CN202597035U - Fluid feedback draining and mining pump used for coal bed gas development - Google Patents
Fluid feedback draining and mining pump used for coal bed gas development Download PDFInfo
- Publication number
- CN202597035U CN202597035U CN 201220144507 CN201220144507U CN202597035U CN 202597035 U CN202597035 U CN 202597035U CN 201220144507 CN201220144507 CN 201220144507 CN 201220144507 U CN201220144507 U CN 201220144507U CN 202597035 U CN202597035 U CN 202597035U
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- lower contact
- pump
- plunger
- nozzle
- outlet
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Abstract
The utility model relates to coal bed gas mining equipment, in particular to a fluid feedback draining and mining pump used for coal bed gas development. The fluid feedback draining and mining pump used for coal bed gas development comprises a pump pipe and a plunger piston, the upper end of the pump pipe is communicated with an upper joint, and the lower end of the pump pipe is connected with a lower joint; the upper end of the plunger piston is connected with a sucker rod pipe nipple; the upper end of the central hole of the plunger piston is communicated with an outlet at the upper end of the pump pipe through a liquid outlet groove, and the lower end of the central hole of the plunger piston is communicated with an inlet at the lower end of the pump pipe; the inner cavity of the lower joint is internally provided with a standing valve; the periphery of the pump pipe is sleeved with a gap bridge pipe, and the lower end of the gap bridge pipe is in sealing connection with an outer cylinder; the inner cavity of the lower joint is internally provided with a nozzle, an outlet at the upper end of the nozzle is communicated with the outlet of the lower joint, an inlet at the lower end of the nozzle is communicated with a feedback cavity through a one-way valve, and the feedback cavity is communicated with the inner cavity of the outer cylinder through a side opening. Through the nozzle, the fluid discharged out from the pump pipe is partially branched off and is fed back and guided to the nozzle, and a low pressure area is generated at the outlet of the lower joint; therefore, the problem of holddown is efficiently avoided, and continuous and reliable operation of draining and mining work is improved.
Description
Technical field
The utility model relates to a kind of coal-bed gas exploitation equipment, specifically is that a kind of fluid power feedback row who is used for cbm development adopts pump.
Background technique
For row's excavating technology of coal-seam gas, mainly contain screw pump row's excavating technology and tubing pump row excavating technology at present.Coal bed gas well is adopted in the process row, and because of coal dust and sand are separated out from the coal seam, and part row adopts the extremely low (1～5m of lifting rate of well
3/ d), cause coal dust and sand to discharge and be trapped in the equipment with flow, the holddown phenomenon takes place easily, influenced the normal operation of equipment.
Summary of the invention
A kind of fluid power feedback row who is used for cbm development of the utility model adopts pump and includes pump line and the plunger with center hole that can in pump line, move back and forth, and the pump line upper end communicates with the upper connection that is connected oil pipe, and the pump line lower end connects lower contact; The plunger upper end is connected with sucker rod substitute, and the sucker rod of pumping unit can move back and forth through the sucker rod substitute drive plunger is upper and lower; The center hole of plunger upper end exports with the pump line upper end through liquid outlet groove and communicates, and is provided with the travelling valve that can move with plunger in the plunger center hole, and end entrance and lower contact inner chamber communicate under plunger center hole lower end and the pump line; Be provided with standing valve in the said lower contact inner chamber, standing valve is connected under the lower contact in the passage between the outlet of end entrance and upper end; Said pump line periphery is with a cross under, and the cross under upper end is tightly connected with upper connection, and the cross under lower end urceolus peripheral with being enclosed within lower contact is tightly connected, and urceolus lower end and lower contact outer wall are tightly connected; Be provided with a nozzle in the inner chamber of said lower contact; Said upper end of nozzle outlet communicates with the outlet of lower contact; The following end entrance of nozzle communicates with the feedback cavity of a sealing through an one-way valve, and said feedback cavity communicates with the inner chamber of said urceolus through the side opening of opening on the lower contact sidewall.
Be provided with screen pipe between the epimere of said cross under inner chamber and the hypomere.
The ingress of said lower contact lower end is provided with down screen pipe.
The utility model feeds back drainage to nozzle through in the lower contact inner chamber, nozzle being set by the separating liquid part that pump line is discharged, and the pressure that utilizes fluid column itself to produce forms spray liquid flow; Through spraying; Outlet port in lower contact produces low pressure area, and the coal dust that is deposited on the standing valve place, sand etc. are sucked pump barrel, finally discharges ground through oil pipe; Thereby the holddown phenomenon of effectively having avoided coal dust, sand to be detained in equipment being caused has improved row and has adopted the continuous reliable operation of operation.
Description of drawings
Fig. 1 is the structural representation of the utility model upper half part;
Fig. 2 is the structural representation of lower half portion of the utility model.
