49 results about "Infiltrometer" patented technology

The invention is a method of determining all the components of an absolute permeability tensor of a porous medium sample from permeability measurements, obtained for example by placing the sample in a permeameter which is useful for fast determination of permeability anisotropies of rocks and detention of internal heterogeneities. A pressure difference ΔP is applied between the inlet and outlet faces of a laboratory rock sample, with zero flow conditions on the edges parallel to the mean flow obtained by confining it in a sheath under pressure. Starting from conventional permeability measurements in three directions and from the measurements of the two components of the viscous forces transverse to the sample, a permeability tensor k can be “inverted” by numerical solution of the corresponding boundary-value problem. Since these quantities can be alternatively obtained from numerical solutions of the same flow in a heterogeneous medium, the method can also be used as an upscaling tool in a reservoir simulator.

The invention relates to a tester for seepage failure in a contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation, characterized in that: a confining pressure chamber is arranged on a pedestal; one end of an axial presser is connected with one end of an axial pressure rod, the other end of the axial pressure rod extends from the top of the confiningpressure chamber into the confining pressure chamber to contact with a sample cap, a permeable stone is arranged at the bottom of the sample cap, a sample is arranged below the permeable stone, and the sample is wrapped with a shrinkable tube closely; a confining pressure presser accesses from the bottom of the confining pressure chamber through pipes, and an osmotic pressure presser accesses from the bottom of the sample in the confining pressure chamber through pipes; one end of a first outlet pipe is connected with the sample cap, and the other end extends out of the confining pressure chamber; one end of a second outlet pipe is connected with the bottom of the sample from the bottom of the pedestal, and the other end is connected with a measuring cup below the pedestal. The tester canacquire accurate stress strain data of the sample with seepage stress coupling effect, and provides a theory basis for researching on the seepage stress coupling constitutive model of the contact surface of soil and works.

The invention discloses a comprehensive permeability testing machine for measuring vertical permeability coefficient and horizontal permeability coefficient. The invention comprises a constant-pressure water tank which is communicated with two water supply pipes, wherein, one water supply pipe is communicated with an upper pressure chamber; the top of the upper pressure chamber is provided with abarometer and an air-bleed hole and the side face of the upper pressure chamber is provided with an inflating device; the upper pressure chamber is communicated with a lower pressure chamber through an assembly member; the upper part of the lower pressure chamber is provided with a bubble exhaust hole and the lower part of the lower pressure chamber is communicated with a graduated flask through an exhaust pipe and a metered valve; the other water supply pipe is connected to the left of the assembly member; and the assembly member is communicated with the graduated flask through the exhaust pipe and the metered valve and consists of an impervious membrane, silicon rubber, a V-shaped slot board and a pressurized plastic membrane. The comprehensive permeability testing machine has the advantages that: firstly, the pressurized plastic membrane can quickly, precisely and uniformly transfer normal pressure to a sample, and the impervious membrane can prevent leakage of the sidewall; secondly, water flow is uniformly infiltrated into the V-shaped slot; thirdly, due to arrangement of the silicon rubber, the border effect is reduced; fourthly, the whole machine realizes measurement of thevertical permeability coefficient and the horizontal permeability coefficient, and is precise, simple and clean, highly efficient, practical and convenient to operate.