CN111155955A - Negative-pressure oil-gas mixed pumping pump capable of being matched with blowout-prevention oil drainer and method - Google Patents
Negative-pressure oil-gas mixed pumping pump capable of being matched with blowout-prevention oil drainer and method Download PDFInfo
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- CN111155955A CN111155955A CN202010061225.3A CN202010061225A CN111155955A CN 111155955 A CN111155955 A CN 111155955A CN 202010061225 A CN202010061225 A CN 202010061225A CN 111155955 A CN111155955 A CN 111155955A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005086 pumping Methods 0.000 title claims description 28
- 239000010985 leather Substances 0.000 claims abstract description 30
- 230000008878 coupling Effects 0.000 claims abstract description 29
- 238000010168 coupling process Methods 0.000 claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 claims abstract description 29
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 47
- 238000007789 sealing Methods 0.000 claims description 30
- 238000012856 packing Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 230000002265 prevention Effects 0.000 abstract description 28
- 239000003129 oil well Substances 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 description 9
- 210000002445 nipple Anatomy 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- 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
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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
- 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
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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
- E21B34/14—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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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Reciprocating Pumps (AREA)
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Abstract
The invention belongs to the technical field of gas prevention and associated gas recovery of a shaft of an oil well in an oil field, and particularly relates to a negative pressure type oil-gas mixed pump capable of being matched with a blowout prevention oil drain device and a method. The invention is composed of a sucker rod coupling, a pull rod, a press cap, an air-tight slide valve, an air-tight valve cover, an air-tight valve seat, a central tube, a one-way leather cup, a seat seal short section, 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 oil well down-hole associated gas and solves the problem that the oil gas mixing pump with the negative pressure function cannot open the blowout prevention oil drain device and is matched with the common impact type oil drain device to cause the down-hole blowout prevention.
Description
Technical Field
The invention belongs to the technical field of gas prevention and associated gas recovery of a shaft of an oil well in an oil field, and particularly relates to a negative pressure type oil-gas mixed pump capable of being matched with a blowout prevention oil drain device and a method.
Background
At present, many oil field associated gas resources are rich, and the oil well is subjected to casing emptying at the earlier stage, so that huge waste of resources is caused. At present, 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 gas recovery of a high-back-pressure oil well casing, the underground oil-gas mixed pump can effectively recover 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 mixed pumping pump adopts a negative pressure exhaust principle, the upper end of the pump is provided with the gas-proof slide valve, the gas-proof slide valve needs to be limited and fixed after being impacted by the tie of the pull rod after going into the well, the pull rod cannot move down after being fixed, the lower end of the plunger cannot accurately impact the blowout-preventing oil drain device due to the plunger connected with the lower end of the pull rod, and the blowout-preventing oil drain device cannot effectively open a channel.
Disclosure of Invention
The invention provides a negative-pressure oil-gas mixed pumping pump capable of being matched with a blowout-preventing oil drainer and a method thereof, and aims to provide the negative-pressure oil-gas mixed pumping pump and the method thereof, which can effectively prevent blowout, open the blowout-preventing oil drainer, complete the seat sealing of a slide valve and have no influence on the normal work of the mixed pumping pump.
In order to achieve the purpose, the invention adopts the technical scheme that:
a negative pressure type oil-gas mixed pump capable of being matched with a blowout prevention oil drainer comprises a sucker rod coupling, a pull rod, a pressing cap, an air-proof sliding valve, an air-proof valve cover, an air-proof valve seat, a central pipe, a one-way leather cup, a seat seal short section, a clamping tooth, an unsealing cap, a clamping groove, a plunger, a traveling valve, a pump barrel coupling and a pump barrel; the sucker rod coupling is connected with the end head at one end of the pull rod; the pressure cap is connected with one end of the air-proof valve cover; the air-proof sliding valve is sleeved on the pull rod and is arranged in the air-proof valve cover, and a gap is formed between the air-proof sliding valve and the pull rod and is seated on the air-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 seal short joint is connected with the other end of the central pipe; the unidirectional packing cup is fixedly connected to the outer wall of the central pipe, and the outer diameter of the unidirectional packing cup is in interference fit with the inner diameter of the setting short section; the clamping teeth are connected with the central pipe and contact with the inner wall of the seat seal short section; 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 short section, and the other end of the pump cylinder tie hoop is connected with the pump cylinder.
The clearance between the air-proof slide valve and the pull rod is not more than 2 mm.
The connection between the sucker rod coupling and the pull rod, between the pressing cap and the air-proof valve cover, between the central tube and the air-proof valve cover, between the clamping teeth and the central tube, between the seat short section and the central tube, between the plunger and the pull rod, between the deblocking cap and the pull rod, and between the traveling valve and the plunger is realized in a threaded connection mode.
The up-down moving distance of the air-proof slide valve is 55-65 mm.
The one-way leather cup is in an umbrella shape, and the opening of the one-way leather cup faces the sucker rod coupling; the one-way leather cups are provided with a plurality of one-way leather cups, and the whole one-way leather cups are subjected to thermal processing and then are fixed on the outer wall of the central pipe.
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.
And a clamping groove is formed in the inner wall of the seat seal short section, and the depth of the clamping groove is the same as the thickness of the clamping teeth.
An oil pumping method for a negative pressure type oil-gas mixed pump capable of being matched with an anti-blowout oil drainer comprises the following steps
The method comprises the following steps: connection of devices
Connecting a blowout-preventing oil drainer and a fixed valve below a negative-pressure oil-gas mixed pump which can be matched with the blowout-preventing oil drainer;
step two: go into the well
In the process of going down the well, the blowout-preventing oil drainer is closed, the sucker rod is connected with a sucker rod coupling when going down the well, the sucker rod pushes the plunger to go down the well to the end, the clamping tooth enters the seat seal short section, the clamping tooth is supported on the inner wall of the seat seal short section, the sucker rod coupling presses down the press cap, the press cap drives the clamping tooth to go down, when the sucker rod reaches the clamping groove, the clamping tooth is propped and fixed in the clamping groove, at the moment, the weight of all the sucker rods is pressed on the press cap and is transmitted to the clamping tooth, the clamping tooth is downwards chamfered due to the downward arrangement of the clamping tooth, the clamping tooth is pushed to go down over the;
step three: lifting pumping rod
Lifting the sucker rod after the step two is finished, enabling the plunger and the unsealing cap to move upwards, enabling the unsealing cap to push the lower part of the central tube upwards to drive the clamping teeth to move upwards, enabling the clamping teeth to reach the clamping groove of the seat seal short section to automatically open by utilizing elasticity and to be fixedly fastened with the clamping groove, and at the moment, no lifting is carried out after resistance is met, seat seal is finished, and anti-impact distance production is adjusted;
step four: downstroke
The air-proof sliding valve is closed, the upper liquid acts on the air-proof sliding valve, the one-way leather cup is stretched under the pressure of a small amount of upper liquid to form sealing, the liquid is prevented from descending, the plunger piston descends, no liquid exists in the pump cylinder, a negative pressure space is formed, and the liquid and the gas in the pump cylinder enter the plunger piston under the action of negative pressure;
step five: upstroke
After the fourth step, the plunger moves upwards to drive the liquid above the plunger to jack the gas-proof slide valve, the liquid and the gas are discharged, and the fourth step is returned;
step six: recovery device
After the oil pumping is finished, the negative pressure type oil-gas mixed pumping pump of the blowout-preventing oil drainer stops working, and the device is lifted and retracted to finish the whole oil pumping process.
Has the advantages that:
(1) the pump barrel is connected with the blowout-preventing oil drain device and the fixed valve in a downward connection mode, and the blowout-preventing oil drain device and the fixed valve are operated conventionally, so that the action process is not explained in detail. In the process that the plunger is driven to go down to the bottom, under the pushing of the mechanical force of the pull rod, the plunger pushes the blowout prevention mechanism of the blowout prevention oil drain down after going to the bottom, and an oil flow channel is effectively opened.
(2) After the sealing short section is opened, the plunger is lifted upwards, the unsealing cap is used for jacking the central pipe, the clamping teeth go upwards and reach the clamping groove of the sealing short section to be automatically opened by utilizing elasticity, and the sealing short section is fixedly fastened with the clamping groove.
(3) After the valve is fixed, the valve is normally produced, in the down stroke process, the upper liquid column of the pump acts on the air-proof slide valve, a vacuum negative pressure cavity is formed in the pump cylinder, the floating valve is opened under the action of negative pressure, and gas and liquid are promoted to easily enter the pump. The one-way leather cup is stretched under the pressure of a small amount of liquid at the upper part to form sealing, so that the liquid is prevented from descending; during the up stroke, the liquid and gas in the upper part of the plunger push open the gas-proof slide valve to discharge from the pump barrel. The generated negative pressure is used for enhancing the air collecting and exhausting capacity of the pump.
(4) The invention can be matched with a blowout prevention oil drain device in the well descending operation, achieves the purposes of blowout prevention in the well descending process and safe production by opening the liquid inlet channel after the well descending process is finished, can realize negative pressure production and enhances the exhaust capacity.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and 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 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-sucker rod coupling; 2-a pull rod; 3, pressing a cap; 4-gas-tight slide valve; 5-air-tight valve cover; 6-gas-proof valve seat; 7-a central tube; 8-one-way leather cup; 9-setting a short joint; 10-clamping teeth; 11-unsealing the cap; 12-a card slot; 13-a plunger; 14-traveling valve; 15-pump barrel collar; 16-pump cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
according to the negative pressure type oil-gas mixing pump which can be matched with the blowout prevention oil drain device and is shown in the figure 1, the negative pressure type oil-gas mixing pump comprises a sucker rod coupling 1, a pull rod 2, a pressing cap 3, an air-proof sliding valve 4, an air-proof valve cover 5, an air-proof valve seat 6, a central pipe 7, a one-way leather cup 8, a seat seal short section 9, a clamping tooth 10, an unsealing 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 with the end head of one end of the pull rod 2; the pressing cap 3 is connected with one end of the air-proof valve cover 5; the air-proof slide valve 4 is sleeved on the pull rod 2 and is arranged in the air-proof valve cover 5, and a gap is arranged between the air-proof slide valve 4 and the pull rod 2 and is seated on the air-proof valve seat 6; the central pipe 7 is sleeved outside the pull rod 2, and one end of the central pipe 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 setting nipple 9 is connected with the other end of the central tube 7; the unidirectional packing cup 8 is fixedly connected to the outer wall of the central tube 7, and the outer diameter of the unidirectional packing cup 8 is in interference fit with the inner diameter of the setting nipple 9; the clamping teeth 10 are connected with the central pipe 7 and the inner wall of the setting short section 9 is contacted; the unsealing 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 15 is connected with the setting nipple 9, and the other end of the pump cylinder tie 15 is connected with the pump cylinder 16.
When the oil pumping device is in actual use, the blowout-preventing oil drainer and the fixed valve are connected below the negative-pressure oil-gas mixed pump which can be matched with the blowout-preventing oil drainer, and then the oil pumping device is put into a well. In the process of going into the well, blowout prevention bleeder is closed, the sucker rod is connected with sucker rod coupling 1 when going into the well, the sucker rod pushes plunger 13 to go into the well to the end, the clamping tooth 10 enters the setting nipple 9 and is supported on the inner wall of the setting nipple 9 by means of self elasticity, the sucker rod coupling 1 presses down the pressing cap 3, the pressing cap 3 drives the clamping tooth 10 to go down, when the sucker rod reaches the clamping groove 12, the clamping tooth 10 is spread 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 transmitted to the clamping tooth 10, because the clamping tooth 10 has a chamfer downwards, the clamping tooth 10 is pushed to go down over the clamping groove 12 under the action of the weight, the blowout prevention mechanism of the blowout prevention bleeder is pushed away after. After the oil flow channel is opened, the sucker rod is lifted upwards, the plunger 13 and the unsealing cap 11 move upwards along with the oil flow channel, the unsealing cap 11 pushes the lower portion of the central tube 7 upwards to drive the clamping teeth 10 to move upwards, the clamping groove 12 reaching the setting short section 9 is automatically opened by using elasticity and is fixedly fastened with the clamping groove 12, the sucker rod is not lifted upwards after meeting resistance, the setting is completed, and the anti-impact distance is adjusted to carry out normal production. During the down stroke, the air-proof slide valve 4 is closed, the upper liquid acts on the air-proof slide valve 4, the one-way leather cup 8 is expanded under the pressure of the upper liquid to form sealing, the liquid is prevented from descending, the plunger 13 descends, no liquid exists in the pump barrel 16 to form a negative pressure space, and the liquid and the gas in the pump barrel 16 enter the plunger 13 under the action of the negative pressure; during the up stroke, the plunger 13 moves upwards to drive the liquid above the plunger 13 to jack the air-proof slide valve 4, the liquid and the air are discharged, and the oil pumping is completed by circulating the process. When the pipe column needs to be lifted, the negative pressure type oil-gas mixing pump stops working, and the device is lifted up to be lifted out of the shaft along with the oil pipe and the sucker rod.
