Abstract:
A threaded joint for pipes comprises a pin 1 and a box 2 each having a contact surface including a threaded portion 3,7 and an unthreaded metal contact portion. The unthreaded metal contact portion includes a sealing surface 5, 8 and a shoulder surface 9, 10, 11, 12. The shoulder surface of the pin is located on the end surface of the pin. A non-contacting region 13 in which the pin and the box do not contact each other is present between the sealing surfaces and the shoulder surfaces of the pin and the box. The threaded joint has one or more grooves formed in the shoulder surface of at least one of the pin and the box and extending to the non-contacting region and to the interior of the threaded joint. At least the contact surface of at least one of the pin and the box has a solid lubricating coating exhibiting plastic or viscoplastic rheological behavior formed thereon. The total volume V (mm 3 ) of the grooves and the coating weight W (g) of the solid lubricating coating satisfy the equation V/W ≥ 24 (mm 3 /g).
Abstract:
A film-forming lubrication composition for make-up of threaded connections, intended to cover at least one threading (FE, FI) and a make-up abutment (BVM, BVF) of a threaded element (EM, EF) of a component (T2, T1) of a threaded tubular connection (JF) with a solid state film which adheres to the threading (FE, FI) and to said make-up abutment (BVM, BVF), said make-up abutment (BVM, BVF) being intended to bear against another abutment (BVF, BVM) of another component (T1, T2) of said threaded tubular connection (JF) during the terminal make-up phase, and said lubrication composition comprising a matrix. The matrix further comprises at least one rheoresistant material selected so as to endow said composition, as a complement to lubrication, with a shouldering torque which is at least equal to a threshold value.
Abstract:
The invention relates to an adhesive thin lubrication composition for covering at least one thread (FI) and a screwing abutment (BVF) of the threaded member (EF) of a component (T1) of a tubular threaded seal (JF). The screwing abutment bears against another abutment (BVM) of another component (T2) of the tubular threaded seal (JF) in the terminal screwing phase. The lubrication composition includes a matrix having dispersed therein at least one braking additive selected in order to impart thereto, and on top of the lubrication, a friction coefficient selected so as to obtain a torque on abutment value at least equal to a threshold value.
Abstract:
Une composition de lubrification adhésive, mince, est destinée à recouvrir au moins un filetage (FI) et une butée de vissage (BVF) d'un élément fileté (EF) de composant (T1) d'un joint fileté tubulaire (JF). La butée de vissage est destinée à s'appuyer contre une autre butée (BVM) d'un autre composant (T2) du joint fileté tubulaire (JF) en phase terminale de vissage. La composition de lubrification comporte une matrice dans laquelle est dispersé au moins un additif de freinage choisi de manière à lui conférer, en complément de la lubrification, un coefficient de frottement choisi pour permettre l'obtention d'une valeur de couple sur butée au moins égale à une valeur seuil.
Abstract:
A composition that includes solid lubricant nanoparticles and an organic medium is disclosed. Also disclosed are nanoparticles that include layered materials. A method of producing a nanoparticle by milling layered materials is provided. Also disclosed is a method of making a lubricant, the method including milling layered materials to form nanoparticles and incorporating the nanoparticles into a base to form a lubricant.
Abstract:
The coating (11) comprises a solid matrix adhering to the substrate (13) in which are dispersed particles of solid lubricants from at least two classes which are selected to exert a synergistic effect between themselves and with the constituents of the matrix. Protection against corrosion and against galling of the threadings of threaded elements used in hydrocarbon wells.
Abstract:
The production of solid lubricant agglomerates by combining solid lubricant powder, an inorganic binder, other fillers if optionally desired, and a liquid to form a mixture, and driving off the liquid to form dry agglomerates which are subsequently classified by size or milled and classified by size to yield agglomerates of a desired size range. These agglomerates are then treated to stabilize the binder, thereby strengthening the binder and rendering it nondispersible in the liquid. The undesired size ranges can be readily recycled because the agglomerates with untreated binder can be reprocessed, thereby promoting high recovery rates.
Abstract:
A lubricant coating disposed between a substrate and a counter surface comprises a reaction layer immediately adjacent the substrate. A bonding layer is immediately adjacent the reaction layer, with the bonding layer comprising a first composition. A low friction, lubricious layer is immediately adjacent the bonding layer, with the lubricious layer comprising a second composition that is different from the first composition.
Abstract:
A material having improved hardness characteristics and bearing, lower friction coefficient and increased service life in clusters of sliding friction contains powder of copper, iron, phosphorus, graphite, dust of disulphide of molybdenum and steel substrate made out of low carbohydrate steel. The material has a bimetal structure with granules inserted in a matrix. The material of the invention is especially useful in the machine-building industry, particularly for the production of blocks for units of sliding friction in machines, mechanisms and equipment.