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7475593 |
High temperature near infrared for measurements and telemetry in well boreholes
A borehole logging system for the measure and the telemetry of properties and conditions of a well borehole environs. The system is embodied to measure fluids within the borehole, to measure high...
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7367411 |
Drilling system and method
A closed-loop circulating system for drilling wells has control of the flow rates in and out of the wellbore. Kicks and fluid losses are quickly controlled by adjusting the backpressure. Kick...
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7222681 |
Programming method for controlling a downhole steering tool
A method for communicating with a downhole tool located in a subterranean borehole is disclosed. Exemplary embodiments of the method include encoding data and/or commands in a sequence of varying...
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7044237 |
Drilling system and method
A closed-loop circulating system for drilling wells has control of the flow rates in and out of the wellbore. Kicks and fluid losses are quickly controlled by adjusting the backpressure. Kick...
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6820702 |
Automated method and system for recognizing well control events
An automated method and system for recognizing a well control event includes determining a state of drilling operations. When drilling operations are in a circulating state, a benchmark for a...
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6510270 |
Sub-oceanic cable network system and method
A cable system for installation on the ocean floor or under another body of water includes a plurality of sub-sea junction boxes installed at spaced locations throughout a predetermined sub-oceanic...
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6410862 |
Device and method for measuring the flow rate of drill cuttings
This invention relates to a device for measuring the flow rate of spoil from a drilling brought to the surface by means of a drilling fluid. The device comprises means of collecting the spoil and...
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6305216 |
Method and apparatus for predicting the fluid characteristics in a well hole
An improved apparatus and improved method for determining the characteristics of a multi-phase fluid along a well hole having a predefined geometric profile are presented. Various state properties...
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6286367 |
Method of evaluating the effluent of a hydrocarbon well by means of a multiphase flowmeter, and installation implementing the same
A multiphase flowmeter (30) is mounted on the piping via which a multiphase fluid flows out from a hydrocarbon well, so as to measure the flow rates of the various phases of the fluid. A...
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6234250 |
Real time wellbore pit volume monitoring system and method
A system is provided for monitoring in the real time the wellbore pit volume to promptly determine the occurrence of a wellbore kick and take corrective action to minimize fluid influx volume...
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6216532 |
Gas flow rate measurement
Once an oil well has been drilled and is producing, it is desirable to monitor the rate at which oil or gas is being delivered. It is particularly useful to know when there is a change in a fluid's...
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6058771 |
Determination of fluid influx or efflux
When drilling a borehole for an oil well it is desirable to know when fluid is passing through the walls of the borehole between the borehole itself and the formation through which the borehole is...
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5975219 |
Method for controlling entry of a drillstem into a wellbore to minimize surge pressure
A well drilling system for drilling with gaseous drilling fluid, particularly natural gas, in a closed circulation path including an enclosure or bell nipple mounted on a wellhead between the...
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5736637 |
Downhole multiphase flow sensor
A system for evaluating multiphase flow of a fluid downhole in a borehole. Dielectric permittivity electrodes generate a capacitance output signal through the fluid, and conductivity electrodes...
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5654504 |
Downhole pump monitoring system
The present invention relates to a downhole hydraulic pump monitoring system and more specifically relates to a system which detects and/or anticipates pump malfunctions by processing readings...
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5631413 |
Fluid holdup tool and flow meter for deviated wells
A production logging tool is provided for use within a well to directly measure a velocity profile of a multiphase fluid flow within a cross-section of a well. The production logging tool includes...
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5309761 |
Methods and apparatus for measuring the erodability of drilling fluid deposits
Methods of measuring the erodability of drilling fluid deposits and the shear stress required to remove drilling fluid deposits formed on the walls of a well bore are provided. The methods...
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5303582 |
Pressure-transient testing while drilling
A well testing method and apparatus for reservoir characterization during a drilling operation by making use of conventional drilling facilities. The tests can be performed at various degrees of...
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5205165 |
Method for determining fluid influx or loss in drilling from floating rigs
A method of determining fluid influx or loss from a well being drilled from a floating vessel and using a drilling fluid, the method comprising monitoring the flow of fluid from the well to obtain...
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5181419 |
Sampling of drilling mud
A sample flow of drilling mud is taken via a pipe 14 from a shale shaker tank 10 and passed into a container 15 with a vigorous stirrer 17 and having a capacity of typically 0.40 m 3 . The sample...
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5168932 |
Detecting outflow or inflow of fluid in a wellbore
A method is provided for detecting outflow of fluid from an offshore wellbore to a surrounding earth formation or inflow of fluid from the formation of the wellbore. The wellbore is in fluid...
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5070949 |
Method of analyzing fluid influxes in hydrocarbon wells
The invention relates to a method of analyzing fluid influxes into an oil well from an underground formation. During a drilling mud transient flow state, the successive values of the rate Q i or...
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5063776 |
Method and system for measurement of fluid flow in a drilling rig return line
Improved methods and systems are provided for determining a volumetric flow rate of mud in a return line without the aid of a velocity probe. A mud level sensor is located in a return line chimney...
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5018589 |
Process for finding the depth of a lost return zone
In a process of downhole drilling in an open hole, where the drill bit has struck a lost circulation zone in the wall of the formation, and mud circulating through the annulus during drilling has...
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4980642 |
Detection of influx of fluids invading a borehole
The present invention is directed to a system, apparatus and methods for determining influx of formation fluids into a well borehole during drilling. The methods of the present invention comprise...
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4941951 |
Method for improving a drilling process by characterizing the hydraulics of the drilling system
A variety of flow and pressure measurements are obtained to characterize the drilling fluids hydraulics system of the borehole drilling process. Notably, a differential pressure measurement which...
