CN109707605B - Improved device based on gas well pressure self-pumping pump - Google Patents
Improved device based on gas well pressure self-pumping pump Download PDFInfo
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- CN109707605B CN109707605B CN201811388715.3A CN201811388715A CN109707605B CN 109707605 B CN109707605 B CN 109707605B CN 201811388715 A CN201811388715 A CN 201811388715A CN 109707605 B CN109707605 B CN 109707605B
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Abstract
本发明公开了一种基于气井压力自抽泵的改进装置，应用于天然气开采领域，本发明利用气井积液处的天然气通过第一流体通道，给动力活塞提供抽动的动力，从而带动抽液活塞进行抽液工作；本发明设计了巧妙的换向装置，能够利用天然气的动力驱动动力活塞往返运动；除此之外，本发明还设计了下浮球液位开关，使得自抽泵能够在气井积液较少的情况下自动停止工作；使用本发明装置，可以在无需外界动力驱动的情况下，利用天然气的动力进行抽取气井积液的工作，而现有技术则未有利用天然气动力抽取气井积液的装置，因此本发明更加节能。
The invention discloses an improved device based on a gas well pressure self-pumping pump, which is applied to the field of natural gas exploitation. The invention utilizes the natural gas at the gas well accumulating liquid to pass through a first fluid channel to provide the power piston with pumping power, thereby driving the liquid pumping piston Carry out the liquid pumping work; the invention designs an ingenious reversing device, which can use the power of natural gas to drive the power piston to move back and forth; in addition, the invention also designs a lower floating ball liquid level switch, so that the self-pumping pump can accumulate in the gas well. When the liquid is less, it automatically stops working; using the device of the present invention, the power of natural gas can be used to extract liquid from gas wells without external power driving, while the prior art does not use natural gas power to extract gas wells. Therefore, the present invention is more energy-saving.
Description
Technical Field
The invention relates to a pump for exploiting natural gas, in particular to an improved device for a self-pumping pump based on gas well pressure.
Background
When natural gas is produced, part of components in the natural gas are condensed in a shaft to form condensate liquid in the later production period of a gas well used for production and deep into the ground bottom due to the fact that formation pressure, gas well productivity are reduced, shaft temperature gradient is increased, temperature is reduced and the like, and when the gas well gas production rate is not enough to bring out the part of condensate liquid, the condensate liquid falls back to the bottom of the well to generate gas well liquid. The accumulation of gas well liquid will increase the back pressure on the gas formation and limit the production capacity of the well, and therefore need to be pumped out. When the pump body is used for pumping accumulated liquid of the gas well, natural gas can provide rising power, but few devices in the prior art utilize the power.
Disclosure of Invention
The invention aims to provide an improved device based on a gas well pressure self-pumping pump, which can pump accumulated liquid of a gas well out of the ground by using a power driving device of natural gas and can automatically stop working when the liquid level is too low by designing the improved device.
In order to achieve the purpose, the invention adopts the following technical scheme:
an improved device based on a gas well pressure self-pumping pump comprises a hollow columnar reversing valve body, wherein a plurality of power cylinder barrels which are arranged along the axial direction and are mutually isolated are arranged above the reversing valve body, and each power cylinder barrel is internally provided with a power piston; each power piston divides each power cylinder into a power upper chamber and a power lower chamber;
a liquid pumping cylinder barrel is arranged below the reversing valve body, and a liquid pumping piston is arranged in the liquid pumping cylinder barrel; the liquid pumping cylinder barrel is divided into a liquid pumping upper chamber and a liquid pumping lower chamber by the liquid pumping piston;
the middle part of the reversing valve body penetrates through a hollow piston rod which is communicated with each power piston and each liquid pumping piston; the top end of the piston rod penetrates through the power cylinder barrel positioned at the uppermost part, and the bottom end of the piston rod is connected with the liquid pumping piston; a communicating channel is arranged between the upper liquid pumping cavity and the hollow area of the piston rod; the liquid pumping lower chamber is communicated with the hollow area of the piston rod in a one-way mode through a first one-way valve;
the inner wall of the reversing valve body is tightly attached with a slide valve which can move axially; the inner wall of the reversing valve body is also vertically embedded with a first spring, a second spring, a first bolt and a second bolt which are respectively connected with the first spring and the second spring and face to the central axis of the reversing valve body; the side wall of the slide valve is provided with a first bolt hole and a second bolt hole which are communicated, a first auxiliary bolt and a second auxiliary bolt are embedded in the first bolt hole and the second bolt hole, and the lengths of the first auxiliary bolt and the second auxiliary bolt are respectively and correspondingly the same as the depths of the first bolt hole and the second bolt hole;
when the slide valve moves to the upper dead point, the second bolt is inserted into the second bolt hole under the action of elastic force so as to fix the slide valve, and the second auxiliary bolt is partially moved out of the second bolt hole; when the slide valve moves to the lower dead point, the first bolt is inserted into the first bolt hole under the action of elastic force so as to fix the slide valve, and the first auxiliary bolt is partially moved out of the first bolt hole;
the inner wall of the slide valve is tightly attached with a valve signal pipe which can move axially, and a pressing spring is embedded in the contact surface of the valve signal pipe and the slide valve, so that the valve signal pipe can apply axial dragging force to the slide valve through the pressing spring;
when the valve fuse tube moves to the top dead center, the valve fuse tube pushes the first auxiliary bolt to be completely embedded into the first bolt hole, the first auxiliary bolt pushes the first bolt to release the fixation of the slide valve, and meanwhile, the slide valve moves to the top dead center under the action of the compression spring;
when the valve letter tube moves to the bottom dead center, the valve letter tube pushes the second auxiliary bolt to be completely embedded into the second bolt hole, the second auxiliary bolt pushes the second bolt to release the fixation of the slide valve, and meanwhile, the slide valve moves to the bottom dead center under the action of the compression spring;
the side wall of the reversing valve body is provided with auxiliary upper channel holes, a first channel hole, a second channel hole, a third channel hole and auxiliary lower channel holes at equal intervals from top to bottom along the axial direction, and the auxiliary upper channel holes penetrate through the side wall; the first channel hole is communicated with the power lower chamber through a pipeline; the third channel hole is communicated with the power upper cavity through a pipeline; the second channel hole is connected with a fluid input pipeline providing self-pumping power;
a first groove and a second groove are formed in the outer wall of the sliding valve from top to bottom along the axial direction;
when the slide valve moves to the upper stop point, the auxiliary upper channel hole is communicated with the first channel hole through the first groove, and the second channel hole is communicated with the third channel hole through the second groove; when the slide valve moves to the bottom dead center, the first channel hole is communicated with the second channel hole through the first groove, and the third channel hole is communicated with the auxiliary lower channel hole through the second groove;
when the liquid pumping piston moves to the top dead center, the valve communication pipe is pushed by the liquid pumping piston to move to the top dead center; when the power piston moves to the lower dead point, the valve signal pipe is pushed by the power piston to move to the lower dead point;
an isolating body is arranged around the liquid pumping cylinder and is close to the reversing valve body, and the outer diameter of the isolating body is larger than that of the reversing valve body; a first fluid channel and a second fluid channel which are communicated with the two sides of the isolating body are respectively arranged in the isolating body, the first fluid channel is connected with a fluid input pipeline, and the second fluid channel is controlled to circulate or be closed through a lower floating ball liquid level switch positioned below the isolating body.
Preferably, three power cylinders are provided.
Preferably, the top of the piston rod is connected with an oil pipe.
Preferably, a gas collecting pipe with openings at two ends is further arranged around the device, the gas collecting pipe is connected with the isolated body in a sealing mode, and a sleeve is further sleeved outside the gas collecting pipe.
Preferably, the bottom of the liquid pumping lower chamber is communicated with the outside through a second one-way valve.
Preferably, a third fluid channel communicated with two sides of the isolating body is further formed in the isolating body, and the third fluid channel is controlled to circulate or be closed through a floating ball liquid level switch located above the isolating body.
The self-pumping pump has the advantages that external power is not required to be utilized, and the power can be provided for the self-pumping pump only through the lifting force of natural gas; and through the ingenious design of the reversing device, the unidirectional lifting force of the natural gas can be converted into power of the piston in different directions, so that the piston can move up and down repeatedly to draw liquid. In addition, through the design of the lower floating ball liquid level switch, the self-pumping pump can automatically stop working under the condition of less accumulated liquid of the gas well without manual operation and control, and is very convenient.
Drawings
FIGS. 1, 2 and 3 are exploded views of the apparatus of the present invention when the slide valve moves to the bottom dead center, wherein FIG. 1 is an upper portion, FIG. 2 is a middle portion, and FIG. 3 is a lower portion;
FIG. 4 is a schematic view of the reversing valve body when the spool valve is moved to top dead center.
In the drawings, 1, a direction change valve body, 11, a slide valve, 12, a valve manifold, 13, a hold-down spring, 141, a first spring, 142, a second spring, 151, a first pin, 152, a second pin, 161, a first auxiliary pin, 162, a second auxiliary pin, 171, a first passage hole, 172, a second passage hole, 173, a third passage hole, 174, an auxiliary upper passage hole, 175, an auxiliary lower passage hole, 181, a first groove, 182, a second groove, 2, a power cylinder, 21, a power upper chamber, 22, a power lower chamber, 23, a power piston, 3, a pumping cylinder, 31, a pumping upper chamber, 32, a pumping lower chamber, 33, a pumping piston, 41, a power lower chamber pipe, 42, a fluid input pipe, 43, a power upper chamber pipe, 5, an isolator, 51, a first fluid passage, 52, a second fluid passage, 53, a third fluid passage, 62, a lower ball level switch, 63. the gas well liquid level control device comprises a floating ball liquid level switch, 7, a piston rod, 71, a hollow area, 81, a first one-way valve, 82, a second one-way valve, 9, an oil pipe, 91, a liquid discharge port, 101, gas well accumulated liquid, 102, a natural gas discharge port, 103, a gas collecting pipe, 104 and a sleeve.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Since the device diagram of the present invention is large and some fine content is involved therein, the overall diagram of the device is broken down into fig. 1, 2 and 3, which represent the upper, middle and lower parts of the device, respectively; in order to show that the three images are part of an integral image, the three images are overlapped at a splicing part at a small part. Fig. 1, 2 and 3 show the device when the slide valve 11 moves to the bottom dead center, and fig. 4 is also provided to show the situation when the slide valve 11 moves to the top dead center, but fig. 4 only shows the situation of the reversing valve body 1 in a highlight way, because other parts are the same as the three figures. This is described next in connection with these four figures.
The present invention is directed to pumping gas well liquid 101 out of the ground. The scheme is that natural gas at the gas well accumulated liquid 101 passes through the first fluid channel 51 to provide pumping power for the power piston 23, so that the pumping piston 33 is driven to pump the gas well accumulated liquid 101 from the hollow area 71 of the piston rod 7 to the oil pipe 9. The invention focuses on how to use the power of natural gas to drive the power piston 23, especially to make it reciprocate.
The various components of the device are described next. The device comprises a hollow columnar reversing valve body 1, a plurality of power cylinder barrels 2 which are arranged along the axial direction and are mutually isolated are arranged above the reversing valve body 1, and a power piston 23 is arranged in each power cylinder barrel 2;
each power piston 23 divides each power cylinder 2 into a power upper chamber 21 and a power lower chamber 22, if natural gas enters the power upper chamber 21, downward power is provided for the power piston 23, and if natural gas enters the power lower chamber 22, upward power is provided for the power piston 23, which is actually a reversing mode, and what we will say will be done in detail later; in addition, it can be seen here that the reason for providing a plurality of power cylinders 2 is that, because the power for the natural gas to rise is limited, a plurality of power cylinders 2 can provide more power. It can be seen that 3 power cylinders 2 are preferred.