Embodiment
As shown in the figure, this fluid power feedback row who is used for cbm development adopts pump and includes pump line 1 and the plunger with center hole 2 that can in pump line, move back and forth, and the pump line upper end communicates with the upper connection that is connected oil pipe 3, and the pump line lower end connects lower contact 4; The plunger upper end is connected with sucker rod substitute 5, and the sucker rod of pumping unit can move back and forth through the sucker rod substitute drive plunger is upper and lower; The center hole of plunger upper end exports with the pump line upper end through liquid outlet groove 16 and communicates, and is provided with the travelling valve 6 that can move with plunger in the plunger center hole, and 1 time end entrance in plunger center hole lower end and pump line and lower contact 4 inner chambers communicate; Be provided with standing valve 5 in said lower contact 4 inner chambers, standing valve 5 is connected under the lower contact in the passage between the outlet of end entrance and upper end; Pump line 1 periphery is with a cross under 7, and cross under 7 upper ends and upper connection 3 are tightly connected, and the cross under 7 lower ends urceolus 8 peripheral with being enclosed within lower contact is tightly connected, and urceolus 8 lower ends and lower contact 4 outer walls are tightly connected; Be provided with a nozzle 9 in the inner chamber of lower contact 4; The upper end outlet of nozzle 9 communicates with the outlet of lower contact; The following end entrance of nozzle 9 communicates with the feedback cavity 12 of a sealing through an one-way valve 11, and feedback cavity communicates with the inner chamber of urceolus 8 through the side opening of opening on the lower contact sidewall 13.Be provided with screen pipe 14 between the epimere of cross under 7 inner chambers and the hypomere.The ingress of lower contact 4 lower ends is provided with down screen pipe 15.
The working principle of the utility model is: row adopts in the operation process; Plunger 2 moves back and forth in pump line 1; Make the liquid of lower contact 4 belows suck plunger cavity through standing valve 5 and pass through liquid outlet groove 16 discharges; A part of liquid of discharging plunger is discharged to ground through upper connection 3 and oil pipe; Inner chamber between another part liquid process pump line 1 and the cross under 7 enters into the inner chamber of urceolus 8, arrives nozzles 9, and causes the outlet port of lower contact by nozzle ejection through the side opening 13 on the lower contact outer wall, feedback cavity 12, one-way valve 11 successively then.The jet pressure of nozzle comes from the above head of liquid to ground of lower contact.
Claims (3)
1. a fluid power feedback row who is used for cbm development adopts pump, the plunger with center hole (2) that includes pump line (1) and can in pump line, move back and forth, and the pump line upper end communicates with the upper connection that is connected oil pipe (3), and the pump line lower end connects lower contact (4); The plunger upper end is connected with sucker rod substitute (5), and the sucker rod of pumping unit can move back and forth through the sucker rod substitute drive plunger is upper and lower; The center hole of plunger upper end exports with the pump line upper end through liquid outlet groove (16) and communicates, and is provided with the travelling valve (6) that can move with plunger in the plunger center hole, and plunger center hole lower end descends end entrance and lower contact (4) inner chamber to communicate with pump line (1); Be provided with standing valve (5) in said lower contact (4) inner chamber, standing valve (5) is connected under the lower contact in the passage between the outlet of end entrance and upper end; It is characterized in that: pump line (1) periphery is with a cross under (7); Cross under (7) upper end is tightly connected with upper connection (3); Cross under (7) the lower end urceolus (8) peripheral with being enclosed within lower contact is tightly connected, and urceolus (8) lower end and lower contact (4) outer wall are tightly connected; Be provided with a nozzle (9) in the inner chamber of lower contact (4); The upper end outlet of nozzle (9) communicates with the outlet of lower contact; The following end entrance of nozzle (9) communicates with the feedback cavity (12) of a sealing through an one-way valve (11), and feedback cavity communicates with the inner chamber of urceolus (8) through the side opening of opening on the lower contact sidewall (13).
2. a kind of fluid power feedback row who is used for cbm development according to claim 1 adopts pump, it is characterized in that: be provided with screen pipe (14) between the epimere of cross under (7) inner chamber and the hypomere.
3. a kind of fluid power feedback row who is used for cbm development according to claim 1 and 2 adopts pump, and it is characterized in that: the ingress of lower contact (4) lower end is provided with down screen pipe (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220144507 CN202597035U (en) | 2012-04-09 | 2012-04-09 | Fluid feedback draining and mining pump used for coal bed gas development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220144507 CN202597035U (en) | 2012-04-09 | 2012-04-09 | Fluid feedback draining and mining pump used for coal bed gas development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597035U true CN202597035U (en) | 2012-12-12 |
Family
ID=47314582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220144507 Expired - Fee Related CN202597035U (en) | 2012-04-09 | 2012-04-09 | Fluid feedback draining and mining pump used for coal bed gas development |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597035U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567695A (en) * | 2016-11-02 | 2017-04-19 | 中国石油化工股份有限公司 | Oil well gas prevention system |
-
2012
- 2012-04-09 CN CN 201220144507 patent/CN202597035U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567695A (en) * | 2016-11-02 | 2017-04-19 | 中国石油化工股份有限公司 | Oil well gas prevention system |
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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: 20121212 Termination date: 20160409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |