Abstract: In one embodiment, a heat dissipating apparatus includes a chassis positionable within a housing of a downhole tool. The heat dissipating apparatus also includes a heat sink coupled to the chassis and a displacement mechanism coupled to the heat sink. The displacement mechanism is actuatable to move the heat sink, with respect to the chassis, between a first position and a second position such that in the first position the heat sink is radially retracted toward the chassis to form a gap between the heat sink and the housing and such that in the second position the heat sink is radially extended from the chassis to contact the housing.

Abstract: The present disclosure relates to heat dissipation apparatus that may be used within a downhole tool. The heat dissipation apparatus may include one or more of a cover configured to attach to a heat generating device, a thermal conduit thermally coupled to the cover, and a heat sink thermally coupled to the thermal conduit, in which the heat sink is configured to dissipate heat from the heat generating device through the cover and the thermal conduit.

Abstract: Embodiments disclosed herein relate to heat dissipating apparatus to be used with a downhole tool, including a tubular housing having an axis defined therethrough, a heat generating device disposed within the tubular housing, a heat sink disposed adjacent to the heat generating device and configured to dissipate heat from the heat generating device, and a displacement mechanism disposed within the tubular housing and configured to position the heat sink between a first position and a second position within the tubular housing in which, in the first position, a gap is formed between the heat sink and the tubular housing, and in the second position, the heat sink contacts the tubular housing.

Abstract: The present disclosure relates to heat dissipation apparatus that may be used within a downhole tool. The heat dissipation apparatus may include one or more of a cover configured to attach to a heat generating device, a thermal conduit thermally coupled to the cover, and a heat sink thermally coupled to the thermal conduit, in which the heat sink is configured to dissipate heat from the heat generating device through the cover and the thermal conduit.

Abstract: A downhole tool configured for conveyance within a wellbore extending into a subterranean formation, the tool comprising an electronics system and a heat-dissipating apparatus. The electronics system includes a controller, a memory, and surface communicating means, at least one of which is a heat-generating source. The heat-dissipating apparatus includes: a chassis engaging the heat-generating source and having a fluid passageway allowing fluid flow therethrough; a radiator for further heat dissipation; a pump; sensors to measure temperature of the chassis and the wellbore; and a compensator to regulate the pressure of fluid in the passageway.

Abstract: Apparatus and methods to dissipate heat in a downhole tool are disclosed. A disclosed example tool collar includes a body having a first outer surface, a first fluid inlet, and a first fluid outlet. The example tool collar also includes a passageway formed therethrough, a second fluid inlet to engage the first fluid outlet of the body, a second fluid outlet to engage the first fluid inlet of the body, and a first inner surface having at least one protrusion extending into the passageway.

Abstract: The present invention provides an unsymmetrical thread profile used to connect stator housings of a positive displacement motor. The unsymmetrical thread profile comprises one or more non-load bearing flanks angled with respect to the longitudinal axis of the thread profile such that the root radius is greater than the root radius of a symmetrical thread profile having substantially the same pitch and first angle.