Articulated elevator links for top drive drill rig

Patent · Tue Dec 27 00:00:00 EST 1988

OSTI ID:6382903

Krasnov, I

This patent describes for a drill rig having a derrick, a drive head assembly suspended in the derrick having a drive stem for connection to and for rotating a string of drill pipe, an improved means for connecting a stand of the drill pipe to the drive stem, comprising in combination: a pair of upper link sections, each pivotally suspended from the drive head assembly and having a lower end; a pair of lower link sections, each having an upper end pivotally connected to one of the lower ends of the upper link sections and each having a lower end; a set of elevators mounted to lower ends of the lower link sections for clamping about the stand of drill pipe; upper lifting means connected between the upper link sections and the drive head assembly for pivoting the upper link sections relative to the drive head assembly; and lowering lifting means connected between the upper and lower link sections for pivoting the lower link sections relative to the upper link sections for lifting the elevators upward relative to the drive head assembly to engage the stand of drill pipe with the drive stem. The patent also describes a method for connecting a stand of the drill pipe to the drive stem.

• Assignee: Hughes Tool Co., USA, Houston, TX
• Patent Number(s): US 4793422
• OSTI ID: 6382903
• Resource Relation: Patent File Date: Filed date 16 Mar 1988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DRILL PIPES
MATERIALS HANDLING
DRILLING RIGS
MATERIALS HANDLING EQUIPMENT
DESIGN
FASTENERS
JOINING
NATURAL GAS WELLS
OIL WELLS
SUPPORTS
DRILLING EQUIPMENT
EQUIPMENT
FABRICATION
MECHANICAL STRUCTURES
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing