Abstract:
Disclosed is an apparatus for estimating a property of a fluid. The apparatus includes: a piezoelectric resonator configured to be disposed in the fluid; an electrode embedded in the piezoelectric resonator and included in a resonator circuit configured to output an electrical signal related to the property; a discontinuity defined by a surface of the piezoelectric resonator, the discontinuity altering an impedance of the resonator circuit if a high-dielectric fluid or a conductive fluid is disposed in the discontinuity; and an insulating material disposed in the discontinuity.
Abstract:
A system for measuring a true vertical depth of a downhole tool is provided. The system includes: a first optical clock located at a first depth and having a first frequency; a second optical clock disposable at a downhole location and having a second frequency at the downhole location; and a processor for receiving the first frequency and the second frequency, and calculating a true vertical depth of the second optical clock based on a difference between the first frequency and the second frequency. A system and computer program product for measuring a true vertical depth of a downhole tool are also provided.
Abstract:
A downhole fluid sample container includes a fluid sample container detachably coupled to a downhole sub, the fluid sample container having an internal chamber for receiving the downhole fluid. At least one semimetal (for example, silicon or germanium) window is coupled to the fluid sample container, the window being substantially transparent to electromagnetic energy wavelengths within a selected band. A method includes transmitting electromagnetic energy from an electromagnetic energy source to downhole fluid through at least one semimetal window in a container, receiving an electromagnetic energy response with a spectrometer, and estimating the downhole fluid property based at least in part on the electromagnetic energy response.
Abstract:
Devices and related methods for reducing a thermal loading of one or more components may include a housing having an interior for receiving the component(s), and a thermally conductive flowable material in thermal communication to the component(s).
Abstract:
An apparatus for characterizing a fluid property in a vessel may include a first member and a second member. The first member and the second member may be oriented at a non-zero angle. The second member may be responsive to the motion of the first member, and the first member may be acoustically coupled to the fluid by the vessel. Also, a method for characterizing the fluid includes using the response of the second member to estimate the fluid property.
Abstract:
A method is disclosed for changing an optical path length through a fluid downhole, comprising interspersing an optically transmissive member into a first optical path through the fluid, thereby creating a second shorter optical path through the fluid. In another embodiment, the method further comprises measuring an intensity of light, I1 transmitted through the first optical path; measuring an intensity of light, I2 transmitted through the second optical path; and estimating an optical property for the second optical path from the ratio, I1/I2. A system is disclosed for changing an optical path length through a fluid downhole, comprising a fluid passage between two optically transmissive windows for the fluid downhole, the fluid passage having a first optical path through the fluid; and an optically transmissive member for insertion into the first optical path, thereby creating a second shorter optical path through the fluid.
Abstract:
An instrument for use in a borehole, the instrument including a pressure tuned light source disposed in a housing adapted for insertion into the borehole.
Abstract:
Apparatus and method are disclosed for detecting gas in return fluids. A semi-permeable interface is disposed on a tool sub, the semi-permeable interface being in communication with a fluid cell and with a return fluid in an annular region defined by an outside the tool sub and a borehole wall. A sensor responsive to a gas carried by the return fluid is disposed in the fluid cell to sense the gas that enters the fluid cell from the return fluid via the semi-permeable interface.
Abstract:
An apparatus for estimating a property of a subterranean material, the apparatus including: a photon induced emission device configured to be disposed in a borehole penetrating the subterranean material and to provide an output related to an induced emission interaction with a received photon that generates an electron that is used for providing the output; wherein the output is used for estimating the property.
Abstract:
A system for supplying voltage to a downhole component is disclosed. The system includes: a pyroelectric material disposed in electrical communication with the component, the component configured to be disposed within a borehole in an earth formation; and a heating unit in operable communication with the pyroelectric material and configured to change a temperature of the pyroelectric material and cause the pyroelectric material to generate a voltage to activate the component. A method of supplying voltage to a downhole component is also disclosed.