Method for protecting a pipe casing from a drill pipe string

Patent · Tue May 23 00:00:00 EDT 1989

OSTI ID:5717095

Walker, J H

This patent describes a method for protecting a drill pipe casing from damage by a rotatable string of drill pipe longitudinally extended therethrough, the drill pipe string including drill pipe sections, each drill pipe section having an internally threaded top end and having an externally threaded bottom end, the top end of a first the drill pipe section being threadably engaged with the bottom end of a second adjacent drill pipe section, the upper outside end and the lower outside end of each drill pipe section being beveled whereby an angular external groove is formed between longitudinally adjacent the first and second pipe sections when the drill pipe sections are threadably engaged.

• Assignee: Phillips Petroleum Co., Bartlesville, OK
• Patent Number(s): US 4832137
• OSTI ID: 5717095
• Resource Relation: Patent File Date: Filed date 28 Aug 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
WELL CASINGS
POSITIONING
DAMAGE
DRILL PIPES
NATURAL GAS WELLS
OIL WELLS
ROTATION
SAFETY
THREADED JOINTS
DRILLING EQUIPMENT
EQUIPMENT
JOINTS
MOTION
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing