Submersible core holders

Submersible core holders are used in installations for studying core samples reservoir properties at reservoir conditions.
The core holder is a cylindrical shape vessel with end caps (nuts). Plungers, flanges and rubber cuff for core placement are located inside the core holder body. Plungers and flanges have inlet and outlet ports for supplying pore fluids, ports for creating crimp pressure, as well as ports for temperature control sensors and reserve ports for filling and draining crimp volume. Delivery set can include a special tripod to work with a core holder.
Sample change in the core holder occurs with a partial discharge of hydraulic crimping fluid.
Core holders can be equipped with separate heating system including clamp heaters, temperature sensors, temperature measurement and control system with a PC connection.

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Benefits/Capabilities

Various design options for core holder plungers: connection of several fluid supply lines and individual pressure measurement lines; construction for drilling fluid supplying and filtering, including along sample end; acid resistant performance.
Resistivity measurements of samples installed in core holder.
High temperature core holder (up to +320 ° С)

Technical specifications

Tested samples diameter, mm	from 25 to 110
Tested samples length, mm	up to 1600
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
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