A measuring device for pore throat pressure of Jamin effect based on mechanochromic materials is provided and includes: a bubble pressurization part, configured to inject bubbles into a microscopic visualization test part; the microscopic visualization test part including a mechanochromic material and a pore throat structure, configured to characterize changes of pore throat pressure during bubble injection; a waste liquid recycling part, configured to recycle bubble waste liquid passing through the microscopic visualization test part; a data acquisition and analysis part, configured to acquire changing data of the pore throat pressure in the microscopic visualization test part and analyze the changing data to obtain the pore throat pressure. The device is simple in structure and easy to operate, and provides a method for measuring an internal surface pressure of an object. The method can realize a real time measurement of the pore throat pressure of Jamin effect.

A method for determining a rock property includes positioning a core sample in a core sample assembly that is enclosed in a pressurized container with a flow inlet, a flow outlet, and a pressurized fluid inlet fluidly coupled to a pressurized fluid reservoir that includes a pressurized fluid pump; sequentially performing at least three test operations on the core sample; at each of the at least three test operations, measuring an inlet pressure at the flow inlet, measuring an outlet pressure at the flow outlet, and measuring a confining pressure within the pressurized container; and determining a permeability of the core sample based at least in part on at least one of the measured inlet pressures, at least one of the measured outlet pressures, and at least one of the measured confining pressures.

The disclosure includes a new test method of evaluating lost circulation prevention with expandable geopolymers. The expandable geopolymer is tested using a permeability plugging tester, slot disk, drilling fluid, and a piston to determine how much fluid is released from the test cell.

A triaxial test apparatus for measuring eroded soil particles under action of seepage force includes a constant-flow seepage system, a soil particle transport grading measurement system, a large-range volume pressure control vacuum system and a data processing and analyzing system, where the constant-flow seepage system is connected to the soil particle transport grading measurement system and the large-range volume pressure control vacuum system by means of pipelines separately, the data processing and analyzing system includes a data acquisition device and a computer, the constant-flow seepage system, the soil particle transport grading measurement system and the large-range volume pressure control vacuum system are connected to the data acquisition device by means of lines separately, and the computer is connected to the data acquisition device by means of a line.

The present disclosure relates to a system for determining the shut-down temperature and melt-down temperature of a separator. The system includes a jig having a through-hole, a heating unit, a temperature sensor, a controlling unit and an air permeability-determining unit. In this manner, it is possible to provide a novel system for determining the shut-down temperature and melt-down temperature of a separator by using the air permeability (Gurly value) of the separator.

Disclosed are a testing system and method under fluid-solid coupling effects. A dynamic stress field during fluid flow, deformation of a porous rock framework, real-time evolution of the stress field and deformation of a fluid-solid interface under fluid-solid coupling effects can be obtained, on the basis of a collected photo-elastic stripe image and a surface deformation image. A stress field of a solid framework and fluid in porous rock, and a strain field of the solid framework and the fluid-solid interface under fluid-solid coupling effects can be visually and quantitatively displayed by means of a display device.

A syringe or other vessel having a substrate surface coated by PECVD is provided. The PECVD coating is made by generating plasma from a gaseous reactant comprising an organosilicon precursor and optionally O.sub.2. The lubricity, hydrophobicity and/or barrier properties of the coating are set by setting the ratio of the O.sub.2 to the organosilicon precursor in the gaseous reactant, and/or by setting the electric power used for generating the plasma. In particular, a lubricity coating made by said method is provided. Vessels coated by said method and the use of such vessels protecting a compound or composition contained or received in said coated vessel against mechanical and/or chemical effects of the surface of the uncoated vessel material are also provided.

Estimating permeability enhancement of a subterranean formation due to presence of an oxidizer in a fracturing fluid, including determining kerogen volume percent in the subterranean formation and estimating fractured kerogen porosity, wherein the fractured kerogen porosity is associated with presence of the oxidizer. The technique includes determining an increase in connected porosity in the subterranean formation correlative with the kerogen vol % and the fractured kerogen porosity.

The present disclosure provides a supergravity simulation system for in-situ stress field and seepage field for deep earth engineering, comprising: a triaxial pressure chamber for placing a model and providing in-situ axial pressure, confining pressure and seepage field of deep earth structure; a simulation control device for providing pressure liquid and pore water to the triaxial pressure chamber to generate the aforementioned axial pressure, confining pressure and seepage field, and controlling the values of the axial pressure, confining pressure and seepage field; a signal acquisition device for monitoring the deformation and seepage process of the model during the test. The invention improves the similarity, reliability, and accuracy of the simulation test, and it can output pressure with an accuracy of 1% or constitute the pore water pressure difference with an accuracy of 1% to the triaxial pressure chamber through the command of the control unit.

An in-situ hydraulic jet exploiting device and method of a low-permeability natural gas hydrate reservoir. The device includes a high-pressure reaction kettle configured for formation, fracturing and exploiting of a hydrate, a stable-pressure gas supply module configured to adjust and control a gas flow rate, a constant-speed constant-pressure liquid supply module configured to control a liquid flow rate or keep liquid injection pressure constant, a thermostatic water bath configured to provide a constant-temperature environment for a device system, a back-pressure module configured to automatically control an exploiting rate or exploiting pressure, an in-situ hydraulic jet permeability enhancement module, a data collection and processing module configured to collect and process basic system parameters, and a pipeline connecting various components.