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| Number | Title | Issue Date |
| 7775099 | Downhole tool sensor system and method An apparatus and method for determining forces on a downhole drilling tool is provided. The downhole tool is provided with a drill collar operatively connectable to the drilling tool, and a sensor mounted about the drill collar. The sensor is adapted to measure defo... | 08/17/2010 |
| 7757552 | Downhole tool sensor system and method An apparatus and method for determining forces on a downhole drilling tool is provided. The downhole tool is provided with a drill collar operatively connectable to the drilling tool, and a sensor mounted about the drill collar. The sensor is adapted to measure defo... | 07/20/2010 |
| 7331469 | Vibratory separator with automatically adjustable beach A vibratory separator having a basket for supporting screen apparatus for treating material, the basket pivotably mounted on a base, vibratory apparatus connected to the basket for vibrating the basket, the material forming a pool on the screen apparatus, and a beac... | 02/19/2008 |
| 7278540 | Adjustable basket vibratory separator A vibratory separator having a base, a basket movably mounted on the base and for supporting screen apparatus for treating material introduced into the vibratory separator, the basket on a base and pivotable with respect thereto, vibratory apparatus connected to the... | 10/09/2007 |
| 7188058 | Method of load and failure prediction of downhole liners and wellbores A dynamic range relaxation algorithm is applied to simulate borehole failure under a variety of stress conditions. The borehole and its neighborhood are modeled by a number of regions by a plurality of interconnected nodes. The bonds between the nodes may be modeled... | 03/06/2007 |
| 7171851 | Temperature compensated strain measurement The present invention provides methods and apparatus for measuring subterranean strain. The methods and apparatus use fluid expansion principles to compensate for temperature variations and increase the accuracy of the strain measurements. The methods and apparatus ... | 02/06/2007 |
| 7158049 | Wireless communication circuit The invention includes a wireless communication circuit and a method of communicating with wireless signals that feature a tank circuit having an inductor connected in parallel with a capacitor circuit. The capacitor circuit includes a pair of capacitors coupled in ... | 01/02/2007 |
| 7100708 | Autodriller bit protection system and method A controller provides an automatic bit protection sequence for an autodriller that can be initiated during the initial stage of set down of the bit within the formation. The automatic protection sequence establishes a setpoint for a parameter of interest (such as we... | 09/05/2006 |
| 7051587 | Traction apparatus The present invention generally relates to a method and apparatus for performing an operation in a tubular. In one aspect, a method comprises positioning an apparatus in the tubular, the apparatus having a tractor portion and an auxiliary module. The method further ... | 05/30/2006 |
| 6976392 | Atomic clock for downhole applications A system and method for acquiring seismic data are disclosed. The system comprises a controller for causing the generation of a seismic signal, where the controller has a first clock used for time-stamping a record of the generated seismic signal. A seismic receiver... | 12/20/2005 |
| 6957580 | System and method for measurements of depth and velocity of instrumentation within a wellbore A survey tool for use in a wellbore includes a downhole portion having an axis. The downhole portion is adapted to move within the wellbore with the axis generally parallel to the wellbore. The survey tool further includes a first acceleration sensor mounted at a fi... | 10/25/2005 |
| 6926103 | Splittable block on a derrick The invention is a hoist system for a derrick with a derrick inside, a derrick outside, and a derrick top side; a splittable block connected to the derrick top side; a hoisting cable guided through the splittable block; a moveable trolley with a trolley top side and... | 08/09/2005 |
| 6837105 | Atomic clock for downhole applications A system and method for acquiring seismic data are disclosed. The system comprises a controller for causing the generation of a seismic signal, where the controller has a first clock used for time-stamping a record of the generated seismic signal. A seismic receiver... | 01/04/2005 |
| 6776035 | Method and device for calibration of dual-axis tilt meter The invention is directed toward a subsurface gravity measurement device and a method for calibrating the same that includes a tilt meter and a gravity sensor. The method includes associating tilt information produced by the gravity sensor as a function of a relatio... | 08/17/2004 |
| 6553825 | Torque swivel and method of using same A torque swivel apparatus. The apparatus includes an upper body assembly secured to the lower end of a locking swivel of the type used in wireline operations. The upper body would engage into a lower body, the lower body secured to the drill string at the... | 04/29/2003 |
| 6547016 | Apparatus for measuring weight and torque on drill bit operating in a well An apparatus for measuring the weight and torque on a drill bit operating down hole in a well. The apparatus comprises at least three pockets circumferentially spaced equidistantly around the drill collar of the drill string to which the drill bit is atta... | 04/15/2003 |
| 5833015 | Method and apparatus for sinking pipes or cables into a pilot borehole Method and apparatus for sinking pipes (8) or cables into a pilot borehole (4) by use of a drill string (3) including an expansion drill bit driven to rotate and pull is disclosed. The expansion drill bit is supplied with a wash fluid and is coupled with ... | 11/10/1998 |
| 5272925 | Motorized rotary swivel equipped with a dynamometric measuring unit A motorised rotary swivel for driving drill pipe in rotation is disclosed. The swivel includes a measuring unit for measuring a dynamometric behavior of the drill pipe which is mounted adjacent to the output of the motor between the motor and a torque wen... | 12/28/1993 |
| 5245871 | Process for controlling a drilling operation Method for conducting an oil drilling operation, during which a drill-stem produces the rotation of a tool in an oil well. The method consists of the following steps: continually measuring the rotational speed of the upper end of the drill-stem; continuou... | 09/21/1993 |
| 5205163 | Method and apparatus for determining the torque applied to a drillstring at the surface The invention relates to the determination of the torque Ts acting at the surface in a drillstring while drilling a borehole, the drillstring being rotated by rotating driving elements which include an electrical motor with an output shaft. The... | 04/27/1993 |
