Tool joint design and operating torque

Conference ·

OSTI ID:5482950

Farr, Jr, A P; Smith, T B

Excess torque is involved in most premature failures of tool joints. This paper includes a discussion of the theoretical torsional strength of the drill pipe to which they may be attached. A review of five years of torsional failures in tool joints is presented and consideration is given to the effect of certain operating practices. Current tool joint bore and OD dimensions are reviewed in the light of field failures. It also covers a need to limit the input torque while drilling and suggests periodic checks to see if torsional limits have been exceeded.

• Research Organization: Hughes Tool Co., Culver City, CA (USA). Aircraft Div.
• OSTI ID: 5482950
• Report Number(s): HTC-2M7-77; CONF-7603133-1; ON: DE84900213
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CARBON
COPPER
DRILL PIPES
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
FAILURES
GRAPHITE
JOINTS
LEAD
METALS
MINERALS
NONMETALS
PIPE JOINTS
PIPES
TESTING
THREADED JOINTS
TORQUE
TRANSITION ELEMENTS
ZINC