NEW TYPE CEMENTING FRONT FLUID HQ-1 AND ITS APPLICATIONS

From cementing front fluid HQ-1, a washing fluid can be transformed by mixing it with water and a spacer fluid can be prepared by weighting it with mud weighting materials. The cementing practices in 144 wells have shown that the cementing up to standard rate was 100% and the cementing super quality rate was 82.6%, the later one was raised up by 6.6% by use of it. The derived washing fluid can get in turbulent flow even at a low shear rate and provide a very good washing effect on pipe and borehole wall without thickening reaction when it mixes with drilling fluid. The prepared spacer fluid has a good isolating and displacing effects but no negative influence on cement slurry so that a good cementing quality was guaranteed. A prosperous future of its extensive applications shows up.