This paper presents the design and test results of a new pulsating casing collar which improves cementing quality. The new pulsating casing collar (PCC) is designed according to the Helmholtz oscillator to generate a pulsating jet flow by self-excitation in the cementing process. By placing this new pulsating casing collar at the bottom of casing string, the generated pulsating jet flow transmits vibrating pressure waves up through the annulus and helps remove drilling mud in the annulus. It can therefore improve cementing quality, especially when eccentric annulus exists due to casing eccentricity where the mud is difficult to remove. The new pulsating casing collar consists of a top nozzle, a resonant chamber, and a bottom nozzle. It can be manufactured easily and is easy to use in the field. It has been tested in Jianghan oil-field, P.R. China. The field-test results support the theoretical analysis and laboratory test, and the cementing quality is shown greatly improved by using the new pulsating casing collar.
New pulsating casing collar to improve cementing quality
1998
Seiten
Conference paper
Storage medium
English
White-Collar Productivity and quality Issues
TIBKAT | 1984
ROLLED COLLAR, ROLLED COLLAR MANUFACTURING APPARATUS, AND ROLLED COLLAR MANUFACTURING METHOD
European Patent Office | 2017
|WINDING COLLAR, WINDING COLLAR PRODUCTION DEVICE, AND WINDING COLLAR PRODUCTION METHOD
European Patent Office | 2019
|WINDING COLLAR WINDING COLLAR PRODUCTION DEVICE AND WINDING COLLAR PRODUCTION
European Patent Office | 2018
WINDING COLLAR, WINDING COLLAR PRODUCTION DEVICE, AND WINDING COLLAR PRODUCTION METHOD
European Patent Office | 2015
|