CN203685553U - Anti-blocking dropping-fishing draining pump of coal-bed gas well - Google Patents
Anti-blocking dropping-fishing draining pump of coal-bed gas well Download PDFInfo
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- CN203685553U CN203685553U CN201320739281.3U CN201320739281U CN203685553U CN 203685553 U CN203685553 U CN 203685553U CN 201320739281 U CN201320739281 U CN 201320739281U CN 203685553 U CN203685553 U CN 203685553U
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- gas well
- control valve
- bed gas
- liquid
- piston
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Abstract
The utility model relates to an anti-blocking dropping-fishing draining pump of a coal-bed gas well. The anti-blocking dropping-fishing draining pump comprises a pumping and drainage part, a piston and a cylinder barrel sleeved outside the piston, wherein the pumping and drainage part is driven to pump and drain moisture in the coal-bed gas well through the piston, the pumping and drainage part is fixedly arranged at the bottom of the cylinder barrel, and the excircle of the piston is hermetically matched up with a part of an inner circle of the cylinder barrel in the full stroke. The anti-blocking dropping-fishing draining pump of the coal-bed gas well, provided by the utility model is capable of effectively preventing the piston from being blocked and reducing the abrasion.
Description
Technical field
The utility model relates to a kind of draining pump, and relating in particular to a kind of coal bed gas well anti-sticking can pulling draining pump.
Background technique
The production process of coal bed gas well, is by the artesian water in the reservoir of pump drainage coal seam, makes coal seam pressure decreased, to reach the object of gas production.In coal seam, water constantly produces, and requires drainage procedure to continue to carry out, can not interrupt, and just output continually of coal-seam gas, otherwise can cause coal bed gas well damage influence aerogenesis.
In the outside piston length (piston length is a bit of) of existing coal bed gas well draining pump used and cylinder barrel, full stroke is sealed and matched, cylinder barrel inner circle seal length is grown (length of stroke), need to be furnished with larger gap, piston is to-and-fro motion in cylinder barrel, coal seam water contains coal dust, silt, can cause holddown, need termination of pumping operation maintenance.
Meanwhile, cylinder barrel and have coal dust, sedimentation above piston, when piston stroking upward, differential pressure is larger, and pressure direction is identical with coal dust sedimentation direction, and coal dust easily enters between cylinder barrel and piston, causes holddown and wearing and tearing.
Moreover pump barrel, standing valve, liquid entering hole, screen casing are fastened on the lower end of OIH pipe.Once any part of pump breaks down, whole oil pipes in well must be extracted to maintenance together with pump.Workload is large, somewhat expensive.
Model utility content
In order to solve the above-mentioned technical deficiency problem of mentioning, the utility model provides a kind of can effectively prevent that piston from being blocked and the coal bed gas well anti-sticking that can reduce wear can pulling draining pump.
Technical solution of the present utility model is: the utility model provides a kind of coal bed gas well anti-sticking can pulling draining pump, comprises water-pumping/draining parts, piston and is sleeved on the cylinder barrel of piston outside; Described piston driving water-pumping/draining parts extract and discharge the moisture content of coal bed gas well inside; Described water-pumping/draining parts are fixedly installed on cylinder barrel bottom; Its special way is: the full stroke of described outside piston and part cylinder barrel inner circle are sealed and matched.
The top of above-mentioned cylinder barrel is provided with inclined-plane or the conical surface for avoiding coal dust to pile up.
Above-mentioned water-pumping/draining parts comprise liquid-inlet, first fluid control valve, second fluid control valve, liquid communication pipeline and liquid-discharging tube; Between described piston base and water-pumping/draining component top, form liquid storage chamber, described liquid-inlet connects by first fluid control valve and liquid communication pipeline and liquid storage chamber; Described liquid storage chamber connects by liquid communication pipeline and second fluid control valve and liquid-discharging tube.
Above-mentioned first fluid control valve and second fluid control valve are all ball valves.
Above-mentioned first fluid control valve and second fluid control valve include control valve seat and are arranged on the control ball on control valve seat.
Aforesaid liquid import outer installment has wire-wrapped screen.
The utility model has the advantages that:
The utility model provides a kind of coal bed gas well anti-sticking can pulling draining pump, owing to adopting plunger seal, the namely full stroke of outside piston and a bit of sealing of cylinder barrel inner circle, outside piston seal length is grown (length of stroke), compared with the piston seal of existing pump, piston turning is than cylinder barrel inner circle easy processing, and the matching gap of piston seal is less, can effectively prevent that piston from being blocked; Meanwhile, the utility model is provided with a plane of inclination at outer rim place, the upper end of cylinder barrel, avoids coal dust to pile up, and can in stroke, remove the coal dust on piston rod.Descent of piston pumps liquid, the sedimentation opposite direction of the pressure direction that cylinder barrel is upper and lower and coal dust, and coal dust is not easy to enter seal clearance, greatly reduces holddown odds, reduces wearing and tearing.The utility model effectively reduces wearing and tearing or the holddown phenomenon of coal dust to cylinder barrel and piston, significantly extends well workover cycle and working life.
Brief description of the drawings
Fig. 1 is the partial structurtes sectional view of draining pump in the time drawing water in prior art;
Fig. 2 is the partial structurtes sectional view of draining pump in the time of draining in prior art;
Fig. 3 is that coal bed gas well anti-sticking provided by the utility model can the partial structurtes sectional view of pulling draining pump in the time of draining;
Fig. 4 is that coal bed gas well anti-sticking provided by the utility model can the partial structurtes sectional view of pulling draining pump in the time drawing water.
Embodiment
The utility model provides a kind of coal bed gas well anti-sticking can pulling draining pump, and coal bed gas well anti-sticking provided by the utility model can pulling draining pump be to adopt the full stroke of outside piston and part cylinder barrel inner circle to be sealed and matched.
Meanwhile, the utility model is piled up at cylinder barrel top for fear of coal dust, is provided with a plane of inclination or the conical surface at the top of cylinder barrel, can in stroke, remove the coal dust on piston rod.
Referring to Fig. 1 and Fig. 2, show the draining pump of prior art, adopt the composite structure of a standing valve 102 and a traveling valve 104.Be fixed on the lower end of oil pipe 106 in the bottom 101 of standing valve 102.Therefore in the time of work, standing valve 102 can remain fixed in the bottom of well 108.In prior art pump, traveling valve 104 is connected in the piston 105 of rod string 107 lower ends, and along with moving up and down of rod string 107 moves back and forth in well 108 bottoms.
Only referring to Fig. 1, as arrow upwards as shown in, in the upstroke of rod string 107, the standing valve 102 of prior art pump is opened, traveling valve 104 cuts out, liquid enters in the pump chamber 103 between standing valve 102 and traveling valve 104 like this.
Again referring to Fig. 2, as arrow downwards as shown in, in the down stroke of rod string 107, standing valve 102 cuts out, traveling valve 104 is opened, thereby forces liquid in pump chamber 103 through traveling valve 104, enters pump and be arranged in the fluid chamber of traveling valve 104 tops.Oil pipe inner space is extended down to the ground of well 108 end of from by rod string 107 and oil pipe 106 inside.
In the time that the next upstroke of rod string 107 starts, the liquid that is positioned at fluid chamber must be pumped out ground along rod string 107 and traveling valve 104.In upstroke process, rod string is being born the down pressure that the weight of the whole fluid column in weight and the oil pipe space of liquid in fluid chamber produces.Therefore, rod string 107 needs to smoke huge weight in each upstroke.
In the time that rod string 107 carries out continuously upper and lower stroke movement repeatedly, increasing liquid is by the internal oil pipe space entering in oil pipe 106.This is due to the liquid that can only move up, thereby it is removed from well 108 on the interior surface that flows to well 108 of oil pipe 106.In prior art pump, for liquid being pumped to ground, except the energy to equipment and load have requirement, also have some other defects, comprise and easily blocked by particulate matter and produce gas lock.
Referring to Fig. 3 and Fig. 4, wherein Fig. 3 shows liquid flowing in the time of plunger 321 upstroke, the mobility status of liquid when Fig. 4 shows plunger 321 down stroke.Arrow in Fig. 3 and Fig. 4 is all to show along with the flow direction of pump motion liquid in pump.
