Abrégé

An apparatus including a rotating segment having a first radial surface, a non-rotating segment having a second radial surface, a housing disposed around the first and second radial surfaces, and one or more rolling elements disposed between and in contact with the first and second radial surfaces for transferring the non-rotating segment in an axial direction upon rotation of the rotating segment. The non-rotating element may be a second rotating element that rotates at a different rotational rate than the rotating element. Each rolling element moves 360 degrees along a circular path relative to the first radial surface and the second radial surface. The first or second radial surface has a tapered section. A downhole apparatus includes a power mandrel having a first end connected to a power section member and a second end having a rotating cam surface; a rotating element engaging the rotating cam surface; an anvil sub attached to a workstring, with the anvil sub having a stationary cam surface configured to engage with the rotating cam surface. Rotation of the rotating cam surface moves the anvil sub and the workstring axially within the wellbore.

Classes IPC  ?

• 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
• E21B 4/10 - Moyens de percussion mis en œuvre au fond du trou, p. ex. marteaux le mouvement de rotation continu dans une seule direction de l'arbre ou des tiges de forage produisant des chocs consécutifs

Abrégé

A mud motor bearing assembly for use in drilling a hydrocarbon well. The bearing assembly includes a bearing section containing stationary bearing rigs and rotating bearing rings in stacked arrangement. The bearing rings have wedge-shaped projections. The wedge-shaped projections of two adjacent stationary bearing rings form a recess to accommodate the projection of a rotating bearing ring in sliding engagement. The bearing assembly is capable of bearing both radial and axial loads.

Classes IPC  ?

• F16C 17/04 - Paliers à contact lisse pour mouvement de rotation exclusivement pour charges axiales uniquement
• F16C 27/04 - Roulements à billes ou à rouleaux, p. ex. à organes de roulement élastiques
• F16C 33/40 - Cages à billes pour rangées de billes multiples

Abrégé

A downhole apparatus connected to a workstring within a wellbore. The workstring is connected to a bit member. The apparatus includes a mandrel operatively connected to a downhole motor mechanism, an anvil member operatively formed on the bit member, the anvil member being operatively connected to the mandrel, a radial bearing housing unit operatively connected to the workstring, with the radial bearing housing unit being disposed about the mandrel, and a hammer member slidably attached to the radial bearing housing unit.

Classes IPC  ?

• E21B 7/20 - Enfoncement de tubages de revêtement ou de tubes dans les trous de forageForage et tubage simultanés des trous de forage

Abrégé

An apparatus for controlling the direction of drill bit within a wellbore. The apparatus comprises a first housing with a first housing axis therein, and wherein the first housing has a first threaded opening having a first threaded opening axis. The first housing has a helical end. A second housing is included, and the second housing contains a second housing axis, and a second threaded opening having a second threaded opening axis configured to engage with the first threaded opening. A collar is included that has a helical collar end that engages the helical collar end and wherein the helical collar end is configured reciprocal to the helical end, and rotational displacement of the first housing relative Io the collar will angularly displace the drill bit axis. The apparatus may further include spline members for locking the collar in place relative to the first and second housing.

Classes IPC  ?

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

Abrégé

Methods for manufacturing bearings and wear resistant surfaces usable in various downhole tools are described herein. A housing is provided. A laser configured for insertion into the housing, such as an inner diameter laser, is used to connect a fusible material to the inner surface of the housing or an insert disposed therein to form a hard facing layer on the inner surface. Simultaneously or independently, the laser can be used to connect the fusible material to the outer surface of a mandrel within the housing to form a second hard facing layer. The present methods thereby produce durable radial bearings having extended operational life, which can be produced within a bearing housing, or externally for transport and installation in existing bearing housings.

Classes IPC  ?

• F16C 33/14 - Procédés particuliers de fabricationRodage
• B21D 53/10 - Fabrication d'autres objets particuliers de parties de roulementsFabrication d'autres objets particuliers de manchonsFabrication d'autres objets particuliers de sièges de soupapes ou pièces similaires
• E21B 4/00 - Moyens d'entraînement dans le trou de forage

Abrégé

A process for manufacturing a bearing. The bearing may be used in a tool disposed within a bore hole. The process comprises providing a tubular sleeve and applying a hard facing material on the outer diameter of the tubular sleeve so that the hard facing material is fused onto the outer diameter, and thereafter applying a material layer on the outer diameter so that the material layer is fused onto the outer diameter. The method further includes machining the outer diameter so that a portion of the material layer is removed, and then machining the inner diameter so that only the hard facing material is left as an inner diameter. The method further includes machining the outer diameter and the inner diameter in order to form the bearing. In the most preferred embodiment, the method further includes placing the bearing into a housing, and inserting a mandrel into the bearing, and wherein a hard coating of the mandrel abuts the bearing. A mud motor for rotating a bit in a well bore is also disclosed.

Classes IPC  ?

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