In addition to the power cylinder 2 as the power, there is a pumping cylinder 3 functioning as the pumping function; as can be seen from the figure, a liquid pumping cylinder 3 is arranged below the reversing valve body 1, and a liquid pumping piston 33 is arranged in the liquid pumping cylinder 3; the liquid pumping piston 33 divides the liquid pumping cylinder barrel 3 into a liquid pumping upper chamber 31 and a liquid pumping lower chamber 32; in principle, only one tapping cylinder 3 may be provided.
The invention utilizes a hollow piston rod 7, and the piston rod 7 passes through the middle part of the reversing valve body 1 and is communicated with each power piston 23 and the liquid pumping piston 33; the top end of the piston rod 7 penetrates through the power cylinder 2 positioned at the uppermost part and is connected with an oil pipe 9, so that the liquid can be finally conveyed to the position; the bottom end of the piston rod 7 is connected to the pumping piston 33, and the lower pumping chamber 32 is in one-way communication with the hollow area 71 of the piston rod 7 through the first check valve 81, so that the liquid in the lower pumping chamber 32 can be communicated to the hollow area 71; the bottom of the lower pumping chamber 32 is further connected with a second check valve 82 which is in one-way communication with the outside (actually, the gas well accumulated liquid 101), so that the accumulated liquid in the gas well accumulated liquid 101 can be pumped into the lower pumping chamber 32.
In addition, a communication channel is provided between the upper pumping chamber 31 and the hollow area 71 of the piston rod 7, in order to allow the liquid accumulation in the gas well liquid accumulation 101 to enter the chamber, so that the pumping piston 33 can move (so that no vacuum needs to be drawn).
The problem of commutation is explained next.
The inner wall of the reversing valve body 1 is closely provided with a slide valve 11 which can move axially; the inner wall of the reversing valve body 1 is also vertically embedded with a first spring 141, a second spring 142, a first bolt 151 and a second bolt 152 which are respectively connected with the first spring 141 and the second spring 142 and face to the central axis of the reversing valve body 1;
a first bolt hole and a second bolt hole which are communicated are formed in the side wall of the slide valve 11, a first auxiliary bolt 161 and a second auxiliary bolt 162 are embedded in the first bolt hole and the second bolt hole, and the lengths of the first auxiliary bolt 161 and the second auxiliary bolt 162 are respectively and correspondingly the same as the depths of the first bolt hole and the second bolt hole;
when the spool 11 moves to the top dead center, the second pin 152 is inserted into the second pin 152 hole by the elastic force to fix the spool 11, and the second pin 152 pushes the second auxiliary pin 162 to be partially moved out of the second pin hole ("partially moved out" can be done by the proper setting of the elastic force of the second spring 142); when the spool 11 moves to the bottom dead center, the first pin 151 is inserted into the first pin hole by an elastic force to fix the spool 11, and the first auxiliary pin 161 is partially moved out of the first pin hole;
the inner wall of the slide valve 11 is closely provided with a valve sleeve 12 capable of moving axially, and a pressing spring 13 is embedded in the contact surface of the valve sleeve 12 and the slide valve 11, so that the valve sleeve 12 can apply axial dragging force to the slide valve 11 through the pressing spring 13;
when the valve housing 12 moves to the top dead center, the valve housing 12 pushes the first auxiliary latch 161 to be completely inserted into the first latch hole, the first auxiliary latch 161 pushes the first latch 151 to release the fixing of the spool 11, and the spool 11 moves to the top dead center by the pressing spring 13, at which time the spool is fixed by the second latch 152.
