摘要:
Disclosed are novel aqueous drilling fluid compositions containing a lubrication additive and a method of drilling wells wherein the underground formation is contacted with such drilling fluid compositions. The lubrication additive is a polyolefin in aqueous solution having a molecular weight between about 500 and about 2100 with one or more substituent groups of succinic anhydride.
摘要:
A slurry excavating method for excavating the ground or drilling a hole using excavating slurry containing a powder of water absorbing resin. This method makes it easy to prevent the slurry from flowing into gaps in the ground or cracks in fractured shale layer or fissile layer while excavating the ground.
摘要:
Novel water-soluble terpolymers comprising:______________________________________ Ingredients Mole % ______________________________________ 2-acrylamido-2-methylpropane- 51-59 sulfonic acid, sodium salt (AMPS) N,N--dimethylacrylamide 6-28 acrylonitrile 20-35 ______________________________________ These terpolymers provide high temperature fluid loss additives and rheology stabilizers for high calcium-containing brine clay drilling fluids.
摘要:
A new copolymer of sodium styrene sulfonate-co-sodium-N-(4-sulfophenyl)-maleimidehas been found to be an improved viscosity control additive for water-based drilling muds.
摘要:
A water-based drilling fluid composition is described which comprises an aqueous dispersion of a clay material containing an effective dispersing amount of a modified lignosulfonate which is obtained by graft polymerization of from 5 to 30 weight percent of an acrylic compound with the lignosulfonate. The grafted lignosulfonate has an average molecular weight of less than 80,000.
摘要:
An improved drilling fluid and method for drilling a borehole, the drilling fluid comprising an aqueous dispersion of an emulsion polymerized latex comprised of an interpolymer of an olefinically unsaturated carboxylic acid monomer and at least one other, non-carboxylated polymerizable monomer, the latex being of a type which undergoes rapid increase in viscosity upon the addition of a sufficient amount of a basic material.
摘要:
Fluid loss control for aqueous chemical washes of the type used in well cementing is provided by incorporating in the wash, an effective amount of an oil-soluble resin mixture comprising a particulate friable resin and a particulate pliable resin.
摘要:
In one embodiment this invention provides a novel fluid composition which comprises an aqueous medium which is thickened with a synergistic viscosity mixture of hydroxypropylcellulose and poly(maleic anhydride/alkene-1).A present invention thickened aqueous medium is applicable as a vehicle for explosive slurries, printing pastes, paint formulations, and the like. A high viscosity aqueous medium of this invention is uniquely adapted for use as a hydraulic fluid in well-drilling operations and in secondary oil and gas recovery from subterranean formations.
摘要:
Drilling fluid compositions comprising an aqueous gel prepared from water and certain polymers such as polyacrylamides and related polymers, and methods of preparing said compositions.
摘要:
A PROCESS FOR THE CROSS-LINKING OF POLYMERS OF ACRYLAMIDE COMPRISING TREATING AN AQUEOUS SOLUTION OF SAID POLYMERS AT A TEMPERATURE OF FROM 0*C. TO 100*C. WITH AN AQUEOUS SOLUTION OF A SALT SELECTED FROM THE GROUP CONSISTING OF THE HYPOCHLORITE AND HYPOBROMITE SALTS OF ALKALI METALS AND ALKALINE-EARTH METALS.