| Patent application number | Description | Published |
|---|
| 20090000825 | Power swivel incorporating removable/replaceable bearing core - A power swivel for rotation of tubulars, particularly in the drilling and servicing of oil and gas wells. The power swivel has a main body with a central cavity, and means for attaching the main body to the hoist mechanism (typically, the traveling block) of a drilling rig. A stem is rotatably disposed in the main body, with a threaded connection on its downward end, for connecting to the tubular string (drillstring). Vertical loads on the stem are transferred to a main thrust bearing which engages the stem. The vertical loads are then transferred to a removable bearing core contained within the main cavity of the main body. The removable bearing core permits relatively inexpensive and expeditious repair of the power swivel. | 01-01-2009 |
| 20090272231 | Tong Unit With Cage Plate Having Removable Window Section - A tong unit having a ring gear, an upper cage plate, and a jaw assembly is disclosed. The cage plate has a removable window section, through which the jaw assembly may be inserted into and removed from the central opening in the ring gear. The jaw assembly may be attached to the removable window section, so that the window section and the jaw assembly can be lifted out and inserted together. | 11-05-2009 |
| 20090272232 | Dumbell Roller Assembly for Tong Unit - A power tong having a ring gear and dumbell rollers, with mating load surfaces on the ring gear and dumbell rollers which transfer horizontal and vertical loads from the ring gear to the dumbell rollers, without contact between the ring gear teeth and the dumbell rollers. The power tong further has a dumbell roller shaft configuration which permits vertical and rotational locking of the shaft, while permitting easy replacement and without binding of the rotation of the top and bottom plates on the dumbell rollers. | 11-05-2009 |
| 20090272233 | Tong Unit Having Multi-Jaw Assembly Gripping System - A jaw assembly, namely a multi-jaw assembly (preferably three-jaw) for a tong unit. The jaw assembly has a rear jaw connected to two side jaws, by pivot pins, to form a multi-jaw jaw assembly. The pivot pins pass through the upper and lower cage plates on the tong unit; as such, the jaw assembly must move along with the cage plates. The rear jaw, with respect to the cage plates, is stationary. The side plates, by virtue of the pivot pins, are rotatably attached with respect to the cage plates. The rear jaw and side jaws carry dies, typically two dies on the rear jaw and one die on each of the side jaws, for gripping a tubular. The multi-jaw assembly permits efficient gripping of undersize and/or out-of-round tubulars, and application of torque thereto, without damage to the tubular. | 11-05-2009 |
| 20100278602 | ARTICULATING DRILL METHOD AND APPARATUS FOR CUTTIG OPENINGS IN NESTED STRINGS OF UNDERWATER PIPING AND/OR TUBING FOR OVERTURNED WELLS OR PLATFORMS - A method and apparatus for angularly drilling during a tapping procedure into a pressurized multiple strings of coaxially situated tubulars for wells and/or platforms which have overturned wherein the tapping occurs underwater via a diver or remotely operated vehicle. | 11-04-2010 |