When the valve housing 12 moves to the bottom dead center, the valve housing 12 pushes the second auxiliary pin 162 to be completely inserted into the second pin hole, the second auxiliary pin 162 pushes the second pin 152 to release the fixing of the slide valve 11, and the slide valve 11 moves to the bottom dead center under the action of the compression spring 13, and is fixed by the first pin 151;
the side wall of the reversing valve body 1 is provided with auxiliary upper channel holes 174, a first channel hole 171, a second channel hole 172, a third channel hole 173 and auxiliary lower channel holes 175 at equal intervals from top to bottom along the axial direction; the first passage hole 171 communicates with the lower power chamber 22 through a pipe (lower power chamber pipe 41 in the figure); the third passage hole 173 communicates with the dynamic upper chamber 21 through a pipe (dynamic upper chamber pipe 43 in the figure); the second passage hole 172 is connected to the fluid input line 42 (which is for natural gas flow) that provides self-pumping power; as for the auxiliary upper passage hole 174 and the auxiliary lower passage hole 175, it can be seen that they are provided in two, respectively, and in fact they are provided in one, because they are communicated with the outside, and their functions will be described later.
A first groove 181 and a second groove 182 are formed on the outer wall of the slide valve 11 from top to bottom along the axial direction, and if referring to the drawings, the first groove 181 and the second groove 182 both have symmetrical grooves with respect to the central axis, but actually, the two symmetrical grooves are communicated with each other, or the first groove 181 and the second groove 182 are actually annular grooves, and only in the sectional view, each groove presents two symmetrical grooves;
when the spool 11 moves to the top dead center, the auxiliary upper passage hole 174 communicates with the first passage hole 171 through the first groove 181, and the second passage hole 172 communicates with the third passage hole 173 through the second groove 182; when the spool 11 moves to the bottom dead center, the first passage hole 171 communicates with the second passage hole 172 through the first groove 181, and the third passage hole 173 communicates with the auxiliary lower passage hole 175 through the second groove 182;
when the pumping piston 33 moves to the top dead center, the valve stem 12 is pushed by the pumping piston 33 to move to the top dead center, and the sliding valve 11 moves to the top dead center, so that the natural gas is delivered to the power upper chamber 21 through the third passage hole 173, and the power piston 23 moves downwards; when the power piston 23 moves to the bottom dead center, the valve communication pipe 12 is pushed by the power piston 23 to move to the bottom dead center, and the slide valve 11 moves to the bottom dead center, so that the natural gas is conveyed to the power lower chamber 22 through the first passage hole 171, and the liquid pumping piston 33 moves upwards; this is repeated.
The following description of the other components of the apparatus, and the modifications (which relate to the function of the auxiliary upper access hole 174 and the auxiliary lower access hole 175 described above), wherein the modification is intended to automatically disable the self-pumping pump when the level of gas well fluid 101 is low.
An isolating body 5 is arranged around the liquid pumping cylinder barrel 3 and close to the reversing valve body 1, and the outer diameter of the isolating body 5 is larger than that of the reversing valve body 1, so that a vacant space is reserved outside the reversing valve body 1; a gas collecting pipe 103 is further arranged around the device, the gas collecting pipe 103 is in sealing connection with the isolated body 5 so as to seal and isolate the whole device into an upper part and a lower part, the lower part is mainly placed in the gas well accumulated liquid 101 and is mainly used for liquid pumping, and the upper part is used for reversing, power transmission, accumulated liquid and natural gas collection and the like; therefore, the bottom of the gas collecting pipe 103 is completely opened to extract the gas well accumulated liquid 101; the top of the gas collecting pipe 103 is provided with a natural gas discharging port 102 so as to collect natural gas; the outside of the gas collecting pipe 103 is also sleeved with a sleeve 104.
In order to allow natural gas to flow, a first fluid channel 51 and a second fluid channel 52 which are communicated with two sides of the isolating body 5 are respectively arranged in the isolating body 5, the first fluid channel 51 is connected with the fluid input pipeline 42, and the second fluid channel 52 is controlled to flow or close by a lower floating ball liquid level switch 62 positioned below the isolating body 5;
the contents of the modification and the functions of the auxiliary upper passage hole 174 and the auxiliary lower passage hole 175 will now be described. If the gas well liquid 101 level drops too low, the lower float ball level switch 62 moves downward, thereby opening the second fluid passage 52, and natural gas enters the auxiliary upper passage hole 174 and the auxiliary lower passage hole 175 through the second fluid passage 52; next, when natural gas is sequentially input into the power upper chamber 21 through the first fluid passage 51, the fluid input pipeline 42, the second passage hole 712 and the third passage hole 173, the natural gas can also enter the power lower chamber 22 through the second fluid passage 52, the auxiliary upper passage hole 174 and the first passage hole 171, so that the air pressures at the two ends of the power piston 23 are balanced, and the self-pumping pump stops working; similarly, when natural gas is sequentially input into the power lower chamber 22 through the first fluid passage 51, the fluid input pipeline 42, the second passage hole 712 and the first passage hole 171, the natural gas can also enter the power lower chamber 22 through the second fluid passage 52, the auxiliary lower passage hole 175 and the third passage hole 173, so that the air pressures at the two ends of the power piston 23 are balanced, and the self-pumping pump stops working; it can be seen that the self-priming pump can be automatically stopped at an appropriate time by the arrangement of the lower float level switch 62 and the two auxiliary passage holes.
Besides, a third fluid channel 53 communicated with two sides of the isolated body 5 can be arranged in the isolated body 5, the third fluid channel 53 controls the circulation or the closing through a floating ball liquid level switch 63 positioned above the isolated body 5, so that if liquid leakage or gas condensation occurs in the liquid pumping process, the liquid drops above the isolated body 5 and reaches a liquid level high enough, the floating ball liquid level switch 63 can be opened, and the liquid is guided back to the place where the original gas well accumulated liquid 101 is located.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
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| CN201811388715.3A CN109707605B (en) | 2018-11-21 | 2018-11-21 | Improved device based on gas well pressure self-pumping pump |
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| CN201811388715.3A CN109707605B (en) | 2018-11-21 | 2018-11-21 | Improved device based on gas well pressure self-pumping pump |
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| CN109707605B true CN109707605B (en) | 2020-04-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3824850A (en) * | 1971-11-17 | 1974-07-23 | Schlumberger Technology Corp | Pressure controlled test valve system for offshore wells |
| US7832486B2 (en) * | 2007-08-15 | 2010-11-16 | Schlumberger Technology Corporation | Flapper gas lift valve |
| CN103423135B (en) * | 2012-05-14 | 2016-02-17 | 崔迺林 | Hydraulic drive oil pump |
| CN104948156B (en) * | 2015-06-19 | 2017-07-14 | 王凯 | A full-bore hydraulically driven layered fluid injection and fracturing device |
| CN204961255U (en) * | 2015-07-17 | 2016-01-13 | 盐城市佳鑫石化机械制造有限公司 | Switching -over valve and use this switching -over valve novelly prevent grinding partially hydraulic oil production device |
| CN106401925B (en) * | 2016-12-12 | 2017-10-17 | 廖嘉炜 | A kind of underground gas-liquid transducing booster pump |
| CN107120099A (en) * | 2017-06-02 | 2017-09-01 | 四川瑞晟石油设备开发有限公司 | A kind of Full-automatic drainage gas recovery facility |
| CN207960579U (en) * | 2018-03-09 | 2018-10-12 | 中国石油大学(华东) | A kind of preset tubing string pneumatic type drainage gas production tool |
| CN108468639B (en) * | 2018-05-29 | 2024-03-22 | 南京聚源隆能源科技有限公司 | Automatic reversing device of oil well liquid-driven reciprocating oil pumping system |
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Denomination of invention: Improved device based on the pressure of gas well self-suction pump Granted publication date: 20200424 Pledgee: China Minsheng Bank Co.,Ltd. Dalian Branch Pledgor: DALIAN HUAKE MACHINERY Co.,Ltd. Registration number: Y2025980067990 |
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