Granted Patent B2

US 12,460,121 · App. 18/005,914 · Granted Nov 4, 2025

Inventors: Hongwen Liang (Beijing, CN); Gewei Peng (Beijing, CN); Hailiang Zhang (Xiangtan, CN); Xiaojun Mo (Beijing, CN); Fan Yang (Beijing, CN); Junhua Zhang (Beijing, CN); Xu Wang (Beijing, CN); Qichun Wang (Beijing, CN); Min Zeng (Beijing, CN)

Assignee: CHINA PETROLEUM & CHEMICAL CORPORATION

C09K8/493C04B14/368C04B24/2676

Abstract

Claims (31)

1 . A composition, wherein the composition has a density of 1.2-2 g/cm 3 , a water contact angle not more than 90°, and a diesel oil and/or natural gas absorption expansion ratio of 5-15 times,

wherein the composition comprises a hydrogenated styrenic thermoplastic elastomer, a hydrophilic polymer and an inorganic filler, wherein the hydrophilic polymer is coated on the surfaces of said hydrogenated styrenic thermoplastic elastomer and said inorganic filler, a weight ratio of said hydrogenated styrenic thermoplastic elastomer to said inorganic filler is from 30:70 to 70:30:

wherein a weight ratio of the hydrogenated styrenic thermoplastic elastomer to the hydrophilic polymer is from 1:0.01 to 1:10.1, and

wherein the hydrophilic polymer contains hydrophilic functional group, which is one or more selected from the group consisting of a hydroxyl radical, an amino group and a carboxyl group.

2 . The composition of claim 1 , wherein the composition has a density of 1.4-1.8 g/cm 3 ;

and/or, the composition has a water contact angle less than 85°;

and/or, the diesel oil and/or natural gas absorption expansion ratio of 8-12 times.

3 . The composition of claim 1 , wherein the composition is a sieved material obtained after passing through 20 mesh to 200 mesh sieve.

4 . The composition of claim 1 , wherein the hydrogenated styrenic thermoplastic elastomer is one or more selected from the group consisting of hydrogenated styrene-butadiene-styrene triblock copolymer, hydrogenated styrene-isoprene-styrene triblock copolymer, and styrene-isobutylene-styrene triblock copolymer;

and/or, the hydrogenated styrenic thermoplastic elastomer has a hydrogenation degree of 95-100%.

5 . The composition of claim 1 , wherein the hydrogenated styrenic thermoplastic elastomer has a linear structure or a star structure, and the linear structure having a number average molecular weight of 40,000-150,000, the star structure having a number average molecular weight of 120,000-320,000;

and/or, the hydrogenated styrenic thermoplastic elastomer contains styrenic structural units in an amount of 20-50 wt % and 1,2-structure in an amount of 25-40 wt %, based on the weight of said hydrogenated styrenic thermoplastic elastomer.

6 . The composition of claim 1 , wherein the inorganic filler has a density of 2.5-6 g/cm 3 and a particle size of 5-20 μm;

and/or, the inorganic filler is one or more selected from the group consisting of ground calcium carbonate, barium sulfate, iron ore powder, cement, quartz sand and barite.

7 . The composition of claim 1 , wherein and/or, the content of hydrophilic functional groups in the hydrophilic polymer is 0.1-0.6 g/g polymer.

8 . A method for preparing a composition, the method comprises the following steps:

(1) uniformly mixing a hydrogenated styrenic thermoplastic elastomer with an inorganic filler to obtain a mixed material, and subjecting the mixed material to extrusion granulation under the melting conditions of said hydrogenated styrenic thermoplastic elastomer;

(2) coating the pellets obtained in step (1) with a hydrophilic polymer to obtain a granular material,

wherein a weight ratio inorganic filler to the hydrogenated styrenic thermoplastic elastomer is from 30:70 to 70:30, and a weight ratio of the hydrogenated styrenic thermoplastic elastomer to the hydrophilic polymer is from 1:0.01 to 1:10.1, and

wherein the hydrophilic polymer contains hydrophilic functional group, which is one or more selected from the group consisting of a hydroxyl radical, an amino group and a carboxyl group.

9 . The preparation method of claim 8 , wherein the hydrogenated styrenic thermoplastic elastomer is one or more selected from the group consisting of hydrogenated styrene-butadiene-styrene triblock copolymer, hydrogenated styrene-isoprene-styrene triblock copolymer, and styrene-isobutylene-styrene triblock copolymer;

and/or, the hydrogenated styrenic thermoplastic elastomer has a hydrogenation degree of 95-100%.

10 . The preparation method of claim 8 , wherein the hydrogenated styrenic thermoplastic elastomer has a linear structure or a star structure, and the linear structure having a number average molecular weight of 40,000-150,000, the star structure having a number average molecular weight of 120,000-320,000;

and/or, the hydrogenated styrenic thermoplastic elastomer contains styrenic structural units in an amount of 20-50 wt % and 1,2-structure in an amount of 25-40 wt %, based on the weight of said hydrogenated styrenic thermoplastic elastomer.

11 . The preparation method of claim 8 , wherein the inorganic filler has a density of 2.5-6 g/cm 3 , and a particle size of 5-20 μm;

and/or, the inorganic filler is one or more selected from the group consisting of ground calcium carbonate, barium sulfate, iron ore powder, cement, quartz sand and barite.

12 . The preparation method of claim 8 , wherein the content of hydrophilic functional groups in the hydrophilic polymer is 0.1-0.6 g/g polymer.

13 . The preparation method of claim 8 , wherein the coating is carried out by impregnating the pellets obtained in step (1) with a solution comprising a hydrophilic polymer and then drying the impregnated pellets.

14 . The preparation method of claim 8 , the method further comprising passing the pellets obtained by the extrusion granulation through a 20 mesh-200 mesh sieve.

15 . A cement slurry for well cementing in the oil/gas field comprising the composition of claim 1 .

16 . The cement slurry for well cementing in the oil/gas field of claim 15 , wherein the composition is contained in an amount of 5-15 wt %, based on the total amount of the cement slurry for well cementing in the oil/gas field.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (32)