Positioning of well pipe jack in a rig

Patent · Tue Mar 20 04:00:00 EST 1984

OSTI ID:6768545

Boyadjieff, G J; Campbell, A B

A jacking mechanism for lowering a string of casing or other well pipe into a well includes two structures which extend generally vertically beneath the floor of a drilling rig and which have portions functioning as power operated actuating units for moving one of two pipe supporting units upwardly and downwardly relative to the other, with the two specified generally vertical structures being offset circularly about the well axis from the location of a tubular mousehole element, and with one or more blowout preventers beneath the rig floor having a portion projecting outwardly away from the well axis at a location circularly between one of the generally vertical structures of the jacking mechanism and the mousehole.

• Assignee: Varco Intl., Inc.
• Patent Number(s): US 4437515
• OSTI ID: 6768545
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONTROL EQUIPMENT
DESIGN
DRILLING RIGS
EMPLACEMENT
EQUIPMENT
HYDRAULIC CONTROL DEVICES
MATERIALS HANDLING EQUIPMENT
NATURAL GAS WELLS
OIL WELLS
PIPES
POSITIONING
WELL CASINGS
WELLS