DE203422C - - Google Patents
Info
- Publication number
- DE203422C DE203422C DENDAT203422D DE203422DA DE203422C DE 203422 C DE203422 C DE 203422C DE NDAT203422 D DENDAT203422 D DE NDAT203422D DE 203422D A DE203422D A DE 203422DA DE 203422 C DE203422 C DE 203422C
- Authority
- DE
- Germany
- Prior art keywords
- piston
- borehole
- tubular body
- stepped
- cylinder
- 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.)
- Active
Links
- 239000003245 coal Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/08—Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Press Drives And Press Lines (AREA)
- Actuator (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE203422C true DE203422C (es) |
Family
ID=465835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT203422D Active DE203422C (es) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE203422C (es) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3062286A (en) * | 1959-11-13 | 1962-11-06 | Gulf Research Development Co | Selective fracturing process |
| US3062294A (en) * | 1959-11-13 | 1962-11-06 | Gulf Research Development Co | Apparatus for fracturing a formation |
-
0
- DE DENDAT203422D patent/DE203422C/de active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3062286A (en) * | 1959-11-13 | 1962-11-06 | Gulf Research Development Co | Selective fracturing process |
| US3062294A (en) * | 1959-11-13 | 1962-11-06 | Gulf Research Development Co | Apparatus for fracturing a formation |
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