William Marsh Rice University

Halliburton Energy Services, Inc.

Other

Ken A Smith

Richard E Smalley

Daniel T Colbert

Jie Liu

Jason H Hafner

Pavel Nikolaev

Hongjie Dai

Andreas Thess

Andrew Gabriel Rinzler

Ting Guo

Chad Huffman

Peter James Boul

Robert H Hauge

John L Margrave

Edward T Mickelson

Ronald Glen Dusterhoft

Harold Grayson Walters

Priyesh Ranjan

Glenn Robert McColpin

Robert Kelley Bradley

Michael O'Connell

Michael J Bronikowski

Frank Rohmund

Mikko K Jaaskelainen

Rajesh Kumar Saini

Abbas Arian

Randall Bennett Jones

Bruce W Mackay

Boris I Yakobson

Wan-Ting Chiang

Deron A Walters

Michael J Casavant

Wes Ludwig

John U Jansen

Robert H Hague

Some aspects of what is described here relate to seismic data analysis techniques. A seismic excitation is generated in a first directional wellbore section in a subterranean region. A seismic response associated with the seismic excitation is detected in a second directional wellbore section in the subterranean region. Seismic response data based on the seismic response are analyzed to identify geomechanical properties of subterranean rock in a fracture treatment target region in the subterranean region. In some cases, the geomechanical properties include pore pressure, stress, or mechanical properties.

Analyzing geomechanical properties of subterranean rock based on seismic data

A method and system for using a distributed electromagnetic sensing system in horizontal hydraulic fracturing wells to monitor fracture growth in real time.

Fracture growth monitoring using EM sensing

A seismic excitation is generated in a first directional wellbore section in a subterranean region. A seismic response associated with a seismic excitation is detected by a fiber optic distributed acoustic sensing array in a second directional wellbore section in the subterranean region. A fracture treatment of the subterranean region is analyzed based on the seismic response.

Fracture treatment analysis based on distributed acoustic sensing

Light bulb receptacles and light bulb sockets are described. According to one aspect, a light bulb receptacle includes a housing which defines a housing chamber, a light bulb socket within the housing chamber and which comprises a first end and a second end about a light bulb chamber which is configured to receive a base of a light bulb, wherein the light bulb socket further comprises a plurality of fingers which extend outwardly from the first end toward the second end and define an opening to the light bulb chamber at the second end, wherein the fingers are individually configured to move outwardly from the light bulb chamber during insertion and removal of the light bulb via the opening to the light bulb chamber, and wherein the fingers individually comprise an engagement member configured to engage a base of the light bulb received within the light bulb chamber and to retain the light bulb received within the light bulb chamber.

Light bulb receptacles and light bulb sockets

The formation of arrays of fullerene nanotubes is described. A microscopic molecular array of fullerene nanotubes is formed by assembling subarrays of up to 10fullerene nanotubes into a composite array.

Method for forming composites of sub-arrays of fullerene nanotubes

This invention is directed to chemical derivatives of carbon nanotubes wherein the carbon nanotubes have a diameter up to 3 nm. In one embodiment, this invention also provides a method for preparing carbon nanotubes having substituents attached to the side wall of the nanotube by reacting single-wall carbon nanotubes with fluorine gas and recovering fluorine derivatized carbon nanotubes, then reacting fluorine derivatized carbon nanotubes with a nucleophile. Some of the fluorine substituents are replaced by nucleophilic substitution. If desired, the remaining fluorine can be completely or partially eliminated to produce carbon nanotubes having substituents attached to the side wall of the nanotube. The substituents are dependent on the nucleophile, and preferred nucleophiles include alkyl lithium species such as methyl lithium.

Sidewall derivatized carbon nanotubes

This invention relates generally to carbon fiber produced from fullerene nanotube arrays. In one embodiment, the present invention involves a macroscopic carbon fiber comprising at least 10fullerene nanotubes in generally parallel orientation.

Continuous fiber of fullerene nanotubes

This invention relates generally to forming an array of fullerene nanotubes. In one embodiment, a macroscopic molecular array is provided comprising at least about 10fullerene nanotubes in generally parallel orientation and having substantially similar lengths in the range of from about 5 to about 500 nanometers.

