CN103452820A - Anti-sand and anti-gas lock pump for coal-bed gas mechanical on/off valve - Google Patents
Anti-sand and anti-gas lock pump for coal-bed gas mechanical on/off valve Download PDFInfo
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- CN103452820A CN103452820A CN2013103621964A CN201310362196A CN103452820A CN 103452820 A CN103452820 A CN 103452820A CN 2013103621964 A CN2013103621964 A CN 2013103621964A CN 201310362196 A CN201310362196 A CN 201310362196A CN 103452820 A CN103452820 A CN 103452820A
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Abstract
The invention discloses an anti-sand and anti-gas lock pump for a coal-bed gas mechanical on/off valve. The lower end of a casing is communicated with a pump barrel through a pump barrel liquid draining valve; a plunger is arranged in the pump barrel; the upper end of the plunger is connected with a central rod of which the two ends are positioned in the casing and the pump barrel through a plunger liquid draining valve respectively; the lower end of the pump barrel is communicated with a sieve tube through a liquid charging valve; a coal-bed gas drainage pump is used for driving the plunger to move upwards through an oil pumping rod to lift the plunger out of the pump barrel, so that the volume of the entire pump cavity is increased, and the pressure is reduced; when the pressure is reduced to a sinking pressure, the liquid charging valve is opened, and liquid enters the pump barrel through the liquid charging valve; at the same time, the plunger liquid draining valve is closed, the pump barrel liquid draining valve is opened, and liquid in the pump barrel enters the oil tube through the pump barrel draining valve in the pulling process of the plunger from the pump barrel for making preparation for down stroke; when the oil pumping rod is used for driving the plunger to move downwards, the plunger liquid draining valve is opened, the volume of the pump cavity is reduced, the pressure is increased, and the liquid charging valve is closed for making preparation for the upper stroke; the anti-sand and anti-gas lock pump has the characteristics of simple structure and good sand prevention and gas prevention effects.
Description
Technical field
The invention belongs to the draining pump technical field, be specifically related to a kind of coal-seam gas machinery and open and close the anti-gas lock pump of valve sand control.
Background technique
Draining pump is one of capital equipment in the coal-bed gas exploitation process, and often contains sand grains, coal dust and gas in coal bed gas well, and this just makes draining pump that gas lock or holddown easily occur, thereby causes the draining pump cisco unity malfunction, the gas production decrease in efficiency.
What China's CBM Drainage wetting system was used mostly at present is all the pipe draining water pump, and the ground installation coupling of pipe draining water pump is more complicated, but also has the shortcomings such as the inspection pump is complicated, depth of falling well is large.And the advantage such as that rod pump has is large, easy to operate than strong adaptability, depth of falling well, function admirable, so we will carry out design and the utilization of rod pump.The exploitation of coal-seam gas is different from oil, gas extraction.Shallow (being less than 1500m) buried in general coal seam, and strata pressure is low, and the coal bed gas well water yield is less, flow stream velocity is slow, the solid particles such as coal dust sand grains that enter pump barrel will cause wearing and tearing to pump barrel and plunger, when serious, there will be the holddown phenomenon, affect the normal production of coal bed gas well.Therefore, for rod pump, be subject to coal dust to affect large situation, the pump that water pumping gas production was also once attempted is taken out equipment to be had: screw pump, electric submersible pump, air lift pump and Jet injector etc.But screw pump exist screw rod processing and matching requirements higher, pump performance is to shortcomings such as the viscosity variation of liquid are more responsive; Electric submersible pump exists depth of falling well more shallow, easily produces the shortcomings such as gas lock and electrical machinery life be shorter; The application of air lift pump and Jet injector is fewer, so we more need to carry out design and the utilization of rod pump in the coal-seam gas drainage technology.
Coal bed gas well easily causes the problems such as holddown, sand pipe laying post after the solid particle such as coal dust enters pit shaft in drainage procedure.After the coal bed gas well aerogenesis, gas also can be influential to drainage equipment, causes the problems such as drainage efficiency decline, gas lock.In order to address the above problem, reduce the impact of solid particle on drainage equipment, developed the sand setting gas prevention pump, this pump has the double action of anti-coal dust and the impact of anti-gas, the generation of coal dust holddown phenomenon in the time of can preventing stop pumping, show through on-the-spot result of practical application, uses this pump can effectively reduce coal dust and gases affect, reduce pump detection and workover and drag for the sand workload, but this pump has the shortcomings such as mechanism is more complicated.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this invention is to provide a kind of coal-seam gas machinery and open and close the anti-gas lock pump of valve sand control, have simple in structure, sand control, the effective characteristics of gas-tight.
