Abstract:
Downhole tools for use in downhole operations and electrical submersible pumping systems having an additively manufactured first part including a first layer having a first predetermined material property and a second layer having a second predetermined material property, wherein the first and second layers are layers of an integral piece and the first predetermined material property is different from the second predetermined material property and a second part configured to rotationally engage with the additively manufactured first part. One of the first part and the second part is rotated relative to the other of the first part and the second part in operation.
Abstract:
The present disclosure relates to roller cone drill bit journals with asymmetric ball races and extended friction races. The disclosure also relates to methods of forming such journals, and methods of finishing these journals to produce finished journals with symmetric ball races.
Abstract:
A driveshaft transmission assembly may include a catch assembly. The catch assembly may prevent the loss of certain driveshaft transmission assembly components downhole in the event of a failure of the driveshaft transmission due to dynamic loads produced during operation of a drilling system. The catch assembly may be coupled to a first radial bearing assembly using locking devices. The driveshaft transmission assembly may also include a second radial bearing assembly interlockably coupled to a thrust bearing and a bearing housing.
Abstract:
Embodiments disclosed herein relate to bearing apparatuses including a bearing assembly having a continuous superhard bearing element including a continuous superhard bearing surface and a tilting pad bearing assembly. The disclosed bearing apparatuses may be employed in pumps, turbines or other mechanical systems. In an embodiment, the bearing apparatus includes a first and second bearing assembly. The first bearing assembly includes a first support ring and a plurality of tilting pads. Each tilting pad is tilted and/or tiltably secured relative to the first support ring. The second bearing assembly includes a continuous superhard bearing element. The continuous superhard bearing element includes a continuous superhard bearing surface facing the plurality of tilting pads and exhibits a maximum lateral width greater than about 2 inches.
Abstract:
Antriebswelle (6) für eine Werkzeugmaschine (1), beispielsweise eine Kernbohrmaschine, verbindbar mit einem Bohrwerkzeug (2), insbesondere einer Bohrkrone, enthaltend einen sich im Wesentlichen über die gesamte Länge der Antriebswelle und entlang der Rotationsachse (M) erstreckenden Hohlraum (11), wobei der Hohlraum wenigstens eine Zuflußöffnung enthält, durch die Wasser entlang der Antriebswelle in das Bohrwerkzeug zuführbar ist. In der Antriebswelle ist eine Einsatzvorrichtung (14) in dem Hohlraum vorgesehen, durch die das Wasser zum Kühlen der Antriebswelle zuerst in eine erste Richtung (A) und anschließend in eine zweite Richtung (B) geführt wird, wobei das Wasser wenigstens in der ersten Richtung direkten Kontakt mit der Innenseite (6c) des Hohlraums hat.
Abstract:
Die Erfindung betrifft Schneidrollen, die auf rotierenden Werkzeugträgern, wie einem Bohrkopf oder einem Schneidrad von Tunnelvortriebsmaschinen oder vergleichbaren Bohrgeräten zum Lösen von Baugrund verwendbar sind und die einen gelagerten Schneidrollengrundkörper mit einem oder mehreren wechselbaren oder nicht wechselbaren Schneiden oder Schneidringen umfassen. In diese Schneidrollen integriert sind Radiallager zur Aufnahme von in radialer Richtung wirkenden Kräften und Axiallager, die in axialer Richtung wirkende Kräfte aufnehmen, wobei alle Axiallager in axialer Richtung außerhalb der Radiallager bzw. des Radiallagers angeordnet sind.
Abstract:
An apparatus including a housing, a shaft rotatably extending through the housing, and a rotary seal assembly contained within the housing for providing a seal between the housing and the shaft. The shaft is capable of an amount of tilting within the housing about a tilting focal point which is axially located along the housing at an axial focal point position. The rotary seal assembly is axially located along the housing at an axial rotary seal position. The axial rotary seal position is substantially axially coincident with the axial focal point position.
Abstract:
Embodiments of the invention are directed to compact bearing assemblies configured to operate in small spaces and/or in harsh environments, bearing apparatuses including such bearing assemblies, and method of operating such bearing assemblies and apparatuses. For instance, one or more compact bearing assemblies may at least partially rotatably secure a shaft of a power generation unit to a housing thereof. Also, a first compact bearing assembly (100) may connect or couple to the shaft and may rotatably engage a second compact bearing assembly (200), which may be connected or otherwise secured to the housing.
Abstract:
A disc cutter for use on a tunnel boring machine (10) may include a shaft and a cutter assembly (213) rotatably mounted on the shaft (202). The cutter assembly may include a cutter ring (206) extending circumferentially about a central axis (230) and one or more bearing apparatuses (212A, 212B) rotatably mounting the cutter assembly to the shaft. Each bearing apparatuses may include a rotor (226) extending circumferentially about the central axis and a first plurality of superhard bearing elements (248) distributed circumferentially about the central axis. Each first superhard bearing element may be attached to the rotor and may include a bearing surface (254). The bearing apparatuses may further include a stator (224) extending circumferentially about the central axis and a second plurality of superhard bearing elements (234) attached to the stator that are generally opposed to the first plurality of superhard bearing elements of the rotor.
Abstract:
According to one embodiment, the disclosure relates to a roller cone drill bit including a bit body having at least one support arm extending therefrom, a cone assembly containing bearings or retaining balls and rotatably mounted on a journal extending from each support arm, a lubricant reservoir disposed in each support arm, a lubricant chamber disposed in each support arm and fluidly coupled to the bearings or retaining balls, a bore disposed in each support arm to communicate lubricant between the lubricant reservoir and the lubricant chamber, and a pressure release mechanism disposed within the bore. The pressure release mechanism may be operable to relieve lubricant from the lubricant reservoir into the lubricant chamber when lubricant pressure within the lubricant reservoir exceeds pressure of the lubricant in the lubricant chamber. According to another embodiment, the disclosure relates to methods of relieving lubricant in such a bit.