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5433279 |
The assembly is designed to convert a conventional land rig to "top drive". It comprises a torque track that is shipped in sections and is assembled to form a rigid track extending vertically in the derrick. The track is rigidly attached...
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5390747 |
A well rig lifting system and a hydraulic energy-storing well rig lifting system, wherein a high pressure energy-storing cylinder and a composite cylinder or cylinder group are used to carry out the lifting and lowering operations. Durin...
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5348104 |
A well assembly including a drive string, a frame, a spindle mounted on the frame and means for rotating the spindle, is constructed to allow the upper end of the string to pass through the spindle. A nut with a non-circular downward pro...
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4924950 |
A method of drilling a well by utilizing AE/MA measurement which has the steps of monitoring an AE wave emitted at the periphery of the well, and drilling the well without lost circulation by providing lost circulation preventing means i...
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4730254 |
A system and apparatus for the monitoring and control of torque applied during make-up and breakout of drill string components. The force applied by the cat head to the tong is measured by a hydraulic load cell and the horizontal and ver...
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4607694 |
A method is described for testing the quality of cement slurry installed in a borehole to form a plug. The density of the cement, when relatively pure, is compared with the density after the slurry has been placed in situ and has been ex...
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4375241 |
This invention concerns a drilling installation comprising a base which rests on the ground, a rig, a winch, items of equipment such as a drill-pipe storage coffer, and a working floor which is raised above the base, surrounding the rig....
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4341270 |
Improved means for suspending a drill string using a pair of hydraulically actuated belts is disclosed. A derrick or tower is mounted to a base to overlie a standard rotary drill table. The drill string (comprising a number of drill pipe...
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4305237 |
A sectionalized drilling mast, power arrangement and support means therefor includes base means to support the drilling mast means when reclined and when erect. Drawworks trailer ramp means are secured substantially at right angles to sa...
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4137974 |
A vertical drill rig is provided with a hydraulic crowd mechanism for crowding down a drive kelly having a rotating drilling tool supported from the lower end thereof.The crowd mechanism includes a drum having first and second cables wou...
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4135340 |
A system for erecting elevated floors where a first support floor with a drawworks thereon is connected to one end of a base structure by two pair of parallel spaced pivotable links and a second support floor is coupled to the opposite e...
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4064950 |
A hydraulic drilling machine for cutting into rock formations and the like. The machine has a rotating drill rod with a bit at one end and a rotary hydraulic drive motor at the other end. The drill rod is supported on a carriage adapted ...
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4024924 |
An improved portable drilling rig for drilling deep boreholes in the earth, in which the table or working floor of the rig, on which the rotary table and draw works are supported, is on a separate framework supported on and attached to a...
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4009544 |
An improved portable drilling rig for drilling deep boreholes in the earth, in which the mast is rotatable to a horizontal position at a small distance above the ground. The mast is of rectangular construction, with four corner columns, ...
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3986564 |
An improved, multipurpose oil well rig employing hydraulically actuable components. Two, three, or four or more piston cylinder fluid motors are provided in the rig lift system, powered either by a power unit having high pressure, low vo...
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3942593 |
There is disclosed herein a mobile well drilling rig apparatus adapted for rapid assembly and disassembly thereof. The drilling rigs of the invention comprise a trailerable telescoping mast assembly and a separate sectionable substructur...
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3922825 |
A system for quickly and easily erecting or disassembling an oil well derrick. A stationary base is positioned at the well site. A movable base is connected to the stationary base by a multiplicity of struts. The struts are connected to ...
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3830315 |
Apparatus for locating a helical screw anchor in the earth comprising, a pointed helical screw anchor having an interrupted helical blade thereon terminating at a heel on the upper end of the blade, and further having an elongated shank ...
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3807109 |
Parallel reclining front and back links have their front ends pivotally connected to a base and their rear ends pivotally connected to an elevatable floor support member on which a gin pole is mounted. Pivotally connected to the base in ...
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3805463 |
A blast hole drill mast is pivotal between a horizontal position and an upright drilling position. Back bracing for the mast includes a pair of struts each of which extends from the drill frame to a point high on the mast and each of whi...
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3802137 |
A portable well rig for mounting on offshore platforms including a telescoping mast mountable on a base which also has the engine and drawworks mounted thereon, a drain pan and splash guard on the base, a pair of longitudinally extending...
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3796272 |
A base structure is provided with a gin pole structure, a mast pivotally mounted in front of and adjacent the gin pole structure, a pipe setback structure mounted in front of and adjacent the mast on the base structure and independent of...
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3749183 |
A base structure having front and rear ends is provided with an elevatable drawworks support, a gin pole structure, a mast mounted in front of the gin pole structure, and a pipe setback structure mounted in front of the mast on the base ...
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3747695 |
A framework type mast structure is pivotally mounted on a base structure. A self-supporting pedestal structure including a gin pole structure which is pivotally mounted on the base structure adjacent the mast structure. The pedestal stru...
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3746105 |
An improved arm extension is provided which is mounted at one end to a carrier or the like, and which is capable of supporting an auger or other boring device at the other end. The arm extension is composed of one or more tubular section...
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3734204 |
In accordance with an illustrative embodiment of the present invention, a drilling attachment for use in conjunction with a crawler or a truck mounted crane includes a frame assembly pivoted at one end to the crane at the base of the boo...
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3716106 |
A drilling system for rotary drilling. A drilling system for the rotary drilling of well bores utilizing a pair of cooperating subsystems, one subsystem providing for control of the penetration rate or weight of the drill bit, the second...
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3669196 |
A drilling apparatus for exploratory oil and gas drilling is provided, such apparatus having a derrick comprising a plurality of component parts for assembly on site. Components of the derrick are hingedly connected for ease and convenie...
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3515229 |
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3504749 |
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RE18947 |
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RE09660 |
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RE08390 |
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1312565 |
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1286805 |
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1238388 |
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1189739 |
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1188765 |
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1176041 |
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1170015 |
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1150180 |
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1139176 |
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1124826 |
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1117806 |
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1108102 |
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1104409 |
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1073821 |
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1035428 |
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1032936 |
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1027199 |
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