Abrégé

A downhole pump drive includes a housing, a submersible electric motor and protector, the drive shaft of which is coupled to the screw of a ball screw actuator movably coupled to the housing and is coupled to a rod sealed inside the housing. Interior cavities of the housing communicate with an annular space of the borehole through an elastic shell. The drive shaft of the electric motor is connected to the ball screw actuator via a reverse reduction gear. The reverse reduction gear is switched only when the nut of the ball screw actuator (or of an additional ball screw actuator) arrives at its terminal positions, improving the drive's operational reliability. The electric motor operates in a continuous mode, increasing reliability and energy efficiency of the drive owing to the absence of repeated starting and stopping of the electric motor; consequently, a spike in current intensity upon start-up is avoided.

Classes IPC  ?

• E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
• F04B 47/06 - Pompes ou installations de pompage spécialement adaptées pour élever un fluide à partir d'une grande profondeur, p. ex. pompes de puits dont les ensembles pompe-moteur sont placés à grande profondeur
• F16H 25/12 - Transmissions comportant essentiellement et uniquement des systèmes came et galet ou des mécanismes à vis et écrous pour convertir un mouvement rotatif en mouvement alternatif et vice versa avec mouvement alternatif selon l'axe de rotation, p. ex. transmissions à gorges hélicoïdales et inversion automatique
• F04B 17/03 - Pompes caractérisées par leur combinaison avec des machines motrices ou moteurs particuliers qui les entraînent ou par leur adaptation à ceux-ci entraînées par des moteurs électriques
• F04B 9/02 - "Machines" ou pompes à piston caractérisées par les moyens entraînants ou entraînés liés à leurs organes de travail les moyens étant mécaniques

Abrégé

The invention relates to the field of pumping equipment and can be used in the oil industry in the operation of marginal wells. A pump comprises a submersible electric motor with a protector. A drive of a working pump converts rotary motion into reciprocating motion. The working pump consists of a housing, an intake valve, a delivery valve, and a bypass valve, a main cylinder, and a hollow stepped plunger, the lower step of which is connected to a rod and has a diametral size that is smaller than the diametral size of the upper step. Below the main cylinder an additional cylinder is provided which accommodates the lower step of the hollow stepped plunger. The main cylinder is not rigidly fastened inside the housing. The fact that the main cylinder is not rigidly fastened allows it to self-align relative to the hollow stepped plunger, thus preventing jamming and increasing the operating reliability and the working life of the pump.

Classes IPC  ?

• F04B 47/06 - Pompes ou installations de pompage spécialement adaptées pour élever un fluide à partir d'une grande profondeur, p. ex. pompes de puits dont les ensembles pompe-moteur sont placés à grande profondeur
• F04B 17/03 - Pompes caractérisées par leur combinaison avec des machines motrices ou moteurs particuliers qui les entraînent ou par leur adaptation à ceux-ci entraînées par des moteurs électriques
• E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits

Abrégé

The invention relates to pumping equipment and can be used in oil industry as part of submersible electric centrifugal pump units. Device for prevention of turbine rotation consists of interconnected head and base, inside of which two shafts are installed on bearing supports—upper and lower ones, connected to each other through a cam clutch with the possibility of free running in the circumferential direction. The overrunning clutch is installed in the head, providing torque transmission in the forward direction from the lower shaft to the upper one and preventing reverse rotation of the upper shaft. The overrunning clutch is connected with the upper shaft via a coupling clutch, movable part of which is mounted on the upper shaft with possibility of axial movement, and stationary part is rigidly connected to the overrunning clutch. Coupling of the coupling clutch is provided by a spring, and disconnection is provided by a pusher mounted on the upper shaft with possibility of axial movement, and on one side the pusher is connected to the movable part of the coupling clutch and on the other side—with a bush sleeve having an inclined end surface rigidly installed on the lower shaft. The technical result is to increase reliability and safety of Electric Centrifugal Pumping Unit due to use of the apparatus for preventing rotation of the turbine.

Classes IPC  ?

• F16D 41/18 - Roues libres ou embrayages à roue libre avec cliquet d'arrêt non articulé
• E21B 4/00 - Moyens d'entraînement dans le trou de forage
• E21B 4/04 - Moyens d'entraînement électriques
• F16D 45/00 - Roues libres ou embrayages à roue libre combinés avec des embrayages automatiques

Abrégé

The invention relates to petroleum engineering, and more particularly to the design of a check valve that can be used in conjunction with downhole sucker-rod pumps or electric centrifugal pumps primarily intended for pumping fluids with a high solid particle content. A ball check valve comprises: a hollow cylindrical housing having an internal annular protrusion; a valve pair mounted inside said housing and being in the form of an annular seat and a ball locking member; and a means for limiting the movement of the closure member, which is in the form of a cage with through holes for fluid flow. Between the seat and the cage there is mounted an annular elastic member, the inner diameter of which is not greater than the diameter of the ball locking member. The annular elastic element performs a dual function: when closing the valve provides additional pressing of the ball locking element to the seat due to the arising elastic forces; and provides additional sealing. Also, in the open position, additional forces do not act on the ball locking element, which reduces the hydraulic resistance of the valve. Thus, the use of an annular elastic element in the design of the check valve increases the valve life and increases its energy efficiency during operation.

Classes IPC  ?

• F16K 15/04 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés en forme de sphère

Abrégé

The invention relates to oil production equipment and can be used for actuating submersible downhole plunger pumps in the operation of marginal wells. A drive of a downhole pump comprises a housing, a submersible electric motor with a protector, the drive shaft of which is coupled to the screw of a ball screw actuator that is movably coupled to the housing and is coupled to a rod which is sealed inside the housing. The interior cavities of the housing are filled with oil and are in communication with the borehole cavity via an elastic membrane. The drive shaft of the electric motor is connected to the ball screw actuator via a reverse reduction gear having a switching mechanism. The reverse reduction gear is switched only when the nut of the ball screw actuator (or of an additional ball screw actuator) arrives at its terminal positions, thus improving the operational reliability of the drive. The electric motor operates in a continuous mode, which increases the reliability and energy efficiency of the drive owing to the absence of repeated starting and stopping of the electric motor; consequently, a spike in current intensity upon start-up is avoided. Therefore, the solutions used in the invention make it possible to improve the reliability and energy efficiency of the drive of a downhole pump.

Classes IPC  ?

• F04B 47/06 - Pompes ou installations de pompage spécialement adaptées pour élever un fluide à partir d'une grande profondeur, p. ex. pompes de puits dont les ensembles pompe-moteur sont placés à grande profondeur

Abrégé

The invention relates to the field of pumping equipment and can be used in the oil industry in the operation of marginal wells. A pump comprises a submersible electric motor with a protector. A drive of a working pump converts rotary motion into reciprocating motion. The working pump consists of a housing, an intake valve, a delivery valve, and a bypass valve, a main cylinder, and a hollow stepped plunger, the lower step of which is connected to a rod and has a diametral size that is smaller than the diametral size of the upper step. Below the main cylinder an additional cylinder is provided which accommodates the lower step of the hollow stepped plunger. The main cylinder is not rigidly fastened inside the housing. The fact that the main cylinder is not rigidly fastened allows it to self-align relative to the hollow stepped plunger, thus preventing jamming and increasing the operating reliability and the working life of the pump.

Classes IPC  ?

• F04B 47/06 - Pompes ou installations de pompage spécialement adaptées pour élever un fluide à partir d'une grande profondeur, p. ex. pompes de puits dont les ensembles pompe-moteur sont placés à grande profondeur

Abrégé

The invention relates to petroleum engineering, and more particularly to designs for check valves that can be used in conjunction with downhole sucker-rod pumps or electric centrifugal pumps primarily intended for pumping fluids with a high solid particle content. A ball check valve comprises: a hollow cylindrical body having an internal annular ledge; a valve pair mounted inside said body and being in the form of an annular seat and a ball closure member; and a means for limiting the movement of the closure member, which is in the form of a cage with through apertures for the passage of fluid. Between the seat and the cage there is mounted an annular resilient member, the inside diameter of which is not greater than the diameter of the ball closure member. The annular resilient member performs two functions: on closure of the valve, it provides additional clamping of the ball closure member to the seat as a result of the resilient forces produced; and it provides additional sealing integrity. Also, unlike in the prototype, when the valve is in an open position, there are no additional forces (the elastic force of a spring in the prototype) acting on the ball closure member, hence the hydraulic resistance of the valve is reduced. Therefore, the introduction of an annular resilient member into the design of the check valve increases the service life of the valve and improves its energy efficiency during operation.

Classes IPC  ?

• 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
• F16K 15/04 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés en forme de sphère