CN201826818U - Water draining and gas producing device special for screw pump of coal bed gas - Google Patents
Water draining and gas producing device special for screw pump of coal bed gas Download PDFInfo
- Publication number
- CN201826818U CN201826818U CN2010205847492U CN201020584749U CN201826818U CN 201826818 U CN201826818 U CN 201826818U CN 2010205847492 U CN2010205847492 U CN 2010205847492U CN 201020584749 U CN201020584749 U CN 201020584749U CN 201826818 U CN201826818 U CN 201826818U
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- screw pump
- oil pipe
- coal bed
- anchor
- producing device
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Abstract
The utility model discloses a water draining and gas producing device special for a screw pump of coal bed gas, which comprises a lead, an oil pipe, a screw pump, an anchoring device and a screen pipe connected with a control system, wherein the oil pipe is arranged in a sleeve, a pumping rod is positioned in the oil pipe and connected with a rotor of the screw pump, a stator of the screw pump is connected with the oil pipe, a wiring groove is arranged at one side of the outer surface of the anchoring device, the anchoring device is arranged at the upper part of the screw pump, the upper part of the anchoring device is connected with an upper-part oil pipe by a forward oil pipe buckle, the lower part of the anchoring device is connected with the screw pump by a reverse oil pipe buckle, the lower part of the screw pump is connected with the screen pipe, and a pressure gauge is arranged outside the screen pipe. When the water draining and gas producing device is in work, the screw pump and the screen pipe can be arranged at any position under the coal bed, thus overcoming the deficiency of the prior art that the anchoring device can be buried by sand and coal dust in the coal bed; and the water draining and gas producing device has high production efficiency and high reliability, and enables the screw pump to have long service life. In addition, the pressure gauge is arranged outside the screen pipe, therefore, the pressure gauge can be arranged at any position under the coal bed, and can measure the position of the liquid level of the coal bed accurately.
Description
Technical field
The utility model relates to a kind of coal bed gas bolt special pump drainage gas producing device of coal mining.
Background technology
Adopt following three kinds of screw pump water pumping gas productions at present in the process of coal mining:
First kind: mechanical anchor screw pump water pumping gas production tubing string.This tubing string in the screw pump bottom Y211 is installed or Y221 machinery anchor comes grappling screw pump flow string.This anchor be by on put and put tubing string (or rotation transfer tubing string) and sit card and come anchoring string, pressing down the tubing string burden requirement reaches more than the 6t, but such mechanical anchor mainly is to be used for grappling up and down, because not locking between cone and the slips, can't effectively be rotated grappling, need press down bigger load (more than the 15t,) increase anchorage force by frictional force between cone and the slips, need ground supporting wire rope tension and compression tubing string to increase load, operate dangerous, it is limited to press down load, tubing bending, thus Y211 or Y221 machinery anchor can't be reliably effective grappling screw pump tubing string.
Second kind: turnover panel anchor screw pump water pumping gas production tubing string
This tubing string has been installed the turnover panel anchor in the screw pump bottom, relies on the turnover panel anchor to come grappling screw pump flow string, avoids screw pump top oil pipe to thread off, and prolongs and produces the life-span.This anchor is that the rotation by tubing string in the manufacturing process drives the grappling of coming out of turnover panel and slips Shen, and termination of pumping end blocking and slips reclaim, and in application process, still occur the grappling failure phenomenon often, cause oil pipe to thread off, and influence are produced.
The third: no grappling screw pump water pumping gas production tubing string
The oil pipe of this flow string all is connected by the dextrorotation tubing thread with screw pump, and screw pump is just to transfer mine water is discharged by surface drive drive sucker rod and rotor.Therefore the positive torque of screw pump will make top tubing thread counter-rotating shackle, and oil pipe is threaded off, frequent operation thereby cause, and influence is produced.
There is following problem in above-mentioned three kinds of screw pumps:
1. go out coal ash, the card that shakes out buries tubing anchor
Because water pumping gas production need be arrived the position, coal seam down with screw pump, no matter is which kind of tubing anchor is all very near from the coal seam therefore as far as possible, the coal ash that the coal seam is taken out of in process of production, sand are deposited on the tubing anchor position easily.Cause tubing anchor to be difficult to unfreezing easily, cause the tubing string overhaul by card.
2. water pumping gas production instability, screw pump is short application life
In the middle of the water pumping gas production process, because the water yield is uncertain, in time, lacked for a long time, so screw pump easily generation dry grinding under the few situation of water yield, causes wearing and tearing of stator and rotor even damage, influences water pumping gas production.
3. the pressure gauge that shows coalfield draining page height is installed in the outside, coal seam.Measure inaccuracy.
Summary of the invention
Goal of the invention of the present utility model is the many deficiencies at prior art, provide a kind of anchor is installed on the screw pump, make it on the coal seam, avoid the coal ash sand to bury anchor, water pumping gas production is stable, the coal bed gas bolt special pump drainage gas producing device of screw pump long service life.
Realize above-mentioned purpose by the following technical solutions: a kind of coal bed gas bolt special pump drainage gas producing device, comprise the lead that is connected with control system, oil pipe, screw pump, anchor and screen casing, oil pipe places in the sleeve pipe, sucker rod is positioned at oil pipe, this sucker rod is connected with the rotor of screw pump, the stator of screw pump is connected with oil pipe, external surface one side of described anchor is provided with Wire channel in building, this anchor is installed in the top of screw pump, its top is connected with the top oil pipe with the forward tubing thread, the bottom is connected with screw pump with the reverse oil pipe thread, and the bottom of screw pump is connected with screen casing, and this screen casing outside is equipped with pressure gauge.
Adopt technique scheme, compared with prior art, screw pump of the present utility model is positioned under the anchor, and anchor is positioned at the steel sleeve on the coal seam, is connected with screen casing, during work, screw pump and screen casing can be following under the coal seam any position, overcome that the prior art coal seam shakes out and coal dust is buried the defective of anchor, production efficiency height, good reliability, the screw pump long service life.Because screw pump is positioned under the anchor, and anchor is connected with oil pipe employing right-hand thread, and with screw pump left-hand thread connection structure connecting, during normal operation, oil pipe takes off mouth never, also can not bury anchor by sand.For maximum is brought into play the potentiality of this structure, setting sucker rod in the protection system of device, maximum to allow safe torque be maximum value, if when actual torque is worth greater than this with regard to autostop, with protective device.This device is installed in the outside of screen casing with pressure gauge in addition, can be directly down to the optional position in coal seam, and it is accurate to measure coal seam liquid level high and low position.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model.
Among the figure, sleeve pipe 1, oil pipe 2, sucker rod 3, anchor 4, Wire channel in building 5, screw pump 6, lead 7, screen casing 8, pressure gauge 9, plug 10.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Present embodiment is a kind of coal bed gas bolt special pump drainage gas producing device, is made up of sleeve pipe 1, oil pipe 2, anchor 4, screw pump 6, screen casing 8 and sucker rod 3 etc.
See Fig. 1, oil pipe 2 places in the sleeve pipe 1, and anchor 4 is installed in the bottom of oil pipe 2, is positioned at the top of screw pump 6, and it is 6 millimeters Wire channel in building 5 that external surface one side of anchor 4 has diameter.Screw pump 6 is installed on the oil pipe 2 of anchor 4 bottoms, and the bottom of screw pump 6 is connected with screen casing 8, and the bottom of screen casing 8 is airtight with plug 10, setting pressure meter 9 on the screen casing 8, and its effect is the high and low position that shows the coal seam liquid level.Lead 7 is positioned at pipe box 1, the one end control system outer with being positioned at device and is connected, and the other end passes Wire channel in building 5 and is connected with pressure gauge 9.Anchor 4, screw pump 6, lead 7, screen casing 8, plug 10 all are positioned at sleeve pipe 1, and the structure of sleeve pipe 1 is divided into two parts, are the boundary with anchor 4, and the sleeve pipe that is positioned at its top is a steel work, and the sleeve pipe that is positioned at its underpart is a glass fibre reinforced plastic structure.Screw pump 6 is positioned under the coal seam together with screen casing 8.
