Downhole drilling spotting fluid composition and method

Patent · Tue Mar 26 04:00:00 EST 1991

OSTI ID:5367215

Hayes, J R; Campbell, G J

This paper discusses a spotting fluid concentrate composition suitable for use in downhole drilling operations in a pill for releasing periodically stuck drill string. It comprises glycerophosphoric acid ester; a polyacyloxy polycarboxylic acid ester of monoglycerides, diglycerides and mixtures thereof; an optional viscosifying agent for increasing the viscosity of the dispersion; and an optional sealing agent for preventing diffusion of water into the downhole formation. This patent also describes a method for lubricating a downhole well drilling operation. It comprises mixing a spotting fluid concentrate composition comprising glycerophosphoric acid ester, a polyacyloxy polycarboxylic acid ester of monoglycerides, diglycerides and mixtures thereof, an optional viscosifying agent and an optional sealing agent with drilling mud; and circulating the mud mixture through the well.

• Assignee: Turbo-Chem International, Inc., Lafayette, LA (USA)
• Patent Number(s): US 5002672; A
• Application Number: PPN: US 7-532261
• OSTI ID: 5367215
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CHEMICAL COMPOSITION
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
ESTERS
FAILURES
FLUIDS
LUBRICANTS
LUBRICATION
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
WELL DRILLING
WORKING FLUIDS