BE488253A - - Google Patents
Info
- Publication number
- BE488253A BE488253A BE488253DA BE488253A BE 488253 A BE488253 A BE 488253A BE 488253D A BE488253D A BE 488253DA BE 488253 A BE488253 A BE 488253A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/081—Screw-and-nut feed mechanisms
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR808943X | 1949-01-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE488253A true BE488253A (xx) |
Family
ID=9253260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE488253D BE488253A (xx) | 1949-01-04 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE488253A (xx) |
| DE (1) | DE808943C (xx) |
| FR (1) | FR981626A (xx) |
| LU (1) | LU29477A1 (xx) |
-
0
- BE BE488253D patent/BE488253A/xx unknown
- LU LU29477D patent/LU29477A1/xx unknown
-
1949
- 1949-01-04 FR FR981626D patent/FR981626A/fr not_active Expired
-
1950
- 1950-01-03 DE DEC377A patent/DE808943C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR981626A (fr) | 1951-05-29 |
| LU29477A1 (xx) | |
| DE808943C (de) | 1951-07-23 |