CA2169544A1 - Equipment to reduce torque on a drill string - Google Patents
Equipment to reduce torque on a drill stringInfo
- Publication number
- CA2169544A1 CA2169544A1 CA002169544A CA2169544A CA2169544A1 CA 2169544 A1 CA2169544 A1 CA 2169544A1 CA 002169544 A CA002169544 A CA 002169544A CA 2169544 A CA2169544 A CA 2169544A CA 2169544 A1 CA2169544 A1 CA 2169544A1
- Authority
- CA
- Canada
- Prior art keywords
- drill string
- sleeve
- mandrel
- drill
- equipment
- 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
Abstract
A drill string torque-reducing sub-assembly is disclosed comprising: a hollow longitudinally-extending mandrel (1) capable of being coupled between adjacent first and second drill pipes in the drill string; and a sleeve (2) capable of freely rotating about the mandrel (1), the sleeve having an external diameter (18) intended to be larger than that of any connection component of the first or second drill pipe, and the sleeve (2) being prevented by means (16) mounted internally of the sleeve from longitudinal displacement relative to the mandrel (1). The sub-assembly can induce torque in a drill string, by reducing frictional losses between the wellbore and the rotating components in the drill string.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9317128.8 | 1993-08-17 | ||
GB939317128A GB9317128D0 (en) | 1993-08-17 | 1993-08-17 | Equipment to reduce torque on a drill string |
PCT/GB1994/001778 WO1995005521A1 (en) | 1993-08-17 | 1994-08-15 | Equipment to reduce torque on a drill string |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2169544A1 true CA2169544A1 (en) | 1995-02-23 |
CA2169544C CA2169544C (en) | 2005-11-01 |
Family
ID=35429190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002169544A Expired - Lifetime CA2169544C (en) | 1993-08-17 | 1994-08-15 | Equipment to reduce torque on a drill string |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2169544C (en) |
-
1994
- 1994-08-15 CA CA002169544A patent/CA2169544C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2169544C (en) | 2005-11-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20140815 |