HTHP Differential Sticking Tester
 Model HDST-02
15Pages

DRILLNG FLUID TESTING INSTRUMENTATION Differential Sticking Tester HTHP Differential Sticking Tester Model HDST-02 Instruction Manual …Quality is Everything... Email: service@rigchina.com SKYPE:RIGCHINA Website: http://www.rigchina.com Telephone: 0086-579-87537698 Fax: 0086-579-8753 696 Address: No.80-82, Qiude Road, West Cheng Industrial Estate, Yongkang city, Zhejiang P

DRILLNG FLUID TESTING INSTRUMENTATION Differential Sticking Tester ©2014 Rigchina Group Company All rights reserved. No part of this work covered by the copyright hereon may be reproduced or copied in any form or by any means (graphic, electronic, or mechanical) without first receiving the written permission of Rigc

DRILLNG FLUID TESTING INSTRUMENTATION Differential Sticking Tester 1. Introduction The Differential Sticking Tester measures the “Stuck Pipe Tendency Coefficient” of drilling fluids, and also determines how effective lubricants or treatments might be with any given drilling fluid. This coefficient takes into account both the friction, or “stickiness”, of the filter cake, as well as the amount of cake building that must occur in order to freeze or stick the pipe in the hole. The coefficient is determined by running a Timed Filtration test. By measuring the area of cake building during...

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer Nitrogen must be supplied in an approved Nitrogen Gas Cylinder and secured to meet safety standards. Do not use nitrous oxide cartridges as pressure sources. Due to the high pressures involved in this test, extreme care must be exercised at all times. All safety precautions must be met, especially in the cell breakdown procedure after the filtration procedure has been completed. Before pressuring, always check to be sure the regulator is in a closed position by ensuring the T-screw is backed out and free turning. Insert and...

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer 3. Features and Specifications Table 3-1 Model 500CT HPHT Filter Press Maximum Temperature Maximum Pressure Flat Bottomed Torque Plate Sample Cell Volume Filtering Area Heating Capacity Pressure Connection Nitrogen or Carbon Dioxide Power Requirement

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer Bleeder Valve Backpressure Receiver Backpressure Hose (source) Valve Stem Test Cell Heating Jacket Flat Bottomed Torque Plate Pressure Hose (source) Pressure Valve Pressure Valve Pressure Cylinder Assembly Thermostat Assembly Valve Needle HP Primary & LP Secondary Manifold (Regulator)

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer 4.1 Place a sheet of heavy-duty filter paper, locking mesh (if used), rubber gasket, and plastic ring inside the cell. NOTE: The locking mesh will lock the drilling fluid cake to the paper so that it cannot invalidate the test results by sticking to the torque plate face and breaking loose from the filter paper Fig 4.2 4.2 Holding the gaskets centered, screw the hold-down retainer ring over the gaskets. Use the ring wrench, and tighten securely. 4.3 Insert the threaded end of one valve stem into the bottom center hole of the...

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer 5. Operation 5.1 Connect the power cord to the proper line voltage as indicated on the nameplate. 5.2. Turn the thermostat to near mid-scale. 5.3. Place a metal stem dial thermometer in the thermometer well of the heating jacket. 5.4. The pilot light will turn on when the heating jacket temperature has reached the thermostat setting. The time required to heat the sample to the test temperature will be between one half and one hour, depending on the desired test temperature. The temperature of the cell should be checked by...

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer 5.13. Turn the regulator T-handle counter-clockwise until the pressure gauge reads 0. Once the T-handle turns freely, open the bleeder valve. 5.13. Remove the top valve stem and the low valve stem. Remove the pressure valve and the pressure cylinder assembly. 5.14. Allow the torque plate to stick in the down position for 10 minutes. 5.15. Place the torque wrench and socket on the hex top of the torque plate stem.Place the lever arm horizontally between the two support legs. 5.16. Measure the torque by rotating the torque plate...

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer 6. Calcuations and Theory of Measurement 6.1 Theory Bulk Sticking Coefficient (Ksc) Derivation: The Bulk Sticking Coefficient (Ksc) is the ratio of the force necessary to initiate sliding of the plate (Fs) to the normal force on the plate (Fn). Where: Tu = Average of readings from Torque Wrench (inch-pounds) r = Radius of Plate (inches) h = Height above flat surface of cake around the edge of the plate (inches) P = Cell Pressure (PSI), differential (inlet to outlet) Fs = Sliding force Fn = Normal force on plate Ksc = Bulk...

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer Ignoring Edge Effects: = 1.5 Tu / πPr3 For a standard pressure of 477.5 PSI (3,292 kPa): Ksc = 1.5 Tu / 1,500 r3 = .001 × Tu / r3 And for r = 1": Ksc = .001 × Tu Taking into account Edge Effects: Ksc = Fs / Fn = (1.5 Tu / r) / (πPr2 + 4/3πrhP) = (1.5Tu) / [πPr2 × (r + 4/3h)] For a standard pressure of 477.5 PSI (3,292 kPa) and r = 1": Ksc = (1.5 × Tu) / [1,500 × (1 + 4/3h)] Ksc = (.001 × Tu) / (1 + 1.33h) The Stuck Tendency Coefficient (Kst) is equal to the Bulk Sticking Coefficient (Ksc) multiplied by the variable stuck area....

DRILLNG FLUID TESTING INSTRUMENTATION RheoVADR™ Rheometer (smoothed dome area) is measured at 2.00" (50.8 cm) diameter, which gives a radius of 1.0" (2.54 cm). Therefore, (using inch dimensions): Ksc = (.001 × 39.3) / (1.0)3 = 0.0393 A. Using the spherical torque plate and inch dimensions: Average Torque Wrench Reading = For a standard pressure of 477.5 PSI (3,292 ): Kst = (Average Torque Wrench Reading) × .001 =( B. Using the spherical torque plate and 477.5 PSI (3,292 kPa) and inch dimensions: For cake with less than 1" stuck radius: Average Torque Wrench Reading Measured Stuck...