DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer(Viscometer) 6 Speeds Electric Rheometer Model RC-35D Instruction Manual

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer(Viscometer)

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer(Viscometer) 1. Introduction The 6 Speeds Electric Rheometer is a direct-reading instrument for evaluating the rheological properties of fluids, Newtonian and non-Newtonian. The advantages of the RC-35D viscometer are its digital display, pre-programmed API tests and speed range - 6 preset. This design includes a R1 Rotor Sleeve, B1 Bob, F1 Torsion Spring, and a stainless steel sample cup for testing according to American Petroleum Institute Recommended Practice for Field Testing Water Based Drilling Fluids, API RP 13B1/ISO...

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) 2. Safety Safe laboratory practices and procedures should be observed while operating and maintaining the 6 speed Rheometer. This section lists some precautions to follow. 2.1 Safe Electrical Operation This instrument is driven by 220V, 50/60 Hz electrical power. Heated sample cups and recirculating sample cups (optional) are electrically heated. Make sure the power and other wiring associated with this rheometer and electrically heated sample cups are in good condition and properly grounded. Keep hands, clothes...

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) The Model RC-35D 6 speed Rheometer comes with the standard R1 rotor sleeve, B1 bob, F1 torsion spring, and a stainless steel sample cup. Its features include the following: Preprogrammed API tests— API drilling fluid and API cement Secure fit, left-hand turn for rotor and right-hand turn for bob to help prevent disconnection when measuring high viscosity fluids Pushbutton design for easier operation Table 3-1 RC-35D Rheometer, Specifications

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) Table 3-3 Rotor-Bob Specifications

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) 4. Installation The RC-35D Rheometer should be placed where there is easy access to the power cord plug for disconnection. Bob Removal and Installation To remove or install the bob, urn the bob counterclockwise (left) to remove it and clockwise (right) to install it (righthand-threads). Consideration should be given to the location where samples are prepared and equipment is cleaned when the test is completed. There should be sufficient storage area nearby for commonly used tools, as well as consumables.

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) 5. Operation To start a test, add 350 ml of sample to the stainless steel sample cup. The sample cup has a line that marks 350 ml. A scribed line on the rotor indicates proper immersion depth. Damage to the bob shaft bearing may occur if the immersion depth is exceeded. If other sample holders are used, the space between the bottom of the rotor and the bottom of the sample holder should be one-half inch (1.27cm) or greater. This instrument is operated through a keypad (Figure 5-1). The keypad functions are summarized...

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) PIGCHINA - 5.1 Instrument Start-up Plug the power supply into a 220V, 50/60 HZ power source. Connect the power supply to rear of the rheometer. Turn on the power switch. The LED backlight will show and the following screens will appear. After a few seconds, the machine enters the operating mode. The LED backlight display lists the speed (RPM). 5.2 Manual Operating Instructions Choosing speeds Press white number keys to select preset speeds: 3, 6, 100, 200, 300 or 600 Shutting down the rheometer Turn the power switch...

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer(Viscometer) 6. Initiating sensor calibration 6.1 Deadweight or fluid calibration. (Figure 6-1)

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer)

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) Dial Range Dial Range Table 6-3 Shear Rate Measuring Range for Viscometers Rate of Revolution of Outer Cylinder, N (rpm) Shear Rate Range (sec-1), = k3N Rotor-Bob Combinations R1 B1 Table 6-4 Viscosity Range in Centipoise for RIGCHINA Direct Indicating Viscometers Viscosity (cP) (1) RIGCHINA Model All Models, 600 rpm max Minimum Viscosity (2) RC-35D 3 rpm min Maximum Viscosity(4) RC-12D 0.9 rpm min Maximum Viscosity(4)

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) Notes: 1) Computed for standard Torsion Spring (F1). For other torsion springs multiply viscosity range by f factor. 2) Minimum viscosity is computed for minimum shear stress and maximum shear rate. 3) For practical purposes the minimum viscosity is limited to 0.5 cP because of Taylor Vortices. 4) Maximum viscosity is computed for maximum shear stress and minimum shear rate. 6.2 Fluid Calibration Check From the list (Figure 5-9), press 1 to select fluid calibration. Use a 200 cp standard.

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) 7. Test Analysis This section explains how to obtain the test results, which includes reading values from the viscometer and performing calculations. The reference for measuring viscosity and performing calculations is API Recommended Practice for Field Testing Water Based Drilling Fluids, API RP 13B-1/ISO 10414-1. 7.1 Newtonian Viscosity Calculation The Newtonian viscosity in centipoise (cP) may be read directly from the dial when the viscometer speed is 300 rpm and the rotor-bob-torsion spring combination...

DRILLNG FLUID TESTING INSTRUMENTATION 6 Speed Electric Rheometer (Viscometer) Table 7-1 Rotor-Bob Factor (C) Table 7-2 Speed Factor (S) 7.2 Plastic Viscosity and Yield Point Calculation Using R1-B1-F1 combination, test a sample at 600 rpm and record the dial reading. Change the speed to 300 rpm and record the dial reading. Determine the plastic viscosity (PV) and yield point (YP) using the following equations. PV represents the slope of a straight line between the two dial readings. YP represents the theoretical point at which the straight line, when projected, will intercept the vertical...