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| Number | Title | Issue Date |
| 7172028 | Reciprocating slickline pump A reciprocating hydraulic slickline pump for use in a wellbore. The pump comprises a pump member. The pump member is reciprocated axially by slickline in order to form an upstroke and downstroke. The pump is configured such that it pressurizes fluid within a workstr... | 02/06/2007 |
| 7141942 | Digital device for correcting the image formed on the screen of a cathode ray tube Device for correcting the line and/or frame fields of a deflector for cathode ray tube comprising: a current sensor for evaluating the value of a line current Il a series of comparators intended to compare the value of the line current Il w... | 11/28/2006 |
| 6951262 | Method and apparatus for suppressing waves in a borehole Methods and apparatus for suppression of wave energy within a fluid-filled borehole using a low pressure acoustic barrier. In one embodiment, a flexible diaphragm type device is configured as an open bottomed tubular structure for disposition in a borehole to be fil... | 10/04/2005 |
| 5448281 | Print head pressure adjustment mechanism A printing pressure adjustment system and a method for adjusting the pressure applied by a print head against a backup member are disclosed. The adjustment system includes an elongated member that is slidably displaceable with respect to an outer surface ... | 09/05/1995 |
| 5373346 | Data gathering computer and analysis display computer interface system and methodology A data gathering computer and host data display computer interface system, methodology and protocol are described that utilize a shared control program. The data gathering computer uses this program to determine what measurements are to be made and when a... | 12/13/1994 |
| 5184692 | Retrievable radiation source carrier A retrievable radiation source carrier assembly for a logging while drilling tool is disclosed. The carrier includes a solid rod or member of high strength and low elastic modulus that connects the housings of at least two radiation sources. In a preferre... | 02/09/1993 |
| 5159499 | Logging cable magnetic remark apparatus A magnetic mark on a cable is subject to loss of intensity. The present disclosure provides for remarking. It utilizes a detector which responds to passage of a magnetic mark on the cable. A coil for remarking is located at a specified and measured distan... | 10/27/1992 |
| 5157392 | Telemetry network for downhole multistation seismic recording tools A seismic logging system for VSP or cross well data capture set forth. It is comprised of M duplicate recording stations connected serially below a main structure suspended on a logging cable. Each of the recording stations preferably includes orthogonall... | 10/20/1992 |
| 5103178 | Method using a pluraliyt of electrode, including a reference electrode, for recording a spontaneous potential curve in a borehole while drilling An apparatus and method for obtaining a spontaneous potential curve, which pparatus is comprised of: (a) an elongated body: (b) a series of vertically spaced electrodes for measuring electrical potential, wherein one of the electrodes is a reference electr... | 04/07/1992 |
| 5062084 | Borehole digital geophone tool A method and apparatus for acquiring acoustical data from a borehole and is especially useful in carrying out tomogrphy surveys. The borehole digital geophone (BDG) tool of the present invention is capable of operating from a standard, 7-conductor logging... | 10/29/1991 |
| 5038378 | Method and apparatus for smoothing measurements and detecting boundaries of features A method and apparatus are described for removing noise by smoothing fine resistivity measurements made with a tool from inside a borehole penetrating an earth formation. Pixel values representative of the resistivity measurements are examined to determin... | 08/06/1991 |
| 4747060 | Data acquisition module and method A data acquisition apparatus includes two microcomputers interconnected by a shared dual access digital storage device. One microcomputer obtains the data related to the monitored condition, stores it in the digital storage device, and modifies a status w... | 05/24/1988 |
| 4661932 | Dynamic downhole recorder A method and apparatus allows dynamic data to be recorded in a drill string for later playback at the surface. The system includes a transducer located in a sub in the drill string which provides electrical responses to a analog to digital converter. A ti... | 04/28/1987 |
| 4622635 | Portable display and control terminal for wells A portable terminal for plugging into a well production control system for displaying data from the control system and for entering data into the control system. A liquid crystal display module on the terminal displays both graphic and printed data. A key... | 11/11/1986 |
| 4607352 | Method and apparatus for obtaining a display of a characteristic of the periphery of a well The apparatus and method of the present invention pertain to visual presentation systems employing scan lines, wherein each scan line is divisible into sets of points respectively corresponding to locations at which well measurements are made. The resulti... | 08/19/1986 |
| 4594665 | Well production control system Apparatus for detecting fluid pound in a sucker-rod oil well, using values of sucker-rod position and of sucker-rod load to calculate a reference position and a selected load value. The apparatus continually updates the reference positions and selected lo... | 06/10/1986 |
| 4570234 | Oilfield monitor and recorder An oilfield monitor and recorder system providing marker positioning using a leadscrew, a stepper motor, a position sensor, driver and control. The control provides zero, span, slew and range functions. The rate input scaling provides calibration, percent... | 02/11/1986 |
| 4551730 | Method and apparatus for entering control points relative to a dynagraph of a well pumping unit Method and apparatus for entering control points relative to a dynagraph of a well pumping unit using the position of a beam and a pen holder of an XY plotter. The beam and/or the pen holder is physically moved to a desired location and an "enter" button ... | 11/05/1985 |
| 4542488 | Method and system for producing a PPI display A borehole logging tool employs an energy transmitter and receiver for scanning a borehole with energy pulses. An orientation pulse is produced each time the tool rotates past a predetermined orientation position. The time period between orientation pulse... | 09/17/1985 |
