Borgwarner Inc.

Vector Magnetics, LLC

Mariano S Garcia

Arthur F Kuckes

Kevin B Todd

Matthew W Crump

Rahn Pitzer

Jeffrey Owen Foster

Morgan Thompson

David Mohler

Measurement of the inclination and azimuthal direction of a borehole extending beneath an obstacle, such as a body of water, which utilizes magnetic and gravity sensors at the drill bit of a borehole being drilled. Embodiments of the present invention determine and remove remanent field components and the effects of ferromagnetic permeability prior to and during drilling of the borehole.

Magnetic borehole surveying method and apparatus

Determining distance and direction from a first borehole to a second borehole including generating a time-varying magnetic field by axially reciprocating magnets of opposed polarity, at a first location in a second borehole, and detectable in the region of the first borehole. First and second sensors positioned at an observation point in the first borehole measure the amplitude and relative phase of components of the magnetic field. From these measurements, the direction, relative to the sensors, from an observation point to the first location is determined. The distance between these points is determined by measuring amplitude variations with depth of the magnetic field at observation points in the first borehole and computing theoretical variations in the amplitude for different assumed distances between the observation points and the location of the magnetic field source which are compared with theoretical variations to determine the distance between the first and second boreholes.

Magnetic distance and direction measurements from a first borehole to a second borehole

A torsionally compliant sprocket system includes a first sprocket (); a second sprocket () mounted in side-by-side relation to the first sprocket (); a resilient member () that resiliently couples the second sprocket () to the first sprocket () to allow limited angular rotation of the second sprocket () with respect to the first sprocket (); and a locking structure () that is biased toward an engaged position in which angular motion of the second sprocket () with respect to the first sprocket () is restrained and moves in response to rotation of the first sprocket () to a disengaged position in which angular motion of the second sprocket () with respect to the first sprocket () is permitted.

Torsionally compliant sprocket with locking mechanism

In chain and sprocket systems with at least two resonance modes, two or more tension reducing sprockets are oriented to cancel each other at a first resonance mode and have no effect to increase tensions at such first resonance mode. The tension reduction sprockets, however, are oriented with each other so that tensions will be reduced at a second resonance mode. Hence, two or more tension reducing sprockets are used to reduce tensions at a second resonance mode from sources outside the chain and sprocket system while minimizing tension increases at first resonance mode.

Multiple tension reducing sprockets in a chain and sprocket system

A chain guide has an elastic member and a wear face. The wear face has the elastic member captured therein. The wear face has an inside surface and an outside surface. The first surface is disposed to contact a chain. The other surface is in contact with the elastic member. Through the compliance of the wear face and the elastic member, the chain guide absorbs some degree of impacts and transverse vibrations, both of which can affect chain control, guide wear, and bracket fatigue.

Compliant chain guide with blade spring

A chain guide with Multiple Joints having a plurality of sections () with each section conjoined together via a link () is provided. Each of the plurality of sections () has a partial upper side () which forms, in part, an upper side of the chain guide. All of the partial upper side () of the plurality of sections () together form the upper side of the chain guide.

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Ithaca, NY, United States of America

Mariano S Garcia