By a News Reporter-Staff News Editor at Journal of Engineering -- SCHLUMBERGER TECHNOLOGY CORPORATION (Sugar Land, TX) has been issued patent number 9377561, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.
The patent's inventors are Rogers, Bryan K. (Spring, TX); Karuppoor, Srinand S. (Sugar Land, TX); Espinosa, Frank F. (Titusville, NJ); Palaghita, Tudor I. (Houston, TX).
This patent was filed on March 5, 2014 and was published online on June 28, 2016.
From the background information supplied by the inventors, news correspondents obtained the following quote: "Well-logging instruments are used in boreholes to make, for example, formation evaluation measurements and infer properties of the formation surrounding the borehole and the fluids in the formations. Such well-logging instruments may include resistivity logging tools that measure the resistivities of earth formations surrounding a borehole, such as in a hydrocarbon (e.g., oil, natural gas, etc.) well. One approach for performing resistivity measurements is by lowering a wireline-conveyed logging device into a borehole after the borehole is drilled.
"Another approach is to make such measurements while the well is being drilled, which referred to as logging-while-drilling (LWD) or measurement-while-drilling (MWD). LWD or MWD techniques may allow corrective actions to be taken during the drilling processes if desired. For example, borehole information, if available, in real time may be used to make adjustments to mud weights to prevent formation damage and to improve well stability. In addition, real time formation log data may be used to direct a drill bit to the desired direction (i.e., geosteering).
"Some well-logging tools have coils or electrical conductors mounted on the housing forming a downhole tubular. These conductors are connected to electronic devices contained inside the housing, which protects the electronics from the harsh downhole environment. A feedthrough connects the exposed conductors to the electronic devices contained within the housing. In order to maintain good electrical conductivity under harsh operating conditions, the conductor is protected by an overmolding in rubber or a thermopolastic or thermoset polymer, e.g., Teflon.RTM.. In higher temperature downhole operating conditions above 180.degree. C., however, Teflon.RTM. and similar polymers have a reduced lifetime and often stop functioning as a seal altogether, resulting in the loss of insulation and loss of conduction as electrical connections are exposed to the harsh downhole environmental conditions."
Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "This summary is provided to introduce a selection of concepts that are further described below in the detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in limiting the scope of the claimed subject matter.
"A well-logging tool for a geological formation includes a housing is to be positioned within a borehole and has first and second openings therein. A feedthrough assembly includes an elongate electrical conductor having opposing first and second ends and a medial portion extending therebetween. An integrally formed, monolithic, dielectric layer surrounds the elongate electrical conductor and includes a first enlarged diameter end portion surrounding the first end of the elongate electrical conductor and is positioned within the first opening. A second enlarged diameter end portion surrounds the second end of the elongate electrical conductor and is positioned within the second opening. A reduced diameter portion surrounds the medial portion of the elongate electrical conductor.
"In an example, the integrally formed, monolithic, dielectric layer is formed as a polyketone polymer such as a Polyether Ketone (PEK) polymer or a Polyether Ether Ketone (PEEK) polymer. In some embodiments, the feedthrough assembly may include a first contact coupled to the first end of the elongate electrical conductor, and a second contact coupled to the second end of the elongate electrical conductor. In other embodiments, the first end of the elongate electrical conductor extends outward beyond adjacent portions of the enlarged diameter end portion of the integrally formed, monolithic, dielectric layer. The second end of the elongate electrical conductor extends outward beyond adjacent portions of the second enlarged diameter end portion of the integrally formed, monolithic, dielectric layer.
"In another example, the feedthrough assembly includes at least one first O-ring surrounding the first enlarged diameter end of the integrally formed, monolithic, dielectric layer and at least one second O-ring surrounding the second enlarged diameter end of the integrally formed, monolithic, dielectric layer. At least one electronic device is carried by the housing and is coupled to the feedthrough assembly. An electrically conductive winding is carried by the housing and coupled to the feedthrough assembly in another example. The elongate electrical conductor may include an electrical device.
"A method of making a well-logging tool for a geological formation having a borehole therein is also disclosed."
For the URL and additional information on this patent, see: Rogers, Bryan K.; Karuppoor, Srinand S.; Espinosa, Frank F.; Palaghita, Tudor I.. Feedthrough Assembly for Well-Logging Tool. U.S. Patent Number 9377561, filed March 5, 2014, and published online on June 28, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9377561.PN.&OS=PN/9377561RS=PN/9377561
Keywords for this news article include: SCHLUMBERGER TECHNOLOGY CORPORATION.
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