The air-proof slide valve 4 is arranged in the air-proof valve cover 5, is sleeved on the pull rod 2, has a gap with the pull rod and is seated on the air-proof valve seat, and plays a role in one-way sealing. The outer diameter of the one-way packing cup 8 is in interference fit with the inner diameter of the setting short section 9 and is tightly attached to the surface of the one-way packing cup, so that a one-way sealing effect is achieved; the clamping teeth 10 are connected with the center 7 and cling to the inner wall of the seat seal short section 9 by means of self elasticity. The upward pushing of the plunger 13 is changed into the upward pushing of the unsealing cap 11, so that the plunger 13 is protected; a one-way packing cup 8 is used as a sealing mechanism and is in interference fit with the inner wall of the seat seal short section 9 to form sealing, the sealing mechanism can move up and down, and the sealing mechanism is matched to move up and down at a seat seal position. After normal production, the liquid above the pump acts on the one-way leather cup, and the leather cup is opened again to enhance the sealing property.
By adopting the technical scheme of the invention, the blowout prevention oil drain device can be effectively prevented, the blowout prevention oil drain device can be opened, the seat sealing of the slide valve can be completed, and the normal work of the mixed pumping pump is not influenced.
Example two:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drain device and is shown in the figure 1, the difference from the first embodiment is that: the clearance between the air-proof slide valve 4 and the pull rod 2 is not more than 2 mm.
In actual use, the air-tight 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 air-proof slide valve 4, and because the gap between the air-proof slide valve 4 and the pull rod 2 is very small, the upper liquid cannot flow into the pump barrel 16 in a large amount, a negative pressure space is generated in the pump barrel 16, and a large pressure difference is generated between the upper liquid and the bottom of the pump barrel 16, so that the gas-liquid mixture at the bottom of the pump barrel 16 enters the pump barrel 16 under the action of the pressure difference and is discharged out of the pump barrel 16 after the upper stroke plunger 13 is lifted, and the recovery rate of associated gas reaches over 85 percent.
Example three:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drain device and is shown in the figure 1, the difference from the first embodiment is that: the connection between the sucker rod coupling 1 and the pull rod 2, between the pressing cap 3 and the air-proof valve cover 5, between the central pipe 7 and the air-proof valve cover 5, between the clamping tooth 10 and the central pipe 7, between the setting short section 9 and the central pipe 7, between the plunger 13 and the pull rod 2, between the deblocking cap 11 and the pull rod 2, and between the traveling valve 14 and the plunger 13 all adopt a threaded connection mode.
In actual use, the connection between the sucker rod coupling 1 and the pull rod 2, between the pressing cap 3 and the air-proof valve cover 5, between the central pipe 7 and the air-proof valve cover 5, between the clamping teeth 10 and the central pipe 7, between the setting nipple 9 and the central pipe 7, between the plunger 13 and the pull rod 2, between the deblocking cap 11 and the pull rod 2, and between the traveling valve 14 and the plunger 13 are all in a threaded connection mode, so that the invention is convenient to maintain and install.
Example four:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drain device and is shown in the figure 1, the difference from the first embodiment is that: the up-down moving distance of the air-proof slide valve 4 is 55-65 mm.
When the air-proof slide valve is actually used, the up-down movement distance of the air-proof slide valve 4 is 55-65mm, if the up-down movement distance is more than 65mm, in actual operation, at the beginning stage of a down stroke, the air-proof slide valve cannot be timely and downwards seated on the air-proof valve seat 6, so that the sealing is not tight, liquid flows into the pump barrel 16, and the formation of negative pressure in the pump is influenced. The effect is best when the moving distance is 60mm, and the recovery rate of associated gas reaches more than 85%.
