A rheology device comprises an elongated body having a flow path defined therein, first and second pressure lines in communication with the first and second ends of the flow path, respectively, and a differential pressure sensor for measuring a difference in pressure between the first and second pressure lines. In embodiments, the pressure lines are filled with a spacer fluid different from the fluid in the flow path. Based on at least three measurements of difference in pressure and corresponding flow rates, a yield point, a consistency factor, and a power factor can be calculated, and a rheology model of the fluid can be generated. Related methods are described which allow fluid rheology models to be determined and updated frequently. The device and methods herein may be useful in oil and gas operations, for example for rheology and hydraulic modeling in drilling operations.

In some embodiments, a system for automatically evaluating slurry properties includes a down-hole measurement device configured to be lowered into slurry provided in an excavated hole, the measurement device comprising an outer housing, a flow pump, a flow meter, and a differential pressure sensor, wherein the flow pump is configured to pump slurry through the flow meter, the flow meter is configured to measure a flow rate of the pumped slurry, and the differential pressure sensor is configured to measure a difference in pressure between the pumped slurry and the slurry outside of the measurement device.

In some embodiments, a system for automatically evaluating slurry properties includes a down-hole measurement device configured to be lowered into slurry provided in an excavated hole, the measurement device comprising an outer housing, a flow pump, a flow meter, and a differential pressure sensor, wherein the flow pump is configured to pump slurry through the flow meter, the flow meter is configured to measure a flow rate of the pumped slurry, and the differential pressure sensor is configured to measure a difference in pressure between the pumped slurry and the slurry outside of the measurement device.

A viscometer includes a viscosity sensor with a liquid flow channel and at least two pressure sensors positioned along the liquid flow channel and configured to measure a pressure drop of a liquid flowing through the liquid flow channel, and a dispensing mechanism configured to cause dispensing of a liquid from the syringe to the viscosity sensor at a known flow rate. The dispensing mechanism and the viscosity sensor are configured to couple with a syringe configured to contain a liquid. The viscometer further includes an electronic controller configured to control operations of the dispensing mechanism and receive and process data from the viscosity sensor. The viscometer includes a sample loading interface, included in the syringe, through which the viscometer is configured to receive the liquid. The sample loading interface includes a selection valve coupled with, and located between, the viscosity sensor and the syringe.

A viscometer includes a viscosity sensor with a liquid flow channel and at least two pressure sensors positioned along the liquid flow channel and configured to measure a pressure drop of a liquid flowing through the liquid flow channel, and a dispensing mechanism configured to cause dispensing of a liquid from the syringe to the viscosity sensor at a known flow rate. The dispensing mechanism and the viscosity sensor are configured to couple with a syringe configured to contain a liquid. The viscometer further includes an electronic controller configured to control operations of the dispensing mechanism and receive and process data from the viscosity sensor. The viscometer includes a sample loading interface, included in the syringe, through which the viscometer is configured to receive the liquid. The sample loading interface includes a selection valve coupled with, and located between, the viscosity sensor and the syringe.

The present disclosure provides methods and devices for sample extraction.

The present disclosure provides methods and devices for sample extraction.

Provided is a device for measuring a gas concentration, including: a preheating module configured to preheat and rectify an input to-be-measured gas to output a first stage gas; a differential pressure conversion module connected to the preheating module, wherein the differential pressure conversion module is configured to allow the first stage gas flowing through to generate a differential pressure change value; and a processing module configured to acquire a volume concentration of the to-be-measured gas according to the differential pressure change value; wherein the differential pressure conversion module comprises a capillary laminar flow unit having a plurality of capillaries, and flow channels of the plurality of capillaries become a main channel of a gas flow, so as to form a laminar flow structure. A method for measuring a gas concentration is further provided, including measuring a concentration of a to-be-measured gas using the above-mentioned device for measuring a gas concentration.

Provided is a device for measuring a gas concentration, including: a preheating module configured to preheat and rectify an input to-be-measured gas to output a first stage gas; a differential pressure conversion module connected to the preheating module, wherein the differential pressure conversion module is configured to allow the first stage gas flowing through to generate a differential pressure change value; and a processing module configured to acquire a volume concentration of the to-be-measured gas according to the differential pressure change value; wherein the differential pressure conversion module comprises a capillary laminar flow unit having a plurality of capillaries, and flow channels of the plurality of capillaries become a main channel of a gas flow, so as to form a laminar flow structure. A method for measuring a gas concentration is further provided, including measuring a concentration of a to-be-measured gas using the above-mentioned device for measuring a gas concentration.

A viscometer includes a viscosity sensor with a liquid flow channel and at least two pressure sensors positioned along the liquid flow channel and configured to measure a pressure drop of a liquid flowing through the liquid flow channel, and a dispensing mechanism configured to cause dispensing of a liquid from the syringe to the viscosity sensor at a known flow rate. The dispensing mechanism and the viscosity sensor are configured to couple with a syringe configured to contain a liquid. The viscometer further includes an electronic controller configured to control operations of the dispensing mechanism and receive and process data from the viscosity sensor. The viscometer includes a sample loading interface, included in the syringe, through which the viscometer is configured to receive the liquid. The sample loading interface includes a selection valve coupled with, and located between, the viscosity sensor and the syringe.