Novosibirsk, Akademgorodok
Musy Dzhalilya, 23
Personal account
Equipment for research of core,
reservoir fluids and fracturing materials
+7 (383) 332-17-47

“Dry” type core holders (Hassler)

Dry-type core holders or Hassler core holders are used in installations for studying core samples reservoir properties at reservoir conditions.
Cylindrical core sample is installed in the cuff of core holder body. Space between body and cuff is filled with hydraulic fluid. Pressure generated in core holder body is transmitted through the cuff, creating core sample radial compression. Hydraulic jack creates axial compression. Hydraulic jack working area is equal to core sample sectional area, thus uniform (triaxial) compression is created.

Sample change in the core holder occurs without hydraulic fluid crimping draining.

Core holders are equipped with special plungers through which samples pore pressure and pore fluids supply and filtration are created.
Core holders can be equipped with a separate heating system including clamp heaters, temperature sensors, temperature measurement and control system with a PC connection.

Request product cost
  • Various design options for core holder plungers: connection of several fluid supply lines and individual pressure measurement lines; plungers for measuring samples electrical resistance; construction for drilling fluid supplying and filtering, including along the sample end; acid resistant performance; built-in ultrasonic wave transmitters; acid resistant performance.
  • Resistivity measurements of samples installed in core holder using 4-electrode circuit
  • High temperature core holder (up to +320 ° С)
  • Installation of several pressure measurement ports along the core samples column (pressure drops removal from cylindrical samples side surface)
Technical specifications
Tested samples diameter, mm up 25 to 110
Tested samples length, mm up to 1000
Sample crimp pressure, MPa up to 100 (other values ​​on request)
Pore ​​pressure, MPa up to 70
Maximum working temperature, °С up to +320 (standard version +150)
Measuring electrical resistance scheme 2/4-electrode
Cuff Viton
Fluid-contact parts material stainless steel / titanium / acid resistant alloy (Hastelloy) / Viton
Connection types NPT/Autoclave/HIP
Working positions horizontally / vertically / at any angle
Working substance • water with salinity up to 300 g / l
• oil
• gas
• acids solutions, HCL-14%, HF-5%, acetic acid – 0.2%
• drilling mud filtrates