Array of fullerene nanotubes

This invention is directed to making chemical derivatives of carbon nanotubes and to uses for the derivatized nanotubes, including making arrays as a basis for synthesis of carbon fibers. In one embodiment, this invention also provides a method for preparing single wall carbon nanotubes having substituents attached to the side wall of the nanotube by reacting single wall carbon nanotubes with fluorine gas and recovering fluorine derivatized carbon nanotubes, then reacting fluorine derivatized carbon nanotubes with a nucleophile. Some of the fluorine substituents are replaced by nucleophilic substitution. If desired, the remaining fluorine can be completely or partially eliminated to produce single wall carbon nanotubes having substituents attached to the side wall of the nanotube. The substituents will, of course, be dependent on the nucleophile, and preferred nucleophiles include alkyl lithium species such as methyl lithium. Alternatively, fluorine may be fully or partially removed from fluorine derivatized carbon nanotubes by reacting the fluorine derivatized carbon nanotubes with various amounts of hydrazine, substituted hydrazine or alkyl amine. The present invention also provides seed materials for growth of single wall carbon nanotubes comprising a plurality of single wall carbon nanotubes or short tubular molecules having a catalyst precursor moiety covalently bound or physisorbed on the outer surface of the sidewall to provide the optimum metal cluster size under conditions that result in migration of the metal moiety to the tube end.

Functionalized single-wall carbon nanotubes

This invention relates generally to forming a patterned array of fullerene nanotubes. In one embodiment, a nanoscale array of microwells is provided on a substrate; a metal catalyst is deposited in each microwells; and a stream of hydrocarbon or CO feedstock gas is directed at the substrate under conditions that effect growth of fullerene nanotubes from each microwell.

Method for forming a patterned array of fullerene nanotubes

This invention relates generally to cutting fullerene nanotubes. In one embodiment, the present invention provides for preparation of homogeneous populations of short fullerene nanotubes by cutting and annealing (reclosing) the nanotube pieces followed by fractionation. The cutting and annealing processes may be carried out on a purified nanotube bucky paper, on felts prior to purification of nanotubes or on any material that contains fullerene nanotubes. In one embodiment, oxidative etching with concentrated nitric acid is employed to cut fullerene nanotubes into shorter lengths. The annealed nanotubes may be disbursed in an aqueous detergent solution or an organic solvent for the fractionation. Closed tubes can also be derivatized to facilitate fractionation, for example, by adding solubilizing moieties to the end caps.

Method for cutting fullerene nanotubes

This invention relates generally to a method for producing self-assembled objects comprising fullerene nanotubes and compositions thereof. In one embodiment, the present invention involves a three-dimensional structure of derivatized fullerene nanotubes that spontaneously form. It includes several components having multiple derivatives brought together to assemble into the three-dimensional structure. In another embodiment, objects may be obtained by bonding functionally-specific agents (FSAs) to groups of nanotubes, enabling them to form into structures. The bond selectivity of FSAs allow selected nanotubes of a particular size or kind to assemble together and inhibit the assembling of unselected nanotubes that may also be present.

Method for producing self-assembled objects comprising fullerene nanotubes and compositions thereof

This invention relates generally to a method for producing composites of fullerene nanotubes and compositions thereof. In one embodiment, the present invention involves a method of producing a composite material that includes a matrix and a fullerene nanotube material embedded within said matrix. In another embodiment, a method of producing a composite material containing fullerene nanotube material is disclosed. This method includes the steps of preparing an assembly of a fibrous material; adding the fullerene nanotube material to the fibrous material; and adding a matrix material precursor to the fullerene nanotube material and the fibrous material.

Methods for producing composites of fullerene nanotubes and compositions thereof

This invention relates generally to a fullerene nanotube composition. The fullerene nanotubes may be in the form of a felt, such as a bucky paper. Optionally, the fullerene nanotubes may be derivatized with one or more functional groups. Devices employing the fullerene nanotubes of this invention are also disclosed.

Fullerene nanotube compositions

This invention relates generally to a method for producing fullerene nanotube catalyst supports and compositions thereof. In one embodiment, fullerene nanotubes or fullerene nanotube structures can be employed as the support material. A transition metal catalyst is added to the fullerene nanotubes. In a preferred embodiment, the catalyst metal cluster is deposited on the open nanotube end by a docking process that insures optimum location for the subsequent growth reaction. The metal atoms may be subjected to reductive conditions.

Growing community of inventors

Houston, TX, United States of America

Ken A Smith