Reciprocating cement slurries after placement
The construction industry routinely vibrates concrete slurries to improve the quality of the set concrete. Several attempts have been made to adapt this technology to well cementing. Casing has been vibrated in contact with well cement slurries in the laboratory and in full-scale tests. Large-scale hydraulic equipment has been constructed to support and vibrate the casing string directly. The method described in this paper uses very simple and inexpensive equipment to introduce pulses of compressed air or water directly into the annulus above the slurry. The annulus serves as a wave guide to transmit pressure pulses efficiently through the slurry deep in the well. The objective of reciprocating, or vibrating, the slurry is to improve the bond between the casing and cement by preventing the influx of gas into the cement slurry before it sets.
- OSTI ID:
- 536502
- Journal Information:
- JPT, Journal of Petroleum Technology, Vol. 49, Issue 8; Other Information: PBD: Aug 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
New pulsating casing collar to improve cementing quality
Parametric study of gas entry into cemented wellbores