CN203201486U - Casing pipe device for mining area coal-bed gas well on ground - Google Patents
Casing pipe device for mining area coal-bed gas well on ground Download PDFInfo
- Publication number
- CN203201486U CN203201486U CN 201320194205 CN201320194205U CN203201486U CN 203201486 U CN203201486 U CN 203201486U CN 201320194205 CN201320194205 CN 201320194205 CN 201320194205 U CN201320194205 U CN 201320194205U CN 203201486 U CN203201486 U CN 203201486U
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- casing pipe
- production casing
- bed gas
- fixture block
- coal bed
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Abstract
The utility model discloses a casing pipe device for a mining area coal-bed gas well on the ground. The device comprises a production casing pipe, an annular hanging sleeve is arranged on the outer side of the upper end of the production casing pipe, at least one clamping block is further arranged at the lower end of the annular hanging sleeve on the production casing pipe, and a thread connecting structure is further arranged at the upper end of the production casing pipe. The device further comprises a second-section casing pipe, and a stopping block matched with the space on the side portion of the clamping block is arranged on the inner side of the lower end of the second-section casing pipe. Due to the fact that the casing pipe device for the mining area coal-bed gas well on the ground is adopted, when the production casing pipe is moved downwards and hung, the drilling three-section process cannot be affected, the production casing pipe can be smoothly and accurately moved downwards and hung to a preset position through a drill rod of a drill machine; due to the fact that the stopping block and the annular hanging sleeve are matched, the production casing pipe can be hung stably for a long time, influences on the production casing pipe caused by rack-overlaid strata moving in the mining process are avoided, and the extracting process is stable. Meanwhile, because of the casing pipe device for the mining area coal-bed gas well on the ground, the moving-downward and hanging process of the production casing pipe is simple, and the casing pipe device for the mining area coal-bed gas well on the ground is convenient to construct, safe, reliable and wide in applicability.
Description
Technical field
The utility model relates to coal bed gas well, particularly a kind of minery ground coal bed gas casing device.
Background technology
The extraction of minery ground coal bed gas refer to coal-face be pushed into that the surface well certain distance begins and along with the coal-face progradation in, adopting the technology of carrying out the coal bed gas extraction under the unload effects.
Three grades of sleeve structures of the many employings of minery ground coal bed gas well wherein one are driven sleeve pipe to position, the topsoil left and right sides, and two drive sleeve pipe from the earth's surface to crooked lower floor band bottom, and three drive screen casing (being production casing) opens sleeve bottom to top, coal seam 3～5m from two.Because one opens junction that sleeve pipe and two leaves sleeve pipe and drilling rod on ground, thus one open sleeve pipe and two open sleeve pipe to transfer difficulty low, transfer and fixedly be easier to.Hang on two and open the sleeve pipe lower end but three open the screen casing requirement, therefore three open position that screen casing is connected with drilling rod in depth time, three open screen casing to transfer and hang difficulty large; Overlying strata can sink after the back production of coal seam, do not hang live three drive screen casing and will sink, have influence on the extraction coal bed gas.And serve petroleum industry for the treatment of the suspension arrangement of production casing at present more, it has its unworthiness for the cbm development industry.
The utility model content
In view of this, the purpose of this utility model provides a kind of minery ground coal bed gas casing device, transfers the large problem of difficulty that hangs with the production casing that solution cbm development industry exists.
The utility model minery ground coal bed gas casing device, comprise production casing, the upper end arranged outside of described production casing has annular hanging sleeve, lower end at annular hanging sleeve on the described production casing also is provided with at least one fixture block, also is provided with screw connection structure on the upper end of described production casing.
Further, the double thread pipe nipple of described screw connection structure for being threaded with production casing, perhaps described screw connection structure is the screw thread pair that is arranged on the production casing upper end, and perhaps described screw connection structure is the one start screw pipe nipple that plain end is welded on the production casing upper end;
Further, described fixture block is lower little large circular cone;
Further, described fixture block is that four and fixture block are equidistantly arranged in a circumferential direction;
Further, described minery ground coal bed gas casing device comprises that also two drive sleeve pipe, and described two open inboard, sleeve pipe lower end is provided with the block that cooperates with the fixture block side spaces;
Further, described annular hanging sleeve, fixture block and block are made by the N80 steel;
Further, described annular hanging sleeve and fixture block are welded on the production casing, and described block is welded on two and opens on the sleeve pipe.
The beneficial effects of the utility model: this minery ground coal bed gas casing device, transferring the suspension production casing can be not influential to creeping into three open procedures, can accurately transfer smoothly the suspension production casing to the precalculated position by borer drill rod, block and annular hanging sleeve cooperate can make production casing be hung by steady in a long-term, avoid rock stratum in the coal mining process to move impact on production casing, extraction process stabilization; Simultaneously to hang technique simple so that production casing is transferred for this device, and easy construction is safe and reliable, has widely practicality.
Description of drawings
Fig. 1 is the structural representation of minery ground coal bed gas casing device;
Fig. 2 two opens the transverse sectional view of sleeve pipe and production casing connecting portion.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in the figure, the present embodiment minery ground coal bed gas casing device, comprise production casing 3, the upper end arranged outside of described production casing 3 has annular hanging sleeve 4, lower end at annular hanging sleeve 4 on the described production casing 3 also is provided with at least one fixture block 5, also is provided with screw connection structure 6 on the upper end of described production casing 3.
Annular hanging sleeve 4 is used for production casing 3 is hung on two lower ends of driving sleeve pipe 1; Screw connection structure 6 is used for jointed rod, to realize by drilling rod below production casing 3; Fixture block 5 is used for stoping production casing 3 to produce rotation after putting in place transferring, and screws out from screw connection structure 6 smoothly to realize drilling rod; Fixture block described in the present embodiment 5 is that four and fixture block 5 are equidistantly arranged in a circumferential direction, is convenient to smooth centering production casing 3 position in a circumferential direction.
As the improvement to the present embodiment, the double thread pipe nipple of described screw connection structure 6 for being threaded with production casing 3, because production casing 3 of the prior art is typical construction, production casing 3 and the drilling rod coupling that can easily difference be stipulated by nipple joint is set.Certainly in different embodiments, described screw connection structure 6 also can be the screw thread pair that is arranged on production casing 3 upper ends, and this structure is so that production casing 3 can directly be connected with drilling rod, and structure is simpler, but needs to produce special production casing 3; And described screw connection structure 6 also can be the one start screw pipe nipple that plain end is welded on production casing 3 upper ends, but difficult in production casing 3 upper ends welding nipple joint technique.
As the improvement to this enforcement, described fixture block 5 is lower little large circular cone, and this structure is conducive to the assembly connection of fixture block 5, can improve the operating efficiency of transferring production casing 3.
As the improvement to this enforcement, this minery ground coal bed gas casing device comprises that also two drive sleeve pipe 1, and described two open inboard, sleeve pipe 1 lower end is provided with the block 2 that cooperates with fixture block 5 side spaces.In the process of transferring production casing 3, at fixture block 5 during near block 2, can make fast fixture block 5 centering positions and insert between the adjacent blockers 2 by the rig slow circumvolve, after annular hanging sleeve 4 is placed into the upper end of block 2, rig rotates drilling rod 7, and production casing 3 does not rotate under the barrier effect of block 2, and nipple joint is tightened on the production casing 3, drilling rod 7 is carried after nipple joint screws out, and namely realizes transferring suspension production casing 3.
As the improvement to this enforcement, described annular hanging sleeve 4, fixture block 5 and block 2 are made by the N80 steel, and N80 steel density is high, and pressure resistance has good welding performance, can guarantee the production casing sprung mass.
As the improvement to this enforcement, described annular hanging sleeve 4 and fixture block 5 are welded on the production casing 3, described block 2 is welded on two and opens on the sleeve pipe 1, welding quality is abideed by the requirement of oil gas pipeline qualification of welding procedure method (SY ∕ T0452-2002) and is carried out, bonding strength is high, can guarantee that the long-term hanger attachment portion of production casing is not for damaging.
The below describes this minery ground coal bed gas casing device in detail and transfers the detailed process that generates sleeve pipe, and it may further comprise the steps:
A, open at least one block 2 of inboards welding of the lower end of sleeve pipe 1 two in advance, block 2 is 4 of being arranged symmetrically with in the present embodiment, then transfers two and opens sleeve pipe 1 and well cementation, drives sleeve pipe 1 until two and bores discharge hole under the production casing after fixing;
B, in advance at the annular hanging sleeve 4 of production casing 3 upper ends outside welding, and at least one fixture block 5 of annular hanging sleeve 4 downsides welding, fixture block 5 be equidistant four of layout in the present embodiment;
C, be threaded connection structure 6 and connect production casing 3 and drilling rods 7;
D, transfer production casing 3 with drilling rod 7, on the sleeve pipe 3 to be produced fixture block 5 near two open on the sleeve pipe 1 block 2 time, slowly rotate drilling rod 7 by rig fixture block 5 is inserted in block 2 side spaces, and the annular hanging sleeve 4 on the production casing 3 is placed on the upper surface of block 2;
E, continue to rotate drilling rod 7 by rig, under the barrier effect of block 7, drilling rod 7 separated with production casing 3, on carry drilling rod 7, production casing is transferred and is finished.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (7)
1. minery ground coal bed gas casing device, comprise production casing, it is characterized in that: the upper end arranged outside of described production casing has annular hanging sleeve, lower end at annular hanging sleeve on the described production casing also is provided with at least one fixture block, also is provided with screw connection structure on the upper end of described production casing.
2. minery ground coal bed gas casing device according to claim 1, it is characterized in that: the double thread pipe nipple of described screw connection structure for being threaded with production casing, perhaps described screw connection structure is the screw thread pair that is arranged on the production casing upper end, and perhaps described screw connection structure is the one start screw pipe nipple that plain end is welded on the production casing upper end.
3. minery ground coal bed gas casing device according to claim 2, it is characterized in that: described fixture block is lower little large circular cone.
4. minery ground coal bed gas casing device according to claim 3 is characterized in that: described fixture block is that four and fixture block are equidistantly arranged in a circumferential direction.
5. arbitrary described minery ground coal bed gas casing device according to claim 1-4 is characterized in that: comprise that also two drive sleeve pipe, described two open inboard, sleeve pipe lower end is provided with the block that cooperates with the fixture block side spaces.
6. minery ground coal bed gas casing device according to claim 5, it is characterized in that: described annular hanging sleeve, fixture block and block are made by the N80 steel.
7. minery ground coal bed gas casing device according to claim 6, it is characterized in that: described annular hanging sleeve and fixture block are welded on the production casing, and described block is welded on two and opens on the sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194205 CN203201486U (en) | 2013-04-17 | 2013-04-17 | Casing pipe device for mining area coal-bed gas well on ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194205 CN203201486U (en) | 2013-04-17 | 2013-04-17 | Casing pipe device for mining area coal-bed gas well on ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203201486U true CN203201486U (en) | 2013-09-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320194205 Expired - Lifetime CN203201486U (en) | 2013-04-17 | 2013-04-17 | Casing pipe device for mining area coal-bed gas well on ground |
Country Status (1)
| Country | Link |
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| CN (1) | CN203201486U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233694A (en) * | 2013-04-17 | 2013-08-07 | 中煤科工集团重庆研究院 | Method for descending and suspending production casing for mining area ground coal-bed gas well and casing device |
| CN104895531A (en) * | 2015-04-30 | 2015-09-09 | 山西蓝焰煤层气集团有限责任公司 | Single thick coal seam ground mining well extraction process |
| CN106884673A (en) * | 2017-02-25 | 2017-06-23 | 太原理工大学 | A kind of method that goaf coal bed gas pinpoints efficient extraction |
| CN108331560A (en) * | 2018-01-29 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | A kind of coal bed gas surface well pumping method of minery containing water flooding |
-
2013
- 2013-04-17 CN CN 201320194205 patent/CN203201486U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233694A (en) * | 2013-04-17 | 2013-08-07 | 中煤科工集团重庆研究院 | Method for descending and suspending production casing for mining area ground coal-bed gas well and casing device |
| CN103233694B (en) * | 2013-04-17 | 2015-12-09 | 中煤科工集团重庆研究院有限公司 | Transfer the method and casing bit that hang minery ground coal bed gas well production casing |
| CN104895531A (en) * | 2015-04-30 | 2015-09-09 | 山西蓝焰煤层气集团有限责任公司 | Single thick coal seam ground mining well extraction process |
| CN106884673A (en) * | 2017-02-25 | 2017-06-23 | 太原理工大学 | A kind of method that goaf coal bed gas pinpoints efficient extraction |
| CN106884673B (en) * | 2017-02-25 | 2019-11-12 | 太原理工大学 | A kind of method that goaf coal bed gas pinpoints efficient extraction |
| CN108331560A (en) * | 2018-01-29 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | A kind of coal bed gas surface well pumping method of minery containing water flooding |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |