| 摘要 |
<p>A cementing material with controlled curing time, for use in the primary and secondary cementing of deep hot oil wells with a static background temperature in the range of 120-200 °C, comprising a) a resin consisting of ortho-, meta- and/or para-diallyl phthalates and/or prepolymers and/or oligomers thereof; b) a curing agent in the form of a dissolved organic peroxide generating free radicals; and, c) an inhibitor for stabilizing free radicals so as to obtain the required open time for pumping the resin in place, and optionally the following: d) one or more heavy weight filler(s) for controlling the density of the cement; e) extender materials controlling the consistency, and f) materials compensating inherent shrinkage.</p> |
