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NAR -Triaxial Cells 驱替系统


This package contains two triaxial cells as follows;

A- PEEK Traixial cell for 1” (25.4mm) core samples.
B- PEEK Triaxial cell for 5.0mm core samples.
 
The major items included in this quotation will be as follows:
 
  • Two triaxial core golders as describe below.
  • Digital control high pressure gradient pump for pore fluid flow.
  • Digital control high pressure gradient pump for confining fluid.
  • Manual high pressure hydraulic pump for applied axial force.
  • Heating fluid circulation bath.
  • Electronic control back pressure regulator.
 
The above items represents the controlling equipment that will operate a closed high pressure and temperature system which will be able to maintain specific pressure and temperature as specified for each triaxial below.
 
These components will be connected to each other to make up the system and will be suitable for laboratory bench type operation and connected to the PEEK core holder by high pressure tubing.
 
A- PEEK Triaxial Cell for 1” Core Sample Testing;
 
Due to the fact that the design pressure for this core holder is 3000psi, the calculations indicate the minimum requirement for a 92.0mm outside diameter core holder body.
 
Shell material specification is as follows:
 
  • Density-------------------------1.4
  • Hardness----------------------124
  • Tensile strength as per ASTM------19000psi
  • Tensile strength at yield------------27000 psi
  • Compressive strength---------------25000psi
  • Compressive modulas--------------550000psi
  • Sheer strength----------------14000 psi
  • Temperature limit-----------245 degree C.
  • Composition-------High tensile carbon fiber 30% with 70% PEEK.

Design Details for the 1” Core Holder is as Follows
 
  • Shell design pressure--------------3000psi (20.6MPa).
  • Test pressure of the shell after completion--------3750psi (25.8MPa).
  • Internal diameter of the cell-------------------35.0mm (1.37”).
  • Core size diameter to be used---------------------25.4mm (1”)
  • Length of core test sample maximum to be 50.4mm (2”).
  • Viton sleeve to be 25.4mm ID. X 3.0mm wall thickness and length to suit. External surface of the Viton sleeve to be ground finish.
  • End caps to be 316 stainless steel, and will be knurled for hand opening and closing.
  • End caps threading will be deep cut Stub Acme threads.
  • Seals to be Viton.
  • Tubing to be Super duplex 3/8” Swagelok.
  • Superduplex tubing will be connected though one end cap to a PEEK piston (Platen) that will allow a differential pressure against the core sample during testing, hence the tubing can move in and out to allow for minor core length variation.
  • Design and manufacture a support stand for the core holder to support the core holder in a vertical position. The support stand will be 316 stainless steel. If the core holder position in the CT scanner require a horizontal support, please advise accordingly.
B-PEEK Triaxial Cell for 5.0mm Core Sample Testing (Slim Triaxial);
 
Shell material specification is as follows:
 
  • Density-------------------------1.4
  • Hardness----------------------124
  • Tensile strength as per ASTM------19000psi
  • Tensile strength at yield------------27000 psi
  • Compressive strength---------------25000psi
  • Compressive modulas--------------550000psi
  • Sheer strength----------------14000 psi
  • Temperature limit-----------245 degree C.
  • Composition-------High tensile carbon fiber 30% with 70% PEEK.

Design Details for the 5.0mm Core Holder is as Follows:
 
  • Distance between platens; 50mm.
  • Body, 30% carbon filled PEEK polymer.
  • Length of carbon filled PEEK tube; 180+/-mm.
  • Tube OD at core sample location; 15mm. +/-
  • Tube inside diameter; 8.00mm. +/-
  • Design pressure of the PEEK cell; 30MPa (4350psi)
  • Internal tubing will be; 1/8” superduplex.
  • PEEK cell end connection; Split 316 stainless steel base connected to an intermediate section and a secondary top end piece which will be threaded for connecting the pore and confining pressure fittings.
  • Support stand; 316 Stainless steel for a vertical support of the cell.
  • Sleeve; Heat shrink or other suitable material.
  • Platens; Superduplex fitted to the 1/8”tubing.
  • Hydraulic piston for longitudinal axial force application.
  • Holding bolts; High tensile socket head bolts.
  • Seals; Wetted part seals will be either PTFE or Viton.
  • Method of attaching split end caps; Cone design
  •  Working temperature, 0 to 150 degree C.

System Equipment:
 
1- High pressure pump No.1;
 
This pump will be used for the pore fluid flow through the rock sample.
 
The digital pump provides the necessary flow rates and pressure control function that will be suited to this application.
 
The pump is designed to have minimal pulsation as it has a built in pulsation dampener.
 
A microprocessor controls the motor drive circuits and interfaces with the chemical resistant keypad and digital LED display.
 
The pump receive the signals through the microprocessor for control of the flow rate and provides RS-232 communication.
 
Pressure control feature provides real time pressure monitoring with upper and lower pressure limits.
 
Other features include prime/purge valves for easy fluid change and priming capabilities, auto flush piston wash, run/stop inputs, and dual voltage capabilities.

The pump specification is as follows;
 
  • Wetted parts, 316 stainless head. Synthetic ruby and sapphire check valve. Fluorocarbon pulse dampener.
  • Maximum pressure, 4000psi
  • Minimum flow rate 0.1ml/min.
  • Maximum flow rate, 100ml/min.
  • Power, 220 VAC, 50/60Hz
  • Repeatability, +0.5%
  • Duty cycle, continuous operation.
  • Maximum operating temp., 100 degree C.


2- High Pressure Pump No.2;
 
This pump will be used for the pore fluid flow through the rock sample.
 
The digital pump provides the necessary flow rates and pressure control function that will be suited to this application.
 
The pump is designed to have minimal pulsation as it has a built in pulsation dampener.
 
A microprocessor controls the motor drive circuits and interfaces with the chemical resistant keypad and digital LED display.
 
The pump receive the signals through the microprocessor for control of the flow rate and provides RS-232 communication.
 
Pressure control feature provides real time pressure monitoring with upper and lower pressure limits.
 
Other features include prime/purge valves for easy fluid change and priming capabilities, auto flush piston wash, run/stop inputs, and dual voltage capabilities.
 
The pump specification is as follows;
 
  • Wetted parts, 316 stainless head. Synthetic ruby and sapphire check valve. Fluorocarbon pulse dampener.
  • Maximum pressure, 6000psi
  • Minimum flow rate 0.1ml/min.
  • Maximum flow rate, 12ml/min.
  • Power, 220 VAC, 50/60Hz
  • Repeatability, +0.5%
  • Duty cycle, continuous operation.
  • Maximum operating temp., 80 degree C.

3- High Pressure Pump No.3;
 
This pump will be used for the axial force applied on the core sample for the slim 5.0mm triaxial PEEK cell only.
This will be a manually operated pump with the following specification:
 
  • Hydraulic pump with handle.
  • Maximum pressure, 10000psi
  • Two stage operation stages 1 and 2 to reduce the torque at high pressure.
  • Integral 4-way value for double acting operation.
  • Integral pressure relief value for pressure relief protection.

4- Heating circulation bath;
 
The heating circulator unit equipped with stainless steel tanks is suitable for both internal and external temperature control. The unit exhibit a multi-display (LED) for actual and set point values, warning/safety functions and pump stage keypad set points.
PID2 temperature control with draft compensation ACT3 3-point calibration.
Also features early warning system for low liquid level.
Adjustable high temperature cut-out, visible display.
RS232 interface for online communication.

The unit specification is as follows;
 
  • Working temperature, 20 to 200 degree C.
  • Temperature stability, +/-0.0 degree C.
  • Temperature display, LED
  • Heating capacity, 2 Kw.
  • Pump capacity flow rate, 11-16 l/min.
  • Filling volume , 4 litre.
  • Digital interface, RS232

5- Electronic back pressure regulator;
 
This is a precision type dome loaded back pressure regulator with the capability for signal set point on demand. It is electronically controlled allowing for very accurate controlling of the system pressure.
 
The BPR has the ability for control from 0 to 5000psi. The dome loaded design allows for a manually set up system and later switching to electronic pressure control.
 
Other components of the system will include stainless steel tubing, fittings, high pressure PTFE flexible tubing to connect to the core holder and a three deck trolley for housing of the equipment involved.
 
Deliverables for the triaxial cells system will be as follows;
 
  • Core holder for 1”core sample testing, PEEK shell with special stainless steel threading end caps for maximum pressure operation of 3000psi (20.6MPa). Outside diameter of the core holder will be 92.0mm (3.62”).
  • Core holder for 5.0mm core sample testing, PEEK shell with split stainless steel end caps for maximum pressure operation of 4350psi (30.0MPa). Outside diameter of the core holder will be 15.0mm (0.59”).
  • Supply of pressure relief valves, one for each cell set at 5% above design pressure.
  • Testing of the core holder will be by a third party and test certificate will be issued for test pressure at 1.25 times the design pressure of the cells.
  • Core holder will be stamped indicating the design pressure. The stamping will be placed on the end caps.
  • End caps will have 1/8” NPT threaded holes for pore fluid inlet and outlet and 1/8” NPT holes for confining hydraulic fluid inlet and outlet and 1/8” NPT thread for the 5.0mm core holder axial pressure ports.
  • Supply all necessary Swagelok fittings, valves etc as required.
  • Supply extruded holding trolley with lockable casters for placing the three pumps, the heating circulator and other equipment.
  • Supply and install flexible high pressure tubing where necessary.
  • Precision, electronic high pressure circulation pump for the pore pressure.
  • Precision, electronic high pressure circulation pump for the confining pressure.
  • Manually operated hydraulic pump for applied axial force for the 5.0mm core holder.
  • Electronic heating circulation bath unit to electronically control the silicone oil for the pore fluid.
  • Submerged heating coil for heating of the pore fluid.
  • Electronic control back pressure regulator.

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