Example five:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drain device and is shown in the figure 1, the difference from the first embodiment is that: the one-way leather cup 8 is in an umbrella shape, and the opening of the one-way leather cup faces the sucker rod coupling 1; the one-way packing cups 8 are provided with a plurality of one-way packing cups 8, and the one-way packing cups 8 are integrally hot-processed and then fixed on the outer wall of the central tube 7.
Preferably, 3 unidirectional leather cups 8 are arranged.
In actual use, the one-way packing cup 8 is in an umbrella shape, the opening faces the sucker rod coupling 1, the outer diameter of the one-way packing cup is in interference fit with the inner diameter of the seat seal short section, and the one-way packing cup is tightly attached to the surface of the seat seal short section to play a one-way sealing role. The plurality of unidirectional packing cups 8 are integrally fixed on the outer wall of the central tube 7 after hot processing, so that the unidirectional sealing effect is better. The number of the unidirectional packing cups 8 is 3, so that a good sealing effect can be achieved, 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 one-way leather cup, and the leather cup is opened again to enhance the sealing property.
Example six:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drain device and is shown in the figure 1, the difference from the first 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.
In practical use, the clamping teeth 10 of the gas-tight slide valve seat sealing mechanism are designed to be provided with bidirectional chamfers, so that the seat sealing mechanism is pushed to move downwards by the weight of a rod column when reaching a seat sealing position, the plunger 13 is driven to move downwards to the bottom and then jacks up an oil inlet channel of the blowout prevention oil drain to produce, a central pipe 7 in the seat sealing mechanism can move upwards under the action of the upper top of the unsealing cap, the clamping teeth 10 are driven to move upwards to reach the clamping grooves and then are fixed in the clamping grooves by the aid of self elasticity, and the oil drain can be unsealed and forced to move upwards when a sucker rod works. The chamfer angle is 30-50 deg., and is best when the chamfer angle is 45 deg..
Example seven:
according to the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drain device and is shown in the figure 1, the difference from the first embodiment is that: and a clamping groove 12 is formed in the inner wall of the seat seal short section 9, and the depth of the clamping groove 12 is the same as the thickness of the clamping tooth 10.
When in actual use, the inner wall of the seat seal short section 9 is provided with a clamping groove 12, the depth of the clamping groove 12 is the same as the thickness of the clamping teeth 10, and the clamping teeth 10 can be guaranteed to be stably connected with the seat seal short section 9 when not working. When the latch 10 is operated, it is smoothly operated due to the presence of the chamfer.
Example eight:
according to the oil pumping method of the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drainer and is shown in the figure 1, the method comprises the following steps
The method comprises the following steps: connection of devices
Connecting a blowout-preventing oil drainer and a fixed valve below a negative-pressure oil-gas mixed pump which can be matched with the blowout-preventing oil drainer;
step two: go into the well
In the process of going down the well, the blowout-preventing oil drainer is closed, the sucker rod is connected with the sucker rod coupling 1 when going down the well, the sucker rod pushes the plunger 13 to go down the well to the end, the clamping tooth 10 enters the setting nipple 9, the clamping tooth 10 is supported on the inner wall of the setting nipple 9, the sucker rod coupling 1 presses the pressing cap 3 downwards, the pressing cap 3 drives the clamping tooth 10 to go downwards, when reaching the clamping groove 12, the clamping tooth 10 is spread 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 transmitted to the clamping tooth 10, because the clamping tooth 10 has a chamfer downwards, the clamping tooth 10 is pushed to go downwards through the clamping groove 12 under the action of the weight, until the plunger 13 is pushed back to open;
step three: lifting pumping rod
Lifting the sucker rod after the step two is finished, enabling the plunger 13 and the unsealing cap 11 to ascend, enabling the unsealing cap 11 to push the lower part of the central tube 7 upwards, driving the clamping teeth 10 to ascend, enabling the lower part of the central tube to reach the clamping groove 12 of the setting nipple 9 to automatically open by using elasticity and be fixedly fastened with the clamping groove 12, stopping lifting after resistance is met, finishing setting, and adjusting the anti-impact distance;
step four: downstroke
The air-proof slide valve 4 is closed, the upper liquid acts on the air-proof slide valve 4, the one-way leather cup 8 is spread under the pressure of a small amount of upper liquid to form sealing, the liquid is prevented from descending, the plunger 13 descends, no liquid exists in the pump barrel 16, a negative pressure space is formed, and under the action of negative pressure, the liquid and the gas in the pump barrel 16 enter the plunger 13;
step five: upstroke
After the fourth step, the plunger 13 moves upwards to drive the liquid above the plunger 13 to jack the air-tight slide valve 4, the liquid and the air are discharged, and the fourth step is returned;
step six: recovery device
After the oil pumping is finished, the negative pressure type oil-gas mixed pumping pump of the blowout-preventing oil drainer stops working, and the device is lifted and retracted to finish the whole oil pumping process.
