Well bore servicing arrangement

Patent · Tue Feb 02 04:00:00 EST 1988

OSTI ID:5288030

Arnold, R D

An assembly for connecting between the hollow, rotatable stem extending through a top drive power unit and a well string wherein drilling fluids are supplied to the stem for passage through the top drive power unit to the well string therebelow, the well string being rotatable and movable longitudinally in a well bore while supplying a pumpable substance to the hollow stem and well string without first conducting the substance through the top drive power unit, is described comprising: an outer tubular member; a rotatable inner tubular member with a longitudinal passage therethrough; the rotatable inner tubular member and longitudinal passage therethrough extending through the outer tubular member; the rotatable inner tubular member having connection means connectable with the hollow stem for communicating the longitudinal passage in the inner tubular member with the hollow stem beneath the top drive power unit and with the well string; the outer tubular member having lateral flow passage means to communicate with the longitudinal passage extending through the inner tubular member; the rotatable inner tubular member having a circumferential groove on its outer surface intersecting the lateral flow passage means and the outer tubular member having a mating circumferential groove formed on its inner surface which groove means cooperate to form a continuous fluid flow passage in each of the inner and outer tubular members communicating with the lateral passage means.

• Assignee: Texas Iron Works, Inc., Houston, TX
• Patent Number(s): US 4722389
• OSTI ID: 5288030
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUID FLOW
FLUID MECHANICS
FLUIDS
HYDRAULICS
MECHANICS
NATURAL GAS WELLS
OIL WELLS
PIPES
TOOLS
WELL SERVICING
WELLS