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
Application number
DENDAT203422D
Other languages
German (de)
English (en)
Publication of DE203422C publication Critical patent/DE203422C/de
Active legal-status Critical Current

Links

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)
  • Actuator (AREA)
  • Press Drives And Press Lines (AREA)
DENDAT203422D Active DE203422C (en:Method)

Publications (1)

Publication Number Publication Date
DE203422C true DE203422C (en:Method)

Family

ID=465835

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT203422D Active DE203422C (en:Method)

Country Status (1)

Country Link
DE (1) DE203422C (en:Method)

Cited By (2)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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