CN205577870U - Coal bed gas horizontal well large aperture supports tubular column - Google Patents
Coal bed gas horizontal well large aperture supports tubular column Download PDFInfo
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- CN205577870U CN205577870U CN201620358680.9U CN201620358680U CN205577870U CN 205577870 U CN205577870 U CN 205577870U CN 201620358680 U CN201620358680 U CN 201620358680U CN 205577870 U CN205577870 U CN 205577870U
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- guide shoe
- bed gas
- horizontal well
- coal bed
- large aperture
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Abstract
The utility model provides a coal bed gas horizontal well large aperture supports tubular column, including supporting tubular column and guide shoe, support the stay tube that the tubular column includes many end to end, guide shoe and support pipe thread connection foremost, it has the through -hole to open on the support pipe wall, the guide shoe is coniformly. A coal bed gas horizontal well large aperture supports tubular column open hole area than big, intensity is high, can not only support the wall of a well, prevents to cave in, but also can the effectual coal ash (bits) of carrying outside, the guide shoe can prevent to support the tubular column goes into under in in -process coal ash (bits) gets into the stay tube from the circulation hole of guide shoe, the jam tubular column satisfies the production demand of coal bed gas L type horizontal well coal reservoir reaming transformation.
Description
Technical field
This utility model belongs to Coal-seam Gas Recovery Technologies field, especially relates to a kind of coal bed gas horizontal well big
Aperture support tube column.
Background technology
China has abundant coal bed gas resource, but great majority belong to low-porosity and low-permeability reservoir, utilizes routine
Horizontal well carry out ground mining, generally there is the problems such as gas output per well is low, development effectiveness is poor.At present,
The main path improving coal bed gas horizontal well yield is to use hydraulic fracturing technology, through post-fracturing coal seam,
Its internal appearance is numerous and extends crack farther out, and when extraction coal bed gas, large area occurs in wellbore
Pressure decline, coal seam by blood pressure lowering affected produce gas desorption surface area increase, it is ensured that coal bed gas produce
Amount increases substantially.Owing to the coal-bearing strata of China the most all experienced by the strong tectonic movement after coal-forming,
The cleat in coal seam is greatly enhanced by heavy damage, plastic degeneration, becomes the high ductility knot of hypotonicity
Structure.When fracturing acts on this kind of coal seam, can not extension further to preexisting crack, can not
Produce new rupturing or crack, and plastic deformation mainly occurs in coal seam, it is impossible to reach preferable pressure break
Effect.Transform for L-type horizontal well coal seam reservoirs reaming, use large aperture support tube column completion, on ground
Cause a range of pressure oscillation of horizontal seam section with air compressor machine, supercharger etc., horizontal seam section is entered
Row aerodynamic force makes seam ream operation, makes horizontal segment coal seam produce and caves in, and forms certain crack, coal seam.
This process drilling fluid contamination in eliminating drilling process, adds uncovering coal plane and amasss, and is formed broken
Band, while strengthening flow conductivity, is defined certain crack interference fringe, and is let out by supercharging repeatedly
Pressure, washes out the coal ash in interference fringe crack, forms a large range of high permeability zones；Finally utilize and penetrate
Stream device, cleans the cave in ickings outside screen casing and coal ash.And conventional screen aperture is little, wall is thin, mechanical
Intensity is low, it is impossible to carries the coal ash (considering to be worth doing) of bulk outside, easily blocks, it is impossible to meets coal bed gas L-type level
The demand of well coal seam reservoirs reaming transformation.
Utility model content
In view of this, this utility model is directed to a kind of coal bed gas horizontal well large aperture support tube column, with
Solve existing screen casing and cannot meet the demand of coal bed gas L-type horizontal well coal seam reservoirs reaming transformation.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
A kind of coal bed gas horizontal well large aperture support tube column, including support tube column and guide shoe, described stay tube
Post includes that many end to end stay tubes, described guide shoe and a stay tube foremost are threaded, described
Supporting and have through hole on tube wall, described guide shoe is coniform.
Further, described through hole is supporting equidistant Spiral distribution on tube wall, and the line number of spiral is 1～4.
Further, described through hole is provided with 16～150 on the support tube wall of every meter.
Further, described through hole is waist-shaped hole, hole width 6mm～12mm, compares square hole and circular hole reduces
Stress concentration, perforated area is big, and support strength is high..
Further, the bus length that the guide surface of described guide shoe is corresponding is more than the radius of guide shoe.
Further, the external diameter of described the stay tube internal diameter more than guide shoe and the external diameter less than guide shoe.
Relative to prior art, coal bed gas horizontal well large aperture described in the utility model support tube column has
Following advantage:
A kind of coal bed gas horizontal well large aperture described in the utility model support tube column perforated area ratio is big, by force
Degree height, can not only support the borehole wall, prevent from caving in, and can also effectively carry coal ash (considering to be worth doing) outside, and length is drawn
Guide face is conducive under lower going-into-well, be possible to prevent support tube column under enter during coal ash (considering to be worth doing) enter from guide shoe
Entering in a stay tube, blocking tubing string meets the Production requirement of coal bed gas L-type horizontal well coal seam reservoirs reaming transformation.
