Expanding Cement Research And Application

In the oil and gas well completion operation, the ordinary Portland cement exists high self-shrinkage and dehydration in hydration and hardening process, which can cause the weak bonding between the cement sheath and the formation, casing. It will affect the well cement job quality. Therefore, a kind of BXP-1 crystal growth inflation material was chosen, joined to the anti-high temperature latex-cement slurry system, which can keep the stable volume expansion in the cement different hydration stage(plastic state saturated coagulation later period) .For having good adaptability, compatibility and the inflation time coordination, used in deep oil and gas well cementing process, improve the capacity of channeling anti-gas and cement quality. Through experiments on different volume expanders to join the slurry flows, free liquid, water loss, thickening time, rheology, compressive strength, cement intensity, penetration, impact resistance, cement volume changes and anti-gas Channeling such as evaluation, optimization expanders the optimal amount of the increase. Application of the scene, the expansion of slurry performance parameters of the scene data and laboratory data obtained withVDL test, the two cemented a good interface, the cementing of good quality.