Apparatus and a method are provided for bringing a well-fluid sample in a well through a sampling device which is in fluid communication with the apparatus. The apparatus includes: a dump chamber for receiving the well-fluid sample; a first hydraulic piston arranged in a first cylinder housing; a second hydraulic piston arranged in a second cylinder housing; a piston rod for mechanically connecting the first piston to the second piston to form a piston arrangement, the dump chamber being defined by the first piston and a portion of the first cylinder housing. The apparatus further includes at least one holding device arranged to switch between an active position, in which the piston arrangement is held fixed against movement, and an inactive position, in which the piston arrangement is allowed a movement relative to the cylinder housings.

A system and method for evaluating a wellbore involves drawing fluid from a surrounding formation into an isolated portion of the wellbore, collecting the fluid in the isolated portion, and directing the sampled fluid to surge tanks on surface through a string of coiled tubing. The system and method includes measuring fluid properties, such as density and viscosity; and observing fluid flow characteristics, such as the fluid pressure, the fluid flowrate, and changes in the fluid flowrate. Based on the measured fluid properties and observed characteristics a determination is made if the wellbore is a candidate for a drill stem test.

A tubular defines a central flow passage. A camera has an aperture and attached to an outer surface of the tubular with the aperture oriented away from the outer surface of the tubular. A lost circulation media reservoir is circumferentially surrounding at least a portion of the outer surface of the tubular. The lost circulation media reservoir is adjacent to the camera. The lost circulation media reservoir includes actuable gates along a periphery of the lost circulation media reservoir. A trigger is communicably coupled with the actuable gates and configured to actuate the actuable gates.

An in-well type sampling system including a sampling chamber actuable to receive a fluid sample and a pressure source coupled to the sampling chamber to supply pressure to the sampling chamber after the sampling chamber actuating. A pressure sensor is provided in communication with the pressure source to measure the pressure of the pressure source. A telemetry communicator is coupled to the pressure sensor to send a signal from the pressure sensor away from the sampling system.

Apparatus and a method are provided for bringing a well-fluid sample in a well through a sampling device which is in fluid communication with the apparatus. The apparatus includes: a dump chamber for receiving the well-fluid sample; a first hydraulic piston arranged in a first cylinder housing; a second hydraulic piston arranged in a second cylinder housing; a piston rod for mechanically connecting the first piston to the second piston to form a piston arrangement, the dump chamber being defined by the first piston and a portion of the first cylinder housing. The apparatus further includes at least one holding device arranged to switch between an active position, in which the piston arrangement is held fixed against movement, and an inactive position, in which the piston arrangement is allowed a movement relative to the cylinder housings.

Monitoring system for a well stream from at least one hydrocarbon well with seawater injection, wherein the monitoring system is connectable to a well stream sample point for receiving a sample of the well stream, wherein the monitoring system comprises a sample receiving system, a sample preparation system and an analysing system;—wherein the sample receiving system comprises:—a fluid conduit connectable for fluid communication with the well stream sample point and—a separator for separating a water fraction from a well stream sample;—wherein the sample preparation system comprises a filter for filtering the separated water fraction; and—wherein the analysing system comprises an x-ray fluorescence analyser for measurement of the concentration of at least one of the following dissolved elements Fe, Ba, Ca, S, Cl, P, Cu, Zn, Pb, Br or scale inhibitor tracers in the filtered water sample; wherein the monitoring system comprises at least one of the following pressure control and measurement systems: a first a pressure control and measurement system connected to the sample receiving system, a second pressure control and measurement system connected to the sample preparation system.

Apparatus and a method are provided for bringing a well-fluid sample in a well through a sampling device which is in fluid communication with the apparatus. The apparatus includes: a dump chamber for receiving the well-fluid sample; a first hydraulic piston arranged in a first cylinder housing; a second hydraulic piston arranged in a second cylinder housing; a piston rod for mechanically connecting the first piston to the second piston to form a piston arrangement, the dump chamber being defined by the first piston and a portion of the first cylinder housing. The apparatus further includes at least one holding device arranged to switch between an active position, in which the piston arrangement is held fixed against movement, and an inactive position, in which the piston arrangement is allowed a movement relative to the cylinder housings.

Apparatus and methods for assessing contamination of formation fluid. A downhole sampling tool is operated to draw fluid from a subterranean formation into a chamber of the downhole sampling tool. The downhole sampling tool is then operated to discharge the fluid from the chamber while monitoring pressure of the fluid and volume of the chamber. Contamination of the discharged fluid is assessed based on the monitored fluid pressure and the monitored chamber volume.

An integrated apparatus for precisely and synchronously controlling amounts of discharged hydraulic oil and fluid using a motor, includes a housing. A movable dual-piston extractor, a motor and a plunger pump are configured in the housing and sequentially connected. A hydraulic pipeline and a fluid pipeline are connected with the housing to control flows of hydraulic oil and a fluid. A specified amount of fluid sample can be precisely extracted by precisely controlling, according to a control circuit, the number of rotations of the motor, which is indirectly reflected to a travel distance of the lead screw. A motor indirectly drives a lead screw, a nut and a piston to move linearly along a hydraulic chamber through mechanisms including a transmission shaft, and according to a position where the transmission shaft of the motor rotates, the displacement distance of the piston can be measured precisely.

A sampling tool includes a tubular member and a sampling piston positioned within the tubular member. The sampling piston has a bore formed axially-therethrough. A secondary piston is positioned within the bore of the sampling piston. A check valve assembly is positioned at least partially within the tubular member. The secondary piston and the check valve assembly move together with respect to the tubular member.