Side-entry sub well logging apparatus and method

Patent · Tue Dec 13 04:00:00 EST 1988

OSTI ID:6484316

Rankin, E E

This patent describes a well logging system in which conductor cable extends outside of a drill string assembled of drill pipe and a side entry sub, the cable entering into a sidewall passage of the side entry sub and extending through the drill pipe to a logging instrument located at the lower end of the drill string, an apparatus for releasing the side entry sub from the drill string in the event the drill string becomes stuck, the apparatus comprising: (a) a release sub having a telescoping joinder means for connection to the drill string below the side entry sub; (b) means for releasably latching the side entry sub to the release sub serially with the drill string, the means releasing the side entry sub from the release sub to enable the side entry sub to be pulled upwardly from the drill string; (c) the release sub has a lower end threaded to connect to the drill string and an upper end shaped to axially internally receive an elongate mandrel; (d) an internal groove within the release sub; (e) the latch means comprising mandrel supported locking members inserted into the internal groove; and (f) the latch means further comprising means for shifting the mandrel to alter locking of the locking members.

• Assignee: Halliburton Co., Duncan, OK
• Patent Number(s): US 4790377
• OSTI ID: 6484316
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
CABLES
CONDUCTOR DEVICES
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
ELECTRIC CABLES
ELECTRIC LOGGING
ELECTRICAL EQUIPMENT
EQUIPMENT
EXPLORATION
FASTENERS
GEOLOGIC DEPOSITS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
OPERATION
PETROLEUM DEPOSITS
PIPES
RESOURCES
TELESCOPES
WELL LOGGING
WELL LOGGING EQUIPMENT