Apparatus and methods to perform downhole measurements associated with subterranean formation evaluation

A system for testing a subterranean formation penetrated by a well, comprising:

• a downhole tool comprising a tool body having at least one aperture configured to receive at least one module;
• a plurality of modules each configured to be received by the at least one aperture and having at least one cavity configured to receive a probe;
• a plurality of probes each having at least one orifice configured for testing the formation, wherein a first of the plurality of probes has a first configuration and a second of the plurality of probes has a second configuration, and wherein the first probe comprises a drawdown piston slideably engaged with the at least one orifice and a sensor configured to measure the pressure at the probe orifice;
• a motor disposed in the downhole tool;
• an actuation chamber fluidly coupled to at least one extendable probe;
• and
• a motor piston slideably engaged with the actuation chamber and kinetically coupled to the motor.

A system, comprising:

• a downhole tool comprising a tool body having a plurality of apertures;
• a plurality of modules each configured to be received by a corresponding one of the plurality of apertures and having at least one cavity configured to receive a probe, wherein a first cavity of a first one of the plurality of modules is oriented towards a first direction and a second cavity of a second one of the plurality of modules is oriented towards a second direction that is substantially opposite from the first direction;
• a plurality of probes each having at least one orifice configured for testing the formation, wherein a first one of the plurality of probes has a first configuration and a second one of the plurality of probes has a second configuration that is different from the first configuration, and wherein the first one of the plurality of probes comprises a drawdown piston slideably engaged with the probe orifice and a sensor for measuring the pressure at the probe orifice;
• a sensor configured to measure the position of the drawdown piston relative to the first probe, the sensor including at least one of a potentiometer and a linear encoder;
• a valve for regulating the position of the drawdown piston relative to the first probe;
• a pulse width modulator controller coupled to the valve;
• a tool controller communicably coupled to the sensor and the pulse width modulator controller;
• a motor disposed in the downhole tool;
• an actuation chamber fluidly coupled to at least one extendable one of the plurality of probes;
• and
• a motor piston slideably engaged with the actuation chamber and kinetically coupled to the motor.