CA2521287A1 - Dual wall drill string assembly - Google Patents
Dual wall drill string assembly Download PDFInfo
- Publication number
- CA2521287A1 CA2521287A1 CA 2521287 CA2521287A CA2521287A1 CA 2521287 A1 CA2521287 A1 CA 2521287A1 CA 2521287 CA2521287 CA 2521287 CA 2521287 A CA2521287 A CA 2521287A CA 2521287 A1 CA2521287 A1 CA 2521287A1
- Authority
- CA
- Canada
- Prior art keywords
- inner tube
- drill string
- tube
- outer tube
- string assembly
- 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.)
- Granted
Links
Landscapes
- Earth Drilling (AREA)
Abstract
A coil tubing or jointed dual wall drill string assembly for subsurface drilling. The drill string assembly includes a metallic outer tube having an outer tube first end and an outer tube second end opposite the outer tube first end. The assembly also includes a flexible, substantially non- metallic inner tube that is substantially enclosed within and generally coaxially aligned with the outer tube. The flexible, substantially non- metallic inner tube has an inner tube first end, an inner tube second end opposite the inner tube first end, and an inner tube inner diameter. The inner tube and the outer tube define an annular channel therebetween. The drill string assembly also includes a means for conveying fluid through the annular channel toward the inner tube first end. The annular channel is adapted to convey drilling fluid under pressure toward the inner tube first end and the inner tube is adapted to convey cuttings toward the inner tube second end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/972,885 | 2004-10-25 | ||
| US10/972,885 US7152700B2 (en) | 2003-11-13 | 2004-10-25 | Dual wall drill string assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2521287A1 true CA2521287A1 (en) | 2006-04-25 |
| CA2521287C CA2521287C (en) | 2009-08-04 |
Family
ID=36242675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2521287 Expired - Fee Related CA2521287C (en) | 2004-10-25 | 2005-09-27 | Dual wall drill string assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2521287C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10246954B2 (en) | 2015-01-13 | 2019-04-02 | Saudi Arabian Oil Company | Drilling apparatus and methods for reducing circulation loss |
| US10260295B2 (en) | 2017-05-26 | 2019-04-16 | Saudi Arabian Oil Company | Mitigating drilling circulation loss |
| CN110656926A (en) * | 2019-11-14 | 2020-01-07 | 上海市城市建设设计研究总院（集团）有限公司 | Shallow harmful gas detection device based on drilling equipment and using method thereof |
| CN113863879A (en) * | 2020-06-30 | 2021-12-31 | 中国石油化工股份有限公司 | Gas reverse circulation is diverging device for well drilling |
-
2005
- 2005-09-27 CA CA 2521287 patent/CA2521287C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10246954B2 (en) | 2015-01-13 | 2019-04-02 | Saudi Arabian Oil Company | Drilling apparatus and methods for reducing circulation loss |
| US10260295B2 (en) | 2017-05-26 | 2019-04-16 | Saudi Arabian Oil Company | Mitigating drilling circulation loss |
| US11448021B2 (en) | 2017-05-26 | 2022-09-20 | Saudi Arabian Oil Company | Mitigating drilling circulation loss |
| CN110656926A (en) * | 2019-11-14 | 2020-01-07 | 上海市城市建设设计研究总院（集团）有限公司 | Shallow harmful gas detection device based on drilling equipment and using method thereof |
| CN110656926B (en) * | 2019-11-14 | 2024-02-09 | 上海市城市建设设计研究总院（集团）有限公司 | Application method of shallow harmful gas detection device based on drilling equipment |
| CN113863879A (en) * | 2020-06-30 | 2021-12-31 | 中国石油化工股份有限公司 | Gas reverse circulation is diverging device for well drilling |
| CN113863879B (en) * | 2020-06-30 | 2023-07-21 | 中国石油化工股份有限公司 | Gas reverse circulation well drilling is with diverging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2521287C (en) | 2009-08-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20190927 |