Accompanying drawing explanation
The accompanying drawing constituting a part of the present utility model is further appreciated by of the present utility model for providing,
Schematic description and description of the present utility model is used for explaining this utility model, is not intended that this reality
With novel improper restriction.In the accompanying drawings:
Fig. 1 is the structural representation described in this utility model embodiment；
Fig. 2 is the structural representation of the stay tube described in this utility model embodiment
Fig. 3 is the structural representation of the guide shoe described in this utility model embodiment.
Description of reference numerals:
1-props up stay tube, 2-guide shoe.
Detailed description of the invention
It should be noted that in the case of not conflicting, in embodiment in this utility model and embodiment
Feature can be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " horizontal stroke
To ", " on ", D score, "front", "rear", "left", "right", " vertically ", " water
Flat ", the orientation that indicates of " top ", " end ", " interior ", " outward " etc. or position relationship be based on attached
Orientation shown in figure or position relationship, be for only for ease of description this utility model and simplify description, and not
Be instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second "
Etc. being only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate indication
The quantity of the technical characteristic shown.Thus, the feature defining " first ", " second " etc. can be expressed
Or implicitly include one or more this feature.In description of the present utility model, unless otherwise
Illustrating, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited,
Term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing,
Can also be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；
Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the company of two element internals
Logical.For the ordinary skill in the art, can understand that above-mentioned term is at this by concrete condition
Concrete meaning in utility model.
Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As it is shown in figure 1, a kind of coal bed gas horizontal well large aperture support tube column, including support tube column 1 with draw
Footwear 2, described support tube column 1 includes many end to end stay tubes, described guide shoe 2 and foremost
Propping up stay tube threaded, support tube column is sat by special hanger and is hung on upper layer techniques sleeve pipe, described
Having through hole on stay tube wall, described through hole is supporting equidistant Spiral distribution on tube wall, the line number of spiral be 1～
4, described through hole is provided with 16～150 on the support tube wall of every meter, and described through hole is waist-shaped hole, hole
Wide 6mm～12mm, compares square hole and circular hole reduces stress and concentrates, and perforated area is big, and support strength is high.
Described guide shoe 2 is in coniform.Bus length corresponding to the guide surface of described guide shoe 2 is more than the radius of guide shoe.
The external diameter of described the stay tube internal diameter more than guide shoe 2 and the external diameter less than guide shoe 2.
A kind of coal bed gas horizontal well large aperture described in the utility model support tube column, is using special ejector
In cleaning process, coal ash (considering to be worth doing) can smoothly enter in support tube column, by cleaning tubing string and a stay tube
The annular space of post is upwards migrated, and reaches the purpose of cleaning well smooth, quick.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model,
All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made,
Within should be included in protection domain of the present utility model.
Claims (6)
1. coal bed gas horizontal well large aperture support tube column, it is characterised in that: include support tube column (1) and
Guide shoe (2), described support tube column (1) includes many end to end stay tubes, described guide shoe (2)
Stay tube foremost is threaded, and described support tube wall has through hole, described guide shoe (2) in
Coniform.
Coal bed gas horizontal well large aperture the most according to claim 1 support tube column, it is characterised in that:
Described through hole is supporting equidistant Spiral distribution on tube wall, and the line number of spiral is 1～4.
Coal bed gas horizontal well large aperture the most according to claim 1 support tube column, it is characterised in that:
Described through hole is provided with 16～150 on the support tube wall of every meter.
Coal bed gas horizontal well large aperture the most according to claim 1 support tube column, it is characterised in that:
Described through hole is waist-shaped hole, hole width 6mm～12mm.
Coal bed gas horizontal well large aperture the most according to claim 1 support tube column, it is characterised in that:
Bus length corresponding to the guide surface of described guide shoe (2) is more than the radius of guide shoe.
Coal bed gas horizontal well large aperture the most according to claim 1 support tube column, it is characterised in that:
The external diameter of described the stay tube internal diameter more than guide shoe (2) and the external diameter less than guide shoe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620358680.9U CN205577870U (en) | 2016-04-25 | 2016-04-25 | Coal bed gas horizontal well large aperture supports tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620358680.9U CN205577870U (en) | 2016-04-25 | 2016-04-25 | Coal bed gas horizontal well large aperture supports tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205577870U true CN205577870U (en) | 2016-09-14 |
Family
ID=56860251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620358680.9U Active CN205577870U (en) | 2016-04-25 | 2016-04-25 | Coal bed gas horizontal well large aperture supports tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205577870U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332899A (en) * | 2018-02-28 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | Pressure equalizing, ventilating, drilling and measuring device for coal mine |
| CN114427354A (en) * | 2020-10-15 | 2022-05-03 | 中国石油化工股份有限公司 | Ultra-deep oil and gas well supporting tube and manufacturing method thereof |
-
2016
- 2016-04-25 CN CN201620358680.9U patent/CN205577870U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332899A (en) * | 2018-02-28 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | Pressure equalizing, ventilating, drilling and measuring device for coal mine |
| CN114427354A (en) * | 2020-10-15 | 2022-05-03 | 中国石油化工股份有限公司 | Ultra-deep oil and gas well supporting tube and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211025 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: No.106 Huanghai Road, Binhai New Economic and Technological Development Zone, Tianjin 300457 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |