摘要:
Synthetic swellable layer silicates corresponding to the following formulaMgO.aMA.bAl.sub.2 O.sub.3.cSiO.sub.2.nH.sub.2 O (I)in whichM is Na.sup.+ and Li.sup.+ having an Na:Li ratio of at least 1;A is F.sup.-, OH.sup.- or 1/2O.sup.2- or a mixture thereof;a is 0.1 to 0.6;b is 0 to 0.3;c is 1.2 to 1.7; andn is 0 to 3.0.are used in water-based well-servicing fluids as a high-temperature-stable thixotrope substantially unaffected by alkaline earth metal ions.
摘要:
The invention relates to a process for facilitating the disposal of flowable and pumpable working fluids based on emulsifiers containing W/O invert emulsions--more particularly corresponding auxiliaries of the type used in geological exploration, such as oil-based w/o invert drilling muds--and for the simplified cleaning of solid surfaces soiled therewith, if desired using flowable spraying aids, the process being characterized in that, by selecting and adapting the emulsifiers/emulsifier systems to the oil phase of the invert emulsion, temperature-controlled phase inversion is achieved at temperatures below the in-use temperatures of the w/o invert emulsions, but above the freezing point of the aqueous phase and in that disposal and cleaning are carried out at temperatures in and/or below the phase inversion temperature range. The invention also relates to the use of this process for the cleaning and disposal of roc cuttings covered with residual drilling mud from geological exploration during and/or preferably before their on-shore or off-shore dumping
摘要:
The invention relates to the use of at least predominantly linear hydrocarbon compounds olefinically unsaturated in the alpha-position with flashpoints of at least about 80.degree. as the oil phase or as part of the oil phase of oil- or water-based free-flowing borehole servicing preparations. Particular significance is attributed to corresponding drilling fluids which, together with the alpha-olefins, contain other oil phases from the field of borehole servicing preparations and are distinguished by ecological compatibility, being degradable under both aerobic and anaerobic conditions. Suitable mixture components for the oil phase are, in particular, oleophilic alcohols, ethers and corresponding esters selected from carboxylic acid esters and/or carbonic acid esters.
摘要:
A process is described for rock consolidation, e.g. in tunnel construction and mining, by injection of aqueous preparations of melamine resin condensates and/or urea formaldehyde condensates together with an acid curing agent. The process is characterized by the use of aqueous solutions of hydrogen sulfate salts, especially solutions of alkali and/or ammonium bisulfates, as curing agents. The curing agent solutions can contain additional auxiliary agents and active substances such as corrosion inhibitors, structurizers and adhesion agents. Preferred resin solutions for consolidation with these aqueous curing agents contain added zeolite NaA and/or hydrosodalite for increasing their serviceability, and especially for prolonging their storage life.
摘要:
Powder-form lubricant additives for water-based drilling fluids which contain from 95 to 30% by weight, based on the total weight of the powder, of highly disperse silicas, from 5 to 70% by weight, based on the total weight of the powder, of one or more fatty acid alkyl esters corresponding to the following general formula.R.sup.1 COOR.sup.2 (I)in which R.sup.1 is a straight-chain or branched, saturated or mono- or polyunsaturated C.sub.9 -C.sub.21 alkyl or alkenyl radical and R.sup.2 is a straight-chain or branched C.sub.1 -C.sub.12 alkyl radical, and/or polyesters obtainable by reaction of di-, oligo- or poly-hydroxy compounds with carboxylic acids and/or distillation residues from the transesterification of native fatty acid esters and, optionally, other additives known for lubricating purposes in quantities of from 0 to 20% by weight, based on the total weight of the powder, and to the use of these powder-form additives in drilling fluids for oil well and mine drilling in quantities of from 0.01 to 5% by weight, based on the total weight of the drilling fluid.
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:
A low-foam wetting composition which, when mixed with water, enhances the penetration and spread of water on a plant, the composition containing: (a) an alkyl polyglycoside corresponding to formula I R—O—(G)x (I) wherein R is a primary hydrocarbon radical having from 8 to 18 carbon atoms, G is a glycose unit having 5 or 6 carbon atoms, and x is a number from 1 to 10; (b) an olefinically unsaturated alcohol; and (c) a lower water-soluble alcohol.
摘要:
Invert emulsion muds for drilling of gas and oil, which are environmentally safe, and which contain:A. a continuous oil phase composed predominantly of at least one monocarboxylic acid ester of a C.sub.2 -C.sub.12 monofunctional alkalol wherein the monocarboxylic acid contains from 16 to 24 carbon atoms and is olefinically mono- or poly-unsaturated,B. a disperse aqueous phase,C. at least one emulsifier,D. at least one weighing agent,E. at least one fluid loss additive, andF. a mild alkaline reserve.
摘要:
Described is the use of oleophilic esters of ecologically compatible polycarboxylic acids with oil-soluble and ecologically compatible monofunctional alcohols and/or polyfunctional alcohols which may also be watersoluble as the oil phase or as a component of the oil phase of oil-based or water-based drilling fluids and other fluid drill-hole treatment agents. The oleophilic polycarboxylic acid esters are especially suitable as component of the continuous oil phase of inverted fluids of the W/O type. Here--if rheologically suitable compounds will be employed--they may comprise the at least predominant portion of the continuous oil phase; but also possible is the concomitant use of complex oleophilic polycarboxylic acid esters, which are not or just to a restricted degree fluid in a temperature range of from 0.degree. C. to 20.degree. C., as an additive in fluid oils of the class of the non-polluting oils. Here, suitable oil mixing phases especially are oleophilic alcohols, ethers, respective esters of monocarboxylic acids and fluid oils based on oleophilic carbonic acid diesters.
摘要:
Invert emulsion muds for drilling of gas and oil, which are environmentally safe, and which contain:A. a continuous oil phase composed predominantly of at least one monocarboxylic acid ester of a C.sub.2 -C.sub.12 monofunctional alkanol wherein the monocarboxylic acid contains from 16 to 24 carbon atoms and is olefinically mono- or poly-unsaturated,B. a disperse aqeuous phase,C. at least one emulsifier,D. at least one weighting agent,E. at least one fluid loss additive, andF. a mild alkaline reserve.