The invention provides a high temperature resistant Portland cement slurry and a production method thereof. The high temperature resistant Portland cement slurry comprises the following components by weight: 100 parts of an oil well Portland cement, 60-85 parts of a high temperature reinforcing material, 68-80 parts of fresh water, 1-200 parts of a density adjuster, 0.1-1.5 parts of a suspension stabilizer, 0.8-1.5 parts of a dispersant, 3-4 parts of a fluid loss agent, 0-3 parts of a retarder and 0.2-0.8 part of a defoamer. The high temperature resistant Portland cement slurry has a good sedimentation stability at normal temperature, and develops strength rapidly at a low temperature. The compressive strength is up to 40 MPa or more at a high temperature of 350° C., and the long-term high-temperature compressive strength develops stably without degradation. Therefore, it can meet the requirements for field application in heavy oil thermal recovery wells, reaching the level of Grade G Portland cement for cementing oil and gas wells.

The present invention relates to an asphalt slurry seal composition comprising a mineral filler comprising an inorganic mineral blend having a multi-modal particle size distribution comprising at least a first maximum in the range of about 0.1 μm to about 15 μm and a second maximum in the range about 5 μm to about 35 μm, wherein about 5 wt. % to about 40 wt. % of the particles in the inorganic mineral blend (dry weight) are in the range of about 0.1 μm to about 15 μm, a pigment component comprised of at least one pigment, an additive component comprising at least one rheology modifier, an asphalt emulsion, optionally one or more functional minerals, and water. Further, the particles of the inorganic mineral blend may be subjected to surface treatments.

The embodiments described herein generally relate to methods and chemical compositions for use with wellbore treatment processes. In one embodiment, a composition is provided comprising a cementitious material, a drilling fluid, or combinations thereof, and an additive composition comprising one or more components selected from the group of an aqueous insoluble lignin, a coke fine, a random tetracopolymer having the formula styrene-butadiene-acrylic-fumaric acid, a polyvinyl acetate, a surfactant composition, and combinations thereof.

A voltage source includes two electrically conductive terminals (101, 102) with an electrolyte (103) between them. Said electrolyte (103) is a mixture in which the main component is ash produced in a power plant or an incineration plant.

The present invention relates to mono- and bisalkylenetrialkoxysilanes of the general formula (I),

##STR00001## in which: —Y— is —O— or —N(R.sup.9).sub.2-a—; —Z— is in each case identical or different and selected from the group consisting of —O— and —CHR.sup.4b—; a is 1 if —Y—=—O—; and is 1 or 2 if —Y—=—N(R.sup.9).sub.2-a—; m is a natural number from 1 to 20; n is a natural number from 7 to 200; R.sup.1 is in each case identical or different and selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and phenyl; and R.sup.2, R.sup.3, R.sup.4a, R.sup.4b, R.sup.5, R.sup.6, R.sup.7R.sup.8, and R.sup.9 in each case independently are H, suitable linear or branched C.sub.1-C.sub.20-alkyl, or optionally C.sub.2-C.sub.20-alkenyl, C.sub.2-C.sub.20-alkynyl, C.sub.1-C.sub.20-alkanoyl, C.sub.3-C.sub.20-alkenoyl, ω-carboxy-(C.sub.1-C.sub.6-alkyl)carbonyl, and ω-carboxy-(C.sub.2-C.sub.6-alkenyl)carbonyl and/or C.sub.7-C.sub.20-aryloyl;
to processes for preparing them and to their use as dispersants in aqueous suspensions composed of aggregates and hydraulic binders; and to these aqueous suspensions as such.

The present invention relates to mono- and bisalkylenetrialkoxysilanes of the general formula (I),

##STR00001## in which: —Y— is —O— or —N(R.sup.9).sub.2-a—; —Z— is in each case identical or different and selected from the group consisting of —O— and —CHR.sup.4b—; a is 1 if —Y—=—O—; and is 1 or 2 if —Y—=—N(R.sup.9).sub.2-a—; m is a natural number from 1 to 20; n is a natural number from 7 to 200; R.sup.1 is in each case identical or different and selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and phenyl; and R.sup.2, R.sup.3, R.sup.4a, R.sup.4b, R.sup.5, R.sup.6, R.sup.7R.sup.8, and R.sup.9 in each case independently are H, suitable linear or branched C.sub.1-C.sub.20-alkyl, or optionally C.sub.2-C.sub.20-alkenyl, C.sub.2-C.sub.20-alkynyl, C.sub.1-C.sub.20-alkanoyl, C.sub.3-C.sub.20-alkenoyl, ω-carboxy-(C.sub.1-C.sub.6-alkyl)carbonyl, and ω-carboxy-(C.sub.2-C.sub.6-alkenyl)carbonyl and/or C.sub.7-C.sub.20-aryloyl;
to processes for preparing them and to their use as dispersants in aqueous suspensions composed of aggregates and hydraulic binders; and to these aqueous suspensions as such.

The present invention relates to mono- and bisalkylenetrialkoxysilanes of the general formula (I),

##STR00001## in which: —Y— is —O— or —N(R.sup.9).sub.2-a—; —Z— is in each case identical or different and selected from the group consisting of —O— and —CHR.sup.4b—; a is 1 if —Y—=—O—; and is 1 or 2 if —Y—=—N(R.sup.9).sub.2-a—; m is a natural number from 1 to 20; n is a natural number from 7 to 200; R.sup.1 is in each case identical or different and selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and phenyl; and R.sup.2, R.sup.3, R.sup.4a, R.sup.4b, R.sup.5, R.sup.6, R.sup.7R.sup.8, and R.sup.9 in each case independently are H, suitable linear or branched C.sub.1-C.sub.20-alkyl, or optionally C.sub.2-C.sub.20-alkenyl, C.sub.2-C.sub.20-alkynyl, C.sub.1-C.sub.20-alkanoyl, C.sub.3-C.sub.20-alkenoyl, ω-carboxy-(C.sub.1-C.sub.6-alkyl)carbonyl, and ω-carboxy-(C.sub.2-C.sub.6-alkenyl)carbonyl and/or C.sub.7-C.sub.20-aryloyl;
to processes for preparing them and to their use as dispersants in aqueous suspensions composed of aggregates and hydraulic binders; and to these aqueous suspensions as such.

A method of sealing propagating cracks in a sensor-laden cement sheath comprising the steps of monitoring an electrical resistivity of the sensor-laden cement sheath to produce a measured value, wherein the sensor-laden cement sheath comprises a conductive sensor, an on-demand expanding agent, and a cement, activating a heat source when the measured value of the electrical resistivity is greater than an activation threshold, increasing a temperature of the sensor-laden cement sheath with the heat source to an activation temperature, wherein the activation temperature is operable to initiate a reaction between the on-demand expanding agent and water, wherein the activation temperature is greater than a formation temperature, reacting the on-demand expanding agent with water to produce a swelled agent, wherein the swelled agent occupies a greater volume than the on-demand expanding agent, and sealing the propagating cracks in the sensor-laden cement sheath with the swelled agent.

A concrete comprises in relative parts by weight: 100 of Portland cement; 0.25 to 9 of a defoamer; 0.001 to 6 of a surfactant; 0 to 230 of coarse gravel and/or fine gravel and/or shear enhancers; 0 to 85 of sand; 0 to 60 of a particulate pozzolanic or non-pozzolanic material or a mixture thereof having a mean particle size less than 15 micrometers; 0 to 80 of a particulate pozzolanic or non-pozzolanic material or a mixture thereof having a mean particle size between 15 to 88 micrometers; 0.3 to 18 of a water-reducing superplasticizer; 0 to 14 of polyethylene fibers; and 5 to 40 of water. An air mixing process using a tightly sealed mixing tool is used to thoroughly mix the constituents of the concrete before adding the water for curing. By adjusting relative parts in the composition, concretes of high and ultrahigh performance can be achieved efficiently.

A concrete comprises in relative parts by weight: 100 of Portland cement; 0.25 to 9 of a defoamer; 0.001 to 6 of a surfactant; 0 to 230 of coarse gravel and/or fine gravel and/or shear enhancers; 0 to 85 of sand; 0 to 60 of a particulate pozzolanic or non-pozzolanic material or a mixture thereof having a mean particle size less than 15 micrometers; 0 to 80 of a particulate pozzolanic or non-pozzolanic material or a mixture thereof having a mean particle size between 15 to 88 micrometers; 0.3 to 18 of a water-reducing superplasticizer; 0 to 14 of polyethylene fibers; and 5 to 40 of water. An air mixing process using a tightly sealed mixing tool is used to thoroughly mix the constituents of the concrete before adding the water for curing. By adjusting relative parts in the composition, concretes of high and ultrahigh performance can be achieved efficiently.