Aqueous chemical wash compositions

Patent · Tue Jul 21 00:00:00 EDT 1987

OSTI ID:6218885

Bannister, C E

This patent describes an aqueous, substantially unfoamed chemical wash composition having properties making it suitable for use as a pre-flush in well cementing operations and/or for removal of drilling mud from a borehole at a temperature of from about 150/sup 0/F to about 270/sup 0/F, the wash a. being predominantly composed of water, b. containing an active surfactant component comprising a combination of (1) from about 0.1 to about 1.5 weight percent (total weight basis) of a water soluble anionic surfactant; (2) from about 0.1 to about 1.5 weight percent (total weight basis) of a nonionic surfactant; and (3) from about 0.05 to about 0.54 weight percent (total weight basis) of at least one water soluble amphoteric surfactant, and c. having dispersed therein a heterogeneous mixture of distinct particles comprising both a first particulate oil soluble resin which is friable and a second particulate oil soluble resin which is pliable and where the size of the friable resin particles ranges from about 0.5 to about 300 microns and the size of the pliable resin particles ranges from about 0.05 to about 30 microns. The amount of the friable-pliable resin mixture is sufficient to impart effective fluid loss control to the chemical wash composition.

• Assignee: Dowell Schlumberger Inc., Tulsa, OK
• Patent Number(s): US 4681165
• OSTI ID: 6218885
• Resource Relation: Patent File Date: Filed date 1 Mar 1984
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
NATURAL GAS WELLS
WASHING
OIL WELLS
AQUEOUS SOLUTIONS
CEMENTING
CHEMICAL COMPOSITION
DRILLING FLUIDS
HIGH TEMPERATURE
MEDIUM TEMPERATURE
MIXTURES
QUANTITY RATIO
RESINS
SURFACTANTS
WATER
CLEANING
DISPERSIONS
FLUIDS
HYDROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
SOLUTIONS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing