Use of mono and polyalkylene glycol ethers as agents for the release of differentially stuck drill pipe

Patent · Tue Sep 30 00:00:00 EDT 1986

OSTI ID:5061566

Keener, I G; Newlove, J C; Portnoy, R C; Fehler, D F; Pober, K W

An improved method is described of releasing a stuck drill string in the borehole of an underground formation during drilling operations employing a drilling fluid. The method comprises contacting the borehole zone contiguous with the stuck drill string with a spotting pill effective to reduce the annular pressure exerted by the drilling fluid against the stuck drill string and to release the stuck drill string. The spotting pill is comprised of an alkylene glycol ether of the class consisting of alkylene glycol ether, poly(alkylene glycol) ether and mixtures thereof.

• Assignee: Exxon Chemical Patents, Inc., Florham Park, NJ
• Patent Number(s): US 4614235
• OSTI ID: 5061566
• Resource Relation: Patent File Date: Filed date 15 Apr 1985
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DRILL PIPES
FAILURES
PRESSURE CONTROL
NATURAL GAS WELLS
OIL WELLS
DRILLING FLUIDS
ETHERS
GLYCOLS
MIXTURES
ALCOHOLS
CONTROL
DISPERSIONS
DRILLING EQUIPMENT
EQUIPMENT
FLUIDS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing