Abstract:
An apparatus for estimating an ambient environment at which inorganic scale will form in a downhole fluid includes a stress chamber disposed in a borehole in a production zone at a location within a specified range of maximum pressure and configured to receive a sample of the fluid from the production zone and to apply an ambient condition to the sample that causes the formation of inorganic scale. An inorganic scale sensor is configured to sense formation of inorganic scale within the chamber and an ambient environment sensor is configured to sense an ambient environment within the chamber at which the formation of inorganic scale occurs. The apparatus further includes a processor configured to receive measurement data from the inorganic scale sensor and the ambient environment sensor and to identify the ambient environment at which the formation of inorganic scale occurs.
Abstract:
A method, system and drilling apparatus for directional drilling are disclosed. A drill bit is located at a downhole end of a drill string in a borehole. A length of the borehole between a surface location and the drill bit at the downhole end of a drill string is determined and an azimuth angle and inclination of the drill bit is obtained. The length of the borehole may be determined by recording an arrival time at a downhole location of an acoustic pulse travelling from a surface location to the downhole location and determines the travel time and borehole length therefrom. A downhole processor determines a position and orientation of the drill bit from the determined length, azimuth angle and inclination and alters a steering parameter of the drill bit using the determined position and orientation of the drill bit to obtain a selected trajectory for drilling the borehole.
Abstract:
Methods and systems including a photodetector of a downhole tool for performing downhole operations are provided herein. The photodetector includes a housing configured along a carrier disposed downhole within a borehole and a graphene tunneling photodetector located within the housing configured to perform a downhole operation.
Abstract:
A system, apparatus and method for determining an acoustic property of a fluid in a wellbore is disclosed. A faceplate is placed in the wellbore with a stepped surface of the faceplate in contact with the fluid. The stepped surface includes a non-stepped face and a stepped face. A first portion of an acoustic pulse passes from the faceplate into the fluid via the non-stepped face and a second portion of the acoustic pulse passes from the faceplate into the fluid via the stepped face. A first reflected acoustic pulse related to the first portion of the acoustic pulse is received. A second reflected acoustic pulse related to the second portion of the acoustic pulse is received. A measurement of the first reflected acoustic pulse and a measurement of the second reflected pulse are used to determine the acoustic property of the fluid in the wellbore.
Abstract:
In one aspect, a method of estimating one of inclination and orientation of a downhole device is provided that includes the features of taking pressure measurements at a plurality of locations on the downhole device in the wellbore, wherein at least one location in the plurality of locations is vertically displaced from at least one other location, and estimating the one of the inclination and orientation of the downhole device from the plurality of pressure measurements. In another aspect, a downhole tool is disclosed that in one configuration includes a device for estimating inclination and/or orientation of the downhole tool that further includes a body containing a liquid therein and a plurality of pressure sensors arranged in the body configured to provide pressure measurements of the liquid in the body, wherein a pressure sensor in the plurality of pressure sensors is vertically disposed from at least one other sensor in the plurality of sensors.
Abstract:
An apparatus for estimating an ambient environment at which organic scale will form in a downhole fluid includes a stress chamber disposed in a borehole in a production zone at a location of maximum pressure and configured to receive a sample of the fluid from the production zone and to apply an ambient condition to the sample that causes the formation of organic scale. A sensor is configured to sense formation of organic scale within the chamber and an ambient environment sensor is configured to sense an ambient environment within the chamber at which the formation of organic scale occurs. The apparatus further includes a processor configured to receive measurement data from the organic scaling sensor and the ambient environment sensor and to identify the ambient environment at which the formation of organic scale occurs using the organic scaling sensor measurement data and ambient environment sensor measurement data.
Abstract:
Downhole tools for use in wellbores in subterranean formations comprise a body comprising at least one anomalous strengthening material. Methods of forming downhole tools for use in wellbores in subterranean formations comprise forming a body comprising at least one anomalous strengthening material. Methods of using downhole tools in wellbores in subterranean formations comprise disposing a body comprising at least one anomalous strengthening material in a wellbore in a subterranean formation. The at least one anomalous strengthening material may be exposed to a temperature within the wellbore higher than a temperature at a surface of the subterranean formation and a yield strength of the at least one anomalous strengthening material may increase.
Abstract:
Pairs of acoustic transducers positioned at different radial distances in a conduit are used to measure travel times of acoustic signals in opposite directions and inclined to the direction of a fluid flow in the borehole. These contrapropagation measurements are used to estimate fluid velocity and volumetric flow rates of the fluid components in the conduit.
Abstract:
In one aspect, an apparatus for determining a property of a fluid is disclosed that in one embodiment may include a transparent member having an axis and a first end substantially perpendicular to the axis and a second end having an outer surface at a first angle to the axis, a light source directing light at the first end, a detector placed spaced from the second end, the space between the second end and the detector containing a fluid, wherein the detector detects light exiting from the outer surface at a second angle to the axis and passing through the fluid, and a controller for determining the second angle from the light detected by the detector. A processor determines the bulk fluid refractive index from the light detected by the detector and a property of the fluid therefrom.
Abstract:
A stepped reflector on the outside of a bottomhole assembly produces two reflections in response to excitation of a transducer. The velocity of the fluid in the borehole is estimated using the two reflections. Alternatively, a change in the gas content of the borehole fluid is estimated from changes in the electrical impedance of a transducer in contact with the borehole fluid.