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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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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....
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4338664 |
Method of evaluating formations traversed by a borehole
A method which determines output parameters (such as porosity φ or water saturation Sw of formations) from a set of logging measurements taken at each level of a borehole is proposed.Measurement ...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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4030064 |
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...
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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...
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3978588 |
Magnetic wire line marking, erasing and detecting method and apparatus
A method and apparatus for providing a signal when equipment being run into or out of a well on a magnetizable wire line reaches a previously visited point in the well below the surface. With the...
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3979714 |
Two-receiver, variable-density logging system
An acoustic velocity logging tool employs a transmitter and a pair of receivers. Acoustic pulses from the transmitter pass through the formation surrounding the borehole to the receivers. The...
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3967235 |
Acoustic velocity logging system
An acoustic velocity logging tool employs a transmitter and a pair of receivers. Acoustic pulses from the transmitter pass through the formation surrounding the borehole to the receivers. The...
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3916372 |
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...
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3842507 |
RECORDING INSTRUMENT FOR DETERMINING RATE OF PENETRATION IN A BOREHOLE
A measuring instrument for monitoring the rate of penetration of a borehole comprising a shaft having a drum thereon which is turned in proportion to movement of the drill string. The shaft has an...
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3839712 |
DIFFERENTIAL PRINT-OUT SHADING TECHNIQUE FOR DIGITAL SYSTEMS
One embodiment of the invention provides a circuit that switches the control of a graphical reproduction device between two input signals in order to produce a trace that shifts back and forth...
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3835953 |
ACOUSTIC CALIPER LOGGING
Acoustic pulses transmitted horizontally from a unit in a borehole are reflected at the borehole walls and the reflections are detected. Time functions representative of travel time of the...
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3823407 |
DEPTH PENETRATION DRILLING RECORDER
A recorder for monitoring the depth of penetration and downtime of a drill during drilling operations with respect to drilling time. The recorder includes a chart carried by a rotating drum...
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3781783 |
BOREHOLE LOGGING SYSTEM WITH IMPROVED DISPLAY AND RECORDING APPARATUS
Improved borehole logging apparatus for use with a borehole tool obtaining a transmitter for periodically generating an acoustic signal at varying depths within a borehole and a receiver spaced...
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3747060 |
SIGNAL GENERATING AND RECORDING APPARATUS WITH TIME DELAY
Two signal generators, such as sonic logging transmitters, are actuated sequentially by a circuit which includes an oscillator and a pulse generator. The delay between the actuations is established...
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3739888 |
APPARATUS FOR DRIVING A RECORDING INSTRUMENT
Mechanism for driving an odometer for logging footage drilled by an oil well drill or the like, and including a clutch driven by a measuring line, a shaft driven through the clutch, a sleeve...
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3714623 |
MEMORIZER
A system is disclosed for individually storing dc voltage values of an applied continuous voltage sampled at controlled intervals, extracting the dc voltage samples at predetermined intervals...
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3710448 |
RECORDING INCLINOMETER
A well bore inclinometer comprises an instrument mounted in a flow tube forming a part of a drill string. The instrument includes a record tape cartridge that is reciprocated each time the pump...
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3684872 |
MEANS AND METHOD FOR AUTOMATICALLY DETERMINING THE INTERFACE POSITIONS OF AN INJECTION FLUID IN A PETROLEUM OR GAS RESERVOIR USING AN ELECTROLYTIC MODEL OF THE RESERVOIR
An insulated grid, having four electrode probes at each intersection, overlays an analog model, using an electrolytic solution, of a petroleum or gas reservoir so that some or all of the probes are...
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3680042 |
METHODS AND APPARATUS FOR RECORDING WELL LOGGING DATA
In accordance with an illustrative embodiment of the present invention, a recording and displaying apparatus is adapted to record or display well logging signals derived from a well tool in a...
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3660649 |
APPARATUS AND METHOD FOR COMPUTING DRILLING COSTS
Apparatus and method for computing the cost per unit length of borehole drilled by a drilling apparatus, as for example, the cost per foot of borehole drilled. First signals representative of...
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