摘要:
According to an embodiment, a composition is provided that can be used in a cementing. The composition includes at least: (i) a hydraulic cement; and (ii) a copolymer comprising at least the monomeric units (a) through (d) of the following formula: wherein the monomeric units (a) through (d) can be any sequence and any proportion in the copolymer. With water, the composition of the hydraulic cement and such a copolymer becomes a cement composition. According to the method, the cement composition is introduced into a well and allowed to set in the well.
摘要:
Cement compositions may comprise an aluminosilicate; a sodium aluminate, a calcium aluminate, a potassium aluminate, or a combination thereof; and water. In some cases, the cement does not include Portland cement. The cement may be used in a subterranean formation having corrosive components therein, wherein the set cement sheath is resistant to degradation from the corrosive components within the subterranean formation.
摘要:
The present invention relates to cement compositions and their use in cementing operations. The cements comprise an aluminosilicate; a sodium aluminate, a calcium aluminate, a potassium aluminate, or a combination thereof; and water. In some cases the cement does not include Portland cement. The cement may be used in a subterranean formation having corrosive components therein, wherein the set cement sheath is resistant to degradation from the corrosive components within the subterranean formation.
摘要:
According to an embodiment, a composition that can be used in cementing. The composition includes at least: (i) a hydraulic cement; (ii) a copolymer comprising at least the monomeric units (a) through (d) of the following formula: wherein the monomeric units (a) through (d) can be any sequence and any proportion in the copolymer. With water, the composition of the hydraulic cement and such a copolymer becomes a cement composition. According to the method, the cement composition is introduced into a well and allowed to set in the well.
摘要:
A method of servicing a wellbore in a subterranean formation comprising preparing a wellbore servicing fluid comprising cement, an aqueous fluid, and a cyclodextrin, a cyclodextrin derivative, or combination thereof; placing the wellbore servicing fluid in the wellbore and allowing the fluid to set. A wellbore servicing fluid comprising cement, aqueous fluid, and a cyclodextrin, cyclodextrin derivative, or combination thereof.
摘要:
Graft copolymer (P) which exhibit pH dependent swelling/dissolution properties comprising a hydrophobic back-bone and graft chains comprising acidic monomer. This Graft copolymer (P) do not swell or dissolve at acidic pH prevalent in the stomach and they swell/dissolve at near neutral pH prevalent in the intestinal region. The graft copolymer (P) is useful for the development of drug delivery formulations particularly for oral drug delivery formulations.
摘要:
The present invention relates to encapsulated breakers and the use of encapsulated breakers for breaking viscosified treatment fluids. One embodiment of the present invention provides a method of providing a viscosified treatment fluid having a first viscosity having a gelling agent, a crosslinking agent, a proppant, an aqueous-base fluid, and an encapsulated breaker composition having an encapsulant that has a poly(meth)acrylate blend; introducing the viscosified treatment fluid in the subterranean formation; creating or enhancing a fracture in a subterranean formation; and allowing the encapsulated breaker composition to release the breaker so as to reduce the viscosity of the viscosified treatment fluid to a second viscosity.
摘要:
A gastroretentive, extended release composition which floats and swells at acidic pH prevalent in the stomach. The composition includes a pH dependent graft copolymer, a gellable polymer, a therapeutic agent, a gas generating system and pharmaceutically acceptable ingredients. The disclosed composition is useful to deliver the therapeutic agent within the stomach for an extended period of time.
摘要:
The present invention relates to environmentally friendly compositions and methods for removing or suppressing metal ions in waters, flowback waters, and produced waters to make such waters suitable for subsequent use in oil-field applications and for delinking metal cross-linked gelling agents. One embodiment of the present invention provides a method of providing a competitive binder and allowing the competitive binder to interact with interfering metal ions in a flowback fluid to suppress or remove interfering metal ions.
摘要:
The present invention relates to encapsulated breakers and the use of encapsulated breakers for breaking viscosified treatment fluids. One embodiment of the present invention provides a method of providing a viscosified treatment fluid having a first viscosity having a gelling agent, a crosslinking agent, a proppant, an aqueous-base fluid, and an encapsulated breaker composition having an encapsulant that has a poly(meth)acrylate blend; introducing the viscosified treatment fluid in the subterranean formation; creating or enhancing a fracture in a subterranean formation; and allowing the encapsulated breaker composition to release the breaker so as to reduce the viscosity of the viscosified treatment fluid to a second viscosity.