Abrégé

A drive shaft assembly for use with downhole mud motors is capable of handling greater torque and thrust forces. The drive shaft assembly has an elongated central drive shaft, and at least one end housing optionally disposed at one or both ends of the central drive shaft. At least one end of the central drive shaft defines a rounded or partially-spherical outer end surface and a plurality of elongate protrusions or “keys” that extend radially outward from the exterior surface of the shaft. Each end housing has a concave interior surface defining a seat for receiving a rounded end surface of the central drive shaft, as well as a plurality of circumferentially spaced axial keyways adapted to receive and engage with the keys in mating relationship. The shaft and end assemblies cooperate to facilitate omnidirectional pivotal movement and the transfer of torque forces between the shaft and each of said end housings.

Classes IPC  ?

• E21B 7/06 - Modification de la direction du trou de forage
• E21B 4/02 - Moyens d'entraînement de type rotatif par fluide

Abrégé

A drive shaft assembly for use with downhole mud motors is capable of handling greater torque and thrust forces. The drive shaft assembly has an elongated central drive shaft, and at least one end housing optionally disposed at one or both ends of the central drive shaft. At least one end of the central drive shaft defines a rounded or partially- spherical outer end surface and a plurality of elongate protrusions or "keys" that extend radially outward from the exterior surface of the shaft. Each end housing has a concave interior surface defining a seat for receiving a rounded end surface of the central drive shaft, as well as a plurality of circumferentially spaced axial keyways adapted to receive and engage with the keys in mating relationship. The shaft and end assemblies cooperate to facilitate omnidirectional pivotal movement and the transfer of torque forces between the shaft and each of said end housings.

Classes IPC  ?

• E21B 17/04 - AccouplementsJoints entre tige et trépan, ou entre tiges
• E21B 17/05 - Joints à pivot

Abrégé

There is provided a fixed bend assembly comprising a first bend housing, a second bend housing and an annular spacer. The width of the annular spacer determines a circumferential orientation of a high side of the first bend housing relative to a high side of the second bend housing when the first bend housing and second bend housing are connected by a threaded connection to provide a total bend angle of the fixed bend assembly, whereby the total bend angle is an angle between a longitudinal axis of one end of the fixed bend assembly and a longitudinal axis of the opposite end of the fixed bend assembly when the first bend housing and the second bend housing are connected.

Classes IPC  ?

• E21B 7/06 - Modification de la direction du trou de forage
• E21B 17/04 - AccouplementsJoints entre tige et trépan, ou entre tiges
• E21B 17/042 - AccouplementsJoints entre tige et trépan, ou entre tiges filetés

Abrégé

A hydraulic jar having multiple high pressure chambers includes a jar body comprising an inner body telescopically engaged by an outer body. There is a first contact surface carried by the inner body, and a second contact surface carried by the outer body that engage when the jar body is moved to the jarring position. A plurality of axially spaced pressure chambers are spaced axially along the jar body, with each pressure chamber having a hydraulic delay section and a jarring section. A piston separates the pressure chamber. A hydraulic delay is in fluid communication with a high pressure section and a low pressure section of each pressure chamber and permits movement of the piston toward the second end at a first speed. A jarring valve permits movement of the piston toward the second end at a second speed that is greater than the first speed when in a japing section.

Classes IPC  ?

• E21B 31/113 - Repêchage ou dégagement d'objets dans les trous de forage ou dans les puits en utilisant des moyens de percussion pour dégager les parties coincées, p. ex. des coulisses de battage fonctionnant hydrauliquement

Abrégé

A hydraulic jar having multiple high pressure chambers includes a jar body comprising an inner body telescopically engaged by an outer body. There is a first contact surface carried by the inner body, and a second contact surface carried by the outer body that engage when the jar body is moved to the jarring position. A plurality of axially spaced pressure chambers are spaced axially along the jar body, with each pressure chamber having a hydraulic delay section and a jarring section. A piston separates the pressure chamber. A hydraulic delay is in fluid communication with a high pressure section and a low pressure section of each pressure chamber and permits movement of the piston toward the second end at a first speed. A jarring valve permits movement of the piston toward the second end at a second speed that is greater than the first speed when in a jarring section.

Classes IPC  ?

• E21B 12/00 - Accessoires pour outils de forage
• E21B 31/113 - Repêchage ou dégagement d'objets dans les trous de forage ou dans les puits en utilisant des moyens de percussion pour dégager les parties coincées, p. ex. des coulisses de battage fonctionnant hydrauliquement

Produits et services

Manufacturing of oil field equipment for others

Produits et services

Manufacturing of oil field equipment for others

Abrégé

A drive connection for a downhole drilling motor includes a tubular outer housing with an inner mandrel. The outer housing has a motor end, a bit end and defines an interior bore. An angular offset is provided toward the bit end of the outer housing. The inner mandrel, positioned within the interior bore of the outer housing, includes a motor end section, a bit end section and an intermediate section connecting the motor end section and the bit end section. The intermediate section has an upper articulating engagement that is coupled to rotate with the motor end section and a lower articulating engagement that is coupled to rotate with the bit end section. The motor end section, intermediate section and bit end section rotate together, with the upper articulating engagement and the lower articulating engagement accommodating rotation that is offset due to the angular offset.

Classes IPC  ?

• E21B 7/08 - Dispositifs particuliers pour modifier la direction du forage, p. ex. trépans particuliers, joints articulés ou sifflets-déviateurs

Abrégé

An adjustable position load bearing shoulder includes a shaft having an exterior surface with a recessed engagement profile. An engagement member is provided that has an exterior surface having exterior threads. The engagement member also has an engagement engageable with the engagement profile on the shaft. The engagement member defines an external wedge surface. An annular shoulder member is provided that has an interior surface with interior threads engageable with the exterior threads on the engagement member to selectively position the shoulder member. A wedge member is provided that has an internal wedge surface. The internal wedge surface of the wedge member engages the external wedge surface on the engagement member to lock the engagement into engagement with the engagement profile of the shaft. There are fasteners between the wedge member and the shoulder member that prevent rotational movement of the shoulder member, thereby maintaining the shoulder member in the selected position.

Classes IPC  ?

• E21B 17/10 - Protecteurs contre l'usureDispositifs de centrage
• E21B 17/16 - Masses-tiges

Abrégé

An improved drive shaft for a motor having a central shaft, end housings, a ball and socket engagement to facilitate omni-directional movement between the central shaft and the end housings and drive keys to transmit torque between the central shaft and end housings with each end housing having planar drive key contact faces. The improvement lies in the drive keys, each of the drive keys having a shaft contact surface formed as a radius from a centre point and a planar housing contact surface longer than the drive key contact face of the end housing that the housing contact surface engages.

Classes IPC  ?

• E21B 4/00 - Moyens d'entraînement dans le trou de forage
• F16C 3/02 - ArbresManivelles
• F16D 3/221 - Joints universels dans lesquels la flexibilité est réalisée par pivots ou organes de liaisons coulissants ou roulants une des pièces d'accouplement pénétrant dans un manchon de l'autre pièce d'accouplement et reliée à celle-ci par des organes coulissants ou tournants les organes tournants étant des billes, des rouleaux ou des éléments analogues, guidés dans des gorges ou des logements dans chacune des parties de l'accouplement les organes tournants étants placés dans des logements ménagés dans une des pièces d'accouplement

Abrégé

A method of providing a consistent preload on thrust bearings in a bearing assembly. A first step involves placing against an inner race and an outer race of a bearing stack of thrust bearings, deformable shims made from a material having a relatively flat stress-strain curve after its yield stress has been exceeded. A second step involves preloading the deformable shims beyond their yield point in situ until a predetermined preload tolerance is reached.

Classes IPC  ?

• F16C 19/52 - Paliers à contact de roulement pour mouvement de rotation exclusivement avec dispositifs affectés par des conditions anormales ou indésirables
• F16C 27/08 - Paliers ou supports de paliers élastiques ou extensibles pour mouvement de rotation exclusivement pour charges axiales principalement, p. ex. pour arbres disposés verticalement
• F16C 39/02 - Allégement de la charge appliquée aux paliers par moyens mécaniques
• F16C 41/02 - Dispositions pour répartir également la charge sur plusieurs paliers ou sur les éléments de paliers

Abrégé

A rotary cutter assembly constructed in accordance with this method of securing a rotary cutter to a body has a cutter pocket with a first shoulder and a truncated second shoulder. A receptacle extends into the first shoulder. A first retainer retains a first axle end of the rotary cutter and engages the first shoulder to prevent axial movement in a first direction. A projection on the first retainer engages the receptacle to prevent removal of the first retainer radially from the cutter pocket. A second retainer retains a second axle end of the rotary cutter. The second retainer has a step down portion engaging the truncated second shoulder of the cutter pocket to prevent axial movement in a second direction. A locking ring overlies the truncated second shoulder and the step down portion of the second retainer to prevent removal of the second retainer radially from the cutter pocket.

Classes IPC  ?

• E21B 10/30 - Alésoirs à axe longitudinal à organes coupants roulants, p. ex. stabilisateurs d'alésoirs

Abrégé

A drive line for a down hole mud motor has a plurality of elongate keys extending radially from an exterior surface of a central shaft for the purpose of transmitting torque. A plurality of circumferentially spaced axial keyways are provided in an interior surface of each end housing, which are adapted to receive the keys. Each of the keys has opposed sides, opposed ends and a front face. The front face is radiused both in a first direction between the opposed ends and in a second direction between the opposed sides, thereby accommodating the omni-directional pivotal movement of the shaft relative to the housing. The use of keys for torque transmission increases available contact area, with a corresponding increase in torque load capacity.

Classes IPC  ?

• E21B 7/00 - Procédés ou matériels particuliers pour le forage
• F16D 3/221 - Joints universels dans lesquels la flexibilité est réalisée par pivots ou organes de liaisons coulissants ou roulants une des pièces d'accouplement pénétrant dans un manchon de l'autre pièce d'accouplement et reliée à celle-ci par des organes coulissants ou tournants les organes tournants étant des billes, des rouleaux ou des éléments analogues, guidés dans des gorges ou des logements dans chacune des parties de l'accouplement les organes tournants étants placés dans des logements ménagés dans une des pièces d'accouplement