To achieve these goals, the technical solution used in the present invention is: a kind of coal-seam gas machinery opens and closes the anti-gas lock pump of valve sand control, include sleeve pipe, the lower end of sleeve pipe is connected with pump barrel by the pump barrel liquid valve, be provided with plunger in pump barrel, the plunger upper end is connected with the center-pole in pump barrel with two ends difference sleeve pipe by the plunger liquid valve, and the pump barrel lower end is connected with screen casing by liquid feed valve.
Described center-pole is provided with vent hole.
Described screen casing inlet opening diameter is 6-10mm.
Described plunger liquid valve is the strong valve that opens and closes.
Described pump barrel liquid valve is designed to taper.
The invention has the beneficial effects as follows:
On the basis of the present invention sands-proof check, anti-coal dust and anti-gas lock phenomenon deficiency when the withdrawal mechanism of current coal-seam gas and the water pumping gas production of coal-seam gas downhole drainage pump, determined in conjunction with the basic functional principle of common oil field sand-control pump the sand control that adapts to coal-bed gas exploitation and prevented gas lock draining pump scheme.This scheme has been determined the structure of CBM Drainage water pump, key design the part such as the pump barrel of this pump and plunger, and this pump delivery and pump efficiency are calculated.The design of this structure can prevent the generation of holddown, gas lock phenomenon effectively, thereby has improved the draining pump performance, has improved the output of coal-seam gas, has increased the economic benefit of cbm development.Concrete manifestation is in the following areas:
1) this pump has adopted mechanical strong keying valve formula plunger liquid valve, and the power of dependence sucker rod is realized the keying of cone valve preventing the generation of holddown and gas lock phenomenon;
2) the pump barrel liquid valve of this pump is designed to taper, when CBM Drainage pump working or stop pumping, sand grains in well liquid and coal dust are stopped by the pump barrel liquid valve of taper, can not enter in pump barrel or pile up in pump barrel, therefore can effectively prevent the generation of sand card, sand buried column plug phenomenon;
3) the center-pole upper design of this pump has vent hole, and such center-pole can prevent that the gas lock phenomenon from occurring effectively;
4) this pump is provided with screen casing at pump barrel bottom liquid inlet place, and this screen casing inlet opening diameter is 8mm, and this kind of design can effectively be controlled the solid particles such as large footpath coal dust, sand grains and enter pump barrel, thereby effectively prevents the generation of holddown phenomenon.
The present invention has that maintaining is convenient, durable in use, reliable operation and can be the characteristics of coal-bed gas exploitation long term service.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The structural representation that Fig. 2 is the strong open-close type plunger of the present invention liquid valve.
Fig. 3 is upstroke schematic diagram of the present invention.
Fig. 4 is down stroke schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1,2, a kind of coal-seam gas machinery opens and closes the anti-gas lock pump of valve sand control, include sleeve pipe 1, the lower end of sleeve pipe 1 is connected with pump barrel 4 by pump barrel liquid valve 3, be provided with plunger 6 in pump barrel 4, plunger 6 upper ends connect mechanical valve seat 10, and plunger liquid valve 5 is connected with the center-pole 2 in pump barrel 4 with sleeve pipe 1 by thrust deck 9, formed strong open-close type plunger liquid valve, pump barrel 4 lower ends are connected with screen casing 8 by liquid feed valve 7.
Described center-pole 2 is provided with vent hole.
Described screen casing inlet opening diameter is 8mm.
Described plunger liquid valve is the strong valve that opens and closes.
Described pump barrel liquid valve 3 is designed to taper.
working principle of the present invention is:
The anti-gas lock draining pump of this coal-seam gas sand control is to improve on the architecture basics of standard oil well pump, thus its working principle and general standard oil well pump basically identical.
As shown in Figure 3, the CBM Drainage water pump drives a plunger plunger that moves upward by sucker rod and proposes from pump barrel upstroke, makes the volume of whole pump chamber increase and cause pressure to reduce.When pressure is decreased to pump intake pressure, liquid feed valve is opened, and liquid enters pump barrel by liquid feed valve; Meanwhile the plunger liquid valve is closed, and the pump barrel liquid valve is opened, and in the process that plunger proposes from pump barrel, makes the liquid in pump barrel enter in oil pipe by the pump barrel liquid valve, so the corresponding volume that rises of the liquid in oil pipe, for down stroke does homework.
