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Match Document Document Title
9041547 System and method for stick-slip correction  
A method of processing downhole measurement data includes: receiving formation measurement data generated by a downhole tool during a logging-while drilling operation over a selected time period;...
9000940 Drill string inground isolator in an MWD system and associated method  
An inground isolator and associated method can provide an electrically isolated break in a drill string using electrical insulating members/isolators that are supported by a housing. During drill...
8775085 Distributed sensors for dynamics modeling  
An apparatus for estimating at least one of a dynamic motion of a portion of interest of a drill string and a static parameter associated with the portion of interest, the apparatus having: a...
7991554 Method for predicting rate of penetration using bit-specific coefficients of sliding friction and mechanical efficiency as a function of confined compressive strength  
A method for predicting the rate of penetration (ROP) of a drill bit drilling a well bore through intervals of rock of a subterranean formation is provided based on determined relationships...
7412331 Method for predicting rate of penetration using bit-specific coefficient of sliding friction and mechanical efficiency as a function of confined compressive strength  
A method for predicting the rate of penetration (ROP) of a drill bit drilling a well bore through intervals of rock of a subterranean formation is provided. The method uses an equation based upon...
6363780 Method and system for detecting the longitudinal displacement of a drill bit  
The present invention is a system and method for generating an alarm relative to effective longitudinal behavior of a drill bit fastened to the end of a drill string driven in rotation in a well...
5844132 Method and system for real-time estimation of at least one parameter linked with the behavior of a downhole tool  
The present invention relates to a system and to a method designed to estimate the effective behaviour of a drill bit fastened to the end of a drill string and driven into rotation in a well by...
5794720 Method of assaying downhole occurrences and conditions  
A method of assaying work of an earth boring bit of a given size and design comprises the steps of drilling a hole with the bit from an initial point to a terminal point and recording the distance...
5581024 Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements  
The current invention is directed toward the use of a downhole computer and downhole storage within a measurement-while-drilling (MWD) downhole subassembly to process data from the response of a...
5398546 Determination of drill bit rate of penetration from surface measurements  
A method of determining, from surface measurements, the rate of penetration Δd of a drill bit attached to a drill string suspended from a floating drilling rig by means of a suspension system and...
5321982 Method for measuring the rate of penetration of an equipment progressing in a well  
The method comprises using a transmitting unit and at least two receiving units (8,10) arranged in two different places along well equipment (2). Each receiving unit forms an image or signature of...
5274552 Drill string motion detection for bit depth calculation  
A motion detector is incorporated on a drilling rig for detection of drill string motion. An output of the motion detector provides an enabling signal for conversion of block height data to bit...
4961343 Method for determining permeability in hydrocarbon wells  
During oil and gas well drilling operations, at the wellsite surface the percentage by volume of hydrocarbon gas present in the return drilling fluid is monitored in order to determine the...
4845628 Method for optimization of drilling costs  
Disclosed is a real-time method for minimizing the expected, controllable unit cost over a future drilling interval by simulating the values of selected operating variables and lithologies.
4794535 Method for determining economic drill bit utilization  
Disclosed is a real-time method for determining when a drill bit that is being used in drilling operations should be replaced, given the objective of minimizing the total expected, controllable...
4747303 Method determining formation dip  
The inclination and slope of a bedding plane are determined from oriented measurements of the bending moment generated as a bit encounters and passes completely through the interface between two...
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...
4627276 Method for measuring bit wear during drilling  
A method for measuring the wear of milled tooth bits during oilwell drilling uses surface and subsurface wellsite sensors to determine averaged values of penetration rate, rotation speed and MWD...
4419886 Rate of penetration sensor for oil drilling rigs  
Apparatus for indicating the change in position of a travelling block coupled to a wire line which is wrapped around a drum, comprising a motion pickup device responsive to the drum for providing...
4389885 Signal generator for a penetration rate measuring apparatus  
To measure the penetration rate of a drill string, a signal generator includes a friction wheel that can be engaged with the side of a drum upon which is wrapped a cable used to lower the drill...
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...
4138886 Method and apparatus to measure the rate of advance of a drilling tool on a floating drilling installation  
The disclosure relates to measurement of the rate of advance of a drill bit from a floating drilling installation. The process includes joining a point of the drilling system, fixed in translation...
4085509 Apparatus for compensating for the heaving of a floating drilling platform for connection with apparatus for measuring the rate of penetration of pipe run into an offshore well  
Apparatus adapted to compensate for the heaving of a floating offshore drilling platform, which heaves relative to the ocean bottom due to wave action of the water in which the platform is...
4064749 Method and system for determining formation porosity  
A method and/or system for measuring formation porosity from drilling response. It involves measuring a number of drilling parameters and includes determination of tooth dullness as well as...
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...
3750480 PNEUMATIC MEASUREMENT APPARATUS  
A pneumatic apparatus and method for measuring a function. Pneumatic pulses representative of the function are generated, integrated and monitored as an indication of the function. The integrated...
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...
3504370 APPARATUS FOR MEASURING AND RECORDING THE DEPTH AND PENETRATION SPEED OF A DRILLING BIT  
3420099 APPARATUS FOR AND METHOD OF LOGGING EARTH FORMATIONS  
3386286 Hydrocarbon well logging  
3379052 Soil penetrometer  
3364494 Drilling system recorder  
3220251 Drilling rate recorder  
3214762 Pneumatic penetration recorder  
3185997 Pipe collar locator  
3159448 Recording apparatus for use with well drilling equipment  
3154367 Drilling rate recording  
3129997 Well depth recorder and associated pen return  
3117445 Time recorder and comparator for drilling operations  
3017770 Drilling rate recorder  
3013856 Swab penetration recorder  
3010777 Recorder with selective five foot marker  
3009355 Drilling rate recorder  
3005525 Recording apparatus clutch for earth bore drilling equipment  
2981102 Well depth recorder  
2980486 Recorder  
2974523 Depth and operation recorder for earth bore drilling rigs  
2957346 Drilling rate measuring apparatus  
2935871 Well logging apparatus  
2932190 Tension apparatus for a cable used with recording apparatus for earth bore drilling  

Matches 1 - 50 out of 58 1 2 >