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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5237863 |
Method for detecting pump-off of a rod pumped well
A method for monitoring a rod pumped well and detecting when the well is pumped off. The method utilizes the measured rod load and position for each stroke to set load limits and position limits....
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5205163 |
Method and apparatus for determining the torque applied to a drillstring at the surface
The invention relates to the determination of the torque T s acting at the surface in a drillstring while drilling a borehole, the drillstring being rotated by rotating driving elements which...
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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...
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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...
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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...
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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...
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4843875 |
Procedure for measuring the rate of penetration of a drill bit
The invention relates to a procedure for measuring the rate of penetration V F of a drill bit fixed to the lower end of a drill string lowered into a well. During an initial period, the well is...
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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...
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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...
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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...
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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...
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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....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4476715 |
Mud metering tank monitoring system
The present disclosure is directed to a mud metering tank monitoring system for use with an oil well drilling derrick having a sheave on the crown block and a bottom pulley forming a block and...
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4458528 |
Stickometer
An improved instrument for measuring the relative "stickiness" of a drilling mud under well drilling condition is disclosed. It features a filtration member comprised of the material of the...
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4413511 |
System for measuring cuttings and mud carryover during the drilling of a subterranean well
This invention discloses a method and system for continuously measuring the amount of solid cuttings picked up by a drilling mud being circulated in a well being drilled into subterranean...
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4408486 |
Bell nipple densitometer method and apparatus
A method and apparatus for continuously determining the amount of entrained gasses and drilling fluid before the entrained gas is released to the atmosphere whereby differential pressures at...
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4385666 |
Method of maintaining preset parameters of drilling mud
A method of maintaining preset parameters of a drilling mud delivered into a well in the process of drilling in which a value of the oxidation-reduction potential (redox potential) of the drilling...
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4370885 |
Method for controlling the dispersing of solids in drilling mud
A method for controlling the dispersing of solids in drilling mud, consisting in that mud mineralization value is measured continuously until it stabilizes itself in the course of the dispersing,...
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4369655 |
Method of determining the concentration of solid lubricants in drilling fluids
A method of determining the concentration of spherical solids used as lubricants in drilling fluids in which the solid lubricant together with other solids of a given particle size are separated...
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4341115 |
Method and apparatus for monitoring structural and mechanical properties of drilling mud
A method of monitoring structural and mechanical properties of drilling mud and a device for realizing this method includes the determination of the viscosity of drilling mud via a viscosimeter and...
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4339946 |
Hydraulic depth indicator for hydraulic drilling machines
A hydraulically operated earth boring machine, improved with a flowmeter and indicator to show the instantaneous and the greatest depth of the drilling tool.
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4295366 |
Drilling fluid circulating and monitoring system and method
A drilling fluid monitoring system and method includes a pump stroke counter providing an electrical signal representing the volume of drilling fluid pumped into a well, a flow sensing device...
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4285236 |
Rotary torque and rpm indicator for oil well drilling rigs
Monitoring the torque applied by the rotary table to the drill string and the RPM of the drill string is provided. An intermediate adapter is positioned between the drill Kelly and the rotary...
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4250758 |
Combination for use in a rotary drilling system with torque meter
A system applicable to rotary drilling. It includes a torque meter that measures dynamic torque while drilling. The system averages the time period of individual oscillations in the torque, for a...
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4202490 |
Drill pipe identification method and system
Numbers in binary form comprising apertures filled with non-magnetic material are formed in the outer periphery of drill pipe sections for identification purposes. The numbers are read by a sensor...
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4201082 |
Process and equipment for determining the density of a loaded drilling fluid from a deep well, in particular an oil well
Process and apparatus for determining the density of oil well drilling fluid, particularly, the gas content of the fluid. The density of the drilling fluid is determined under a known pressure. The...
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4030558 |
Wear determination of drilling bits
A method for determining the amount and character of rotary drilling bit wear without interruption of the drilling operation. The method comprises flowing a drilling fluid through the borehole and...
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3982432 |
Well monitoring and analyzing system
Described is a system for automatically recording information about the physical condition, content and location of earth formations penetrated during drilling of a well, the rate of drilling the...
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3931735 |
Methods and apparatus for measuring the rate of penetration in well drilling from floating platforms
New and improved methods and apparatus exemplifying the present invention are disclosed herein for measuring the changes in total elongation of a drill string due to variations in the tensional...
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3921447 |
Drilling force indicator
A drilling system is disclosed that adds the hydraulic forces acting on the piston of a hydraulic cylinder to the weight of the drill stem and bit for visual display indicative of the total force...
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3916684 |
Method and apparatus for developing a surface well-drilling log
Method or system for developing a surface drilling log indicative of one or more parameters of the formation being drilled. Measurements include the bit revolutions, the depth of the bit in the...
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3911741 |
Pneumatic fluid weighing device
An apparatus for weighing drilling fluid being pumped into a well and for weighing the drilling fluid returning from the well during drilling operations. A pair of pneumatic conduits are connected...
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3898880 |
Electronic supervisory monitoring method for drilling wells
An electronic supervisory control system is disclosed herein wherein rotary power, rotary speed, bit weight, hole size, penetration rate and mud weight ratio are utilized in conjunction with analog...
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