Abstract: A method for reducing drill tubular vibrations includes: constructing a mathematical model the drill tubular having mass distribution, material stiffness and material damping; constructing an equation of motion of the drill tubular in one of a time domain and frequency domain; transforming the equation of motion into a modal domain equation of motion to provide a mode shape of the drill tubular at an eigenfrequency, the mode shape providing an amplitude at a position along the drill tubular; comparing the amplitude at the position along the drill tubular to a threshold amplitude value; modifying at least one of the mass distribution, material stiffness and material damping if the amplitude exceeds the threshold value; and iterating the above step until at least one of the amplitude of the latest mode shape at the position is less than or equal to the threshold amplitude value and a predetermined constraint limits the modifying.

Abstract: An ECM method involves the use of a thin hollow electrode assembly that carries the electrolyte within and that is advanced relatively to the workpiece. The small profile of the electrode results in a minimal removal of metal in forming the desired rotor or stator shape. The electrode profile allows significant power consumption reduction or increased machining speed for a given rate of power input. The electrode can be a unitary ring shape or can be made of segments that are placed adjacent each other so that a continuous shape is cut. Not all the lobes of the stator or rotor have to be cut in the same pass. Electrode segments can be used to sequentially provide the desired lobe count in separate passes. The lobe shapes in the electrode can be slanted to get the desired rotor or stator pitch or they can be aligned with the workpiece axis.

Abstract: A hydraulic fracture diagnostic system for reservoir evaluation of a high angle wellbore includes a coiled tubing string that extends from the surface to a location within a wellbore. The system includes a sensor and a pump connected to the coiled tubing string. A tool having at least two packing elements and a port positioned between the packing elements is connected to the coiled tubing string. The coiled tubing string positions the tool adjacent a fracture. The packing elements isolate the fracture and the port is configured to provide communication with the isolated portion of the wellbore. A diagnostic method includes pumping a volume of fluid from the isolated portion of a wellbore using a coiled tubing string and monitoring the pressure within the coiled tubing string. Pressure within the coiled tubing string may also be monitored after injection of fluid into the isolated wellbore through the coiled tubing string.

Abstract: Methods of attaching a polycrystalline diamond compact (PDC) element to a substrate include maintaining a gap between the PDC element and an adjacent substrate, and at least substantially filling the gap with a deposition process. Methods of forming a cutting element for an earth-boring tool include forming a PDC element by pressing diamond crystals together, forming a substrate including a particulate carbide material and a matrix material, leaving a gap between at least portions of the PDC element and the substrate, masking surfaces of the PDC element and of the substrate that do not face the gap, and forming an adhesion material on surfaces of the PDC element and of the substrate that face the gap. Cutting elements for earth-boring tools include a PDC element attached to a substrate with at least one of diamond, diamond-like carbon, a carbide material, a nitride material, and a cubic boron nitride material.

Abstract: A downhole tool includes a tool body having an inner surface portion and an outer surface portion. The outer surface portion includes a recess having a peripheral wall and an inner surface. A multi-chip module (MCM) housing is defined in the recess. The MCM housing includes one or more fortifying members that support axial and radial loading of the downhole tool and include one or more electronics receiving zones.

Abstract: A shaped compressed pellet formed from a composite of a well treatment agent adsorbed onto a calcined porous metal oxide or into the interstitial spaces of the calcined porous metal oxide may be introduced into an oil or gas producing well. The well treatment agent of the shaped compressed pellet may be used to prevent and/or control the formation of deposits in the well.

Abstract: An additive, such as an aminal, a dibutylamine, or combinations thereof, may treat a system having a corrosion inhibitor in the form of at least one sulfur species and/or at least one phosphorous-containing compound. The additive may be introduced or added to the corrosion inhibitor within an aqueous system, an aerobic system, and/or an anaerobic system to inactivate the sulfur species and/or the phosphorous-containing compounds.

Abstract: In one aspect, an anchoring device is disclosed, including: a degradable substrate with a first hardness; and a granular gripping material associated with the outer extent of the degradable substrate, wherein the granular gripping material has a second hardness greater than the first hardness. In certain embodiments, the granular gripping material is degradable. In another aspect, a method to anchor a downhole device is disclosed, including: providing a degradable substrate with a first hardness; and applying a granular gripping material to the outer extent of the degradable substrate, wherein the granular gripping material has a second hardness greater than the first hardness.

Abstract: An apparatus for measuring resistivity in a borehole includes first and second modules configured to be conveyed through the borehole and a transmitter connected to the first module, the transmitter transmitting a transmitter signal that causes a field signal to be created in a formation surrounding the borehole. The apparatus also includes a receiver connected to the second module configured to sense the field signal, a reflection generator and a delay determination circuit that includes a pulse generator and a timer. The apparatus also includes a communication link coupling the delay determination circuit and the reflection generator. The delay determination circuit causes a first pulse to be transmitted to the reflection generator and determines an indication that is related to the time until a reflection is received back from the reflection generator.

Abstract: In one aspect, an apparatus for treating a formation is disclosed that in one non-limiting embodiment includes a first string for placement in the wellbore that includes a first flow port that enables a treatment fluid to flow from inside the first string to the formation via an annulus between the first string and the formation, a second string for placement in the first string, wherein the second string includes a second flow port that supplies the treatment fluid to the first flow port along a selected radial orientation to direct the treatment fluid in the selected radial direction.

Abstract: An electrical submersible pump assembly has a pump driven by a motor. A pressure compensator has first and second bellows units axially separated from each other. Each of the first and second bellows units are movable between an increased volume position and a decreased volume position and have a bias toward the decreased volume position. The bias of the first bellows unit is greater than the bias of the second bellows unit. The greater bias of the first bellows unit over the second bellows unit causes the second bellows unit to be at a full volume position at a lower level of the pressure differential than the level at which the first bellows unit is at the full volume position.

Abstract: A carbon composite contains a plurality of expanded graphite particles; and a second phase comprising a carbide, a carbonization product of a polymer, or a combination thereof; wherein the second phase bonds at least two adjacent basal planes of the same expanded graphite particle together. Methods of making the carbon composite and articles comprising the carbon composite are also disclosed.

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: In one aspect, an apparatus for use in a wellbore is disclosed that in one embodiment includes an electrically-conductive member having an outer and/or inner surface coated with an electrically-insulating material, a transmitter placed at a first location on the electrically-conductive member that induces electromagnetic wave signals that travel along the coated surface of the electrically conductive member, and a receiver placed at a second location spaced from the first location on the electrically-conductive member that detects the electromagnetic induced by the transmitter.

Abstract: A reinforced composite comprises: a reinforcement material comprising one or more of the following: a carbon fiber based reinforcing material; a fiberglass based reinforcing material; a metal based reinforcing material; or a ceramic based reinforcing material; and a carbon composite; wherein the carbon composite comprises carbon and a binder containing one or more of the following: SiO2; Si; B; B2O3; a metal; or an alloy of the metal; and wherein the metal is one or more of the following: aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

Abstract: A inflow control device includes a housing. A filter media disposed in the housing. A closure member; and a spring disposed between the closure member and the filter media. A method for controlling fluid loss for a period of time.

Abstract: A releasable production packer employs lock ring segments that are biased radially inwardly for engaging a mating pattern external to the packer mandrel. The mandrel has openings aligned with the segments and a release tool that latches to the mandrel for support and then moves the segments radially outwardly away from engagement with the mandrel so that the slips and sealing elements can extend axially and retract radially. After those movements the packer is retrieved. The release tools moves the locking segments only radially for the maximum mechanical advantage without risk of bending or deforming small parts.

Abstract: Treatment fluid is screened at a surface location to the same particle size that the mud is screened before delivery into treating equipment in the borehole. Solids or microgels that can form are captured before pumping into the borehole to prevent fouling of screens designed to keep formation solids out of the produced fluids to the surface.

Abstract: A motor lead extends alongside an electrical pump assembly for supplying electrical power to the motor. The motor lead has electrical power wires positioned side-by-side in a sub assembly. Each of the electrical power wires has an electrical conductor encased in an insulation layer, which in turn is encased in a lead sheath. A metallic band armor wraps around the sub assembly. A thermal barrier layer is located between an inward facing side of the sub assembly and the pump assembly. The thermal barrier layer is formed of thermal insulation material and has a width at least equal to a width of the sub assembly. The motor lead is free of any thermal barrier layers on the outward facing side of the sub assembly to as to allow heat within the sub assembly to dissipate outward.

Abstract: A method for presenting oilfield data to a user includes: searching a plurality of oilfield data sources for raw oilfield data; applying an algorithm as needed to the raw oilfield data; providing a quality control check on the oilfield data; deleting any oilfield data that does not pass the quality control check; tagging oilfield data that passes the quality control check with one or more searchable identifiers; storing any oilfield data that passes the quality control check and associated one or more identifiers in a storage medium; receiving a request for specified oilfield data from a user; searching identifiers in the storage medium to identify the specified oilfield data; and sending the identified specified oilfield data in the storage medium to the user. The method may also include planning an oilfield action using the specified oilfield data and implementing the planned oilfield action using oilfield equipment.