In practical use, the pump barrel is connected with the blowout-preventing oil drain and the fixed valve in a downward mode, then the oil is discharged into the well, the plunger 13 moves downward to penetrate the bottom and then jacks a blowout-preventing mechanism of the blowout-preventing oil drain under the pushing of the mechanical force of the pull rod in the process that the plunger 13 is discharged into the bottom, and an oil flow channel is effectively opened. And lifting the plunger piston after the oil flow is opened, pushing the central tube 7 upwards by using the unsealing cap 11, enabling the clamping teeth to go upwards, and automatically opening the clamping groove of the seat seal short section by using elasticity to be fixedly fastened with the clamping groove. After the oil pumping device is fixed, the oil pumping device is normally produced, in the down stroke process, the negative pressure type oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer acts on the gas-preventing slide valve 4 through the upper liquid column, a vacuum negative pressure cavity is formed in the pump barrel 16, the floating 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 capable of being matched with the blowout-preventing oil drainer. The one-way leather cup 8 is stretched under the pressure of a small amount of liquid at the upper part to form sealing, so that the liquid is prevented from descending; the liquid and gas above the plunger 13 during the upstroke push open the gas slide valve 4 out of the cylinder 16. The generated negative pressure is utilized to enhance the gas receiving and exhausting capacity of the negative pressure type oil-gas mixed pump which can be matched with the blowout prevention oil drain.
The invention can be matched with a blowout prevention oil drain device in the well descending operation, achieves the purposes of blowout prevention in the well descending process and safe production by opening the liquid inlet channel after the well descending process is finished, can realize negative pressure production and enhances the exhaust capacity.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not 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 change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a can form a complete set use negative pressure formula oil gas that prevents spouting bleeder thoughtlessly pumps which characterized in that: the oil pumping rod sealing device comprises a sucker rod coupling (1), a pull rod (2), a pressing cap (3), an air-proof sliding valve (4), an air-proof valve cover (5), an air-proof valve seat (6), a central pipe (7), a one-way packing cup (8), a seat sealing short section (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 with the end head at one end of the pull rod (2); the pressure cap (3) is connected with one end of the air-proof valve cover (5); the air-proof sliding valve (4) is sleeved on the pull rod (2) and is arranged in the air-proof valve cover (5), and a gap is formed between the air-proof sliding valve (4) and the pull rod (2) and is seated on the air-proof valve seat (6); the central pipe (7) is sleeved outside the pull rod (2), and one end of the central pipe (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 setting short joint (9) is connected with the other end of the central pipe (7); the unidirectional packing cup (8) is fixedly connected to the outer wall of the central tube (7), and the outer diameter of the unidirectional packing cup (8) is in interference fit with the inner diameter of the setting short section (9); the clamping teeth (10) are connected with the central pipe (7) and the inner wall of the setting short section (9) is contacted; the unsealing 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 (15) is connected with the seat seal short section (9), and the other end of the pump cylinder tie (15) is connected with the pump cylinder (16).
2. The negative-pressure oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 1, characterized in that: the clearance between the air-proof sliding valve (4) and the pull rod (2) is not more than 2 mm.
3. The negative-pressure oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 1, characterized in that: the sucker rod coupling is characterized in that connection between the sucker rod coupling (1) and the pull rod (2), between the pressure cap (3) and the air-proof valve cover (5), between the central pipe (7) and the air-proof valve cover (5), between the clamping teeth (10) and the central pipe (7), between the seat sealing short section (9) and the central pipe (7), between the plunger (13) and the pull rod (2), between the deblocking cap (11) and the pull rod (2) and between the traveling valve (14) and the plunger (13) is realized in a threaded connection mode.
