Exxonmobil Upstream Research Company

Exxonmobil Research and Engineering Company

Michael John Luton

Dennis G Peiffer

Ramesh Gupta

Richard S Polizzotti

Barbara Carstensen

Paul Matthew Spiecker

Norman M Pokutylowicz

Narasimha-Rao Venkata Bangaru

Jayoung Koo

Hans Thomann

P Matthew Spiecker

Shiun Ling

Clifford W Petersen

A compressible object is described that may be utilized in drilling mud and with a drilling system to manage the density of the drilling mud. The compressible object includes a shell that encloses an interior region. Also, the compressible object has an internal pressure (i) greater than about 200 pounds per square inch at atmospheric pressure and (ii) selected for a predetermined external pressure, wherein external pressures that exceed the internal pressure reduce the volume of the compressible object and wherein the shell being designed to reduce localized strains of the compressible object during expansion and compression of the compressible object.

Compressible objects having a predetermined internal pressure combined with a drilling fluid to form a variable density drilling mud

A compressible object is described that may be utilized in drilling mud and with a drilling system to manage the density of the drilling mud. The compressible object includes a shell that encloses an interior region. The interior region of the shell is at least partially filled with a foam. The internal pressure of the compressible object may be greater than about 200 psi (pounds per square inch) at atmospheric pressure, greater than 500 psi at atmospheric pressure, greater than 1500 psi at atmospheric pressure or more preferably greater than 2000 psi at atmospheric pressure.

Compressible objects having partial foam interiors combined with a drilling fluid to form a variable density drilling mud

A compressible object is described that may be utilized in drilling mud and with a drilling system to manage the density of the drilling mud. The compressible object includes a shell that encloses an interior region. The shell experiences less strain when the external pressure is about equal to the internal pressure than when the external pressure is above or below a predetermined compression interval of the compressible object includes a shell that encloses an interior region.

Compressible objects combined with a drilling fluid to form a variable density drilling mud

Methods for fabricating compressible object are described. These compressible objects may be utilized in drilling mud and with a drilling system to manage the density of the drilling mud. The method includes selecting an architecture for a compressible object; selecting a wall material for the compressible object; and fabricating the compressible object, wherein the compressible object has a shell that encloses an interior region, and has an internal pressure (i) greater than about 200 pounds per square inch at atmospheric pressure and (ii) selected for a predetermined external pressure, wherein external pressures that exceed the internal pressure reduce the volume of the compressible object.

Method for fabricating compressible objects for a variable density drilling mud

A method for refining the grain size of alloys which undergo ferromagnetic to paramagnetic phase transformation and an alloy produced therefrom. By subjecting the alloy to a timed application of a strong magnetic field, the temperature of phase boundaries can be shifted enabling phase transformations at lower temperatures.

Grain refinement of alloys using magnetic field processing

A method for processing a hot formed, high-tensile-strength steel having an ultimate tensile strength (UTS) of at least about 730 MPa (105 ksi) and excellent toughness to retain essentially all the strength and toughness is provided. This processing is needed for the fabrication of high strength fittings that are used in the construction of linepipe for transport of natural gas, crude oil, as well as other applications. Furthermore, the hot formed high strength steel may be weldable with a Pcm of less than or equal to 0.35.

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Bedminster, NJ, United States of America

Michael John Luton