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4840061 |
Method of detecting a fluid influx which could lead to a blow-out during the drilling of a borehole
This invention is intended for use in the process of drilling an oil well and has to do with a process for the detection of fluid influx which could lead to a blow-out. This process consists of...
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4754641 |
Method and apparatus for measurement of fluid flow in a drilling rig return line
An improved method and apparatus is disclosed for use in a return line system of a drilling rig to determine a volumetric fluid flow rate and, therefore, to aid in detecting a kick in a well. The...
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4703664 |
Fluid flow measurement system sensor mounting block
A system, or apparatus combination, and apparatus components, for the measurement of fluid flow. Such system, or apparatus can be used, e.g. for measuring the amount or flow of drilling fluid, or...
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4610161 |
Method and apparatus for determining fluid circulation conditions in well drilling operations
A method and apparatus for establishing the rate at which fluid is transferred between an offshore well 16 and the formations 20 surrounding the well 16 in the course of drilling the well 16 from a...
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4553429 |
Method and apparatus for monitoring fluid flow between a borehole and the surrounding formations in the course of drilling operations
A method and apparatus for establishing the rate at which fluid is transferred between a borehole 14 and the surrounding formations 16 in the course of moving drill string 20 upward or downward in...
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4532812 |
Parametric acoustic flow meter
Method and apparatus for measuring the flow velocity of drilling mud returning from the annulus of a borehole. At least two parametric acoustic pulse transducers are longitudinally disposed with...
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4527425 |
System for detecting blow out and lost circulation in a borehole
A drilling mud flow rate detector, including a sub adapted for being positioned in the drill string, having a sonic signal generator located near the center of the sub in both the incoming mud flow...
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4440239 |
Method and apparatus for controlling the flow of drilling fluid in a wellbore
A method for controlling the flow of drilling fluid through a subaqueous wellbore is disclosed. The method comprises the steps of continuously measuring the output flow rate (A) of the drilling...
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4430892 |
Pressure loss identifying apparatus and method for a drilling mud system
Methods and means are disclosed for the monitoring of conditions in a mud circulation system as used in the drilling of oil and gas wells, and to quickly detect and indicate pressure failures that...
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4282939 |
Method and apparatus for compensating well control instrumentation for the effects of vessel heave
A method and apparatus is disclosed for determining the flow rate of drilling fluid flowing from a subaqueous well. The invention may also be used to determine the presence of an abnormal drilling...
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4040666 |
Apparatus and method of shield excavation
An apparatus and method for excavating tunnels with a shield and slurry while detecting and preventing excess excavation in high water content soft ground wherein, in each of feeding system of...
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4000645 |
Apparatus for pneumatically monitoring conditions of a well circulating system
Pneumatic apparatus for monitoring conditions of the drilling fluid circulating system of a well being drilled. A pneumatic signal having unequal duration times and representative of the rate of...
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3976148 |
Method and apparatus for determining onboard a heaving vessel the flow rate of drilling fluid flowing out of a wellhole and into a telescoping marine riser connecting between the wellhouse and the vessel
Method and apparatus for determining on board a heaving drilling vessel, the flow rate of drilling fluid flowing from a well hole and into a telescoping marine riser connecting the well hole with...
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3910110 |
Motion compensated blowout and loss circulation detection
A system for detecting the commencemenet of a blowout or lost circulation in a subaqueous well being drilled from a floating vessel in which drilling fluid is being utilized. The rates of flow of...
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3857281 |
METHOD AND APPARATUS FOR DETECTING POTENTIALLY DANGEROUS CONDITIONS IN A WELL BORE DURING TRIPS OF THE WELL STRING IN AND OUT OF THE WELL BORE
A method and apparatus for detecting potentially dangerous conditions in a well bore which is being drilled by the use of a drill string suspended in the well bore and with a drilling mud system....
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3811322 |
METHOD AND APPARATUS FOR MONITORING RETURN MUD FLOW
A method and apparatus for monitoring steady state mud flow return rate through a marine riser extending between a floating drill ship and the ocean floor, and including a telescopic joint wherein...
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3800277 |
METHOD AND APPARATUS FOR SURFACE-TO-DOWNHOLE COMMUNICATION
Downhole operations within a well borehole are controlled by utilization of various communication channels within the borehole. The conditions within these communication channels are detected...
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3760891 |
BLOWOUT AND LOST CIRCULATION DETECTOR
A method and apparatus for rapidly detecting blowouts and lost circulation in a drilling well, having particular application to a well being drilled at sea from a floating drilling platform. The...
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3726136 |
DRILLING-FLUID CONTROL-MONITORING APPARATUS
A control-monitoring apparatus, which is adapted to cooperate in a drilling-fluid circulation system, having a level indicating apparatus to sense the level change of the drilling-fluid in the...
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3614761 |
METHOD AND APPARATUS FOR MONITORING POTENTIAL OR LOST CIRCULATION IN AN EARTH BOREHOLE
Method and apparatus for monitoring potential blowouts or lost circulation in a well by employing sensing devices on the drilling fluid pump and the well bore return pipe for the drilling fluid....
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3602322 |
FLUID FLOW MONITORING SYSTEM FOR WELL DRILLING OPERATIONS
For well drilling operations, a fluid flow measuring system that senses well input and output flows and converts them into compared electrical analogues for signaling the operator upon the...
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3541854 |
DEVICE FOR SENSING THE PRODUCT OF THE DENSITY AND THE SQUARE OF THE RATE OF CIRCULATION OF A FLUID
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3002379 |
Process and apparatus for magnetic flow measurement
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2966059 |
Indicator of drilling mud gain and loss
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