Southwest Research Institute

Hypro Corporation

Other

Schlumberger Technology Corporation

Edgar C Schroeder

Thomas E Owen

C Richard Gerlach

James Minto

Martin H Sorrells

A vibration source () includes an armature bar () having a major length dimension, and a driver (A) positioned about the armature bar. The driver (A) is movably coupled to the armature bar (), and includes an electromagnet (). During operation the electromagnet () is activated such that the driver (A) moves with respect to the armature bar () and a vibratory signal is generated in the armature bar. A described method for generating a vibratory signal in an object includes positioning the vibration source () in an opening of the object, coupling the armature bar () to a surface of the object within the opening, and activating the electromagnet () of the driver (A) such that the driver moves with respect to the armature bar () and a vibratory signal is generated in the armature bar and the object.

Seismic wave generation systems and methods for cased wells

A positive displacement pump especially designed for home use comprises a crankcase housing and a cylinder block joined thereto, the cylinder block containing a cylindrical bore whose longitudinal axis is at a predetermined angle relative to the longitudinal axis of the pump's drive shaft journaled in the crankcase housing. A piston having a central longitudinal bore formed inward from one end thereof and which includes a timing window extending through its side surface, is fitted into the cylindrical bore and coupled to the drive shaft by a pin which is journaled in a spherical bearing. A suction port is formed through the wall of the cylinder block on one side surface thereof and on the opposite side surface, 180.degree. away, is a high pressure discharge port. When the pump is driven, the piston both rotates and reciprocates causing the timing window in the piston to sweep by the inlet or suction port where a charge of liquid at low pressure is allowed to enter the hollow piston. As the piston rotates, the timing window moves to a point where it is ultimately in line with the discharge port when the piston is at a top dead center position. By canting the pin of the piston relative to its longitudinal axis compensation for the unequal hydraulic forces acting in the transverse direction on the piston results. An improved lubrication system incorporating grease as the lubricant is also employed.

Positive displacement pump with rotating reciprocating piston and

Positive displacement pump with rotating reciprocating piston

A spark discharge acoustic pulse transducer for borehole operation provides an insulating ceramic barrier which contains a small cross-section aperture separating two bodies of electrolyte through which the two zones of liquid make contact. An electrical arc discharge is caused to occur through the aperture to produce a transient pressure pulse and associated acoustic pulse which is coupled to the geologic formation at the borehole wall. The specific shape and geometry of the aperture channel in the insulating barrier being exponentially shaped provides a means for controlling the waveform and frequency spectrum of the acoustic pulse. The transducer has an elastic outer housing and an elastic inner housing with hydraulic fluid between the inner and outer housings. The pressure of the hydraulic fluid may be increased to expand the outer housing against a borehold prior to a spark discharge. The transducer is also provided with a system for venting gas produced as a result of the spark discharge. The transducer is designed to produce asymmetrical forces on the borehole wall in the azimuthal plane about the discharge chamber axis.

Asymmetrical lateral-force seismic source transducer

An electrodeless spark discharge acoustic pulse transducer for borehold operations provides an insulating ceramic barrier which contains a small cross-section aperture separating two bodies of electrolyte through which the two zones of liquid make contact. The specific shape and geometry of the insulating barrier being exponentially shaped provides a means for controlling the waveform and frequency spectrum of the acoustic pulse. The transducer has an elastic outer housing and an elastic inner housing with hydraulic fluid between the inner and outer housings. The pressure of the hydraulic fluid may be increased to expand the outer housing against a borehole prior to a spark discharge. The transducer is also provided with a system for venting gas produced as a result of the spark discharge.

Growing community of inventors

San Antonio, TX, United States of America

Edgar C Schroeder