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Retarder for high-temperature-resistant oil well cement as well as preparation method and application of retarder
The invention discloses a retarder for high-temperature-resistant oil well cement as well as a preparation method and application of the retarder. The retarder comprises a sulfonic acid-carboxylic acid polymer, wherein the sulfonic acid-carboxylic acid polymer is generated by polymerizing unsaturated carboxylic acid monomers, 2-methyl-2-acrylamido propanesulfonic acid and ammonium salt cationic monomers in a clustering form, and the molecular chain of the sulfonic acid-carboxylic acid polymer is provided with a cationic cluster; wherein the mass ratio of the ammonium salt cationic monomer to the unsaturated carboxylic acid monomer to the 2-methyl-2-acrylamide propanesulfonic acid is 17: (19-30): (52-64). According to the retarder, ammonium salt cationic monomers are distributed in a molecular structure of a sulfonic acid-carboxylic acid polymer with cationic clusters on a molecular chain by using a cluster type distribution method, and then ethylenediamine tetra (methylene phosphonic acid) sodium with strong Ca < 2 + > chelating capacity is compounded to prepare the retarder. The prepared retarder can resist the temperature of 240 DEG C, when the adding amount of the retarder is 2%-4%, the thickening time of cement paste at 240 DEG C is 343-600 min, after a cement paste system is cured for 24 h, the compressive strength of set cement reaches 26.2 MPa or above, and the ultrahigh-temperature well cementation requirement can be met.
本发明公开一种抗高温油井水泥用缓凝剂及其制备方法和应用。该缓凝剂包含由不饱和羧酸单体、2‑甲基‑2‑丙烯酰胺基丙磺酸和铵盐类阳离子单体以集簇的形式聚合生成的分子链上带有阳离子集簇的磺酸‑羧酸聚合物；其中，铵盐类阳离子单体、不饱和羧酸单体和2‑甲基‑2‑丙烯酰胺基丙磺酸的质量比为17：(19～30)：(52～64)。本发明的缓凝剂使用集簇式分布的方法将铵盐类阳离子单体分布于分子链上带有阳离子集簇的磺酸‑羧酸聚合物的分子结构中，再复配具有强螯合Ca2+能力的乙二胺四甲叉膦酸钠来制备。本发明制备的缓凝剂耐温240℃，且当缓凝剂加量为2％～4％时，水泥浆在240℃的稠化时间在343～600min之间，水泥浆体系养护24h后水泥石抗压强度达到26.2MPa以上，可以满足超高温固井要求。
Retarder for high-temperature-resistant oil well cement as well as preparation method and application of retarder
The invention discloses a retarder for high-temperature-resistant oil well cement as well as a preparation method and application of the retarder. The retarder comprises a sulfonic acid-carboxylic acid polymer, wherein the sulfonic acid-carboxylic acid polymer is generated by polymerizing unsaturated carboxylic acid monomers, 2-methyl-2-acrylamido propanesulfonic acid and ammonium salt cationic monomers in a clustering form, and the molecular chain of the sulfonic acid-carboxylic acid polymer is provided with a cationic cluster; wherein the mass ratio of the ammonium salt cationic monomer to the unsaturated carboxylic acid monomer to the 2-methyl-2-acrylamide propanesulfonic acid is 17: (19-30): (52-64). According to the retarder, ammonium salt cationic monomers are distributed in a molecular structure of a sulfonic acid-carboxylic acid polymer with cationic clusters on a molecular chain by using a cluster type distribution method, and then ethylenediamine tetra (methylene phosphonic acid) sodium with strong Ca < 2 + > chelating capacity is compounded to prepare the retarder. The prepared retarder can resist the temperature of 240 DEG C, when the adding amount of the retarder is 2%-4%, the thickening time of cement paste at 240 DEG C is 343-600 min, after a cement paste system is cured for 24 h, the compressive strength of set cement reaches 26.2 MPa or above, and the ultrahigh-temperature well cementation requirement can be met.
本发明公开一种抗高温油井水泥用缓凝剂及其制备方法和应用。该缓凝剂包含由不饱和羧酸单体、2‑甲基‑2‑丙烯酰胺基丙磺酸和铵盐类阳离子单体以集簇的形式聚合生成的分子链上带有阳离子集簇的磺酸‑羧酸聚合物；其中，铵盐类阳离子单体、不饱和羧酸单体和2‑甲基‑2‑丙烯酰胺基丙磺酸的质量比为17：(19～30)：(52～64)。本发明的缓凝剂使用集簇式分布的方法将铵盐类阳离子单体分布于分子链上带有阳离子集簇的磺酸‑羧酸聚合物的分子结构中，再复配具有强螯合Ca2+能力的乙二胺四甲叉膦酸钠来制备。本发明制备的缓凝剂耐温240℃，且当缓凝剂加量为2％～4％时，水泥浆在240℃的稠化时间在343～600min之间，水泥浆体系养护24h后水泥石抗压强度达到26.2MPa以上，可以满足超高温固井要求。
Retarder for high-temperature-resistant oil well cement as well as preparation method and application of retarder
抗高温油井水泥用缓凝剂及其制备方法和应用
XIN YING (author) / ZHAO CHENKANG (author) / JIANG WEI (author) / ZU YU (author) / JIN SHUHAN (author) / FENG SIHAN (author) / DAI MAN (author) / GAO SHAN (author) / GUO HONGYU (author) / LI YINGHUI (author)
2024-11-26
Patent
Electronic Resource
Chinese
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C09K
Materialien für Anwendungen, soweit nicht anderweitig vorgesehen
,
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR
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