Releasable drill string device and method

Patent · Tue Mar 13 04:00:00 EST 1984

OSTI ID:6489973

Carstensen, K J

A drill string working tool is provided that may be releasably engaged to and removed from a drill string member. The tool, such as a cylindrical stabilizer body, is positioned around a cylindrical drill string member, the inner diameter of the stabilizer body being greater than the outer diameter of the drill string member, so as to provide an annular cavity between the stabilizer body and the drill string member. A heating element disposed within a protective outer sheath is mounted axially along the inner surface of the stabilizer body. For installation, a low melting point solid material such as zinc or a zinc alloy is poured in to substantially fill the annular cavity. The stabilizer compression preloads the zinc onto the drill string member, and thus the stabilizer body is non-rotatably attached to the drill string member. For removal, the low melting point fill material is removed from the annular cavity by remelting with the interior heating element and pouring out the fill material. The stabilizer body can then be released and slipped off the drill string member.

• Assignee: EDB-84-168819
• Patent Number(s): US 4436158
• OSTI ID: 6489973
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CONFIGURATION
CYLINDRICAL CONFIGURATION
DESIGN
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
HEATERS
MELTING POINTS
METALS
PHYSICAL PROPERTIES
PIPES
POSITIONING
ROTARY DRILLING
STABILIZATION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ZINC