CN111155955B - Negative pressure type oil-gas mixed pump capable of being matched with blowout preventer and method - Google Patents
Negative pressure type oil-gas mixed pump capable of being matched with blowout preventer and method Download PDFInfo
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- CN111155955B CN111155955B CN202010061225.3A CN202010061225A CN111155955B CN 111155955 B CN111155955 B CN 111155955B CN 202010061225 A CN202010061225 A CN 202010061225A CN 111155955 B CN111155955 B CN 111155955B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 210000002445 nipple Anatomy 0.000 claims abstract description 46
- 239000010985 leather Substances 0.000 claims abstract description 43
- 230000008878 coupling Effects 0.000 claims abstract description 32
- 238000010168 coupling process Methods 0.000 claims abstract description 32
- 238000005859 coupling reaction Methods 0.000 claims abstract description 32
- 230000002265 prevention Effects 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 47
- 238000003825 pressing Methods 0.000 claims description 16
- 238000005086 pumping Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000003129 oil well Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 8
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Reciprocating Pumps (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention belongs to the technical field of oil well shaft gas prevention and associated gas recovery in an oil field, and particularly relates to a negative pressure type oil gas mixed pump capable of being matched with a blowout prevention bleeder and a method thereof. The invention comprises a sucker rod coupling, a pull rod, a pressure cap, an anti-gas slide valve, an anti-gas valve cover, an anti-gas valve seat, a central tube, a one-way leather cup, a seat sealing nipple, a clamping tooth, an unsealing cap, a clamping groove, a plunger, a traveling valve, a pump barrel coupling and a pump barrel. The invention realizes the recovery of the underground associated gas of the oil well, and solves the problem that the blowout prevention oil drainage device cannot be opened and the blowout prevention is not caused by matching with the common impact oil drainage device when the oil-gas mixed pump with the negative pressure is in the well.
Description
Technical Field
The invention belongs to the technical field of oil well shaft gas prevention and associated gas recovery in an oil field, and particularly relates to a negative pressure type oil gas mixed pump capable of being matched with a blowout prevention bleeder and a method thereof.
Background
At present, many oilfield associated gas resources are rich, and the earlier-stage on-site oil well is used for carrying out sleeve emptying associated gas, so that huge waste of resources is caused. At present, the associated gas recovery method is mainly carried out by adopting a mode of installing a constant pressure valve at a wellhead and an underground oil-gas mixed pump, but the constant pressure valve cannot solve the problem of recovering the high back pressure oil well casing gas, the underground oil-gas mixed pump can effectively recover the associated gas from a shaft, at present, the underground oil-gas mixed pump of an oil well mainly has a negative pressure type and a double-acting type, and the double-acting type also has a negative pressure structure. The negative pressure exhaust principle is adopted in the mixed pump, the gas-proof slide valve is designed at the upper end of the pump, the pull rod is required to be limited and fixed after being impacted by the hoops after the gas-proof slide valve is in a well, the pull rod can not move downwards after being fixed, the plunger connected with the lower end of the pull rod can not impact the blowout-preventing oil drain accurately, and the blowout-preventing oil drain can not open a channel effectively.
Disclosure of Invention
The invention provides a negative-pressure type oil-gas mixed pump and a method which can be matched with an anti-blowout oil drain device, and aims to provide a negative-pressure type oil-gas mixed pump and a method which can effectively prevent blowout, can open the anti-blowout oil drain device and finish sealing of a slide valve seat, and do not influence the normal operation of the mixed pump.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a negative pressure type oil-gas mixed pump capable of being matched with an anti-blowout oil drain comprises a sucker rod coupling, a pull rod, a pressure cap, an anti-gas slide valve, an anti-gas valve cover, an anti-gas valve seat, a central pipe, a one-way leather cup, a seat seal nipple, a clamping tooth, a deblocking cap, a clamping groove, a plunger, a traveling valve, a pump barrel coupling and a pump barrel; the sucker rod coupling is connected to the end head of one end of the pull rod; the pressure cap is connected with one end of the air-proof valve cover; the gas-proof slide valve is sleeved on the pull rod and is arranged in the gas-proof valve cover, and a gap is reserved between the gas-proof slide valve and the pull rod and is arranged on the gas-proof valve seat; the central pipe is sleeved outside the pull rod, and one end of the central pipe is connected with the other end of the air-proof valve cover; the air-proof valve seat is clamped between the steps of the air-proof valve cover and the central tube; one end of the seat sealing nipple is connected with the other end of the central pipe; the one-way leather cup is fixedly connected to the outer wall of the central tube, and the outer diameter of the one-way leather cup is in interference fit with the inner diameter of the seat sealing nipple; the clamping teeth are connected with the central pipe and are contacted with the inner wall of the seat sealing nipple; the deblocking cap is sleeved on the outer side wall of the other end of the pull rod; one end of the plunger is connected with the other end of the pull rod; the other end of the plunger is connected with the traveling valve; one end of the pump cylinder tie hoop is connected with the seat seal nipple, and the other end of the pump cylinder tie hoop is connected with the pump cylinder.
The gap between the gas-proof slide valve and the pull rod is not more than 2mm.
The sucker rod coupling is connected with the pull rod, the pressing cap is connected with the air-proof valve cover, the central pipe is connected with the air-proof valve cover, the clamping teeth are connected with the central pipe, the seat sealing nipple is connected with the central pipe, the plunger is connected with the pull rod, the deblocking cap is connected with the pull rod, and the traveling valve is connected with the plunger in a threaded mode.
The vertical movement distance of the gas-proof slide valve is 55-65mm.
The unidirectional leather cup is umbrella-shaped, and the opening of the unidirectional leather cup faces to the sucker rod coupling; the unidirectional leather cups are provided with a plurality of unidirectional leather cups, and the unidirectional leather cups are fixed on the outer wall of the central tube after being subjected to integral hot working treatment.
The number of the unidirectional leather cups is 3.
Two sides of the clamping tooth body are provided with two-way chamfers, and the chamfers are 30-50 degrees.
The chamfer angle of the clamping tooth body is 45 degrees.
The inner wall of the seat seal nipple is provided with a clamping groove, and the depth of the clamping groove is the same as the thickness of the clamping teeth.
A pumping method of a negative pressure type oil-gas mixed pumping pump capable of being matched with a blowout prevention bleeder comprises the following steps of
Step one: connection of devices
The blowout preventer and a fixed valve are connected below a negative pressure type oil-gas mixed pump which can be matched with the blowout preventer;
step two: descending a well
In the process of descending the well, the sucker rod is connected with a sucker rod coupling, the sucker rod pushes the plunger to descend to the well to the end, the clamping teeth enter the seat seal nipple, the clamping teeth are supported on the inner wall of the seat seal nipple, the sucker rod coupling presses down the pressing cap, the pressing cap drives the clamping teeth to descend, when reaching the clamping groove, the clamping cap is supported and fixed in the clamping groove, at the moment, the weight of all sucker rods is pressed on the pressing cap and transferred to the clamping teeth, and as the clamping teeth are downwards provided with chamfer angles, the clamping teeth are pushed to cross the clamping groove to descend under the action of the weight until the plunger is propped against the blowout preventing mechanism of the blowout preventer after the plunger is detected, and an oil flow channel is opened;
step three: lifting sucker rod
Lifting the sucker rod after the step two is completed, lifting the plunger and the deblocking cap, pushing the lower part of the central tube upwards by the deblocking cap to drive the clamping teeth to move upwards, automatically opening the clamping groove reaching the seat sealing nipple by using elasticity, fixing and fastening the clamping groove, and then, not lifting the sucker rod after the sucker rod meets resistance, completing seat sealing and adjusting the anti-flushing production;
Step four: downstroke of
The gas-proof slide valve is closed, the upper liquid acts on the gas-proof slide valve, the unidirectional leather cup is propped up to form a seal under the pressure of a small amount of liquid at the upper part, the liquid is prevented from descending, the plunger descends, no liquid exists in the pump barrel, a negative pressure space is formed, and the liquid and gas in the pump barrel enter the plunger under the action of negative pressure;
Step five: upstroke (upstroke)
After the step four is completed, the plunger ascends to drive the liquid above the plunger to jack up the gas-proof slide valve, the liquid and the gas are discharged, and the step four is returned;
step six: recovery device
After the oil pumping is finished, the negative pressure type oil-gas mixed pumping pump of the blowout prevention oil drain stops working, and the device is lifted up and retracted, so that the whole oil pumping process is finished.
The beneficial effects are that:
(1) The pump cylinder is connected with the blowout prevention oil drain device and the fixed valve, and the two are operated conventionally, so that the invention does not describe the action process in detail. In the process of descending the plunger into the well, under the pushing of the mechanical force of the pull rod, the plunger pushes up the blowout prevention mechanism of the blowout prevention oil drain after descending the bottom, and the oil flow channel is effectively opened.
(2) After the sealing nipple is opened, the plunger is lifted up, the central tube is jacked up by using the deblocking cap, the clamping teeth move upwards, and the clamping groove reaching the sealing nipple is automatically opened by utilizing elasticity and is fixedly fastened with the clamping groove.
(3) After the invention is fixed, the invention is produced normally, in the down stroke process, the liquid column above the pump acts on the gas-proof slide valve, a vacuum negative pressure cavity is formed in the pump cylinder, the travelling valve is opened by the action of negative pressure, and gas and liquid are promoted to easily enter the pump. The unidirectional leather cup is propped up to form a seal under the pressure of a small amount of liquid at the upper part, so that the liquid is prevented from descending; the liquid and gas above the piston in the up stroke process push off the gas-proof slide valve to be discharged out of the pump cylinder. And the generated negative pressure is utilized to enhance the air collecting and exhausting capacity of the pump.
(4) The blowout prevention oil drainage device can be matched for well descending operation, achieves the purpose of safely producing the blowout prevention and the opening of the liquid inlet channel after well descending, can produce at negative pressure, and enhances the exhaust capacity.
The foregoing description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood, it can be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present invention will be given with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-a sucker rod coupling; 2-a pull rod; 3-pressing the cap; 4-an anti-gas slide valve; 5-an air-proof valve cover; 6-an air-proof valve seat; 7-a central tube; 8-a one-way leather cup; 9-setting the pup joint; 10-clamping teeth; 11-unsealing the cap; 12-clamping grooves; 13-a plunger; 14-a traveling valve; 15-pump barrel coupling; 16-pump cylinder.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the negative-pressure oil-gas mixed pump capable of being matched with the blowout preventer and the oil drain device shown in fig. 1 comprises a sucker rod coupling 1, a pull rod 2, a pressure cap 3, an anti-gas slide valve 4, an anti-gas valve cover 5, an anti-gas valve seat 6, a central tube 7, a one-way leather cup 8, a seat seal nipple 9, a clamping tooth 10, a deblocking cap 11, a clamping groove 12, a plunger 13, a traveling valve 14, a pump barrel coupling 15 and a pump barrel 16; the sucker rod coupling 1 is connected to the end head of one end of the pull rod 2; the pressure cap 3 is connected with one end of the air-proof valve cover 5; the gas-proof slide valve 4 is sleeved on the pull rod 2 and is arranged in the gas-proof valve cover 5, and a gap is reserved between the gas-proof slide valve 4 and the pull rod 2 and is arranged on the gas-proof valve seat 6; the central tube 7 is sleeved outside the pull rod 2, and one end of the central tube 7 is connected with the other end of the air-proof valve cover 5; the air-proof valve seat 6 is clamped between steps of the air-proof valve cover 5 and the central tube 7; one end of the seat sealing nipple 9 is connected with the other end of the central pipe 7; the unidirectional leather cup 8 is fixedly connected to the outer wall of the central tube 7, and the outer diameter of the unidirectional leather cup 8 is in interference fit with the inner diameter of the seat sealing nipple 9; the clamping teeth 10 are connected with the central tube 7 and are contacted with the inner wall of the seat sealing nipple 9; the deblocking cap 11 is sleeved on the outer side wall of the other end of the pull rod 2; one end of the plunger 13 is connected with the other end of the pull rod 2; the other end of the plunger 13 is connected with a traveling valve 14; one end of the pump cylinder tie hoop 15 is connected with the seat seal nipple 9, and the other end of the pump cylinder tie hoop 15 is connected with the pump cylinder 16.
When in actual use, the blowout preventer and the fixed valve are connected below the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer, and then the well is closed. In the process of descending the well, the blowout prevention oil drain device is closed, the sucker rod is connected with the sucker rod coupling 1 during the well descending, the sucker rod pushes the plunger 13 to descend to the last time, the clamping teeth 10 enter the seat seal nipple 9, the sucker rod coupling 1 is supported on the inner wall of the seat seal nipple 9 by self elasticity, the pressing cap 3 is pressed down, the clamping teeth 10 are driven to descend, when reaching the clamping groove 12, the clamping cap 3 is supported and fixed in the clamping groove 12, at the moment, the weight of all sucker rods is pressed on the pressing cap 3 and transferred to the clamping teeth 10, and due to the fact that the clamping teeth 10 are downwards provided with chamfers, the clamping teeth 10 are pushed to descend beyond the clamping groove 12 under the action of the weight until the plunger 13 is pushed down to the blowout prevention mechanism of the blowout prevention oil drain device, and an oil flow channel is opened. After the oil flow channel is opened, the sucker rod is lifted up, the plunger 13 and the deblocking cap 11 move upwards along with the lifting, the deblocking cap 11 pushes the lower part of the central tube 7 upwards to drive the clamping teeth 10 to move upwards, the clamping groove 12 reaching the seat sealing nipple 9 is automatically opened by using elastic force and is fixedly fastened with the clamping groove 12, the lifting is not performed after the resistance is met, the seat sealing is completed, and the anti-impact distance is adjusted to perform normal production. During the down stroke, the anti-gas slide valve 4 is closed, upper liquid acts on the anti-gas slide valve 4, the one-way leather cup 8 is unfolded to form a seal under the pressure of the upper liquid, the liquid is prevented from descending, the plunger 13 descends, no liquid exists in the pump cylinder 16 to form a negative pressure space, and the liquid and gas in the pump cylinder 16 enter the plunger 13 under the action of negative pressure; during the up stroke, the plunger 13 moves upwards to drive the liquid above the plunger 13 to push the gas-proof slide valve 4, the liquid and the gas are discharged, and the process is circulated to finish oil pumping. When the pipe column is required to be lifted, the negative pressure type oil-gas mixed pump stops working, and the device is lifted out of the shaft along with the oil pipe and the sucker rod.
The gas-proof slide valve 4 is sleeved on the pull rod 2 in the gas-proof valve cover 5, is spaced from the pull rod and is seated on the gas-proof valve seat, and plays a role in unidirectional sealing. The outer diameter of the unidirectional leather cup 8 is in interference fit with the inner diameter of the seat sealing nipple 9, and the unidirectional leather cup is clung to the surface of the seat sealing nipple, so that a unidirectional sealing effect is achieved; the clamping teeth 10 are connected with the center 7 and cling to the inner wall of the seat seal nipple 9 by self elasticity. The plunger 13 is changed from the top to the top of the unsealing cap 11, so that the plunger 13 is protected; the unidirectional leather cup 8 is used as a sealing mechanism, is in win-win fit with the inner wall of the seat sealing nipple 9 to form a seal, can move up and down, and is matched with the seat sealing mechanism to move up and down at the seat sealing position. After normal production, the liquid above the pump acts on the unidirectional leather cup, and the leather cup is opened again to enhance the tightness.
By adopting the technical scheme of the invention, not only can the blowout prevention be effectively realized, but also the blowout prevention oil drain device can be opened, and the sealing of the slide valve seat can be completed, so that the normal operation of the mixed pump is not influenced.
Embodiment two:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer shown in fig. 1, the difference with the embodiment is that: the gap between the gas-proof slide valve 4 and the pull rod 2 is not more than 2mm.
In actual use, the anti-gas slide valve 4 can move up and down on the pull rod. In the down stroke, the upper liquid of the oil well pump acts on the gas-proof slide valve 4, and because the gap between the gas-proof slide valve 4 and the pull rod 2 is small, the upper liquid cannot flow into the pump cylinder 16 in a large amount, a negative pressure space is generated in the pump cylinder 16, and a large pressure difference is generated between the upper liquid and the bottom of the pump cylinder 16, so that the gas-liquid mixture at the bottom of the pump cylinder 16 enters the pump cylinder 16 under the action of the pressure difference, and is discharged out of the pump cylinder 16 after the up stroke plunger 13 is lifted, and the associated gas recovery rate reaches more than 85%.
Embodiment III:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer shown in fig. 1, the difference with the embodiment is that: the sucker rod coupling 1 is connected with the pull rod 2, the pressure cap 3 is connected with the air-proof valve cover 5, the central pipe 7 is connected with the air-proof valve cover 5, the clamping teeth 10 are connected with the central pipe 7, the seat sealing nipple 9 is connected with the central pipe 7, the plunger 13 is connected with the pull rod 2, the deblocking cap 11 is connected with the pull rod 2, and the travelling valve 14 is connected with the plunger 13 in a threaded mode.
During actual use, the sucker rod coupling 1 is connected with the pull rod 2, the pressing cap 3 is connected with the air-proof valve cover 5, the central pipe 7 is connected with the air-proof valve cover 5, the clamping teeth 10 are connected with the central pipe 7, the seat sealing nipple 9 is connected with the central pipe 7, the plunger 13 is connected with the pull rod 2, the deblocking cap 11 is connected with the pull rod 2, and the traveling valve 14 is connected with the plunger 13 in a threaded connection mode, so that the invention is convenient to maintain and install.
Embodiment four:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer shown in fig. 1, the difference with the embodiment is that: the vertical movement distance of the anti-gas slide valve 4 is 55-65mm.
When in actual use, the vertical movement distance of the gas-proof slide valve 4 is 55-65mm, if the vertical movement distance is more than 65mm, in actual operation, the gas-proof slide valve cannot be down seated on the gas-proof valve seat 6 at the beginning of the down stroke, so that the sealing is not tight, liquid flows into the pump cylinder 16, and the formation of negative pressure in the pump is affected. The effect is best when the activity distance is 60mm, and the recovery rate of associated gas reaches more than 85 percent.
Fifth embodiment:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer shown in fig. 1, the difference with the embodiment is that: the unidirectional leather cup 8 is umbrella-shaped, and the opening faces the sucker rod coupling 1; the unidirectional leather cups 8 are arranged in a plurality, and the unidirectional leather cups 8 are integrally heat-processed and then fixed on the outer wall of the central tube 7.
Preferably, 3 unidirectional leather cups 8 are arranged.
When in actual use, the unidirectional leather cup 8 is umbrella-shaped, the opening faces the sucker rod coupling 1, the outer diameter is in interference fit with the inner diameter of the seat sealing nipple, and the surface of the seat sealing nipple is tightly attached to the outer diameter, so that the unidirectional sealing effect is achieved. The plurality of one-way leather cups 8 are fixed on the outer wall of the central tube 7 after being integrally heat-processed, so that the one-way sealing effect is better. The one-way leather cup 8 is provided with 3 leather cups, so that a good sealing effect can be realized, and the cost is saved. The number of the unidirectional leather cups 8 can be increased or decreased according to actual needs.
After normal production, the liquid above the pump acts on the unidirectional leather cup, and the leather cup is opened again to enhance the tightness.
Example six:
According to the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer shown in fig. 1, the difference with the embodiment is that: two sides of the clamping tooth 10 body are provided with two-way chamfers, and the chamfers are 30-50 degrees.
The chamfer angle of the clamping tooth 10 body is 45 degrees.
During actual use, the clamping teeth 10 of the anti-gas-tight sliding valve seat sealing mechanism are designed to be provided with two-way chamfers, so that the sealing mechanism is pushed to move downwards by utilizing the weight of a pole when reaching a sealing position, the plunger 13 is driven to move downwards to the bottom, then the oil inlet channel of the anti-spraying oil drain device is jacked up to be produced, the central tube 7 in the sealing mechanism can move upwards under the action of the jacking of the unsealing cap, the clamping teeth 10 are driven to move upwards to reach the clamping groove and are fixed in the clamping groove by utilizing self elasticity, and the sealing mechanism can also be forced to move upwards when operating the sucker rod. The chamfer angle is 30-50 deg., and is most preferred when the chamfer angle is 45 deg..
Embodiment seven:
According to the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer shown in fig. 1, the difference with the embodiment is that: the inner wall of the seat seal nipple 9 is provided with a clamping groove 12, and the depth of the clamping groove 12 is the same as the thickness of the clamping tooth 10.
When in actual use, the clamping groove 12 is formed in the inner wall of the seat sealing nipple 9, the depth of the clamping groove 12 is the same as the thickness of the clamping tooth 10, and the clamping tooth 10 can be ensured to be firmly connected with the seat sealing nipple 9 when not working. When the bayonet 10 is operated, it is smoothly operated due to the existence of the chamfer thereof.
Example eight:
according to the pumping method of the negative pressure type oil-gas mixed pumping pump which can be matched with the blowout preventer shown in the figure 1, the pumping method comprises the following steps of
Step one: connection of devices
The blowout preventer and a fixed valve are connected below a negative pressure type oil-gas mixed pump which can be matched with the blowout preventer;
step two: descending a well
In the process of descending the well, the sucker rod is connected with the sucker rod coupling 1, the sucker rod pushes the plunger 13 to descend to the end, the clamping teeth 10 enter the seat seal nipple 9, the clamping teeth 10 are supported on the inner wall of the seat seal nipple 9, the sucker rod coupling 1 presses down the pressing cap 3, the pressing cap 3 drives the clamping teeth 10 to descend, when reaching the clamping groove 12, the clamping grooves 12 are supported and fixed, at the moment, all the weight of the sucker rod is pressed on the pressing cap 3 and transferred to the clamping teeth 10, and as the clamping teeth 10 are provided with chamfer angles downwards, the clamping teeth 10 are pushed to descend beyond the clamping groove 12 under the action of the weight until the plunger 13 is pushed up to open the blowout preventing mechanism of the blowout preventer after bottom detection, and an oil flow channel is opened;
step three: lifting sucker rod
Lifting the sucker rod after the step two is completed, lifting the plunger 13 and the deblocking cap 11 along with the lifting, lifting the lower part of the central tube 7 by the deblocking cap 11, driving the clamping teeth 10 to lift upwards, automatically opening the clamping groove 12 reaching the seat sealing nipple 9 by using elasticity, and fixing and fastening with the clamping groove 12, wherein the lifting is not performed after resistance is met, the seat sealing is completed, and the anti-impact production is adjusted;
Step four: downstroke of
The gas-proof slide valve 4 is closed, the upper liquid acts on the gas-proof slide valve 4, the unidirectional leather cup 8 is propped up to form a seal under the pressure of a small amount of upper liquid, the liquid is prevented from descending, the plunger 13 descends, no liquid exists in the pump cylinder 16, a negative pressure space is formed, and the liquid and gas in the pump cylinder 16 enter the plunger 13 under the action of negative pressure;
Step five: upstroke (upstroke)
After the step four is completed, the plunger 13 ascends to drive the liquid above the plunger 13 to jack the gas-proof slide valve 4, the liquid and the gas are discharged, and the step four is returned;
step six: recovery device
After the oil pumping is finished, the negative pressure type oil-gas mixed pumping pump of the blowout prevention oil drain stops working, and the device is lifted up and retracted, so that the whole oil pumping process is finished.
When the anti-blowout oil drain device is actually used, the pump barrel is connected with the anti-blowout oil drain device and the fixed valve, and then the pump barrel is put into the well, the plunger 13 is pushed by the mechanical force of the pull rod to push the anti-blowout oil drain device to open the anti-blowout mechanism of the anti-blowout oil drain device after the plunger 13 descends to the bottom, and the oil flow channel is effectively opened. After the oil flow is opened, the plunger is lifted up, the central tube 7 is jacked up by using the deblocking cap 11, the clamping teeth are lifted upwards, and the clamping groove reaching the seat sealing nipple is automatically opened by utilizing elasticity and is fixedly fastened with the clamping groove. After the invention is fixed, normal production is carried out, in the down stroke process, a liquid column above a negative pressure type oil-gas mixed pump which can be matched with the anti-spraying oil drain device acts on the anti-gas slide valve 4, a vacuum negative pressure cavity is formed in the pump cylinder 16, a traveling valve is opened through the negative pressure effect, and gas and liquid are promoted to easily enter the negative pressure type oil-gas mixed pump which can be matched with the anti-spraying oil drain device. The unidirectional leather cup 8 is spread under the pressure of a small amount of liquid at the upper part to form a seal, so that the liquid is prevented from descending; the liquid and gas in the upper part of the plunger 13 pushes up the gas-proof slide valve 4 to discharge the pump cylinder 16 during the up stroke. The produced negative pressure is utilized to enhance the air collecting and exhausting capacity of the negative pressure type oil-gas mixed pump which can be matched with the blowout preventer.
The blowout prevention oil drainage device can be matched for well descending operation, achieves the purpose of safely producing the blowout prevention and the opening of the liquid inlet channel after well descending, can produce at negative pressure, and enhances the exhaust capacity.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
While the invention is susceptible of embodiments in accordance with the preferred embodiments, the invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a can form a complete set negative pressure formula oil gas pump that mixes of preventing spouting bleeder which characterized in that: the anti-gas valve comprises a sucker rod coupling (1), a pull rod (2), a press cap (3), an anti-gas slide valve (4), an anti-gas valve cover (5), an anti-gas valve seat (6), a central tube (7), a one-way leather cup (8), a seat seal nipple (9), a clamping tooth (10), an unsealing cap (11), a clamping groove (12), a plunger (13), a traveling valve (14), a pump cylinder coupling (15) and a pump cylinder (16); the sucker rod coupling (1) is connected to the end head of one end of the pull rod (2); the pressure cap (3) is connected with one end of the air-proof valve cover (5); the gas-proof slide valve (4) is sleeved on the pull rod (2) and is arranged in the gas-proof valve cover (5), and a gap is reserved between the gas-proof slide valve (4) and the pull rod (2) and is arranged on the gas-proof valve seat (6); the central tube (7) is sleeved outside the pull rod (2), and one end of the central tube (7) is connected with the other end of the air-proof valve cover (5); the air-proof valve seat (6) is clamped between the steps of the air-proof valve cover (5) and the central tube (7); one end of the seat sealing nipple (9) is connected with the other end of the central pipe (7); the unidirectional leather cup (8) is fixedly connected to the outer wall of the central tube (7), and the outer diameter of the unidirectional leather cup (8) is in interference fit with the inner diameter of the seat sealing nipple (9); the clamping teeth (10) are connected with the central pipe (7) and are contacted with the inner wall of the seat sealing nipple (9); the deblocking cap (11) is sleeved on the outer side wall of the other end of the pull rod (2); one end of the plunger (13) is connected with the other end of the pull rod (2); the other end of the plunger (13) is connected with a traveling valve (14); one end of the pump barrel coupling (15) is connected with the seat sealing nipple (9), and the other end of the pump barrel coupling (15) is connected with the pump barrel (16);
the gap between the gas-proof slide valve (4) and the pull rod (2) is not more than 2mm;
the vertical movement distance of the gas-proof slide valve (4) is 55-65mm;
Two sides of the clamping tooth (10) body are provided with two-way chamfers, and the chamfers are 30-50 degrees;
the inner wall of the seat sealing nipple (9) is provided with a clamping groove (12), and the depth of the clamping groove (12) is the same as the thickness of the clamping tooth (10).
2. The negative pressure type oil-gas mixing pump capable of being matched with an anti-blowout bleeder as defined in claim 1, wherein the negative pressure type oil-gas mixing pump is characterized in that: the sucker rod coupling is characterized in that threaded connection is adopted among the sucker rod coupling (1), the pull rod (2), the pressing cap (3), the air-proof valve cover (5), the central pipe (7) and the air-proof valve cover (5), the clamping teeth (10) and the central pipe (7), the seat sealing nipple (9) and the central pipe (7), the plunger (13) and the pull rod (2) and the traveling valve (14) and the plunger (13).
3. The negative pressure type oil-gas mixing pump capable of being matched with an anti-blowout bleeder as defined in claim 1, wherein the negative pressure type oil-gas mixing pump is characterized in that: the unidirectional leather cup (8) is umbrella-shaped, and the opening faces the sucker rod coupling (1); the unidirectional leather cups (8) are arranged in a plurality, and the unidirectional leather cups (8) are fixed on the outer wall of the central tube (7) after being integrally processed by hot working.
4. A negative pressure oil and gas pump for a blowout preventer as set forth in claim 3, wherein: the number of the unidirectional leather cups (8) is 3.
5. The negative pressure type oil-gas mixing pump capable of being matched with an anti-blowout bleeder as defined in claim 1, wherein the negative pressure type oil-gas mixing pump is characterized in that: the chamfer angle of the clamping tooth (10) body is 45 degrees.
