Abstract: The electrical submersible pump (ESP) is currently the fastest growing artificial-lift pumping technology. Deployed across 15 to 20 percent of oil-wells worldwide, ESPs are an efficient and reliable option at high production volumes and greater depths. However, ESP performance is often observed to decline gradually and reach the point of service interruption due to factors like high gas volumes, high temperature, and corrosion. The financial impact of ESP failure is substantial, from both lost production and replacement costs. Therefore, ESP performance in extensively monitored, and numerous workflows exist to suggest actions in case of break-downs. However, such workflows are reactive in nature, i.e., action is taken after tripping or failure. Therefore, a data-driven analytical framework is proposed to advance towards a proactive approach to ESP health monitoring based on predictive analytics to detect impending problems, diagnose their cause, and prescribe preventive action.

Abstract: The electrical submersible pump (ESP) is currently the fastest growing artificial-lift pumping technology. Deployed across 15 to 20 percent of oil-wells worldwide, ESPs are an efficient and reliable option at high production volumes and greater depths. However, ESP performance is often observed to decline gradually and reach the point of service interruption due to factors like high gas volumes, high temperature, and corrosion. The financial impact of ESP failure is substantial, from both lost production and replacement costs. Therefore, ESP performance in extensively monitored, and numerous workflows exist to suggest actions in case of break-downs. However, such workflows are reactive in nature, i.e., action is taken after tripping or failure. Therefore, a data-driven analytical framework is proposed to advance towards a proactive approach to ESP health monitoring based on predictive analytics to detect impending problems, diagnose their cause, and prescribe preventive action.

Abstract: Described herein is an inner tube for a core barrel which has a structure adapted to retain lubricant for lubricating a sampled core. In one embodiment, the internal surface of the inner tube includes a plurality of alveoli in which lubricant is retained.

Abstract: An adjustable hole cleaning device is provided for cleaning a hole in a subterranean formation. A drillstring containing the device is rotated to drill a hole through the subterranean formation. While rotating the drillstring, drilling fluid is circulated through the drillstring and the device into the hole. In response to an increase in a hydrostatic pressure of the fluid in the drillstring, cleaning elements are extended from the device to clean accumulated cuttings from the drilled hole. The cleaning elements may clean the accumulated cuttings by agitating the circulating fluid in the hole. In response to a decrease in a hydrostatic pressure of the fluid in the drillstring, the cleaning elements may be retracted back into the device. The device may also include a set of ports which hydraulically open in response to the increase of hydrostatic pressure in the drillstring to disperse drilling fluid into the hole for cleaning accumulated cuttings.

Abstract: A packer for a subterranean oil and/or gas well. The packer has a control signal bypass passage incorporated in the packer body. The control signal bypass passage may be opened and closed via reeled tubing to selectively allow and disallow passage of a control signal through the packer. The packer supports an electric submersible pump for enhancing flow of well fluids. The control signal bypass passage of the packer connects with a control line from the surface and with a separate control line extending downhole from the packer in the well. The control line, downhole from the packer, connects with a safety valve operable by control signal passed from the surface, through the packer, and downhole through the control signal bypass passage of the packer.