Method and apparatus for drilling laterally from a well bore

Patent · Tue Dec 28 00:00:00 EST 1982

OSTI ID:6757539

Boyadjieff, G I; Campbell, A B

A hole is drilled laterally from a main well bore by lowering a drilling unit into the bore in a position of extension essentially longitudinally thereof, and then swinging the unit to a position of extension transversely of the well bore to drill the lateral hole. The drilling unit is desirably held by a carrier as the drilling unit and carrier are lowered into the well, and preferably is of a self-propelling character adapted to move entirely out of the carrier and grip the wall of the lateral hole in a manner transmitting the reactive forces of the drilling operation directly to the earth formation.

• Assignee: Varco International Inc
• Patent Number(s): US 4365676
• OSTI ID: 6757539
• Resource Relation: Patent File Date: Filed date 25 Aug 1980; Other Information: PAT-APPL-180695
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL GASIFICATION
WELL DRILLING
DRILLING EQUIPMENT
DIRECTIONAL DRILLING
INCLINATION
DRILLING
EQUIPMENT
GASIFICATION
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification