Polymeric diverting agent

Patent · Tue May 04 04:00:00 EDT 1976

OSTI ID:6596322

Scheffel, J W; Fischer, P W

A water-insoluble particulate composition having controlled slow oil solubility at temperatures in excess of 350/sup 0/F is disclosed. The composition is comprised of solid particles of a homogeneous mixture of (1) polyethylene, ethylene-vinyl acetate copolymer containing about 15 to 30% by wt vinyl acetate, or admixtures of these polymers; (2) a polyamide having a melting point of between about 400/sup 0/ and 460/sup 0/F; and (3) a softening agent such as a long chain aliphatic diamide having a melting point between about 280/sup 0/ and 300/sup 0/F, or a polyterpene resin having a melting point of between 230/sup 0/ and 275/sup 0/F. Also disclosed is a method of using this particulate composition in well drilling and treating operations where formation temperatures of 350/sup 0/F or above are encountered. (6 claims)

• Assignee: Union Oil Co California
• Patent Number(s): US 3954629
• OSTI ID: 6596322
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
36 MATERIALS SCIENCE
360401* -- Polymers & Plastics-- Preparation & Fabrication-- (-1987)
CHEMICAL COMPOSITION
DRILLING
ENERGY SOURCES
FOSSIL FUELS
FUELS
PARTICLES
PARTICULATES
PETROLEUM
POLYMERS
RESERVOIR TEMPERATURE
SOLUBILITY
TEMPERATURE EFFECTS
USES
WELL DRILLING