DE8902528U1 - - Google Patents
Info
- Publication number
- DE8902528U1 DE8902528U1 DE8902528U DE8902528U DE8902528U1 DE 8902528 U1 DE8902528 U1 DE 8902528U1 DE 8902528 U DE8902528 U DE 8902528U DE 8902528 U DE8902528 U DE 8902528U DE 8902528 U1 DE8902528 U1 DE 8902528U1
- Authority
- DE
- Germany
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8902528U DE8902528U1 (en) | 1989-03-03 | 1989-03-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8902528U DE8902528U1 (en) | 1989-03-03 | 1989-03-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8902528U1 true DE8902528U1 (en) | 1989-04-20 |
Family
ID=6836619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8902528U Expired DE8902528U1 (en) | 1989-03-03 | 1989-03-03 |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8902528U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0461311A2 (en) * | 1990-06-12 | 1991-12-18 | Hitachi Construction Machinery Co., Ltd. | Cylindrical telescopic kelly-bar apparatus |
-
1989
- 1989-03-03 DE DE8902528U patent/DE8902528U1/de not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0461311A2 (en) * | 1990-06-12 | 1991-12-18 | Hitachi Construction Machinery Co., Ltd. | Cylindrical telescopic kelly-bar apparatus |
| EP0461311A3 (en) * | 1990-06-12 | 1992-07-08 | Hitachi Construction Machinery Co., Ltd. | Cylindrical telescopic kelly-bar apparatus |
| US5263899A (en) * | 1990-06-12 | 1993-11-23 | Hitachi Construction Machinery Co., Ltd. | Cylindrical telescopic kelly-bar apparatus |
| EP0798444A1 (en) * | 1990-06-12 | 1997-10-01 | Hitachi Construction Machinery Co., Ltd. | Cylindrical telescopic kelly-bar apparatus |