Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7383890 | Universal rig with vertical stand for tubulars The rig (10) is provided for electively inserting either coiled tubing or a threaded tubular through a rig floor and into a well. The rig includes a coiled tubing injector (16) supported on a mast (14) when in an operative position to insert coi... | 06/10/2008 |
| 7363989 | Device for a pulling tool for use in pipes and boreholes for the production of oil and gas A pulling tool for use in the placing of equipment and acquisition of data from pipes and boreholes used in the production of oil and gas. For this purpose the tool is constructed round a central, elongate, cylindrical main element (1) to which there are arra... | 04/29/2008 |
| 7156192 | Open hole tractor with tracks A downhole tractor is provided that may be used in open or cased wells, and is also designed for use in open holes having a variety of soil/formation consistencies (e.g., soft, firm, rigid, etc.), varying diameters and non-uniform and irregular bore profiles. The tr... | 01/02/2007 |
| 6880649 | Apparatus and method for directional drilling of holes An apparatus for the directional drilling of a bore hole through a solid substrate includes a main bore head mounted for rotation on a flexible drive shaft and a pilot bore head for weakening a region of substrate in advance of the main bore head, the weakened regio... | 04/19/2005 |
| 6135215 | Tool string apparatus for lateral borehole formation Apparatus for curving a vertical borehole laterally towards the horizontal by anchoring a diverter downhole in the bore-hole near the formation to be produced. A special cantaloupe shaped drilling mill is attached to the end of a rigid drill string to for... | 10/24/2000 |
| 6024166 | Apparatus for forming a slot in a wellbore A chain saw for cutting slots in a wellbore casing and the surrounding formation comprises a pair of cutting chain assemblies (37) rotatably mounted on a body and moveable from a storage position in which the axis of the cutting chain assemblies are paral... | 02/15/2000 |
| 5984025 | Drill pipe tong retaining apparatus Apparatus for positively retaining drill pipe tongs at a desired position horizontally displaced from a center of a rig floor. The apparatus includes a latch connected to a removable stand which places the latch at a desired height above the rig floor and... | 11/16/1999 |
| 5279373 | Controllable drill head Controllable drill head containing an elongated body of which one end is attached to a bore pipe and a spout element is mounted in a turnable manner on the other, foremost end of the body, in and opposite to an opening in this body, wherein the head conta... | 01/18/1994 |
| 4624326 | Process and apparatus for cutting rock A process is disclosed for cutting rock by means of discharging a medium under high pressure from a nozzle head at a fixed oscillating angle. A nozzle head on the end of the pressure hose is set in a freely pulsating movement through the discharge of a me... | 11/25/1986 |
