Abstract: Corrosion inhibiting compositions and methods for inhibiting the corrosion of metal surfaces by corrosive aqueous fluids are provided. In accordance with the invention, a corrosion inhibiting composition comprised of one or more aldehyde oligomers having the general formula are combined with the corrosive aqueous fluid.

Abstract: The present invention provides improved methods of stimulating fluid production from an unconsolidated formation penetrated by a well bore while reducing or preventing the migration of formation sands with fluids produced from the formation. The methods basically comprise the steps of placing an explosive in the well bore adjacent to the zone, creating at least one fracture extending from the well bore into the zone, depositing a hardenable resin composition coated proppant in the fracture with some of the resin composition coated proppant also being deposited in the well bore, causing the resin composition to harden and then detonating the explosive to thereby break up and cause the removal of at least a portion of the consolidated proppant in the well bore.

Abstract: A coiled tubing drilling hydraulic disconnect for use in disconnecting a tool from a length of tubing or other tool string. The apparatus has an upper housing and a lower housing with a splined ring threadingly engaged with the lower housing. A spline in the splined ring engages a spline on the upper housing so that torque may be transmitted therebetween. Lugs are disposed through windows in the lower housing below the splines, and a bushing is disposed between the splined ring and the lugs. Relative rotation between the upper and lower housings causes the splined ring to tighten against the bushing and lugs, thereby eliminating play therebetween. A lug prop disposed in the upper housing may be hydraulically actuated so that the lugs may move to a disconnect position, thereby releasing the upper housing from the lower housing. Because the windows are disposed below the splines, no torque or bending are applied to the windows, and the windows and lugs are shaped to minimize stress concentrations.

Abstract: Methods of stimulating and producing multiple stratified hydrocarbon reservoirs having numerous separate reservoir compartments are provided. The methods basically comprise the steps of drilling a first well bore into a lower part of the reservoir having a horizontal portion which intersects a previously drilled second well bore therein. At least one fracture is formed extending into two or more reservoir compartments from the horizontal portion of the third well bore for conducted hydrocarbons in the reservoir into the horizontal portion of the first well bore from where the hydrocarbons flow into the second well bore and are withdrawn.

Abstract: Improved methods of propping a fracture in a subterranean zone whereby the subsequent flow-back of the proppant is prevented are provided. The methods basically comprise the steps of placing proppant and a magnetized material in said fracture while maintaining the fracture open and then allowing the fracture to close on the proppant and magnetized material whereby the magnetized material clusters in voids and channels in the proppant bed formed.

Abstract: An apparatus for opening perforations in a casing string. The casing string has a special casing section defining a plurality of holes therethrough. Rupturable ceramic discs or inserts are disposed in said holes and retained therein. The ceramic discs or inserts are adapted to withstand the fluid differential pressures normally present in the wellbore but are rupturable in response to impact by a mild explosive charge. The explosive charge is provided by detonating a length of det-cord disposed in the casing string adjacent to the holes in the special casing section. A method of perforating using this apparatus is also disclosed.

Abstract: Methods of stimulating and producing multiple stratified hydrocarbon reservoirs having numerous separate reservoir compartments are provided. The methods basically comprise the steps of drilling a first well bore into a lower part of the reservoir having a horizontal portion which intersects a previously drilled second well bore therein. At least one fracture is formed extending into two or more reservoir compartments from the horizontal portion of the first well bore for conducted hydrocarbons in the reservoir into the horizontal portion of the first well bore from where the hydrocarbons flow into the second well bore and are withdrawn.

Abstract: The present invention provides improved methods of consolidating particulate material in a subterranean zone penetrated by a well bore. The methods basically comprise the steps of coating the particulate material with a hardenable resin composition and irradiating the hardenable resin composition coating on the particulate material with microwaves to thereby accelerate the hardening of the resin composition whereby the particulate material is rapidly consolidated into a stationary permeable mass.

Abstract: The present invention provides improved methods of drying pipelines containing water which are to transport hydrate forming gaseous fluids. The methods basically comprise flowing a liquid which forms an azeotrope mixture with water into contact with water in a pipeline, the amount of the azeotropic liquid being sufficient to form an azeotrope mixture with the water whereby as the mixture is evaporated in the pipeline, the water concentration in the remaining mixture does not reach that concentration which will form hydrates with the hydrate forming gaseous fluid.

Abstract: In accordance with the present invention, a collapsible cutter assembly is provided that utilizes opposing collapsible assemblies having explosive charges coupled thereto. The collapsible cutter has an linear actuator assembly with a running position and a deployed position. Secured to the actuator is a first plurality of remotely-detonatable charges that are pivotally coupled to the actuator such that the first plurality of remotely-detonatable charges are splayed outward and toward a median of the actuator as the actuator moves from the running position to the deployed position. Also secured to the actuator is a second plurality of remotely-detonatable charges that are pivotally coupled to an opposing end, the second plurality of remotely-detonatable charges are splayed outward and toward the median of the actuator as the actuator moves from the running position to the deployed position.

Abstract: The present invention provides a method for reducing the amount of water produced from a subterranean formation as a result of stimulation of the subterranean formation. The method comprises the introduction of a first and second reactive polymer which leak-off into the formation and which are capable of subsequently reacting together to form a reaction product which selectively reduces the permeability of the formation to water flow through the formation. The reactive polymers react in situ to form a reaction product that binds to the formation in such a manner that the flow of water is selectively retarded through the matrix while the flow of oil is substantially unaffected.

Abstract: The present invention provides an improved metal corrosion inhibitor for use in aqueous acid solutions which is relatively non-toxic and inexpensive. The corrosion inhibitor is a mixture comprised of oligomerized aromatic amines prepared by contacting the still bottoms residue produced in the distillation of quinoline from coal tar with oxygen in the presence of a catalyst.

Abstract: The present invention provides a method of treating a subterranean formation with a particulate laden fluid whereby particulate flowback is reduced or prevented. The method includes the steps of providing a fluid suspension including a mixture of a particulate, a tackifying compound and a multifunctional material, pumping the suspension into a subterranean formation and depositing the mixture within the formation whereby the tackifying compound retards movement of at least a portion of the particulate within the formation upon flow of fluids from the subterranean formation and said multifunctional material subsequently reacts with said tackifying compound to consolidate at least a portion of said particulate within said formation.

Abstract: The present invention provides improved methods of treating subterranean formations using borate cross-linking compositions and borate cross-linked well treating fluids. The borate cross-linking compositions are basically comprised of a low viscosity hydrocarbon liquid, an organophillic clay, a slightly water soluble borate, a buffer and a dispersing agent.

Abstract: The present invention relates to improved methods and compositions for consolidating unconsolidated subterranean zones. The compositions of the invention are low viscosity hardenable epoxy resin compositions which are basically comprised of an epoxy resin, a N-methyl-2-pyrrolidone diluent and an effective amount of a hardening agent.

Abstract: Improved methods of completing unconsolidated subterranean zones penetrated by wellbores are provided. The methods basically comprise the steps of placing a slotted liner in the zone, isolating the slotted liner and the wellbore in the zone, injecting a hardenable resin composition coated particulate material into the zone by way of the slotted liner and then causing the hardenable resin composition to harden whereby the particulate material is consolidated into a hard permeable uniform mass.

Abstract: Methods and compositions for preventing high density well completion fluid loss are provided. The methods basically comprise the steps of preparing a high density cross-linked aqueous gelled composition having the rigidity required to resist entry into a permeable subterranean formation penetrated by a well bore, placing the high density cross-linked aqueous gelled composition in the portion of the well bore within the permeable subterranean formation and placing a high density completion fluid in the well bore behind the high density cross-linked gelled composition.

Abstract: An aqueous foamed fracturing fluid composition and method for using the foamed fracturing fluid for fracturing subterranean formations that have been penetrated by a wellbore wherein the foamed fracturing fluid comprises: (a) a viscosifier which is preferably either hydrophobically modified guar or hydrophobically modified hydroxymethylcellulose; (b) a surfactant which is preferably alpha olefin sulfonate; and (c) the gas phase includes either nitrogen or carbon dioxide.

Abstract: The present invention provides corrosion inhibited organic acid compositions and methods of using the compositions. The compositions basically comprise water, an organic acid, a corrosion inhibitor comprising at least one quaternary ammonium compound and a corrosion inhibitor activator selected from the group consisting of thioglycolic acid, an alkali metal thiosulfate and mixtures thereof.

Abstract: The present invention provides methods of protecting ferrous metal well tubular goods and the like disposed in a well bore penetrating a subterranean formation from corrosion. The method basically includes the steps of introducing a liquid or solution of a tackifying compound having ferrous metal corrosion inhibition properties into the well bore whereby the tackifying compound is coated onto the tubular goods thereby providing extended corrosion protection to the tubular goods. Thereafter, formation fluids are produced from the subterranean formation.