摘要:
An aqueous solution of a terpolymer, useful as fluid loss agent for drilling muds and not for cement slurries, is treated with acid and heat. An excellent fluid loss agent for cement is obtained. Very efficient liquid additive, for all purposes, which does not modify either the rheology, nor substantially the setting time.
摘要:
The invention relates to cement compositions for cementing wells, which allow pressure gas-channeling to be effectively controlled up to more than about 485.degree. F. The cement composition contains a styrene-butadiene latex and a stabilizer. The film of latex interrupts gas-channeling after an extremely brief path.
摘要:
The invention relates to a quick-release coupling, more particularly intended for hose pipe assemblies used at sea.Said coupling is composed of two jaws which cooperate with truncated parts of the coupling members and are held together or released by the movement of a finger sliding inside bores provided in said jaws.The coupling according to the invention offers improved efficiency and reliability.
摘要:
The invention relates to a method for obtaining gelled hydrocarbon compositions, and their application in the hydraulic fracturing of rocks.The gelling method according to the invention uses as an activator a partially neutralized aluminum acid salt.
摘要:
The invention relates to an additive adapted to suppress free water in conditions of "over-dispersion" of the cement when cementing an oil well. This additive is selected from cerain metal soluble salts such as Mg, Ni, etc. This additive modifies neither the other properties of the slurry (in particular setting time) nor the action of other additives (in particular of retarders).