Well cementing method using high temperature cementing compositions专利检索-水泥添加剂水泥水硬性胶凝材料粘合剂建筑材料专利检索查询-专利查询网

Well cementing method using high temperature cementing compositions

阅读：925发布：2023-05-05

专利汇可以提供Well cementing method using high temperature cementing compositions专利检索，专利查询，专利分析的服务。并且This specification discloses additives for retarding the setting time of cement compositions at high temperatures which are basically comprised of mixtures of a lignosulfonic acid salt and a pentaboric acid salt, novel cement compositions containing the additives and methods of cementing high temperature well formations employing the cement compositions.，下面是Well cementing method using high temperature cementing compositions专利的具体信息内容。

权利要求

2. The method of claim 1 wherein the mixture of the lignosulfonic acid salt and borate compound is present in the cement slurry in an amount of from about 0.1 percent to about 10 percent based on the weight of dry cement.

3. The method of claim 2 wherein the lignosulfonic acid salt is selected from calcium lignosulfonate, magNesium lignosulfonate, barium lignosulfonate, sodium lignosulfonate, potassium lignosulfonate and lithium lignosulfonate.

4. The method of claim 3 wherein the borate compound is selected from calcium pentaborate, magnesium pentaborate, barium pentaborate, sodium pentaborate, potassium pentaborate and lithium pentaborate.

5. The method of claim 2 wherein the lignosulfonic acid salt is calcium lignosulfonate.

6. The method of claim 5 wherein the borate compound is potassium pentaborate.

7. The method of claim 6 wherein the cement composition is further characterized to include in said additive a gluconic compound selected from gluconic acid, gluconic acid delta lactone, an alkali metal gluconate, and an alkaline earth metal gluconate, said gluconic compound being present in the mixture in an amount of from about 0.2 to about 1 part by weight per 1 part by weight of calcium lignosulfonate.

8. The method of claim 7 wherein the gluconic compound is selected from gluconic acid, gluconic acid delta lactone, sodium gluconate, potassium gluconate, lithium gluconate, calcium gluconate, magnesium gluconate and barium gluconate.

9. The method of claim 8 wherein the gluconic compound is gluconic acid delta lactone.

说明书全文

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