4. The negative-pressure oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 1, characterized in that: the up-down moving distance of the air-proof slide valve (4) is 55-65 mm.
5. The negative-pressure oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 1, characterized in that: the one-way leather cup (8) is in an umbrella shape, and the opening of the one-way leather cup faces the sucker rod coupling (1); the one-way leather cups (8) are provided with a plurality of one-way leather cups, and the one-way leather cups (8) are integrally hot-processed and then fixed on the outer wall of the central tube (7).
6. The negative-pressure oil-gas mixing pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 5, characterized in that: the number of the unidirectional leather cups (8) is 3.
7. The negative-pressure oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 1, characterized in that: two sides of the clamping tooth (10) body are provided with two-way chamfers, and the chamfers are 30-50 degrees.
8. The negative-pressure oil-gas mixing pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 7, characterized in that: the chamfer angle of the clamping tooth (10) body is 45 degrees.
9. The negative-pressure oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer as claimed in claim 1, characterized in that: and a clamping groove (12) is formed in the inner wall of the seat seal short section (9), and the depth of the clamping groove (12) is the same as the thickness of the clamping tooth (10).
10. The oil pumping method of the negative pressure type oil-gas mixed pump capable of being matched with the blowout-preventing oil drainer according to any one of claims 1 to 9, characterized by comprising the following steps
The method comprises the following steps: connection of devices
Connecting a blowout-preventing oil drainer and a fixed valve below a negative-pressure oil-gas mixed pump which can be matched with the blowout-preventing oil drainer;
step two: go into the well
In the process of going down the well, the blowout-preventing oil drainer is closed, the sucker rod is connected with the sucker rod coupling (1) when going down the well, the sucker rod pushes the plunger (13) to go down the well to the end, the clamping tooth (10) enters the seat seal short section (9), the clamping tooth (10) is supported on the inner wall of the seat seal short section (9), the sucker rod coupling (1) presses the press cap (3) downwards, the press cap (3) drives the clamping tooth (10) to go downwards, when the sucker rod reaches the clamping groove (12), the clamping tooth is supported and fixed in the clamping groove (12), at the moment, all the weight of the sucker rod is pressed on the press cap (3) and is transmitted to the clamping tooth (10), as the clamping tooth (10) has a chamfer downwards, the clamping tooth (10) is pushed to go downwards over the clamping groove (12) under the action of the weight until the plunger (13);
step three: lifting pumping rod
Lifting the sucker rod after the step two is finished, enabling the plunger (13) and the unsealing cap (11) to ascend, enabling the unsealing cap (11) to push the lower part of the central tube (7) upwards to drive the clamping teeth (10) to ascend, enabling the central tube to reach a clamping groove (12) of the seat seal short section (9) and automatically open by utilizing elasticity, fixing and fastening the central tube with the clamping groove (12), stopping lifting after resistance is met, finishing seat seal, and adjusting anti-impact distance for production;
step four: downstroke
The air-proof sliding valve (4) is closed, the upper liquid acts on the air-proof sliding valve (4), the one-way leather cup (8) is stretched under the pressure of a small amount of upper liquid to form sealing, 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 the gas in the pump cylinder (16) enter the plunger (13) under the action of negative pressure;
step five: upstroke
After the fourth step is finished, the plunger (13) moves upwards to drive the liquid above the plunger (13) to jack the air-tight slide valve (4), the liquid and the air are discharged, and the fourth step is returned;
step six: recovery device
After the oil pumping is finished, the negative pressure type oil-gas mixed pumping pump of the blowout-preventing oil drainer stops working, and the device is lifted and retracted to finish the whole oil pumping process.
Priority Applications (1)
| 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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| 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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| CN111155955A true CN111155955A (en) | 2020-05-15 |
| CN111155955B CN111155955B (en) | 2024-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115749701A (en) * | 2022-12-06 | 2023-03-07 | 山东威马泵业股份有限公司 | Blowout-preventing pipe type oil well pump |
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| CN111155955B (en) | 2024-05-28 |
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