Down stroke as shown in Figure 4, when sucker rod moves downward with plunger, open by the plunger liquid valve, meanwhile the pump chamber smaller volume causes pressure to increase, thereby liquid feed valve is closed, this enters in the pump barrel upper chamber with regard to the liquid that makes plunger inside, for upstroke does homework.
Claims (6)
1. a coal-seam gas machinery opens and closes the anti-gas lock pump of valve sand control, include sleeve pipe (1), it is characterized in that, the lower end of sleeve pipe (1) is connected with pump barrel (4) by pump barrel liquid valve (3), be provided with plunger (6) in pump barrel (4), plunger (6) upper end is connected with the center-pole (2) in pump barrel 4 with two ends difference sleeve pipes (1) by plunger liquid valve (5), and pump barrel (4) lower end is connected with screen casing (8) by liquid feed valve (7).
2. a kind of coal-seam gas machinery according to claim 1 opens and closes the anti-gas lock pump of valve sand control, it is characterized in that, described center-pole (2) is provided with vent hole.
3. a kind of coal-seam gas machinery according to claim 1 opens and closes the anti-gas lock pump of valve sand control, it is characterized in that, described screen casing inlet opening diameter is 6-10mm.
4. a kind of coal-seam gas machinery according to claim 1 opens and closes the anti-gas lock pump of valve sand control, it is characterized in that, described plunger liquid valve is the strong valve that opens and closes.
5. a kind of coal-seam gas machinery according to claim 1 opens and closes the anti-gas lock pump of valve sand control, it is characterized in that, described pump barrel liquid valve (3) is designed to taper.
6. a kind of coal-seam gas machinery according to claim 3 opens and closes the anti-gas lock pump of valve sand control, it is characterized in that, described screen casing inlet opening diameter is 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103621964A CN103452820A (en) | 2013-08-20 | 2013-08-20 | Anti-sand and anti-gas lock pump for coal-bed gas mechanical on/off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103621964A CN103452820A (en) | 2013-08-20 | 2013-08-20 | Anti-sand and anti-gas lock pump for coal-bed gas mechanical on/off valve |
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| Publication Number | Publication Date |
|---|---|
| CN103452820A true CN103452820A (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103621964A Pending CN103452820A (en) | 2013-08-20 | 2013-08-20 | Anti-sand and anti-gas lock pump for coal-bed gas mechanical on/off valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162908A (en) * | 2018-11-05 | 2019-01-08 | 青岛理工大学 | Horizontal well self-centering plug type cone valve pump |
| CN113007087A (en) * | 2021-03-24 | 2021-06-22 | 中联煤层气有限责任公司 | Structure for removing gas lock of diaphragm pump of coal-bed gas well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969518A (en) * | 1988-11-14 | 1990-11-13 | Stren Company | Reciprocating rod type downhole pump |
| CN2616711Y (en) * | 2003-01-16 | 2004-05-19 | 罗绍东 | Sand-washing oil-well pump |
| CN103133316A (en) * | 2011-11-29 | 2013-06-05 | 严欢 | Mechanical switch valve oil-well pump and oil pumping technology thereof |
| CN103133309A (en) * | 2011-11-29 | 2013-06-05 | 严欢 | Oil pumping technique based on mechanical open-and-close valve oil well pump |
| CN103133315A (en) * | 2011-11-29 | 2013-06-05 | 严欢 | Mechanical switch valve oil-well pump |
-
2013
- 2013-08-20 CN CN2013103621964A patent/CN103452820A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969518A (en) * | 1988-11-14 | 1990-11-13 | Stren Company | Reciprocating rod type downhole pump |
| CN2616711Y (en) * | 2003-01-16 | 2004-05-19 | 罗绍东 | Sand-washing oil-well pump |
| CN103133316A (en) * | 2011-11-29 | 2013-06-05 | 严欢 | Mechanical switch valve oil-well pump and oil pumping technology thereof |
| CN103133309A (en) * | 2011-11-29 | 2013-06-05 | 严欢 | Oil pumping technique based on mechanical open-and-close valve oil well pump |
| CN103133315A (en) * | 2011-11-29 | 2013-06-05 | 严欢 | Mechanical switch valve oil-well pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162908A (en) * | 2018-11-05 | 2019-01-08 | 青岛理工大学 | Horizontal well self-centering plug type cone valve pump |
| CN109162908B (en) * | 2018-11-05 | 2019-10-25 | 青岛理工大学 | Horizontal well self-centering plug type cone valve pump |
| CN113007087A (en) * | 2021-03-24 | 2021-06-22 | 中联煤层气有限责任公司 | Structure for removing gas lock of diaphragm pump of coal-bed gas well |
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Application publication date: 20131218 |