CN202900099U - Wellhead device of concentric double-skin tubular column reverse circulation continuous flushing coal powder system - Google Patents
Wellhead device of concentric double-skin tubular column reverse circulation continuous flushing coal powder system Download PDFInfo
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- CN202900099U CN202900099U CN 201220214991 CN201220214991U CN202900099U CN 202900099 U CN202900099 U CN 202900099U CN 201220214991 CN201220214991 CN 201220214991 CN 201220214991 U CN201220214991 U CN 201220214991U CN 202900099 U CN202900099 U CN 202900099U
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Abstract
The utility model relates to a wellhead device which is suitable for coal-bed gas well workover treatment, in particular to the wellhead device of a concentric double-skin tubular column reverse circulation continuous flushing coal powder system. The wellhead device of the concentric double-skin tubular column reverse circulation continuous flushing coal powder system comprises a moving inner pipe device, an outer pipe sealing device, a quick-change connecter, an O-shaped sealing ring, and a bolt. The wellhead device of the concentric double-skin tubular column reverse circulation continuous flushing coal powder system is characterized in that the wellhead device can move up and down following a lift sub, and therefore the wellhead device of the concentric double-skin tubular column reverse circulation continuous flushing coal powder system can flush coal powder as downward place tubular columns. The outer pipe sealing device can axially move along the moving inner pipe device, and sequential connection of an inner oil pipe and an outer oil pipe can be achieved through relative movement of the outer pipe sealing device. A moving sealing device moves up and down relative to the outer pipe, the flow direction of motive liquid and returning liquid can be changed through movement, and the moving sealing device ensures that the motive liquid and the returning liquid flow in respective flow passes. The wellhead device of the concentric double-skin tubular column reverse circulation continuous flushing coal powder system is novel in structure and convenient to operate. The wellhead device of the concentric double-skin tubular column reverse circulation continuous flushing coal powder system can realize connection of concentric double-skin tubular columns under the condition that a pump does not stop and improve efficiency of workover treatment at present.
Description
Technical field:
The utility model relates to a kind of wellhead assembly for coal bed gas well and low pressure leakage workover rig service to oil well system, belongs to workover treatment technique device class.
Background technology:
Coal bed gas well inevitably produces the solidity particles such as coal dust, coal tar, silt particle in the process of carrying out water pumping gas production.Because row's degree of gathering and processing is unreasonable, displacement is not enough, these solidity particles can not in time be got rid of pit shaft with well liquid, under the deposition of shaft bottom, generation are buried the phenomenons such as pump, holddown, and pause is adopted by the row of causing, and for the row of keeping adopts continuously, must carry out workover treatment.The on-the-spot main mode that adopts sand washing and machinery to drag for coal dust of coal bed gas extraction is pulled the shaft bottom coal dust out at present, and the former has than major injury storage, and latter's operating efficiency is lower, all can not satisfy the needs that the coal bed gas efficient discharge is adopted.Because the coal bed gas well bottom pressure is lower, adopt the mode well workover meeting of conventional hydrodynamic cleaning to cause the power fluid leakage serious in addition, destroy coal bed texture, affect the recovery of coal bed gas well production capacity.The utility model is exactly the wellhead assembly that provides new for addressing the above problem.
The utility model content:
The purpose of this utility model is: improve the efficient of present coal bed gas well workover treatment, in the situation in protection coal seam, provide a kind of wellhead assembly that can be used for continuous flushing shaft bottom coal dust.
The technical scheme that the utility model adopts is: the anti-continuous punching pulverized coal system wellhead assembly that circulates of concentric double pipe post comprises mobile inner tube device, outer tube sealing device, O-ring seals, hydraulic quick coupler, hydrodynamic reciprocating sealing pipe, bolt; Described mobile inner tube device is comprised of inner pipe joint I, shift joint, inner tube I, connection plug, inner tube and inner pipe joint, inner tube upper end with screw thread be connected plug and be connected, inner tube I upper and lower end respectively with screw thread and inner pipe joint I be connected plug and be connected, the shift joint inner headed face is connected with inner pipe joint I with screw thread; Described outer tube sealing device is comprised of outer tube joint I, outer tube I, footstock, hydrodynamic reciprocating sealing pipe, outer tube, outer tube joint and spring, the footstock periphery is connected with outer tube with screw thread, outer tube I lower end is connected with outer tube with screw thread, the inner tube that connects and inner tube I are inserted into outer tube inside along the center hole of footstock, outer tube joint I lower end inner headed face is connected with outer tube I with screw thread, outer tube joint upper end periphery is connected with outer tube with screw thread, and inner pipe joint upper end inner headed face is connected with inner tube with screw thread; Be separately installed with spring and hydrodynamic reciprocating sealing pipe between outer tube and inner tube, the hydrodynamic reciprocating sealing pipe can move up and down along outer tube inside; In the inner chamber of described mobile inner tube device as for outer tube sealing device composition, mobile inner tube device can move up and down 400～600mm by relatively outer tube sealing device, realizes the connection of concentric tube column; Two hydraulic quick couplers by bolton on the outer tube periphery.
