FR1236838A - Drilling device - Google Patents

Drilling device

Info

Publication number
FR1236838A
FR1236838A FR806242A FR806242A FR1236838A FR 1236838 A FR1236838 A FR 1236838A FR 806242 A FR806242 A FR 806242A FR 806242 A FR806242 A FR 806242A FR 1236838 A FR1236838 A FR 1236838A
Authority
FR
France
Prior art keywords
drilling device
drilling
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
FR806242A
Other languages
French (fr)
Inventor
Italo Costa
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 filed Critical
Application granted granted Critical
Publication of FR1236838A publication Critical patent/FR1236838A/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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • 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
    • 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
    • E21B17/042—Threaded
FR806242A 1958-09-18 1959-09-18 Drilling device Expired FR1236838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1236838X 1958-09-18

Publications (1)

Publication Number Publication Date
FR1236838A true FR1236838A (en) 1960-07-22

Family

ID=11433979

Family Applications (1)

Application Number Title Priority Date Filing Date
FR806242A Expired FR1236838A (en) 1958-09-18 1959-09-18 Drilling device

Country Status (1)

Country Link
FR (1) FR1236838A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452583A1 (en) * 1979-03-30 1980-10-24 Foraco Forage Rationnel Const Drilling system incorporating inverse mud circulation - comprises raising debris-laden mud to surface by depression created in upper part of train of rods by air injection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452583A1 (en) * 1979-03-30 1980-10-24 Foraco Forage Rationnel Const Drilling system incorporating inverse mud circulation - comprises raising debris-laden mud to surface by depression created in upper part of train of rods by air injection

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