| 4538248 | Recording system for a borehole logging tool A borehole logging system includes a borehole logging tool, a logging tool depth encoder for indicating rate of movement of the logging tool, a moving recording medium, and a recording encoder for indicating the actual rate of movement of the recording me... | 08/27/1985 |
| 4483188 | Method and apparatus for recording and playback of dynagraphs for sucker-rod wells Method and apparatus for recording and subsequent playback of selected dynagraphs for wells employing sucker-rod pumping units to determine well faults which cause well shutdown. Calibration data from well monitoring equipment is stored in a first "endles... | 11/20/1984 |
| 4456983 | System and method for visual display of well logging data An improved well logging system and method is provided for deriving and visibly displaying a recordable representation of a comprehensive lithological profile of the earth materials traversed by a borehole. In a particular form of the invention, all loggi... | 06/26/1984 |
| 4428072 | Seismic well log display method and apparatus Apparatus and method for recording seismic signals on a logging chart as a function of the depth of a logging sonde within a well bore includes apparatus for analyzing the seismic signals. The method utilizes the recording of information relating to the s... | 01/24/1984 |
| 4387774 | Time recorder for in-hole motors Real time responsive devices are mounted at the inlet to an in-hole motor to measure the interval of time during which drilling fluid circulates through the motor.... | 06/14/1983 |
| 4367477 | Rate of penetration recorder An apparatus for measuring the rate of movement of one object with respect to another, such as a drilling rate recorder used to measure the rate of penetration of a drill bit during drilling operations. One embodiment of the invention includes a frame, a ... | 01/04/1983 |
| 4355378 | Logging system depth recorder A logging tool recording system counts and converts depth pulses into a digital coded format. Such digital coded format is converted to a serial digital word for recording on an analog recorder. During playback the digital serial word is converted back in... | 10/19/1982 |
| 4352166 | System and method for visual display of well-logging data A system and method for processing and displaying well-logging data provides direct indications of various lithological characteristics in conjunction with symbolic representatives of formation lithologies. Preselected programming of a two-dimensional sym... | 09/28/1982 |
| 4338664 | Method of evaluating formations traversed by a borehole A method which determines output parameters (such as porosity $c; or water saturation Sw of formations) from a set of logging measurements taken at each level of a borehole is proposed. Measurement and response equation uncertainties of each logg... | 07/06/1982 |
| 4307395 | Method of and apparatus for recording, storing and replaying dynamometer data from a liquid well pump A method and apparatus for accepting analog voltage signals from a reciprocating liquid well pump and digitizing the signals and storing the signals for playback at a later time. A receiving circuit accepts two analog signals, one of which is proportional... | 12/22/1981 |
| 4298572 | Mud logging system A system (10) for continuously analyzing drilling mud circulating through a borehole comprises a sampling chamber (12) through which flows the return mud, a sensor (16) mounted in the sampling chamber for detecting hydrogen gas percolating out of the dril... | 11/03/1981 |
| 4293934 | Circumferential acoustic device A method and apparatus for acoustical logging wherein a plurality of transducers are spaced circumferentially in a plane perpendicular to the borehole and in close proximity to the wall of the borehole. Numerous circumferential acoustic transmission paths... | 10/06/1981 |
| 4293309 | Method of obtaining and recording seismic and geochemical data A method is disclosed for determining the location of hydrocarbon reservoirs which comprises the steps of drilling boreholes along a linear path to a depth below the weathered zone, sampling the soil and drilling fluid found at the bottom of the boreholes... | 10/06/1981 |
| 4208966 | Methods and apparatus for selectively operating multi-charge well bore guns In the representative embodiments of the new and improved methods and apparatus disclosed herein for controlling multicharge perforating guns or core-sampling guns, the gun-control system of the present invention includes a selectively-operable multi-cont... | 06/24/1980 |
| 4208665 | Dynamometer for monitoring sucker rod strings A dynamometer for monitoring the tension in a pair of spaced, elongated members. A pen, actuated by a sensor means, measures the tension in the pair of spaced, elongated members, and places indicia upon a continuously moving chart. The indicia is related ... | 06/17/1980 |
| 4099410 | Rate of penetration recorder A latching control circuit for a rate of penetration recorder providing an output indication in response to the vertically downward movement of a drilling swivel a predetermined penetration distance.... | 07/11/1978 |
| 4043191 | Dynanometer for a pump-off control A dynamometer for measuring the tension in a pair of spaced, elongated members. The dynamometer includes a spring member having distal ends spaced from a medial portion, and a clamp means by which the distal ends are attachable to the elongated members to... | 08/23/1977 |
| 4020451 | Methods and apparatus for recording well logging measurements According to one embodiment, distinctive indicia having a "three-dimensional" appearance and representative of well logging data is produced by a CRT (Cathode-ray tube) recorder by modulating both the intensity and position of the sweeping electron beam i... | 04/26/1977 |
| 4010476 | Methods and apparatus for recording well logging measurements In accordance with illustrative embodiments of the present invention, data signals, particularly well logging data in analog or digital form, is recorded by a cathode ray tube recorder. A representation of the CRT beam is repetitively swept across a recor... | 03/01/1977 |
| 4001774 | Method of transmitting signals from a drill bit to the surface A system for performing wellbore telemetry operations wherein a communication link between a subsurface location in a well and the location substantially at the surface is established and maintained through electromagnetic coupling between two insulated e... | 01/04/1977 |
| 3986163 | Methods and apparatus for recording well logging measurements In accordance with illustrative embodiments of the present invention, well logging data in analog or digital form is recorded by a cathode ray tube recorder. A representation of the CRT beam is repetitively swept across a recording medium while being modu... | 10/12/1976 |