| 5109697 | Method of exploration for hydrocarbons A method of exploring for hydrocarbons is disclosed wherein core is obtained over substantially the entire length of a well and substantially all lithologies represented within the core are analyzed at a core analysis facility located adjacent the well. A... | 05/05/1992 |
| 5044198 | Method of predicting the torque and drag in directional wells A method is provided for generating an improved torque-drag model for at least the collar portion of the drill string in a directional oil or gas well. The techniques of the present invention determine the stiffness of incremental portions of the drill st... | 09/03/1991 |
| 5010765 | Method of monitoring core sampling during borehole drilling Downhole measurements are made for accurately determining whether or not a core barrel contains an appropriate amount of core sample before retrieval of the coring tool is attempted. This is accomplished by using a known apparatus for measuring downhole w... | 04/30/1991 |
| 4976143 | System and method for monitoring drill bit depth Methods and apparatus for accurately determining drill bit depth are provided. A hook load is sampled at a rate of at least 4 Hz and is compared to a low threshold to establish a slips-in condition. A determination is made retroactively that the drill str... | 12/11/1990 |
| 4972703 | Method of predicting the torque and drag in directional wells A method is provided for generating an improved torque-drag model for at least the collar portion of the drill string in a directional oil or gas well. The techniques of the present invention determine the stiffness of incremental portions of the drill st... | 11/27/1990 |
| 4848144 | Method of predicting the torque and drag in directional wells A method is provided for generating an improved torque-drag model for at least the collar portion of the drill string in a directional oil or gas well. The technique of the present invention determine the stiffness of incremental portions of the drill str... | 07/18/1989 |
| 4843875 | Procedure for measuring the rate of penetration of a drill bit The invention relates to a procedure for measuring the rate of penetration VF of a drill bit fixed to the lower end of a drill string lowered into a well. During an initial period, the well is drilled keeping, on average, the value of weight F ... | 07/04/1989 |
| 4807469 | Monitoring drilling mud circulation For monitoring drilling mud circulation there is incorporated in the supply mud a known amount or concentration of at least one tracer ion which is substantially non-interactive with the other mud components and with the strata drilled, and the return or ... | 02/28/1989 |
| 4756188 | Method and apparatus for compensating for drilling line stretch in determining equipment depth in a well and for measurement of hookload on the traveling block of a drilling rig An arrangement for measuring the stretch of a wire line used in well drilling operations by first measuring the amount of stretch in the deadline by measuring rotation of the dead sheave which supports the deadline, and multiplying the length of the wire ... | 07/12/1988 |
| 4748563 | Have invented certain new and useful improvements in method and apparatus for controlling the lift travel of a mast or derrick The invention relates to the automatic control of the lifting travel of a string of pipes suspended from a cable. To stop this string of pipes systematically in a specific position, a first passage check controlled by a sensor, for example sensitive to th... | 05/31/1988 |
| 4715451 | Measuring drillstem loading and behavior A drillstem loading and behavior measurement method and system includes spaced apart subs disposed at the upper end of the drillstem and connected to each other and to a power or conventional swivel and having strain gages and accelerometers mounted there... | 12/29/1987 |
| 4685329 | Assessment of drilling conditions In a method of assessing drilling conditions during a drilling operation measurements of torque applied (TOR), weight on bit (WOB), rate of penetration (ROP), and rotation speed (ROT) are gathered. Computed therefrom is a history (60, 61) of points (x, y)... | 08/11/1987 |
| 4557142 | Apparatus and method for real-time measurement of drilling fluid properties A system for real-time measurement of multiple properties of drilling fluids from a single sampling point may comprise: a pump for transferring fluids in the system, the suction of which may be alternately communicated through suction conduits with a rese... | 12/10/1985 |
| 4549431 | Measuring torque and hook load during drilling In a computer aided method of detecting problems in the drilling of a well, the hook load is measured while free rotating, while moving the string out of the well for an incremental distance, and while moving the drill string into the hole the same increm... | 10/29/1985 |
| 4548080 | Method and apparatus for soil mechanics measurements of filter cakes An apparatus includes a main housing with a permeable cylindrical sleeve in the main housing to simulate a rock formation through which a well is drilled. A compartment is defined outside the sleeve and a solids-containing fluid is introduced into the int... | 10/22/1985 |
| 4528842 | Method and apparatus for soil mechanics measurements of filter cakes A bore hole hydraulics simulator for drilling fluid has a pump for flowing the drilling fluid along a permeable partition which divides a first volume containing the drilling fluid from a second volume adapted to collect filtrate passing through the perme... | 07/16/1985 |
| 4512186 | Drill rate and gas monitoring system Method and apparatus for logging a well during drilling operations to record drilling fluid gas and rate of penetration as a function of depth. The system comprises elements for producing a succession of depth signals in response to applied inputs and app... | 04/23/1985 |
| 4510800 | Drilling mud testing system having a thermally isolated pump A system for testing drilling mud includes viscosity measuring tubes and other instruments for testing the parameters of drilling mud. The mud is heated to an elevated temperature and recirculates in a closed flow path which includes the measuring instrum... | 04/16/1985 |
| 4510801 | Controlled heater for drilling mud testing system Temperature control apparatus for a system for testing drilling mud includes instrumentation for measuring the parameters of the drilling mud, and a pump for pumping the drilling mud in a recirculating path through the instrumentation. A mud heater in the... | 04/16/1985 |
| 4501143 | Preparation unit for a drilling mud testing system In a system for testing drilling mud, a mixing tank and an aging vessel are hydraulically connected to supply drilling mud to a closed recirculating path through which mud is pumped to measuring instrumentation. The accumulator has a head which is removab... | 02/26/1985 |
