FR1175477A - Perforation improvements - Google Patents

Perforation improvements

Info

Publication number
FR1175477A
FR1175477A FR1175477DA FR1175477A FR 1175477 A FR1175477 A FR 1175477A FR 1175477D A FR1175477D A FR 1175477DA FR 1175477 A FR1175477 A FR 1175477A
Authority
FR
France
Prior art keywords
perforation
perforation improvements
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.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Atlas Copco AB filed Critical Atlas Copco AB
Application granted granted Critical
Publication of FR1175477A publication Critical patent/FR1175477A/en
Expired legal-status Critical Current

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
    • E21B19/086—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 with a fluid-actuated cylinder
FR1175477D 1956-05-15 1957-05-06 Perforation improvements Expired FR1175477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1175477XA 1956-05-15 1956-05-15

Publications (1)

Publication Number Publication Date
FR1175477A true FR1175477A (en) 1959-03-26

Family

ID=22373515

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1175477D Expired FR1175477A (en) 1956-05-15 1957-05-06 Perforation improvements

Country Status (1)

Country Link
FR (1) FR1175477A (en)

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