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Bearden unit of consistency

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Journal Articles
J Pet Technol 72 (05): 71–72.
Paper Number: SPE-0520-0071-JPT
Published: 01 May 2020
... to the fill line in the slurry cup, the cup is assembled with a paddle and capped and a thermocouple is inserted. Cement viscosity is recorded up to 100 Bearden units of consistency (Bc) at 100 and 300°F at 3,000 psi. 1 5 2020 1 5 2020 1 5 2020 1 5 2020 2019. Society of Petroleum...
Proceedings Papers

Paper presented at the SPE Kuwait Oil & Gas Show and Conference, October 15–18, 2017
Paper Number: SPE-187598-MS
... vug sizes (i.e., up to tens of millimeters). Thickening time of LCMs were observed pumpable [i.e., <70 Bearden units of consistency (B c) ], even after hours of conditioning at bottomhole circulating temperatures (BHCTs). As per API routine practice, tested slurry is deemed unpumpable if B c...
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Thickener curve of gel-plug system heated from surface temperature to 90°C ...
Published: 10 February 2021
Fig. 8 Thickener curve of gel-plug system heated from surface temperature to 90°C (5% crosslinking regulator). BC = Bearden unit of consistency. More
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Thickener curve of gel-plug system heated from surface temperature to 75°C ...
Published: 10 February 2021
Fig. 9 Thickener curve of gel-plug system heated from surface temperature to 75°C (8% crosslinking regulator). BC = Bearden unit of consistency. More
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Normalized slurry-thickening times. Note that the <span class="search-highlight">consistency</span> is normalized...
Published: 23 January 2019
Fig. 8 Normalized slurry-thickening times. Note that the consistency is normalized to zero at a conditioning time of 0.5 hours, which is the typical amount of time required for the slurry to reach temperature equilibrium. Bc = Bearden units of consistency. More
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Near right-angled set of the magnesium blocking system in a pressurised con...
Published: 21 September 2008
Figure 4 Near right-angled set of the magnesium blocking system in a pressurised consistometer test. The blue curve is the slurry consistency in Bearden units. More
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 3–6, 1993
Paper Number: SPE-26576-MS
... CEMENTS potentiometer connected to the paddle shaft. This torque is recorded as a direct current (DC) voltage across a resistor on top of the potentiometer. The actual viscosity of the cement can then be derived from a linear plot of DC volts versus viscosity in Bearden Units of Consistency (Bc)1...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference, October 26–28, 2015
Paper Number: SPE-176523-MS
... alcohol by the weight of the blend 4 9.21 3.5 5 8.3 1.26 Thickening time and flowability Thickening time is the duration between the beginning of cement preparation and when the cement attains 100 Bearden units. Bearden units of consistency (Bc) are used to express...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 26–29, 2004
Paper Number: SPE-90923-MS
... the fluidity time testing, the consistometer motor will remain off except for one 2-second period per hour. This 2-second period allows technicians to monitor the Bearden Units of Consistency (B c ) at each hour interval. This is an initial indication of the slurry condition. It is important to note that a 10...
Proceedings Papers

Paper presented at the SPE Nigeria Annual International Conference and Exhibition, August 6–8, 2018
Paper Number: SPE-193490-MS
... and thickening time tests with the equation below: N s p = q A P I ( t 100   B C − t 30   B C ) 30 where N sp = Slurry Performance Number q API = API fluid-loss value of slurry (mL/30min) t 30Bc = time to 30 Bearden units of consistency (min...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204333-MS
... the thickening time at 180 °F and 3000 psi. The pumpability or consistency of cement slurries, measured in Bearden units of consistency (Bc), a dimensionless quantity with no direct conversion factor to more common units of viscosity. The rheology of the cement slurries were measured using couette coaxial...
Proceedings Papers

Paper presented at the Nigeria Annual International Conference and Exhibition, July 31–August 7, 2010
Paper Number: SPE-136973-MS
... simulated downhole condition. The time it takes to reach a consistency of 70Bc (Bearden units of consistency) is regarded as the thickening time of the slurry. After preparing the slurry in the blender, it is poured into an API slurry cup. The slurry cup is then placed inside the HPHT Consistometer in which...
Proceedings Papers

Paper presented at the SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition, April 24–27, 2017
Paper Number: SPE-188119-MS
... and stationary cup or moving cup and stationary paddle. The paddle is connected to a spring, and as the cement start to gel it add torque on the paddle and deflects the spring. This deflection is read as current and is translated into units of consistency called Bearden Units (Bc). The thickening time test...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1992
Paper Number: OTC-7071-MS
... (Centipoise) = Fluid Average Temperature Bearden units of Consistency (dimensionless) = Constant (3.1416) = Total heat flow rate (BTU/Hr) Heat flow rate by Convection (BTU/Hr) = Heat flow rate by Conduction (BTU/Hr) Heat flow rate by Radiation (BTUlHr) Average Convective Conductance (BTU/Hr Ft2 of) Reynolds...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2002
Paper Number: OTC-14282-MS
... from this instrument are displayed on a strip chart with elapsed time on the "Y" axis and viscosity in Bearden Units of Consistency (Bc) or lbf/100 ft2, (depending on mode) on the "X" axis (see Fig.1). A second device available to the cementing industry uses ultrasonic waveform analysis to derive...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31236-MS
...-pressure/high-temperature (HP/HT) consistometers at simulated downhole curing conditions. The viscosity is reported in Bearden consistency units (Bc), and the limit of pumpability (LOP) beyond which the slurry is considered too viscous to pump is approximately 70 to 100 Bc. The time required for a cement...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204327-MS
...-modified lignosulfonates refer to lignosulfonate product obtained from sulfite pulping process. These lignosulfonates (NM-1, NM-2 and NM-3) are used without modification, but with differing counterion and/or sugar content. The thickening time refers to time taken to reach 70 Bc (Bearden units...
Proceedings Papers

Paper presented at the SPE Oklahoma City Oil and Gas Symposium, March 27–31, 2017
Paper Number: SPE-185113-MS
... at ~30 Bearden units of consistency (Bc) up to 24 hours. Fig. 2 shows a cyclical on-off thickening time test. The high spikes shown in Fig. 2 indicate the development of high gel strengths after the off period, but after it is sheared, the slurry was pumpable again with a slightly higher consistency...
Proceedings Papers

Paper presented at the CIPC/SPE Gas Technology Symposium 2008 Joint Conference, June 16–19, 2008
Paper Number: SPE-115004-MS
... Model 4262 Twin Cell Ultrasonic Cement Analyzer. The thickening times are evaluated using a pressurized consistometer at the given well conditions. The consistency of each slurry is measured in Bearden units (B c ). A Static Gel Strength Analyzer Model 5265 from Chandler Engineering with dual...

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