6. A method of pumping oil by a negative pressure type oil-gas pump for a blowout preventer as claimed in any one of claims 1 to 5, comprising the steps of
Step one: connection of devices
The blowout preventer and a fixed valve are connected below a negative pressure type oil-gas mixed pump which can be matched with the blowout preventer;
step two: descending a well
In the process of descending a well, the sucker rod is connected with a sucker rod coupling (1), the sucker rod pushes a plunger (13) to descend to the end, a clamping tooth (10) enters a seat seal nipple (9), the clamping tooth (10) is supported on the inner wall of the seat seal nipple (9), the sucker rod coupling (1) presses down a pressing cap (3), the pressing cap (3) drives the clamping tooth (10) to descend, when reaching a clamping groove (12), the pressing cap is supported and fixed in the clamping groove (12), at the moment, all the weight of the sucker rod is pressed on the pressing cap (3) and transferred to the clamping tooth (10), and the clamping tooth (10) is pushed to descend beyond the clamping groove (12) under the action of the weight due to the fact that the clamping tooth (10) is chamfered, and the blowout prevention mechanism of the blowout preventer is jacked up after the plunger (13) is detected to the bottom, so as to open an oil flow channel;
step three: lifting sucker rod
Lifting the sucker rod after the step two is completed, lifting the plunger (13) and the deblocking cap (11) along with the plunger, lifting the lower part of the central tube (7) by the deblocking cap (11) to drive the clamping teeth (10) to ascend, automatically opening the clamping groove (12) reaching the seat sealing nipple (9) by utilizing elasticity, and fixing and fastening the clamping groove (12), wherein the plunger and the deblocking cap are not lifted after encountering resistance at the moment, thus finishing seat sealing and adjusting the anti-impact production;
Step four: downstroke of
The gas-proof slide valve (4) is closed, upper liquid acts on the gas-proof slide valve (4), the unidirectional leather cup (8) is opened to form a seal under the pressure of a small amount of upper liquid, the liquid is prevented from descending, the plunger (13) descends, no liquid exists in the pump cylinder (16) to form a negative pressure space, and the liquid and gas in the pump cylinder (16) enter the plunger (13) under the action of negative pressure;
Step five: upstroke (upstroke)
After the step four is completed, the plunger (13) ascends to drive the liquid above the plunger (13) to jack up the gas-proof slide valve (4), and the liquid and the gas are discharged and returned to the step four;
step six: recovery device
After the oil pumping is finished, the negative pressure type oil-gas mixed pumping pump of the blowout prevention oil drain stops working, and the device is lifted up and retracted, so that the whole oil pumping process is finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061225.3A CN111155955B (en) | 2020-01-19 | 2020-01-19 | Negative pressure type oil-gas mixed pump capable of being matched with blowout preventer and method |
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| CN202010061225.3A CN111155955B (en) | 2020-01-19 | 2020-01-19 | Negative pressure type oil-gas mixed pump capable of being matched with blowout preventer and method |
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| CN111155955A CN111155955A (en) | 2020-05-15 |
| CN111155955B true CN111155955B (en) | 2024-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115749701B (en) * | 2022-12-06 | 2023-11-17 | 山东威马泵业股份有限公司 | Blowout prevention pipe type oil pump |
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| WO2008083522A1 (en) * | 2007-01-11 | 2008-07-17 | Jianjun Ling | A rod pump used for eliminating eccentric rod wear and providing forward well-flushing |
| CN207776833U (en) * | 2017-10-26 | 2018-08-28 | 陕西鼎和源瑞环境工程有限公司 | A kind of multifunctional squeezing ash bridge plug |
| CN108999595A (en) * | 2018-07-23 | 2018-12-14 | 中国石油天然气股份有限公司 | Positive-pressure oil drainage process of oil well pump |
| CN212054595U (en) * | 2020-01-19 | 2020-12-01 | 中国石油天然气股份有限公司 | Negative pressure type oil-gas mixed pumping pump capable of being matched with blowout prevention oil drain device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2407159Y (en) * | 1999-11-17 | 2000-11-22 | 中国石化集团河南石油勘探局采油工艺研究所 | Rod oil sucker against blowout |
| CN105570102A (en) * | 2015-12-29 | 2016-05-11 | 中国石油天然气股份有限公司 | Oil well downhole oil-gas mixed pumping pump |
| CN208587281U (en) * | 2018-07-02 | 2019-03-08 | 中国石油天然气股份有限公司 | Double-acting oil well underground gas-proof oil well pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008083522A1 (en) * | 2007-01-11 | 2008-07-17 | Jianjun Ling | A rod pump used for eliminating eccentric rod wear and providing forward well-flushing |
| CN207776833U (en) * | 2017-10-26 | 2018-08-28 | 陕西鼎和源瑞环境工程有限公司 | A kind of multifunctional squeezing ash bridge plug |
| CN108999595A (en) * | 2018-07-23 | 2018-12-14 | 中国石油天然气股份有限公司 | Positive-pressure oil drainage process of oil well pump |
| CN212054595U (en) * | 2020-01-19 | 2020-12-01 | 中国石油天然气股份有限公司 | Negative pressure type oil-gas mixed pumping pump capable of being matched with blowout prevention oil drain device |
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