Subterranean fluids comprising a hydraulic cement in an invert emulsion, and methods of using such fluids in subterranean well cementing operations, are provided. The fluids comprise a hydraulic cement and an invert emulsion of oil, water, and a surfactant. Optionally, other ingredients may be included in the fluids.

The improved recovery of hydrocarbons from subterranean formations by fracturing and matrix acidizing a subterranean formation is accomplished. Well treatment fluids having a viscoelastic surfactant fluid containing worm like micelles are useful to improve recovery of hydrocarbons and limit the loss of fracturing fluid into the formation fracture face. The viscolastic surfactant-based fracturing fluids of the present Invention are stable across a wide pH spectrum, allowing them to be used for fr...

A modular fluid storage tank, intended for underground storage of water, utilizing alternating circular and octagonal ribs in the main body and curved, ribbed, end caps. Interconnection of the tanks uses rigid pipe or semi-flexible hose. The coupling between the pipe and the tank incorporates a fitting, integrally molded into the tank, which extends into the interior of the tank, and a flexible sleeve which fits over, and is clamped to, the fitting and the pipe. The coupling is protected from th...

The present invention provides improved compositions and methods of using the compositions for sealing subterranean zones. The compositions are basically comprised of water, an aqueous rubber latex, an organophillic clay, sodium carbonate, an epoxy resin and a hardening agent for said epoxy resin.

A method for strengthening a subterranean formation by injecting an aqueous gellable composition containing a cross-linkable polymer into the subterranean formation through a wellbore to increase the strength of the subterranean formation while retaining the ability of the subterranean formation to produce fluids.

A drainage assembly is disclosed for draining water from the vicinity of a subterranean construction surface, such as a subgrade foundation wall. The assembly comprises a hollow drainage panel formed by a sheet-like base and a filter media, the filter media being spaced apart from the base by a plurality of members that project from the inner surface of the base. The base has at least one hinge, and preferably two closely spaced parallel hinges, extending along its entire length between adjacent...

A well treatment fluid such as a fracturing fluid or drilling fluid which comprises a water-in-oil emulsion containing an amine or amine oxide surfactant of the following formula: ##STR1## or a protonated form thereof ##STR2## wherein R.sup.3 is a hydrocarbyl or substituted hydrocarbyl having from about 8 to about 30 carbon atoms, and R.sup.1 and R.sup.2 are independently hydrogen, a hydrocarbyl or substituted hydrocarbyl having up to 30 carbon atoms.

Improved methods of cementing in a subterranean zone penetrated by a well bore are provided. The methods are basically comprised of the steps of preparing a foamed cement composition comprised of hydraulic cement, a non-dispersing set retarder, sufficient water to form a slurry, sufficient gas to foam the slurry and a foaming and foam stabilizing surfactant mixture present in an amount sufficient to facilitate the formation of the foam and stabilize the foamed cement composition.

The present invention provides improved methods of sealing a subterranean zone to remedy the uncontrolled flow of fluids into and out of the zone. The methods basically comprise preparing a sealing composition and placing the composition into the zone to be sealed. The placement of the composition is controlled in a manner whereby portions of the sealing composition are continuously converted to sealing masses which are successively diverted into permeable portions of the zone until all of the p...

A method of fracturing a subterranean formation which surrounds a well bore comprises the steps of providing a fracturing fluid, and injecting the fracturing fluid into the well bore at a pressure sufficient to form fractures in the subterranean formation which surrounds the well bore. The pressure is then released from the fracturing fluid, after which the fluid may be removed from the well and the well placed into production. The fracturing fluid comprises an aqueous liquid, a polysaccharide s...