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发明公开
CN101967371A 抗高温油井水泥缓凝剂及其制备方法 有权

抗高温油井水泥缓凝剂及其制备方法
摘要：
本发明公开了一种抗高温油井水泥缓凝剂，属于油井固井技术，主要解决了现有技术中油井固井效果差的问题。该缓凝剂包括AMPS、IA、AM和DMAPAA，质量比为82～91∶10～26∶8～30∶31～38。同时，本发明还提供了一种该缓凝剂的制备方法，其步骤包括：(1)按照质量比82～91∶10～26∶8～30∶31～38分别称取AMPS、IA、AM和DMAPAA，并置于水中溶解；(2)调节步骤(1)中溶液的pH值至4～7；(3)将溶液置于烧瓶中，进行恒温水浴；(4)向溶液中逐步滴加引发剂，持续反应2～4小时后，得到最终产物。本发明能在实现延缓水泥浆的水化反应的同时，降低对水泥浆其他性能的影响。
摘要（英）：

The invention discloses a high temperature resistant oil well cement retarder, belonging to the oil well cementing technology, which mainly solves the problem of poor oil well cementing effect in the prior art. The retarder comprises AMPS, IA, AM and DMAPAA the mass ratio of which is 82-91:10-26:8-30:31-38. Meanwhile, the invention further provides a preparation method of the retarder, comprising the following steps: (1) weighing the AMPS, the IA, the AM and the DMAPAA respectively based on the mass ratio of 82-91:10-26:8-30:31-38, and dissolving the weighed materials in water; (2) adjusting the PH value of the solution obtained in step (1) to 4-7; (3) putting the solution in a flask for thermostatic water bath; and (4) adding an initiator dropwise to the solution and continuously reacting for 2-4h to obtain the final product. In the invention, hydration of cement paste can be delayed and influence on other performances of the cement paste is reduced.

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