FR2234598B3 - - Google Patents

Info

Publication number
FR2234598B3
FR2234598B3 FR7421514A FR7421514A FR2234598B3 FR 2234598 B3 FR2234598 B3 FR 2234598B3 FR 7421514 A FR7421514 A FR 7421514A FR 7421514 A FR7421514 A FR 7421514A FR 2234598 B3 FR2234598 B3 FR 2234598B3
Authority
FR
France
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
FR7421514A
Other versions
FR2234598A1 (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.)
DAHL KRISTEN
Original Assignee
DAHL KRISTEN
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 DAHL KRISTEN filed Critical DAHL KRISTEN
Publication of FR2234598A1 publication Critical patent/FR2234598A1/fr
Application granted granted Critical
Publication of FR2234598B3 publication Critical patent/FR2234598B3/fr
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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • E21B7/025—Rock drills, i.e. jumbo drills
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • E21B7/022—Control of the drilling operation; Hydraulic or pneumatic means for activation or operation
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/20—Control of position or direction using feedback using a digital comparing device
FR7421514A 1973-06-21 1974-06-20 Expired FR2234598B3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO2579/73A NO257973L (fr) 1973-06-21 1973-06-21

Publications (2)

Publication Number Publication Date
FR2234598A1 FR2234598A1 (fr) 1975-01-17
FR2234598B3 true FR2234598B3 (fr) 1977-04-22

Family

ID=19878943

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7421514A Expired FR2234598B3 (fr) 1973-06-21 1974-06-20

Country Status (3)

Country Link
FR (1) FR2234598B3 (fr)
NO (1) NO257973L (fr)
SE (1) SE7408099L (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO151381C (no) * 1977-06-21 1985-03-27 Atlas Copco Ab Anordning for parallellfoering av maskinenheter.

Also Published As

Publication number Publication date
FR2234598A1 (fr) 1975-01-17
NO257973L (fr) 1975-01-20
SE7408099L (fr) 1974-12-23

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