摘要:
A process for imparting lubricity to an aqueous drilling fluid used in geological exploration involving: (a) providing an aqueous drilling fluid; (b) providing a lubricant component containing a partial glyceride of predominantly unsaturated fatty acids having from about 16 to 24 carbon atoms; and (c) introducing the partial glyceride into the aqueous drilling fluid.
摘要:
Disclosed are drilling fluids suitable for use in connection with oil well drilling. The drilling fluids of the invention include in one embodiment a liquid base, an alkyl glucoside, such as methyl glucoside, and a borehole stability agent that includes a maltodextrin, a carboxyalkyl starch, a hemicellulose-containing material, or a mixture of the foregoing. In another embodiment, the drilling fluid includes a liquid base and desugared molasses solids, preferably in combination with an alkyl glucoside and more preferably in further combination with one of the aforementioned borehole stability agents. The drilling fluids of the invention surprisingly have a reduced tendency to swell shale as compared with known drilling fluids. Also disclosed are a drilling apparatus and process. The drilling apparatus includes a drill string, which may be conventional, that is fluidically coupled to a source of drilling fluid, the source of drilling fluid including the drilling fluid of the invention. The process of the invention includes the step of circulating the drilling fluid of the invention through a drill string during borehole drilling.
摘要:
The present invention provides improved reactive cement compositions for sealing hydrocarbon containing subterranean zones and methods of using the cement compositions. The sealing compositions are basically comprised of water, a hydraulic cement, an organophillic clay, a hydratable gelling agent and a water soluble alkaline source in effective amounts.
摘要:
The Invention relates to fluids and techniques to optimize/enhance the production of hydrocarbon from subterranean formations (e.g., “completion fluids”), in particular, fluids and techniques are. disclosed and claimed which remove wellbore damage and near-wellbore damage in the form of coating formed from drilling and production-related operations (“filtercake”); the techniques can be applied either by themselves or in conjunction with other completion operations, such as gravel packing; preferred embodiments are chelating agent and enzyme systems in a viscoelastic surfactant (VES) matrix.
摘要:
Disclosed is a method for producing a predetermined cesium compound. The method comprises treating a cesium-containing material with a suitable reagent to dissolve at least a portion of the cesium contained in the material and form a slurry; adding a base comprising slaked lime or calcium carbonate and an acid containing the anion of the predetermined cesium compound to the slurry comprising the dissolved cesium; and separating the predetermined cesium compound. In one embodiment of the invention there is provided a method for producing a predetermined cesium compound from an ore comprising cesium aluminosilicate comprising: treating an ore comprising cesium aluminosilicate with an acid to form a slurry and dissolve at least a portion of the cesium contained in the ore; adding a base comprising slaked lime or calcium carbonate and a quantity of an acid containing the anion of the predetermined cesium compound to the slurry comprising dissolved or solubilized cesium; and separating the predetermined cesium compound. A drilling fluid or heavy medium separation fluid comprising the predetermined cesium compound of the process and having a specific gravity of between about 1.2 g/cm3 and about 2.5 g/cm3 and having less than 85% by weight of the predetermined cesium compound on a solution basis is also disclosed.
摘要翻译:公开了一种制备预定铯化合物的方法。 该方法包括用合适的试剂处理含铯材料以溶解材料中所含的铯的至少一部分并形成浆料; 向包含溶解的铯的浆料中加入包含熟石灰或碳酸钙的碱和含有预定铯化合物的阴离子的酸; 并分离预定的铯化合物。 在本发明的一个实施方案中,提供了一种从包含硅酸铝镁的矿石制备预定的铯化合物的方法,其包括:用酸处理包含硅铝酸铯的矿石以形成浆料并溶解所述铯硅酸盐中所含的至少一部分铯 矿石; 向包含溶解或溶解的铯的浆料中加入包含熟石灰或碳酸钙的碱和一定量含有预定铯化合物的阴离子的酸; 并分离预定的铯化合物。 一种钻井液或重介质分离流体,其包含本方法的预定铯化合物,其比重为约1.2g / cm 3至约2.5g / cm 3,并且在溶液中具有小于85重量%的预定铯化合物 也披露了基础。
摘要:
The invention provides water-soluble copolymers without crosslinking, consisting of the following components: A 5-95% by weight of bivalent structural units derived from acrylamidopropenylmethylenesulfonic acid or its salts, B 1-45% by weight of bivalent structural units derived from open-chain N-vinylamides, C 1-45% by weight of bivalent structural units derived from cyclic N-vinyl-substituted amides, and if desired D 0-50% by weight of a further comonomer selected from the group consisting of acrylamide, acrylic acid and acrylonitrile, the components A to C and, if present, D adding up to 100% by weight.
摘要:
Compositions and methods useful in creating boreholes, tunnels and other excavations in unstable soils and earth formations, especially those composed partially or wholly of sand, gravel or other granular or permeable material are disclosed. The fluids include a polymer, and a soluble silicate ion source. The fluids of the invention, when used according to the methods of the invention, have unique dual functionality as excavating fluids and as earth-grouting or soil-hardening compositions.
摘要:
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 soluble or dispersible in the aqueous liquid in an amount sufficient to increase the viscosity of the aqueous liquid, an enzyme breaker which degrades the polysaccharide at a temperature above 180° F. Fracturing fluid compositions and enzyme breaker systems useful for carrying out the invention are also disclosed.
摘要:
A drilling fluid having a brine base fluid, aluminum chlorohydrate as a viscosifying agent, an alkoxylated surfactant, and an amphoteric polymer encapsulant has been found to have excellent viscoelasticity and suspension characteristics. Surprisingly, it has been discovered that a synergistic effect is present between the aluminum chlorohydrate and the surfactant such that less of each component is required when both are used together to suspend the same amount of solids, than if one or the other is used separately.
摘要:
Additives for drilling fluids, in particular for water-based drilling fluids are described which when added to the fluid at levels of up to 10% weight by volume reduces the accretion and bit-balling tendencies of shale cuttings exposed to said fluids. The additives are based on phosphonate chemistry, and are of the general class (I), wherein R, R′ and R″ are radicals exclusively containing H atoms or combinations of H, C, O or P atoms up to a maximum of 100 atoms.