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7383890 |
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...
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7363989 |
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 )...
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7156192 |
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 ir...
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6880649 |
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 ...
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6135215 |
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 d...
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6024166 |
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 as...
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5984025 |
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...
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5279373 |
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, wher...
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4624326 |
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...
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3881775 |
A method and apparatus for remote mining of a subterranean body of ore, through a bore hole, from a surface station. The apparatus includes an elongated rotatable member, an elongated powered cutting member pivotally attached near one en...
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3659364 |
Trench cutting apparatus particularly for cutting deep narrow trenches has a power-driven endless cutter chain on an elongated chain support which is linearly movable in a carrier mounted on a vehicle. In operation the carrier is vertica...
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3603010 |
A backhoe machine including a track laying or rubber tire tractor having a vertically adjustable boom (with the usual stick and bucket being removed) and having an endless bucket apparatus detachably secured intermediate its ends to the ...
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3550294 |
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3231310 |
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2890858 |
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2890532 |
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2817911 |
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2324956 |
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2292098 |
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2178554 |
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2178553 |
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1406351 |
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1406349 |
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