Abstract: A fluid sampling probe may include one or more features that increase the likelihood that a seal will be maintained during a sampling operation, even for sampling operations in unconsolidated formations. This may reduce contamination in formation fluid samples that are obtained during sampling operations. The fluid sampling probe may include a reinforcement ring configured to extend into a geological formation beyond an elastomer portion of the fluid sampling probe, which may support the geological formation and prevent a failure of the formation during sampling operations. The fluid sampling probe may also include a stop sleeve to prevent overextension that could otherwise cause the geological formation to collapse. In addition, the fluid sampling probe may include a relatively wider sealing elastomer that may decrease in height monotonically radially from the center of the fluid sampling probe.

Abstract: A fluid sampling probe may include one or more features that increase the likelihood that a seal will be maintained during a sampling operation, even for sampling operations in unconsolidated formations. This may reduce contamination in formation fluid samples that are obtained during sampling operations. The fluid sampling probe may include a reinforcement ring configured to extend into a geological formation beyond an elastomer portion of the fluid sampling probe, which may support the geological formation and prevent a failure of the formation during sampling operations. The fluid sampling probe may also include a stop sleeve to prevent overextension that could otherwise cause the geological formation to collapse. In addition, the fluid sampling probe may include a relatively wider sealing elastomer that may decrease in height monotonically radially from the center of the fluid sampling probe.

Abstract: The present disclosure relates to systems and methods for determining an integrity of a sample chamber. In certain embodiments, formation fluid is collected from a subterranean formation within a sample chamber disposed in a downhole tool, the downhole tool is withdrawn from a wellbore, an estimated surface pressure of the collected formation fluid is determined, the estimated surface pressure of the collected formation fluid is compared with an actual surface pressure of the sample chamber, and the integrity of the sample chamber is determined based on the comparison of the estimated surface pressure and the actual surface pressure.

Abstract: The present disclosure relates to systems and methods for determining an integrity of a sample chamber. In certain embodiments, formation fluid is collected from a subterranean formation within a sample chamber disposed in a downhole tool, the downhole tool is withdrawn from a wellbore, an estimated surface pressure of the collected formation fluid is determined, the estimated surface pressure of the collected formation fluid is compared with an actual surface pressure of the sample chamber, and the integrity of the sample chamber is determined based on the comparison of the estimated surface pressure and the actual surface pressure.

Abstract: A coupling device (11) and method of assembly, the device being of the type including a plenum member (17) disposed at one axial end of the coupling housing (13,15), the method comprising configuring the plenum member (17) such that each of the required features (55,57,61,66) is disposed circumferentially between an adjacent pair of fastener holes (18H). Next, the input ring gear (R) is installed about the housing (13,15) of the coupling device (11), from an axial end opposite said plenum member (17), into assembly position adjacent said flange portion (18). Each of a plurality (N) of fasteners (89) is inserted through one of the fastener holes (18H) and into initial threaded engagement with the input ring gear (R). Finally, by means of a fastener driver, all of the plurality (N) of fasteners (89) are driven into full threaded engagement, substantially simultaneously, with the input ring gear (R).

Abstract: A coupling device (11) and method of assembly, the device being of the type including a plenum member (17) disposed at one axial end of the coupling housing (13,15), the method comprising configuring the plenum member (17) such that each of the required features (55,57,61,66) is disposed circumferentially between an adjacent pair of fastener holes (18H). Next, the input ring gear (R) is installed about the housing (13,15) of the coupling device (11), from an axial end opposite said plenum member (17), into assembly position adjacent said flange portion (18). Each of a plurality (N) of fasteners (89) is inserted through one of the fastener holes (18H) and into initial threaded engagement with the input ring gear (R). Finally, by means of a fastener driver, all of the plurality (N) of fasteners (89) are driven into full threaded engagement, substantially simultaneously, with the input ring gear (R).

Abstract: A method of controlling a pressure control valve assembly (69) to control a control pressure (43,71) in a system (11) including a source (47,49) of pressurized fluid. The control valve assembly is operable to vary the control pressure in response to variations in an electrical input signal (87) to an electromagnetic coil (81). The control valve assembly defines an inlet (77) in communication with the control pressure, an outlet (93) in communication with the low pressure, and a valve seat (89) disposed intermediate the inlet (77) and the outlet (93). A poppet valve member (91) is biased toward the valve seat by a biasing means including an armature (95), the biasing force being generally proportional to the input signal to the coil. The method comprises the steps of selecting a predetermined, minimum pressure for the control pressure corresponding to a minimum condition of the system.