During use, inner pipe joint is connected with the 2in inner oil tube with screw thread, and outer tube joint is connected (also can use similar oil pipe) with screw thread with the outer oil pipe of 3.5in.Pipe elevator blocks the outer tubing coupling of 3.5in, and the anti-continuous punching pulverized coal system wellhead assembly that circulates of concentric double pipe post can move up and down along with elevator like this, thereby realizes that the limit rushes the coal dust limit and transfers tubing string.Hydraulic quick coupler connects hose, the left side is the power fluid entrance, the right side is the outlet of returning fluid, high voltage power liquid from the ground handling pump enters in the annular space of outer tube and inner tube by the duct on the outer tube, the hydrodynamic reciprocating sealing pipe moves up under the effect of spring force, hydrodynamic reciprocating sealing pipe and footstock are tightly sealed, thereby guarantee that power fluid can only flow downward, enter the annular space of inside and outside oil pipe, continue to flow downward and arrive the down-hole and rush the coal dust instrument, rush the coal dust instrument by the down-hole and impact the shaft bottom coal dust, and the formation fluid that is mixed with coal dust is returned on inner oil tube, finally return out ground by returning fluid's outlet.
After having rushed an endowel, select identical 2in and the 3.5in oil pipe of length, with another one concentric double pipe post counter circulate continuous punching pulverized coal system wellhead assembly respectively with 2in, 3.5in oil pipe and hose are connected, by elevator it is sling, at pithead position, mobile inner tube device carries the 2in oil pipe and moves down along outer tube sealing device inside under action of gravitation, outside arriving, the shift joint of mobile inner tube device stops during the footstock position of tube sealing device, this moment, the 2in oil pipe can grow the about 200～300mm of 3.5in oil pipe (reserving working space to hydraulic pipe wrench), by hydraulic pipe wrench the 2in oil pipe was connected with the inner pipe joint I of upper level device; Slowly transfer elevator, mobile inner tube device maintains static, and outer tube sealing device is connected the 3.5in oil pipe behind the arrival certain position along with elevator slowly moves down with the outer tube I of upper level device, finish the connection of inside and outside oil pipe.Reversal valve makes power fluid flow to the power fluid entrance (lay down the hydraulic quick coupler of upper level device, transfer elevator, the outer tube sealing device of upper level and mobile inner tube device enter into oil well with oil pipe) of next stage device; Power fluid flows into the inside and outside oil pipe annular space of next stage, continues to flow to the outer tube sealing device of upper level downwards.Outside in the tube sealing device, power fluid flows downward by the duct on the footstock and runs into the hydrodynamic reciprocating sealing pipe, effect at fluid pressure, make hydrodynamic reciprocating sealing pipe Compress Spring and move down, set on the boss of outer tube joint, power fluid continues to flow downward by the axial annulus on the hydrodynamic reciprocating sealing pipe.
The coal dust that the shaft bottom has rushed upwards returns out by inner oil tube, flow to upper level and move the inner tube device, because the passage that makes progress is connected plug and blocks, returning fluid's body can only enter into by the duct on the inner tube annular space of inner tube and hydrodynamic reciprocating sealing pipe, returning fluid enters into inner tube I by the duct on the inner tube I, thereby continue upwards to return in the mobile inner tube device of pithead position, the duct of returning fluid by inner tube flows into hydrodynamic reciprocating sealing pipe lower end inner cylinder face and the annular space that inner tube forms, and finally exports by returning fluid and is discharged to ground.So move in circles, the shaft bottom coal dust drains only the most at last.
The utility model is reasonable in design, and is simple to operate, reliable operation, and this device and shaft bottom rush the coal dust instrument and match and realize that not termination of pumping arranges coal dust continuously, improve the efficient of present coal bed gas well workover treatment.
Description of drawings
Accompanying drawing 1 is looked the sectional structure schematic diagram for master of the present utility model, has mainly showed the anti-continuous punching pulverized coal system wellhead assembly inner body annexation that circulates of concentric double pipe post;
Accompanying drawing 2 is main TV structure schematic diagram of the present utility model;
Accompanying drawing 3 is the outer tube schematic diagram of sealing device, the annexation of specifically having showed each part in the outer tube sealing device;
Accompanying drawing 4 is mobile inner tube apparatus structure schematic diagram, the annexation of specifically having showed each part in the mobile inner tube device;
Accompanying drawing 5 is the structural representation of hydrodynamic reciprocating sealing pipe, and hydrodynamic reciprocating sealing pipe upper end boss matches with the outer tube interior grooves, and assurance vertical axial duct, hydrodynamic reciprocating sealing pipe lower end exports with returning fluid aligns;
Accompanying drawing 6 is the X-Y scheme of outer tube, and there are two columniform boss the side of outer tube, is designed with the duct in the boss, is respectively the entrance of power fluid and the outlet of returning fluid; Outer pipe internal surface is designed with groove;
Accompanying drawing 7 is the three-dimensional structure schematic diagram of hydraulic quick coupler.
The specific embodiment
The utility model is provided by following instance, below in conjunction with accompanying drawing the utility model is described further.
1, the utility model comprises mobile inner tube device, outer tube sealing device, O-ring seals (10), (11), (12), (14), (18), hydraulic quick coupler (15), hydrodynamic reciprocating sealing pipe (17), bolt (20) as depicted in figs. 1 and 2; Described mobile inner tube device is comprised of inner pipe joint I (1), shift joint (3), inner tube I (4), connection plug (13), inner tube (16) and inner pipe joint (9), inner tube (16) upper end with screw thread be connected plug (13) and be connected, inner tube I (4) upper and lower end respectively with screw thread and inner pipe joint I (1) be connected plug (13) and be connected, shift joint (3) inner headed face is connected with inner pipe joint I (1) with screw thread; Described outer tube sealing device is by outer tube joint I (2), outer tube I (5), footstock (6), hydrodynamic reciprocating sealing pipe (17), outer tube (7), outer tube joint (19) and spring (8) form, footstock (6) periphery is connected with outer tube (7) with screw thread, outer tube I (5) lower end is connected with outer tube (7) with screw thread, the inner tube (16) that connects and inner tube I (4) are inserted into outer tube (7) inside along the center hole of footstock (6), outer tube joint I (2) lower end inner headed face is connected with outer tube I (5) with screw thread, outer tube joint (19) upper end periphery is connected with outer tube (7) with screw thread, inner pipe joint (9) upper end inner headed face is connected with inner tube (16) with screw thread, be separately installed with spring (8) and hydrodynamic reciprocating sealing pipe (17) between outer tube (7) and the inner tube (16), hydrodynamic reciprocating sealing pipe (17) can move up and down along outer tube (7) inside; In the inner chamber of described mobile inner tube device as for outer tube sealing device composition, mobile inner tube device can move up and down 400～600mm by relatively outer tube sealing device, realizes the connection of concentric tube column; Two hydraulic quick couplers (15) are fastened on outer tube (7) periphery by bolt (20).
When 2, using, inner pipe joint 9 is connected with the 2in inner oil tube with screw thread, and outer tube joint 19 is connected with the outer oil pipe of 3.5in with screw thread.Pipe elevator blocks the 3.5in tubing coupling, and the anti-continuous punching pulverized coal system wellhead assembly that circulates of concentric double pipe post can move up and down along with elevator like this, thereby realizes that the limit rushes the coal dust limit and transfers tubing string.
3, after having rushed an endowel, select identical 2in and the 3.5in oil pipe of length, with another one concentric double pipe post counter circulate continuous punching pulverized coal system wellhead assembly respectively with 2in, 3.5in oil pipe and hose are connected, by elevator it is sling, at pithead position, mobile inner tube device carries the 2in oil pipe and moves down along outer tube sealing device inside under action of gravitation, when arriving footstock 6 position, shift joint 3 stops, this moment, the 2in oil pipe can grow the about 200～300mm of 3.5in oil pipe (reserving working space to hydraulic pipe wrench), by hydraulic pipe wrench the 2in oil pipe was connected with the inner pipe joint I1 of upper level device; Slowly transfer elevator, mobile inner tube device maintains static, outer tube sealing device is along with elevator slowly moves down, after arriving certain position the 3.5in oil pipe is connected with the outer tube I5 of upper level device, finish the connection of inside and outside oil pipe, lay down the hydraulic quick coupler 15 of upper level device, transfer elevator, the outer tube sealing device of upper level and mobile inner tube device enter into oil well with oil pipe, thereby realize continuing to rush coal dust.
Claims (4)
1. the anti-continuous punching pulverized coal system wellhead assembly that circulates of concentric double pipe post is characterized in that: mainly be comprised of mobile inner tube device, outer tube sealing device, O-ring seals (10,11,12,14,18), hydraulic quick coupler (15), hydrodynamic reciprocating sealing pipe (17) and bolt (20); Described mobile inner tube device is comprised of inner pipe joint I (1), shift joint (3), inner tube I (4), connection plug (13), inner tube (16) and inner pipe joint (9), inner tube (16) upper end with screw thread be connected plug (13) and be connected, inner tube I (4) upper and lower end respectively with screw thread and inner pipe joint I (1) be connected plug (13) and be connected, shift joint (3) inner headed face is connected with inner pipe joint I (1) with screw thread; Described outer tube sealing device is by outer tube joint I (2), outer tube I (5), footstock (6), hydrodynamic reciprocating sealing pipe (17), outer tube (7), outer tube joint (19) and spring (8) form, footstock (6) periphery is connected with outer tube (7) with screw thread, outer tube I (5) lower end is connected with outer tube (7) with screw thread, the inner tube (16) that connects and inner tube I (4) are inserted into outer tube (7) inside along the center hole of footstock (6), outer tube joint I (2) lower end inner headed face is connected with outer tube I (5) with screw thread, outer tube joint (19) upper end periphery is connected with outer tube (7) with screw thread, inner pipe joint (9) upper end inner headed face is connected with inner tube (16) with screw thread, be separately installed with spring (8) and hydrodynamic reciprocating sealing pipe (17) between outer tube (7) and the inner tube (16), hydrodynamic reciprocating sealing pipe (17) can move up and down along outer tube (7) inside; In the inner chamber of described mobile inner tube device as for outer tube sealing device composition; Two hydraulic quick couplers (15) are fastened on outer tube (7) periphery by bolt (20).
2. the anti-continuous punching pulverized coal system wellhead assembly that circulates of concentric double pipe post according to claim 1 is characterized in that there are two columniform boss the side of outer tube (7), is designed with the duct in the boss; Hydraulic quick coupler (15) is fastened on outer tube (7) periphery by bolt (20); Outer tube (7) inner surface is designed with groove.
3. the anti-continuous punching pulverized coal system wellhead assembly that circulates of concentric double pipe post according to claim 1, it is characterized in that hydrodynamic reciprocating sealing pipe (17) upper end boss matches with outer tube (7) interior grooves, aligns with the power fluid entrance in assurance vertical axial duct, hydrodynamic reciprocating sealing pipe (17) lower end.
4. the anti-continuous punching pulverized coal system wellhead assembly that circulates of concentric double pipe post according to claim 1 is characterized in that mobile inner tube device can move up and down 400mm～600mm by relatively outer tube sealing device, realizes the connection of concentric tube column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220214991 CN202900099U (en) | 2012-05-10 | 2012-05-10 | Wellhead device of concentric double-skin tubular column reverse circulation continuous flushing coal powder system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220214991 CN202900099U (en) | 2012-05-10 | 2012-05-10 | Wellhead device of concentric double-skin tubular column reverse circulation continuous flushing coal powder system |
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| Publication Number | Publication Date |
|---|---|
| CN202900099U true CN202900099U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220214991 Expired - Fee Related CN202900099U (en) | 2012-05-10 | 2012-05-10 | Wellhead device of concentric double-skin tubular column reverse circulation continuous flushing coal powder system |
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| Country | Link |
|---|---|
| CN (1) | CN202900099U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388464A (en) * | 2012-05-10 | 2013-11-13 | 中国石油大学(华东) | Concentric double pipe column reverse circulation continuous coal dust washing system well head device |
| CN105201430A (en) * | 2015-10-26 | 2015-12-30 | 东北石油大学 | Turbine drive cuttings bed cleaning device |
| CN106837291A (en) * | 2017-02-17 | 2017-06-13 | 中国石油大学(华东) | Oil jacket annular space gas-liquid separation device in non-conventional gas well head |
-
2012
- 2012-05-10 CN CN 201220214991 patent/CN202900099U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388464A (en) * | 2012-05-10 | 2013-11-13 | 中国石油大学(华东) | Concentric double pipe column reverse circulation continuous coal dust washing system well head device |
| CN105201430A (en) * | 2015-10-26 | 2015-12-30 | 东北石油大学 | Turbine drive cuttings bed cleaning device |
| CN105201430B (en) * | 2015-10-26 | 2017-11-10 | 东北石油大学 | Turbine drives cutting bed remove device |
| CN106837291A (en) * | 2017-02-17 | 2017-06-13 | 中国石油大学(华东) | Oil jacket annular space gas-liquid separation device in non-conventional gas well head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20140510 |