Working procedure of the present utility model is: in Fig. 3, in the time of plunger 321 upstroke, lower standing valve 309 is opened, and upper standing valve 313 cuts out.Therefore, in the time of plunger 321 upstroke, liquid upwards by 304 wire-wrapped screens hollow base sealing joint 307 enter lower standing valve 309, then by lower valve cylinder 310, finally, through turnover joint 316, enter pump barrel 317 closed chambers.
When plunger 321 has completed after up stroke, it oppositely starts its decline stroke.As shown in arrow in Fig. 4 is downward, in the time that plunger 321 starts to move downward, lower ball valve 309 is closed.Upper ball valve 313 is opened simultaneously.When plunger 321 continues undershoot, the liquid in pump barrel 317 closed chambers, from turnover joint 316 passage around, flows back into the chamber between two ball valves in connecting cylinder 315 downwards.Because lower standing valve 309 has cut out, liquid oppositely rises, and by the upper standing valve 313 of unlatching, then by the centre gangway of turnover joint 316, flows out from side opening, enters the pipe interior space of top between rod collar 322 and oil pipe 203.Continuous plunger 321 is pumped motion increasing liquid is sent in oil pipe 203 from exhaust port.Because liquid can only upwards flow, finally in oil pipe 203, flow to earth's surface.
Claims (6)
1. coal bed gas well anti-sticking can a pulling draining pump, comprises water-pumping/draining parts, piston and is sleeved on the cylinder barrel of piston outside; Described piston driving water-pumping/draining parts extract and discharge the moisture content of coal bed gas well inside; Described water-pumping/draining parts are fixedly installed on cylinder barrel bottom; It is characterized in that: the full stroke of described outside piston and part cylinder barrel inner circle are sealed and matched.
2. coal bed gas well anti-sticking according to claim 1 can pulling draining pump, it is characterized in that: the top of described cylinder barrel is provided with inclined-plane or the conical surface for avoiding coal dust to pile up.
3. coal bed gas well anti-sticking according to claim 1 and 2 can pulling draining pump, it is characterized in that: described water-pumping/draining parts comprise liquid-inlet, first fluid control valve, second fluid control valve, liquid communication pipeline and liquid-discharging tube; Between described piston base and water-pumping/draining component top, form liquid storage chamber, described liquid-inlet connects by first fluid control valve and liquid communication pipeline and liquid storage chamber; Described liquid storage chamber connects by liquid communication pipeline and second fluid control valve and liquid-discharging tube.
4. coal bed gas well anti-sticking according to claim 3 can pulling draining pump, it is characterized in that: described first fluid control valve and second fluid control valve are all ball valves.
5. coal bed gas well anti-sticking according to claim 4 can pulling draining pump, it is characterized in that: described first fluid control valve and second fluid control valve include control valve seat and be arranged on the control ball on control valve seat.
6. coal bed gas well anti-sticking according to claim 5 can pulling draining pump, it is characterized in that: described liquid-inlet outer installment has wire-wrapped screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320739281.3U CN203685553U (en) | 2013-11-19 | 2013-11-19 | Anti-blocking dropping-fishing draining pump of coal-bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320739281.3U CN203685553U (en) | 2013-11-19 | 2013-11-19 | Anti-blocking dropping-fishing draining pump of coal-bed gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203685553U true CN203685553U (en) | 2014-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320739281.3U Expired - Fee Related CN203685553U (en) | 2013-11-19 | 2013-11-19 | Anti-blocking dropping-fishing draining pump of coal-bed gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203685553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629107A (en) * | 2013-11-19 | 2014-03-12 | 西安思坦仪器股份有限公司 | Anti-blocking throw-in type draining pump of coal-bed gas well |
-
2013
- 2013-11-19 CN CN201320739281.3U patent/CN203685553U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629107A (en) * | 2013-11-19 | 2014-03-12 | 西安思坦仪器股份有限公司 | Anti-blocking throw-in type draining pump of coal-bed gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20211119 |