A guiding sub-section (2) of a production logging tool (1) comprises a central rigid stem (30) having a first mechanical connector (33) at one end and a second mechanical connector (34) at an another end, and carrying a roller deploying arrangement (31) comprising multiple external articulated arms (35A, 35B, 35C) circumferentially distributed about said body, each articulated arm comprising a roller assembly (32A, 32B, 32C) adapted for contact with a wall (7) of the hydrocarbon well (4) and operable from a retracted configuration into a radially extended configuration. The roller assembly (32A, 32B, 32C) comprises an arm hinge (51) coupling a first arm part and a second arm part of each articulated arm (35A, 35B and 35C) and having an arm hinge axis (AA′) substantially perpendicular to the longitudinal axis (XX′), a roller bearing (52) secured onto the arm hinge (51) and having a roller axis (BB′) angled with respect to the hinge axis (AA′), and an anti-slippage friction roller (53) received onto the roller bearing (52) in a rotation free manner.

Downhole tool is provided that includes a body, an intake port for receiving fluid from external the body, a pump, a filtration device, and an exit port. The pump is in fluid communication with the intake port for withdrawing fluid through the intake port. The filtration device has a particulate removing filter, and a flow line extending from the intake port to the filtration device. The filtration device is contained within the body and is in fluid communication with the intake port. The exit port is in fluid communication with the filtration device for ejecting the fluid to external the body.

A wireline chamber tool for dispensing and collecting fluid is disclosed. The wireline chamber tool includes a tool body having an internal chamber therein, a piston within the internal chamber that divides the internal chamber into a proximal portion and a distal portion, a circulation port disposed in the tool body, where the circulation port is configured to provide fluid communication between the distal portion and an outside of the tool, and a filling port disposed in the tool body, wherein the filling port is configured to provide fluid communication between the outside of the tool and the proximal portion.

A sensor for obtaining downhole data includes a first piezoelectric layer. The sensor also includes a second piezoelectric layer having a trench extending a depth below a surface of the second piezoelectric layer. The sensor also includes an electrode positioned within the trench. The first piezoelectric layer is directly coupled to the second piezoelectric layer.

A method includes placing a downhole acquisition tool in a wellbore in a geological formation containing a reservoir fluid. The method includes performing downhole fluid analysis using the downhole acquisition tool to determine at least one measurement of the reservoir fluid. The method includes using a processor to estimate at least one fluid component property by using an equation of state based at least in part on the at least one measurement of the reservoir fluid and to simulate a diffusion process using a diffusion model that takes into account the at least one estimated fluid property to generate a composition path. The method includes using a processor to estimate one or more phase envelopes based in part on the at least one fluid property and compare the one or more phase envelopes with the composition path. The method includes outputting a visualization identify potential areas of asphaltene instability.

A siphon pump chimney can be used in a mini-drillstem test to increase formation fluid flow rates. A formation tester can be coupled to a siphon pump chimney via a wet connect assembly to transfer formation fluid from a fluid-bearing formation. The siphon pump chimney can receive the formation fluid through the wet connect and disperse the formation fluid into a drill pipe that is flowing drilling fluid. The siphon pump chimney can include check valves to prevent the drilling fluid from entering the siphon pump chimney. The siphon pump chimney can be configured to have a variable height that can reduce pressure within the siphon pump chimney to a pressure value that can be close to or less than the formation pressure, which can allow a pump to operate at high flow rates or be bypassed in a free flow configuration.

A siphon pump chimney can be used in a mini-drillstem test to increase formation fluid flow rates. A formation tester can be coupled to a siphon pump chimney via a wet connect assembly to transfer formation fluid from a fluid-bearing formation. The siphon pump chimney can receive the formation fluid through the wet connect and disperse the formation fluid into a drill pipe that is flowing drilling fluid. The siphon pump chimney can include check valves to prevent the drilling fluid from entering the siphon pump chimney. The siphon pump chimney can be configured to have a variable height that can reduce pressure within the siphon pump chimney to a pressure value that can be close to or less than the formation pressure, which can allow a pump to operate at high flow rates or be bypassed in a free flow configuration.

The present invention relates to the use of a downhole pumping tool for removing a hydrate formation forming a hydrate plug in a tubing in a well, the downhole pumping tool comprising a pump having a pump inlet and a pump outlet, an electric motor for driving the pump, a wireline for powering the electric motor, the pump having a first end arranged closest to the wireline and a second end facing the hydrate plug, wherein the pump inlet is arranged in the second end, and the pump inlet contacts a first face of the hydrate plug, the pump providing suction to remove at least part of a plurality of gas molecules from the hydrate plug for dissolving at least part of the hydrate formation. The invention also relates to a hydrate removal method for removing hydrate formation forming a hydrate plug in a tubing.

A suspended fluid sampling and monitoring system includes a BOP, the BOP attached to a wellhead. The BOP is positioned above a wellbore. The suspended fluid sampling and monitoring system further includes a TEC, the TEC connected to a sensor package. The TEC and sensor package extend through the BOP into the wellbore. The suspended fluid sampling and monitoring system also includes a fluid sample line, the fluid sample line extending through the BOP into the wellbore. The suspended fluid sampling and monitoring system also includes a fluid sample intake and filtration device, the fluid sample intake and filtration device mechanically coupled to the fluid sample line within the wellbore.

A siphon pump chimney can be used in a mini-drillstem test to increase formation fluid flow rates. A formation tester can be coupled to a siphon pump chimney via a wet connect assembly to transfer formation fluid from a fluid-bearing formation. The siphon pump chimney can receive the formation fluid through the wet connect and disperse the formation fluid into a drill pipe that is flowing drilling fluid. The siphon pump chimney can include check valves to prevent the drilling fluid from entering the siphon pump chimney. The siphon pump chimney can be configured to have a variable height that can reduce pressure within the siphon pump chimney to a pressure value that can be close to or less than the formation pressure, which can allow a pump to operate at high flow rates or be bypassed in a free flow configuration.