Halliburton Energy Services, Inc.

Alexander J Schaeffer

Mukul M Agnihotri

Ravi P Nanayakkara

Daniel Patrick Carter

Matthew Hui Chong

Carl Brown

An apparatus comprising a housing having a housing throughbore extending therethrough along a central axis; a motor drive shaft disposed in the housing throughbore; a component drive shaft disposed in the housing throughbore; and an alignment coupler mechanically coupling the motor drive shaft with the component drive shaft. The alignment coupler comprises: an alignment coupler body having an alignment coupler body throughbore extending therethrough; a spherical bolt comprising a spherical first end and an elongated section extending from the spherical first end to a second end; a thermally expandable material (TEM) section; a spring section comprising one or more springs; and one or more spherical spacers. The alignment coupler enables alignment of the motor drive shaft and the component drive shaft within the apparatus during assembly of the apparatus, and heating of the TEM provides rigidity to the assembled apparatus prior to use.

Shape memory alloy shaft alignment coupler for downhole tools

A mud pulse telemetry tool includes a dampener for reducing shock and vibration. The mud pulse telemetry tool includes a housing having a shoulder formed along an inner surface thereof, the housing including an orifice formed therein. A piston assembly is longitudinally movable in the housing between a retracted position and an extended position. The piston assembly includes a poppet disposable in the orifice in the extended position and a piston connected to the poppet. The dampener is disposed longitudinally between the piston and the shoulder, the piston being movable in contact with the dampener when the piston assembly is in the extended position.

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Houston, TX, United States of America

Alexander J Schaeffer