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7392859 |
An expandable gripper assembly may be configured for anchoring a tool in a passage. The expandable gripper assembly includes first, second, and third pivotally connected links that are coupled to a tool. The third link is adapted to enga...
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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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7353886 |
A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-posit...
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7343982 |
A hydraulically powered tractor adapted for advancement through a borehole including an elongate body, aft and forward gripper assemblies, and a valve control assembly housed within the elongate body. The aft and forward gripper assembli...
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7322430 |
A method of reducing the torque required to provide relative rotation of two connected members includes providing impacts at or adjacent the connection between the two members at a rate of at least two impacts per second. An apparatus fo...
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7264066 |
The invention relates to a drilling apparatus and a method for introducing a drilling element into the soil comprising a drive, which is supported on a mast for introducing the drilling element, and a collet turning device having a colle...
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7188681 |
A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-posit...
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7185716 |
A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assemb...
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7174974 |
A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assemb...
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7159673 |
A drilling system and method for drilling a borehole into an earth formation is provided. The drilling system has a drill string having a lower section provided with a sleeve which is radially expandable from a retracted mode in which th...
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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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7121364 |
A hydraulically powered tractor adapted for advancement through a borehole including an elongate body, aft and forward gripper assemblies, and a valve control assembly housed within the elongate body. The aft and forward gripper assembli...
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7080701 |
A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assemb...
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7080700 |
A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-posit...
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7073610 |
A downhole tool for generating a longitudinal mechanical load. In one embodiment, a downhole hammer is disclosed which is activated by applying a load on the hammer and supplying pressurizing fluid to the hammer. The hammer includes a sh...
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6938708 |
A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assemb...
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6845825 |
A control system for a drilling machine is disclosed. The drilling machine includes a rod driver for driving a string of rods into the ground, and for removing the string of rods from the ground. The drilling machine also includes a maga...
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6761231 |
A percussive tool adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment the percussive tool has a hydraulic pump, driven by a drive member, to operate the hammer assembly. In ...
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6745854 |
A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assemb...
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6743029 |
The invention here disclosed is a back wire ground clamp for a wiring device such as a switch or receptacle having a ground strap which supports an outwardly projecting ground lug having a front edge and adapted to receive a ground conne...
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6736223 |
A thrust absorber is interposed between a thruster and an anchor that cooperate to axially displace another member. The thrust absorber includes an enclosure fixed to the anchor and a retainer connected to the thruster. A biasing member ...
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6679341 |
A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-posit...
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6478097 |
A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assemb...
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6467557 |
A long reach rotary drilling assembly comprises an elongated conduit extending through a bore in an underground formation, a drill bit for being rotated to drill the bore, a 3-D steering tool on the conduit for steering the drill bit, an...
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6427786 |
A tractor for moving within a borehole comprises an elongated tractor body and two propulsion assemblies that are longitudinally movably engaged with the body. The tractor body has annular pistons configured to receive hydraulic thrust t...
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6347674 |
A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assemb...
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6297966 |
A memory module assembly in accordance with the present invention comprises a memory module, such as a RAM module, and a pair of shells for enclosing the RAM module. The RAM module comprises a printed circuit board (PCB), a plurality of ...
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6286613 |
A point-contact impact method used in the Standard Penetration Test (SPT) is disclosed. The method aims firstly to have the impact between the drop hammer and the anvil in the form of point contact and secondly to center the impact conta...
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6241031 |
A tractor for moving within a borehole comprises an elongated tractor body and two propulsion assemblies that are longitudinally movably engaged with the body. The tractor body has annular pistons configured to receive hydraulic thrust t...
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6233158 |
Methods and apparatuses for installing and grounding a motherboard in a chassis of a computer. In one embodiment of the invention, a computer chassis includes a movable cover plate having a grounding contact. The cover plate is releasabl...
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6196333 |
A hydrostatic penetration device for placing on and penetration of the seabed comprises a housing (1) with a top cover (2) and a bottom cover (3), and a through-going vertical tool (4) for penetration of the seabed. The hydrostatic penet...
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5758731 |
A tether puller for advancing a tether through a channel may include a bellows assembly having a leading end fixedly attached to the tether at a first position and a trailing end fixedly attached to the tether at a second position so tha...
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5752572 |
The invention provides a tractor for locomoting a drilling apparatus. The tractor includes a retractable body for transporting and pressurizing a drill attached to a front drilling end of the retractable body. The retractable body is lon...
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5704427 |
The present invention provides a device for removing well casing from plugged and abandoned oil wells. The invention includes a unitary platform structure sufficiently small that the structure may be transported by boat to offshore well ...
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5449047 |
A blasthole drill is provided with sensors for sensing the pressure (AP) applied to and through a drill bit to convey cuttings from the drill hole, the rate of rotation (N) of the drill bit, the torque (RT) required to rotate the bit, th...
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4751971 |
A mobile automatic augering device, capable of augering a hole, entrapping a volume of earth removed from the hole to create a work space above the hole, and then backfilling the hole with the removed earth is disclosed. The present inve...
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4520880 |
This invention relates to an automatic stone cutter having a construction in which a base can slide on right and left rails, a cylinder main body having a drill is mounted to the base so as to be capable of elevating in the longitudinal ...
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4503918 |
A rock drilling apparatus for drilling with high pressure hydraulic jet including a rock drill body (11), a drill tool (12) coupled to said body (11) and a feeding device (15) with a motor (16) for feeding said body and tool to and fro t...
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4066137 |
A flame jet lance having a rotatable drill bit for forming cross holes in the ground is disclosed. The lance has various fuel and oxidizer tanks disposed therein and a fuel feed system coupled to the tanks for pumping the fuel to the rot...
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4043407 |
Equipment for drilling and obtaining samples from, and/or testing at, locations where the soil being investigated is unstable, or where access to the equipment is difficult during drilling, for example underwater. Samples can be obtained...
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RE28127 |
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3593809 |
A device having an auger shaft connected to a frame. A motor platform is mounted on the threaded shaft and moves therewith while supporting a finger-shaped soil-sampling receptacle embracing the auger portion of the auger shaft. The soil...
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3406765 |
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3314725 |
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3224512 |
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3169588 |
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2985249 |
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2701121 |
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2646252 |
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2458241 |
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