CN2129816Y - Inner coated layer rock core tube capable of increasing core length taking - Google Patents
Inner coated layer rock core tube capable of increasing core length taking Download PDFInfo
- Publication number
- CN2129816Y CN2129816Y CN 92225857 CN92225857U CN2129816Y CN 2129816 Y CN2129816 Y CN 2129816Y CN 92225857 CN92225857 CN 92225857 CN 92225857 U CN92225857 U CN 92225857U CN 2129816 Y CN2129816 Y CN 2129816Y
- Authority
- CN
- China
- Prior art keywords
- core
- rock core
- core tube
- coated layer
- taking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Laminated Bodies (AREA)
Abstract
The utility model belongs to an improvement of the structure of an inner rock core tube of a coring tool in a drilling well. The utility model adopts the inner surface of steel inside core tube to spray a layer of epoxy powder of 0.1-0.6 mm, and thus the inner wall coated layer of the steel inner cylinder is homogeneous, smooth, and firm. In consequence, a low friction rock core tube capable of decreasing the resistance force to enter the rock core tube in the core drilling is obtained, in favor of increasing the length of taking core, and improving the efficiency of taking core. The effect of taking core on the loose ground is especially obvious.
Description
The utility model belongs to the improvement of drilling and coring delivery instrument inner barrel structure.
At present, the inner barrel of general drilling and coring delivery instrument all is to adopt seamless guiding principle pipe to be formed by connecting.Because the higher and steel pipe inner wall coarse of friction factor of steel, to advance the resistance of tube very big for rock core when causing core-drilling, causes the stifled card of rock core easily, has a strong impact on the increase of the length of coring.In recent years, though the pipe fitting that has various composite materials such as glass fiber reinforced plastic, plastics to constitute is done inner barrel, its manufacturing process complexity, the cost height, the scope of application is limited.
In order to overcome above-mentioned shortcoming, increase the length of coring simple and effectively, the utility model adopts the wear-resisting resistance-lowering material at steel inner barrel inner surface spraying one deck 0.1-0.6mm.The epoxide powder coating that wear-resisting resistance-lowering material is made up of epoxy resin, curing compound, filler.
Description of drawings:
Fig. 1 can increase the undercoating core barrel schematic diagram of the length of coring
1, undercoating core barrel 2, undercoating 3, urceolus
4, core bit 5, rock core grab 6, rock core
Now the utility model will be further described in conjunction with the accompanying drawings:
Undercoating core barrel (1) places among the coring tool urceolus (3), in the core-drilling process, increase along with coring footage, the corresponding growth of rock core (6) length, and grab (5) by core bit (4), rock core and enter the undercoating core barrel, rock core is inevitable with contacting of undercoating core barrel inwall, and just under this contact conditions, rock core is from undercoating core barrel bottom, in progressing into, top.Because core barrel undercoating (2) is a kind ofly can change the body surface performance, reduces the lubricious of its friction factor, rock core by the time resistance just more than there not being low many of internally coated core barrel, thereby it is tin more smooth that rock core advances.Thus, both can prolong normal drilling time, increase coring footage, increase rock core length; Can reduce the rock core loss again, improve core recovery, finally reach the purpose that can effectively increase the length of coring.
Because the utility model has adopted and can change the body surface performance, reducing the material of its friction factor---epoxy powder is sprayed at the inwall of steel inner barrel commonly used, coating is smooth, even, firm, thereby can obtain in the core-drilling process, can reduce the low frictional resistance core barrel that rock core advances a resistance, the increase of the length that helps coring.Core at broken ground, effect is particularly evident.
The coating epoxy powder material that the utility model adopts belongs to the thermosetting non-toxic coatings.Spraying coating process is conventional pipeline spraying coating process---static hot-spraying technique, and is simple and practical, also is easy to promote.
Claims (1)
1, a kind of undercoating core barrel that can increase the length of coring.It is characterized in that forming at the wear-resisting resistance-lowering material of steel inner barrel inner surface spraying one deck 0.1-0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225857 CN2129816Y (en) | 1992-06-24 | 1992-06-24 | Inner coated layer rock core tube capable of increasing core length taking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225857 CN2129816Y (en) | 1992-06-24 | 1992-06-24 | Inner coated layer rock core tube capable of increasing core length taking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2129816Y true CN2129816Y (en) | 1993-04-14 |
Family
ID=33770390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92225857 Expired - Fee Related CN2129816Y (en) | 1992-06-24 | 1992-06-24 | Inner coated layer rock core tube capable of increasing core length taking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2129816Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058315C (en) * | 1994-07-21 | 2000-11-08 | 胜利石油管理局钻井工艺研究院 | Composite-material core barrel |
| CN103257101A (en) * | 2013-05-24 | 2013-08-21 | 中国石油大学(北京) | Coating-containing core as well as core holder anti-corrosion method and core displacement experiment method |
| CN107829691A (en) * | 2017-09-25 | 2018-03-23 | 北京探矿工程研究所 | Core tube with internal coating |
| CN109113611A (en) * | 2018-08-13 | 2019-01-01 | 四川大学 | Core fidelity cabin with temperature incubation function |
-
1992
- 1992-06-24 CN CN 92225857 patent/CN2129816Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058315C (en) * | 1994-07-21 | 2000-11-08 | 胜利石油管理局钻井工艺研究院 | Composite-material core barrel |
| CN103257101A (en) * | 2013-05-24 | 2013-08-21 | 中国石油大学(北京) | Coating-containing core as well as core holder anti-corrosion method and core displacement experiment method |
| CN107829691A (en) * | 2017-09-25 | 2018-03-23 | 北京探矿工程研究所 | Core tube with internal coating |
| CN109113611A (en) * | 2018-08-13 | 2019-01-01 | 四川大学 | Core fidelity cabin with temperature incubation function |
| CN109113611B (en) * | 2018-08-13 | 2023-08-22 | 四川大学 | Rock core fidelity cabin with constant temperature function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |