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CN-224231578-U - Rock permeability testing arrangement

CN224231578UCN 224231578 UCN224231578 UCN 224231578UCN-224231578-U

Abstract

The utility model relates to the technical field of rock detection, in particular to a rock permeability testing device. The rock permeability testing device comprises a mounting frame, wherein a fixing assembly for containing rock samples is arranged in the mounting frame, the fixing assembly comprises two fixing half cylinders, two fixing half cylinders are symmetrically distributed, rubber sheets propped against the outer wall of the rock samples are fixedly arranged on the side walls of the fixing half cylinders, an upper sealing disc for sealing the top ends of the fixing half cylinders is arranged at the top of the fixing half cylinders, and a lower sealing disc for sealing the bottom ends of the fixing half cylinders is arranged at the bottom of the fixing half cylinders. According to the rock permeability testing device provided by the utility model, the opening position of the gas injection head can be changed according to the requirement in the testing process, so that the injection position of gas to the end part of a rock sample can be adjusted, and a worker can obtain more groups of testing data, so that the comprehensiveness of the testing data can be improved.

Inventors

  • ZHOU PENGGAO
  • LIU XIANGGUO
  • TANG JIANYUN

Assignees

  • 克拉玛依职业技术学院
  • 克拉玛依友联实业有限责任公司

Dates

Publication Date
20260512
Application Date
20260409

Claims (6)

  1. 1. The rock permeability testing device is characterized by comprising a mounting frame (1), wherein a fixing assembly (2) for containing a rock sample is arranged inside the mounting frame (1); The fixing assembly (2) comprises two fixing half cylinders (21), wherein the two fixing half cylinders (21) are symmetrically distributed, rubber sheets (212) propped against the outer wall of a rock sample are fixedly arranged on the side wall of each fixing half cylinder (21), an upper sealing disc (22) for sealing the top end of each fixing half cylinder (21) is arranged at the top of each fixing half cylinder (21), and a lower sealing disc (23) for sealing the bottom end of each fixing half cylinder (21) is arranged at the bottom of each fixing half cylinder (21); A plurality of mounting grooves (221) are formed in the top of the upper sealing disc (22), a butt joint pipe (222) is fixedly embedded in the mounting grooves (221), a communicated gas injection head (223) is fixedly arranged at the bottom end of the butt joint pipe (222), a communicated switching pipe (42) is fixedly arranged at the top end of the butt joint pipe (222), a valve (421) is fixedly arranged on the switching pipe (42), and a rubber pad propped against a rock sample is fixedly arranged at the end part of the gas injection head (223); The top of a plurality of switching pipe (42) fixed mounting has same air guide dish (4), the inside of air guide dish (4) communicates with the inside of switching pipe (42), just the top fixed mounting of air guide dish (4) have gas injection pipe (41) rather than inside intercommunication.
  2. 2. The rock permeability testing device according to claim 1, characterized in that the top of the lower sealing disc (23) is fixedly provided with a supporting frame (3), a sliding frame (32) in sliding connection is inserted on the supporting frame (3), and a supporting ring (6) for supporting a rock sample is arranged above the sliding frame (32).
  3. 3. The rock permeability testing device according to claim 2, wherein a plurality of telescopic rods (5) are fixedly installed between the supporting ring (6) and the sliding frame (32), springs (51) are sleeved outside the telescopic rods (5), the top ends of the springs (51) are fixedly connected with the bottom of the supporting ring (6), and the bottom ends of the springs (51) are fixedly connected with the top of the sliding frame (32).
  4. 4. A rock permeability testing device according to claim 3, characterized in that an adjusting rod (31) is inserted in the support frame (3) in threaded connection, and the top end of the adjusting rod (31) is rotatably connected with the inner top of the sliding frame (32).
  5. 5. The rock permeability testing device according to claim 1, wherein the lower sealing disc (23) and the upper sealing disc (22) are fixedly provided with rubber rings (24) which are abutted against the ends of the lower sealing disc and the upper sealing disc respectively, and an exhaust pipe (231) is fixedly arranged at the bottom of the lower sealing disc (23) and is provided with a pressure transmitter for measuring the internal air pressure of the exhaust pipe (231).
  6. 6. The rock permeability testing device according to claim 1, characterized in that a vertical hydraulic cylinder (25) is fixedly mounted between the lower sealing disc (23) and the upper sealing disc (22) and the mounting frame (1), and a horizontal hydraulic cylinder (211) is fixedly mounted between the fixed half cylinder (21) and the mounting frame (1).

Description

Rock permeability testing arrangement Technical Field The utility model relates to the technical field of rock detection, in particular to a rock permeability testing device. Background Permeability refers to the ability of rock to allow fluid to pass under a pressure differential. Is a parameter characterizing the ability of the earth or rock itself to conduct liquid. The size is related to the porosity, geometry of the pores in the direction of liquid penetration, particle size and alignment direction, and is independent of the nature of the liquid moving in the medium. Permeability is used to denote the magnitude of permeability. Permeability is an important index for measuring the capacity of the core to allow fluid to pass through, and directly influences the yield of oil and gas wells. The prior detection device is generally used in a mode that a rock sample column to be detected is placed in a closed detection cylinder, one end of the detection cylinder is inflated, then the detection is carried out by observing the air pressure change of the other end, and the air inflation mode only can obtain the permeability of a fixed air inlet position during detection, and the comprehensive of later detection data is reduced to a certain extent because of uneven distribution of the internal structure of the rock. Accordingly, there is a need to provide a new rock permeability testing apparatus that solves the above-mentioned technical problems. Disclosure of utility model In order to solve the technical problems, the utility model provides a rock permeability testing device. The rock permeability testing device provided by the utility model comprises a mounting frame, a testing device and a testing device, wherein a fixing assembly for holding a rock sample is arranged in the mounting frame; The fixing assembly comprises two fixing half cylinders which are symmetrically distributed, rubber sheets which are propped against the outer wall of the rock sample are fixedly arranged on the side wall of each fixing half cylinder, an upper sealing disc for sealing the top end of each fixing half cylinder is arranged at the top of each fixing half cylinder, and a lower sealing disc for sealing the bottom end of each fixing half cylinder is arranged at the bottom of each fixing half cylinder; The top of the upper sealing disc is provided with a plurality of mounting grooves, a butt joint pipe is fixedly inlaid in each mounting groove, a communicated gas injection head is fixedly arranged at the bottom end of each butt joint pipe, a communicated switching pipe is fixedly arranged at the top end of each butt joint pipe, a valve is fixedly arranged on each switching pipe, and a rubber pad propped against a rock sample is fixedly arranged at the end part of each gas injection head; The top fixed mounting of a plurality of switching pipes has same air guide plate, the inside of air guide plate communicates with the inside of switching pipe, just the top fixed mounting of air guide plate has the gas injection pipe rather than the inside intercommunication. Preferably, a supporting frame is fixedly arranged at the top of the lower sealing disc, a sliding frame in sliding connection is inserted on the supporting frame, and a supporting ring for supporting the rock sample is arranged above the sliding frame. Preferably, a plurality of telescopic rods are fixedly arranged between the supporting ring and the sliding frame, springs are sleeved outside the telescopic rods, the top ends of the springs are fixedly connected with the bottom of the supporting ring, and the bottom ends of the springs are fixedly connected with the top of the sliding frame. Preferably, an adjusting rod in threaded connection is inserted into the support frame, and the top end of the adjusting rod is rotationally connected with the inner top of the sliding frame. Preferably, the rubber rings propped against the end parts of the lower sealing disc and the upper sealing disc are fixedly arranged on one sides of the lower sealing disc and the upper sealing disc, which are close to the fixed half cylinder, an exhaust pipe is fixedly arranged at the bottom of the lower sealing disc, and a pressure transmitter for measuring the internal air pressure of the exhaust pipe is arranged on the exhaust pipe. Preferably, a vertical hydraulic cylinder is fixedly arranged between the lower sealing disc and the mounting frame, and a water hydraulic cylinder is fixedly arranged between the fixed half cylinder and the mounting frame. Compared with the related art, the rock permeability testing device provided by the utility model has the following beneficial effects: 1. According to the utility model, through the arrangement of the plurality of gas injection heads in the fixed assembly, the opening positions of the gas injection heads can be changed according to the requirements in the test process, so that the injection positions of gas to the end parts of rock samples can b