Abstract:
The invention concerns a threaded component for a seizure-resistant tubular threaded joint wherein a lubricating substance is deposited in a thin film on at least the surface of the threads of the threading, said surface being treated to adsorb said lubricating substance. The lubricating substance consists of a homogeneous mixture of a) a thickening agent; b) a set of extreme-pressure additives physically and chemically compatible with the thickening agent and comprising at least an extreme-pressure additive with chemical action called chemical EP additive and capable of being used at Hertz pressures not less than 1000 Mpa's; c) an oil. The proportions of the constituents of the lubricating substance are selected such that said lubricating substance has a consistency capable of ensuring a self-induced and film-forming lubricating process. The invention also concerns a method for producing the thin film.
Abstract:
A rock bit for drilling subterranean formations is lubricated with a grease composition made from a high-viscosity synthetic lubricant basestock and a combination of lubricant additives. The grease composition preferably has in the range of from 1 to 20 percent by weight polyisobutylene, in the range of from 50 to 90 percent by weight ethylene-alphaolefin, up to approximately 40 percent by weight polyalphaolefin, and in the range of from 4 to 45 percent by weight lubricant additives. The rock bit grease composition has a viscosity index in the range of from about 250 to 325, and has an absolute viscosity of greater than about 100,000 centipoise at a temperature of approximately 70.degree. F. and at a shear rate of less than about 40 seconds.sup.-1, without the use of solid metal-containing extreme pressure agents or thickening agents. The grease composition forms a lubricant film having enhanced thicknesses, when compared to conventional mineral oil-based greases, to provide excellent rock bit bearing lubrication.
Abstract:
This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one metal-free thiophosphorus acid ester, at least one amine salt of the thiophosphorus acid ester, or a mixture thereof, wherein the thiophosphorus acid ester contains at least one hydrocarbyl terminated oxyalkylene group, at least one hydrocarbyl terminated polyoxyalkylene group, or a mixture thereof. In one embodiment, the thiophosphorus acid ester is a thiophosphorus acid ester represented by the following formula ##STR1## wherein X.sub.1, X.sub.2, and X.sub.3 are oxygen or sulfur, provided that at least one of X.sub.1, X.sub.2, and X.sub.3 is sulfur; R.sub.1 is a hydrocarbyl group; R.sub.2 is an alkylene group; R.sub.3 is hydrogen or a hydrocarbyl group; x is a number from 1 to about 40; and a is 0, 1, or 2, or at least one salt of the thiophosphorus acid ester. The lubricating compositions, functional fluids and greases have improved antiwear/extreme pressure properties and improved antioxidation properties. In functional fluids, the thiophosphorus acid esters and their salts act as antiwear agents and rust inhibitors.
Abstract:
The present invention includes an aerosol grease precursor composition adapted to be sprayed and a pressurized aerosol grease precursor composition in a dispensing container. The present invention also includes a method of dispensing an aerosol grease composition.
Abstract:
A tire gel balancing composition having a Storage modulus of between 3000 and 15000 Pa and the Specific Gravity less than 1000 kg/m.sup.3 in the temperature range between -20.degree. and +90.degree. C., preferably its Storage modulus is about 9000 Pa, is capable of balancing tires by being able to flow under the vibrations caused by imbalance in a wheel assembly. The composition preferably comprises a mixture of: 1) paraffinic oils, polybutene oils, polyol esters, including castor oil, or polyol ethers; 2) hydrophobic or hydrophilic fumed silica; 3) polyalkyl-methacrylates, styrene-ethylene-propylene block copolymers or polyhydroxycarboxylic acid derivatives; and optionally corrosion inhibitors and antioxidants.
Abstract:
Silicone grease comprising (A) an amino-modified silicone fluid having an amine equivalent of 10,000 to 200,000 g/mol and a viscosity of 10 to 100,000 cs at 25.degree. C., and (B) a thickener exhibits improved heat resistance and low-temperature resistance.
Abstract:
A grease composition for use as a cable filling material which contains about 75 to 95 parts by weight of a base component of a polyol or ester having a molecular weight of at least about 3000 and about 2 to 20 parts by weight of colloidal particles such as silica. Optionally, an antioxidant component can be added to impart high temperature resistance or a rubber component can be added to improve bleed resistance. Also, an article of manufacture of a cable having a sheath with one of the grease compositions of the invention located therein, and a method for filling the cable with such grease compositions.
Abstract:
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
Abstract:
An oil composition contains 100 parts by weight of a base oil selected from the group consisting of mineral base oil, synthetic base oil and mixtures thereof, and 0.1 to 20 parts by weight of a hydrogenated oil obtained by hydrogenating an oil selected from the group consisting of coal type tar, oil produced by fractionating coal type tar, a hydrocarbon obtained by thermally cracking petroleum and having a boiling point of not lower than 200.degree. C., a hydrocarbon obtained by catalytically cracking petroleum and having a boiling point of not lower than 200.degree. C., a hydrocarbon obtained by catalytically reforming petroleum and having a boiling point of not lower than 200.degree. C., and mixtures thereof, whereby the hydrogenated oil has the hydrogen-donating properties of not lower than three times the hydrogen-donating properties of the base oil at temperatures of not lower than 350.degree. C.
Abstract:
An adhesive grease composition comprises a random copolymer of ethylene and an alpha-olefin having the following formula ##STR1## wherein R represents a lower alkyl group, x and y are, respectively, an integer provided that x/y=0.5 to 2.0 and x+y=50 to 150, and a thickening agent in defined amounts.
Abstract translation:粘合剂润滑脂组合物包含乙烯和具有下式的α-烯烃的无规共聚物,其中R表示低级烷基,x和y分别是整数,条件是x / y = 0.5〜2.0,x + y = 50〜150,加稠剂为规定量。