The sucker rod 3 that is used to take out coal seam water is positioned at oil pipe 2, is connected with the rotor of screw pump 6, and the stator of screw pump 6 is connected with oil pipe 2.The top of anchor 4 is connected with top oil pipe 2 with the forward tubing thread, and the bottom is connected with screw pump 6 with the reverse oil pipe thread.This connected mode will be positioned at oil pipe 2 usefulness anchors 4 grapplings on the top of anchor 4, and it is consistent with the rotor of screw pump 6 that the tubing thread of anchor 4 bottoms revolves direction, therefore can avoid the phenomenon of threading off; Screw pump 6 can be deepened any position down to the coal seam in addition, helps draining and gas production.
During work, the bottom that this device is placed the coal seam is from the near place of gas-bearing formation, sucker rod 3 is under power drive, water in the coal seam is constantly extracted out by sucker rod 3, gas in the coal seam is the inwall that coal bed gas constantly pours in sleeve pipe 1, by the output of gas production mouth, the gas production mouth is fixed with flange, and operating personnel can construct according to the liquid level pressure that pressure gauge 9 shows.
Claims (2)
1. coal bed gas bolt special pump drainage gas producing device, comprise the lead that is connected with control system, oil pipe, screw pump, anchor and screen casing, oil pipe places in the sleeve pipe, sucker rod is positioned at oil pipe, this sucker rod is connected with the rotor of screw pump, the stator of screw pump is connected with oil pipe, it is characterized in that, external surface one side of described anchor is provided with Wire channel in building, this anchor is installed in the top of screw pump, and its top is connected with the top oil pipe with the forward tubing thread, and the bottom is connected with screw pump with the reverse oil pipe thread, the bottom of screw pump is connected with screen casing, and this screen casing outside is equipped with pressure gauge.
2. coal bed gas bolt special pump drainage gas producing device according to claim 1 is characterized in that the described lead that is connected with control system is positioned at sleeve pipe, and this lead is passed with pressure gauge by the Wire channel in building of anchor and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205847492U CN201826818U (en) | 2010-10-29 | 2010-10-29 | Water draining and gas producing device special for screw pump of coal bed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205847492U CN201826818U (en) | 2010-10-29 | 2010-10-29 | Water draining and gas producing device special for screw pump of coal bed gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201826818U true CN201826818U (en) | 2011-05-11 |
Family
ID=43965361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205847492U Expired - Fee Related CN201826818U (en) | 2010-10-29 | 2010-10-29 | Water draining and gas producing device special for screw pump of coal bed gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201826818U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797422A (en) * | 2012-07-19 | 2012-11-28 | 中国石油天然气股份有限公司 | Coal bed gas well pulverized coal salvaging, water pumping gas production integrated tubular column |
| CN105525894A (en) * | 2014-10-23 | 2016-04-27 | 中国石油天然气股份有限公司 | Method for solving pump clamping problem of coal bed gas well screw pump |
| CN113833433A (en) * | 2021-09-22 | 2021-12-24 | 中煤科工集团西安研究院有限公司 | Flow-restraining intermittent communication device and method for screw pump of coal-bed gas well |
-
2010
- 2010-10-29 CN CN2010205847492U patent/CN201826818U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797422A (en) * | 2012-07-19 | 2012-11-28 | 中国石油天然气股份有限公司 | Coal bed gas well pulverized coal salvaging, water pumping gas production integrated tubular column |
| CN102797422B (en) * | 2012-07-19 | 2014-12-24 | 中国石油天然气股份有限公司 | Coal bed gas well pulverized coal salvaging, water pumping gas production integrated tubular column |
| CN105525894A (en) * | 2014-10-23 | 2016-04-27 | 中国石油天然气股份有限公司 | Method for solving pump clamping problem of coal bed gas well screw pump |
| CN113833433A (en) * | 2021-09-22 | 2021-12-24 | 中煤科工集团西安研究院有限公司 | Flow-restraining intermittent communication device and method for screw 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 |
Granted publication date: 20110511 Termination date: 20151029 |
|
| EXPY | Termination of patent right or utility model |