Various implementations include electric centrifugal pump assemblies for producing oil from wells. A submersible electric motor includes a housing, a shaft inside said housing that transmits rotational power from the electric motor section to the pump section, a mechanical seal surrounding the shaft to keep a dielectric fluid inside the electric motor, and a unit for compensating the volume of the dielectric fluid. Said unit maintains a constant positive pressure and includes a spring mounted inside a metal bellows. The spring is arranged in a tensioned state inside a cavity containing dielectric fluid. The spring is rigidly fastened facing the electric motor and to the bottom of the bellows such as to be capable of axial movement. The volume compensation unit is provided with a sensor for sensing the position of the spring/bellows. The cavity is filled with a barrier fluid preventing scale build-up.
E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
F04D 13/08 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée
F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
Various implementations include a safety valve for mounting in a landing nipple in a wellbore. The safety valve includes a composite housing having a central passage, a shutoff element and a control mechanism. The shutoff element includes a collet and a movable mandrel having stops located in the upper part. When the shutoff element moves axially, the stops extend through the composite housing to interact with a landing nipple stop surface. The control mechanism includes a spring-loaded tubular plunger having a ring piston on its upper outer surface and longitudinal openings in its lower part, the openings being configured to align with openings in the composite housing. The movable mandrel is connected to the safety valve head at the mandrel top and rests against the plunger at the mandrel bottom. The movable mandrel has grooves and shoulders on its outer surface, which allow for taking one of the fixed positions.
E21B 34/08 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits sensibles à l'écoulement ou à la pression du fluide obtenu
E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
F04D 15/00 - Commande, p. ex. régulation de pompes, d'installations ou de systèmes de pompage
F04D 15/02 - Arrêt de pompes ou de soupapes en cas de fonctionnement indésirable
F16K 17/02 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté
The invention relates to pumping installations for pumping liquid at high pressure, for example, to maintain formation pressure. The present horizontal pumping installation comprises a supporting frame, an electric motor connected by a coupling to a thrust chamber, and a multistage centrifugal pump. The thrust chamber is equipped with an external oil pump and force-cooled radiators, which provide for the circulation of oil. Said oil pump is connected to the inner cavity of the thrust chamber by an upper nozzle and a lower nozzle. Inside the thrust chamber, end seals separate off a bearing cavity containing an axial bearing that is fully submerged in oil and is under positive pressure. The thrust chamber contains two radial bearings. The invention is directed toward improving the operating characteristics and reliability of the installation.
The invention relates to oil field equipment and can be used for producing oil under conditions complicated by a high gas-to-oil ratio. A submersible pump assembly on a load-bearing cable is mounted inside a production tubing. The assembly comprises a motor lead extension, an upper seal section, an electric motor, a lower seal section, a discharge module, an electric centrifugal pump of the inverted type, sealing assemblies, and a tandem gas separator having an inlet grate in its lower part and outlet ports in its upper part. Mounted on the end of the string is a shutoff device with radial ports situated above the level of the fluid to be pumped. A sealing assembly is provided with sealing collars that close off the string and perform the function of a packer device. The tandem gas separator comprises an upper gas separator and a lower gas separator and is fastened in the shutoff device. The inlet grate of the gas separator is disposed below the shutoff device, and the discharge ports of the upper gas separator are disposed above the level of the borehole fluid, opposite the radial ports of the shutoff device. The technical result is that of providing for uninterrupted, reliable operation of the assembly by diverting the separated gas into the casing annulus.
F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
F04D 31/00 - Pompage simultané de liquides et de fluides compressibles
The invention relates to the oil production industry, and more particularly to downhole devices for the repeated pressure testing of a tubing string in a well, inter alia of small diameter. The technical result is a reduction in the time and labour required to install a packer. The present packer comprises: a barrel with a shaped slot on the outer surface, said slot having alternate short and long axial portions interconnected by a closed shaped portion; a sealing collar; a rod with a central channel; a casing; and a centering element. The casing comprises a guide pin that is disposed in the shaped slot and is axially movable along the barrel. The collar is mounted for axial movement on the outer surface of the rod and is fixed from below by a support and from above by a housing that is axially spring-loaded toward a head. The housing is configured for axial movement along the rod. The head is provided along its circumference with a centering element. Additionally provided above the sealing collar is a docking release assembly comprising a fishing head.
The inventions relate to the oil industry and can be used for installing electric centrifugal submersible pump assemblies on carrying cables. The present installation method includes placing a retrievable packer on the bottom end of a tubing string, successively mounting a cable hanger assembly, a Christmas tree, a blowout preventer assembly, and a lubricator with a sealing assembly, lowering an electric centrifugal pump and an insert safety valve into the tubing string via the lubricator using a carrying cable, coupling the insert safety valve to a seat, and connecting the top end of the carrying cable to the cable hanger assembly. The cable hanger assembly is positioned higher than the Christmas tree, and the retrievable packer is suspended on the electric centrifugal pump, the two being lowered together with the safety valve into the well via the lubricator. The method can be used for installing pump assemblies in live wells without prior preparation of downhole equipment in the well, or for installing a pump assembly in a well that already contains an electric centrifugal pump assembly, such as a failed assembly. The technical result is a simplification of the process of installing an electric centrifugal pump assembly on a carrying cable, and a reduction in labour intensity as a result of obviating the additional effort of tripping a tubing string out and in.
F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
F04D 29/62 - MontageAssemblageDémontage des pompes radiales ou hélicocentrifuges
7.
Y-SHAPED BYPASS DEVICE FOR A SUBMERSIBLE PUMP ASSEMBLY
The invention relates to oil-submersible equipment and can be used in bypass systems for submersible pump assemblies as an improved Y-tool. The present device has two branches at one end for connection to a submersible pump assembly and to a string of bypass tubing, and a common outlet at the opposite end in the head of a Y-block. Mounted inside the Y-block such as to be capable of alternately closing off said branches is a hinged flapper valve in the form of a disc. The hinged flapper valve is provided with a spring and is fastened with the aid of a pivot pin to a separate housing mounted in the branch that connects to the string of bypass tubing. Along the edge of the outer end face of the disc relative to said separate housing there is provided a lip in the shape of a hollow segment of a dome. The crown of the hollow segment of a dome is oriented upwards, and the open cavity is oriented in the direction of the pivot pin of the disc. The technical result consists in increasing the operating reliability of the assembly and making it possible to close off and hermetically seal the bypass tubing string branch in the event of small supplies of fluid flow.
E21B 34/08 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits sensibles à l'écoulement ou à la pression du fluide obtenu
E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
8.
SAFETY VALVE FOR A SUBMERSIBLE ELECTRIC CENTRIFUGAL PUMP UNIT
The invention relates to the oil industry and can be used for oil production. A safety valve is mounted in a borehole landing nipple and comprises a composite housing having a central bore, a shut-off member and a control mechanism. The shut-off member consists of a collet and a movable mandrel having locking lugs disposed in the upper part thereof, said locking lugs being capable, in the event of axial movement of the shut-off member, of extending through through-slots in the housing and interacting with a stop surface of the landing nipple. The control mechanism is configured in the form of a spring-loaded tubular plunger having an annular piston on its top outer surface and a series of longitudinal openings in its lower part, said openings being capable of aligning with similar openings in the composite housing to allow the valve to function. The movable mandrel is connected at the top to the head of the safety valve and is thrust at the bottom into the plunger. The movable mandrel has on its outer surface a series of grooves and protuberances, which, with the aid of the collet and locking balls, allow one of a number of fixed positions to be assumed. The technical result is that of providing uninterrupted reliable operation of an electric centrifugal pump.
E21B 34/08 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits sensibles à l'écoulement ou à la pression du fluide obtenu
E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
9.
SUBMERSIBLE ELECTRIC MOTOR WITH A SYSTEM FOR MAINTAINING A CONSTANT POSITIVE PRESSURE
The invention relates to electric centrifugal pump assemblies for producing oil from wells. A submersible electric motor comprises a housing, a shaft which rotates inside said housing and transmits rotational power from the electric motor section to the pump section, a mechanical seal which radially surrounds the shaft to keep a dielectric fluid inside the electric motor, and a unit for compensating the volume of the dielectric fluid, said unit having disposed therein a system for maintaining a constant positive pressure, comprising a metal bellows. The system for maintaining a constant positive pressure is provided with a spring mounted inside the metal bellows. The spring is arranged in a tensioned state inside a cavity containing dielectric fluid; the upper end of the spring is rigidly fastened facing the electric motor, and the lower end of the spring is attached to the bottom of the bellows such as to be capable of axial movement. The shaft is surrounded by a sequence of mechanical seals, forming a cavity that is filled with a barrier fluid. The volume compensation unit is provided with a sensor for sensing the position of the spring/bellows. The invention prevents well fluid from entering the cavity of the electric motor during the entire operating period thereof, allows monitoring of the system for maintaining a positive pressure, and enhances the reliability of the electric motor while increasing the mean time to failure.
F04D 13/08 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée
The invention relates to the oil industry and the production of oil. An insert safety valve is mounted inside a piping safety valve in a production tubing string and comprises a housing having a longitudinal bore, an upper landing assembly with extendable slips for fixing inside the piping safety valve having a landing nipple, a hydraulic line, annular seals and a valve device with a spring-driven element. The insert safety valve is mounted on a carrying cable, the hydraulic line has tubes connected to two valves. The first valve is connected to the piping safety valve housing in the production tubing string, and the second valve extends to a port in the inner portion of the landing nipple. A hollow sleeve functions as a moving element, and the valve device is formed as openings in the sleeve and in the housing, wherein the openings are configured to being aligned.
E21B 34/10 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par un fluide de commande provenant de l'extérieur du trou de forage
E21B 23/02 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour verrouiller les outils ou autres éléments sur des supports ou dans des retraits entre sections adjacentes du tubage
The invention relates to the oil industry and can be used for oil production. An insert safety valve is mounted inside a tubing safety valve in a production tubing string (2) and comprises a housing (25) having a longitudinal channel, an upper landing assembly with extendable latching keys (20) for fastening inside the tubing safety valve, which has a landing nipple (7), a hydraulic line (3), annular seals (21, 22), and a valve device with an element that moves under the action of springs (27). The insert safety valve is mounted on a load-bearing cable (16), and the hydraulic line (3) is provided with tubes (5, 6) connected to two valves (9, 10). The first valve (10) is connected to the housing of the tubing safety valve (11) in the production tubing string (2), and the second valve (9) is connected to a port (23) in an inner portion of the landing nipple (7). The moveable element is a hollow sleeve (26), and the valve device is configured in the form of alignable openings (28, 30) in the sleeve (26) and the housing (25) respectively. In an alternative design variant, the safety valve is equipped with a separate hydraulic line (32) that can be controlled from the surface and passes along the longitudinal channel of the housing (25). The technical result is to allow the tubing safety valve to remain functional after extraction of the insert safety valve.
E21B 34/10 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par un fluide de commande provenant de l'extérieur du trou de forage
12.
Flangeless coupling having an embedded ring segment joining components of a submersible pump unit
A small-sized submersible pump unit having a submersible motor, discharge module, pump housings which are connected by flangeless coupling is disclosed. The flangeless coupling is made using embedded ring segments. The coupled housings each have the covering and the covered parts, and the covered part of one of the housings contains a blind rectangle groove, and the covering part of another housing has a through rectangle groove, and the grooves form a cavity having an embedded ring segment.
F04D 13/08 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée
F04D 29/64 - MontageAssemblageDémontage des pompes axiales
F04D 29/42 - Carters d'enveloppeTubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges
F04D 29/40 - Carters d'enveloppeTubulures pour le fluide énergétique
F04D 29/62 - MontageAssemblageDémontage des pompes radiales ou hélicocentrifuges
F04D 29/52 - Carters d'enveloppeTubulures pour le fluide énergétique pour pompes axiales
F16L 37/138 - Accouplements du type à action rapide dans lesquels l'assemblage entre les extrémités s'aboutant ou se chevauchant est maintenu par des organes de blocage utilisant des crochets, cliquet, ou autres organes de blocage mobiles ou que l'on peut insérer utilisant un manchon mobile axialement
F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
F16L 37/14 - Raccords par insertion d'un élément entre surfaces à unir, p. ex. par un bout de fil, une goupille, une chaîne
F16L 37/22 - Accouplements du type à action rapide dans lesquels l'assemblage est maintenu par des billes, rouleaux ou ressorts hélicoïdaux sous pression radiale entre parties
F04D 29/70 - Grilles d'aspirationFiltresSéparateurs de poussièreNettoyage
E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
E21B 47/12 - Moyens pour la transmission de signaux de mesure ou signaux de commande du puits vers la surface, ou de la surface vers le puits, p. ex. pour la diagraphie pendant le forage
The invention relates to petroleum extraction equipment and specifically to small immersion pump assemblies which are lowered into wells on a load-bearing cable inside an additional pipe. The technical result consists in increasing the reliability of a small immersion pump assembly in the process of operation, eliminating the overheating of an immersion motor, and simplifying the installation of a pump assembly. Said result is achieved via a small immersion pump assembly containing an immersion motor, a discharge module and a pump, the housings of which are connected to one another via a flangeless connection, in which the flangeless connection is carried out using ring insert segments, the housings to be connected each having an encompassing portion and an encompassed portion of the housing, the encompassed portion of one housing containing a closed-ended rectangular groove, and the encompassing portion of another housing containing an open-ended rectangular groove, said grooves forming a cavity in which a ring insert segment is disposed.
F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
The invention relates to petroleum extraction equipment and specifically to small immersion pump assemblies which are lowered into wells on a load-bearing cable inside an additional pipe. The technical result consists in increasing the reliability of a small immersion pump assembly in the process of operation, eliminating the overheating of an immersion motor, and simplifying the installation of a pump assembly. Said result is achieved via a small immersion pump assembly containing an immersion motor, a discharge module and a pump, the housings of which are connected to one another via a flangeless connection, in which the flangeless connection is carried out using ring insert segments, the housings to be connected each having an encompassing portion and an encompassed portion of the housing, the encompassed portion of one housing containing a closed-ended rectangular groove, and the encompassing portion of another housing containing an open-ended rectangular groove, said grooves forming a cavity in which a ring insert segment is disposed.
F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
A multi-stage vane-type positive displacement pump used for lifting fluid from oil wells has stages disposed on a common shaft. Each stage has a rotor, a stator, separating vanes, working chambers, a lower cap with inlet ports, and an upper cap with outlet ports. The rotor is in the form of a cam. The stator is formed from two concentric sleeves situated on a base and having an annular gap therebetween. Slots are provided in the inner sleeve and in the base for the movement of the vanes. The vanes are connected to one another by a synchronizing element. The ports are situated opposite the chambers, either side of the vanes. The end faces of the caps of adjacent stages are conjoined to form an annular cavity, which communicates with the gap of the preceding stage. The aim is to increase the reliability of the pump, to simplify the design and to reduce the manufacturing cost thereof while enabling the pumping of fluids with a high content of abrasive particles.
F04C 11/00 - Combinaisons de plusieurs "machines" ou pompes, chacune d'elles étant du type à piston rotatif ou oscillantInstallations de pompage
F04C 2/356 - Machines ou pompes à piston rotatif possédant les caractéristiques couvertes par au moins deux des groupes , , , ou par l'un de ces groupes en combinaison avec un autre type de mouvement entre les organes coopérants avec à la fois le mouvement défini dans l'un des groupes ou et un mouvement alternatif relatif entre les organes coopérants les organes obturateurs ayant un mouvement alternatif par rapport à l'organe externe
F04C 15/00 - Parties constitutives, détails ou accessoires des "machines", des pompes ou installations de pompage non couverts par les groupes
brevets
