylinder (3), a traveling valve ball (4) is arranged in a plunger valve ball seat, the lower end of the pump cylinder (3) is connected with a liquid outlet at the upper end of the fixed valve assembly, and a liquid inlet below the fixed valve assembly is provided with the sand prevention structure assembly;
the fixed valve assembly comprises an oil outlet shell (9) and a fixed valve lower joint (8), the oil outlet valve comprises a fixed valve ball (7) and an oil outlet valve cover (6), wherein a fixed valve lower connector (8) is arranged at the lower port of an oil outlet shell (9), the oil outlet valve cover (6) is buckled on the fixed valve lower connector (8), the fixed valve lower connector (8) is communicated with the oil outlet valve cover (6) through an oil outlet valve guide hole (6 a), the fixed valve ball (7) is arranged at the oil outlet valve guide hole (6 a), the oil outlet shell (9) is divided into a left half part and a right half part, the bottom of the left half part and the bottom of the right half part are sealed by the oil outlet valve cover (6), the oil outlet valve cover (6) is communicated with the right half part through the oil outlet valve guide hole (6 a), the right half part is provided with a sealing cover, a gas discharge separator (5) is hung on the right half part, the outlet of the gas discharge separator (5) is communicated with a shaft (14), and the left half part is communicated with the right half part through the oil outlet hole (9 a); a cavity formed by the exhaust gas separator (5) and the right half part is an exhaust cavity (5I), the exhaust gas separator (5) is a revolving body formed by a spiral separation blade (5-3), an exhaust conical section (5-2) and an exhaust tail pipe section (5-1) from bottom to top, and air outlet holes are uniformly distributed in the circumferential direction on the exhaust conical section (5-2) and the exhaust tail pipe section (5-1);
the sand control structure assembly comprises a gravity settling cylinder (13) and a centrifugal sand setting device (10), wherein the gravity settling cylinder (13) is a cylinder body with a closed lower end and is provided with an annular sand setting cavity and a centrifugal sand setting cavity (10I), the annular sand setting cavity is wound outside the centrifugal sand setting cavity (10I) and is communicated with the centrifugal sand setting cavity, the centrifugal sand setting device (10) is arranged in the centrifugal sand setting cavity (10I), and the upper part of the gravity settling cylinder is provided with a liquid inlet disc (13 b);
the centrifugal sand setting device (10) is an open cylinder body integrally formed by a straight cylinder section and an expanding section, the expanding section is positioned below the straight cylinder section, the upper part of the expanding section is uniformly provided with sand setting device tangential sand outlets (11), the inner wall of the expanding section is alternately provided with centrifugal separation blades (12) at intervals, and each centrifugal separation blade (12) is uniformly provided with a centrifugal separation blade exhaust hole (12 a).
2. The exhaust sand control device for an oil well pump according to claim 1, wherein: the shape of the exhaust cavity (5I) is similar to that of an inverted exhaust separator, and gas phase of a light phase is collected near the exhaust tail pipe section (5-1) and the exhaust conical section (5-2) under the rotational flow effect of the spiral separation blade (5-3), and the exhaust cavity (5I) is further beneficial to the collection of the gas phase at the exhaust tail pipe section and the exhaust conical section, so that the gas is exhausted out of the pump cylinder through the exhaust tail pipe section gas outlet hole (5 a) and the exhaust conical section gas outlet hole (5 b).
3. The exhaust sand control device for an oil well pump according to claim 2, wherein: the annular sand setting cavity is composed of a sand setting I-level cavity (13I) and a sand setting II-level cavity (13 II), wherein the region between an incoming liquid inlet disc (13 b) and a sand setting I-level inlet (13 c) forms a sand setting I-level cavity (13I), the region between the sand setting I-level inlet (13 c) and a sand setting II-level inlet (13 d) forms a sand setting II-level cavity (13 II), and the sand setting I-level cavity (13I) and the sand setting II-level cavity (13 II) jointly form an effective sand setting space of the gravity settling cylinder; the upper end of the secondary sand setting barrel is provided with a seepage hole (13 a), and an annular area between the seepage hole (13 a) and the centrifugal sand setting device (10) forms a centrifugal sand setting cavity (10I).
4. The exhaust sand control device for an oil well pump according to claim 3, wherein: the plunger (2) is pushed by an oil pumping motor to do up-and-down reciprocating motion in the pump cylinder (3), during an up stroke, the fixed valve ball (7) is opened, produced liquid passes through the sand setting I-stage cavity (13I) and the sand setting II-stage cavity (13 II) to play a primary sand prevention role based on the gravity of a sand phase, the produced liquid containing a relatively small amount of the sand phase plays a further sand prevention role through the centrifugal sand setting device (10), the produced liquid from the centrifugal sand setting device (10) contains a large amount of condensate gas and dissolved gas, the condensate gas and the dissolved gas are discharged into a shaft (14) through the rotational flow separation effect of the gas discharge separator (5), and the liquid enters the pump cylinder (3); during downstroke, the fixed valve ball (7) is closed, the pump barrel extrudes liquid and gas to enter the exhaust cavity (5I), and a small amount of gas in the pump cavity is discharged under the cyclone separation action of the exhaust separator (5); the reciprocating circulation makes the plunger oil pump play the purpose of exhausting and preventing sand, thereby improving the pump efficiency and prolonging the service life of the pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882991.3A CN110485970B (en) | 2019-09-18 | 2019-09-18 | Exhaust sand prevention device for oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882991.3A CN110485970B (en) | 2019-09-18 | 2019-09-18 | Exhaust sand prevention device for oil well pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110485970A CN110485970A (en) | 2019-11-22 |
| CN110485970B true CN110485970B (en) | 2021-10-29 |
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ID=68558369
Family Applications (1)
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| CN201910882991.3A Active CN110485970B (en) | 2019-09-18 | 2019-09-18 | Exhaust sand prevention device for oil well pump |
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| CN110939426B (en) * | 2019-11-19 | 2021-09-28 | 东北石油大学 | Centrifugal separation mechanism and co-well injection and production device using same |
| CN110966168B (en) * | 2019-12-18 | 2021-03-23 | 东北石油大学 | Sand setting and exhausting device of plunger pump |
| CN113309497A (en) * | 2021-06-21 | 2021-08-27 | 托普威尔石油技术股份公司成都分公司 | Quick-falling plunger device |
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