Sealing ring sealing-assisting material and application thereof

Abstract

The invention discloses a sealing ring sealing-assisting material which is composed of the following components in parts by mass: 30-100 parts of hydraulic oil; 0-5 parts of an oily thickening agent; 5-25 parts of a water swelling agent; and 10-30 parts of a proppant. The invention also discloses an application of the sealing ring sealing aid material as a sealing ring sealing aid in oil exploitation. Aiming at the defects of improving the sealing performance of a sealing ring of a hydraulic layered packer in a common way (improving the material of the sealing ring and increasing the number of the sealing ring) at present, the problem after the sealing ring fails is solved by improving hydraulic oil, the sealing effect is improved, and the service life of the packer is prolonged.

Claims

1. A sealing ring sealing material, characterized in that: In parts by mass, it is composed of the following components: 30-100 parts of hydraulic oil; 0-5 parts of oily thickener; 5-25 parts of water-swelling agent; 10-30 parts proppant.

2. A sealing ring sealing aid material as claimed in claim 1, characterized in that: The viscosity grade of the hydraulic oil is one of 10, 15, 22, 32, 46, 68, 100, and 150.

3. A sealing ring sealing aid material as claimed in claim 1, characterized in that: The amount of hydraulic oil used is 40-80 parts, preferably 45-60 parts.

4. A sealing ring sealing aid material as claimed in claim 1, characterized in that: The oily thickener is one or more of oil-soluble stearates containing two or three long stearic acid chains, long-chain fatty acid glycerides, and olefin polymers.

5. A sealing ring sealing aid material as claimed in claim 4, characterized in that: The olefin polymer is one or more of polystyrene, polyethylene and polypropylene.

6. A sealing ring sealing aid material as claimed in claim 4, characterized in that: The long-chain fatty acid glyceride is a C12-C24 long-chain fatty acid glyceride, preferably stearic acid glyceride.

7. A sealing ring sealing aid material as claimed in claim 1, characterized in that: The water-swelling agent is one or more of polyacrylamide, modified starch and modified cellulose.

8. The sealing ring sealing material according to claim 1, characterized in that: The particle size of the water-swelling agent is less than 0.5 mm.

9. A sealing ring sealing aid material as claimed in claim 1, characterized in that: The proppant is short fiber or partially hydrolyzed acrylic fiber.

10. A sealing ring sealing aid material as claimed in claim 9, characterized in that: The short fibers are one or more of cotton short fibers and wool short fibers.

11. A sealing ring sealing aid material as claimed in claim 9, characterized in that: The partially hydrolyzed acrylic yarn is an alkaline partially hydrolyzed acrylic yarn with a hydrolysis degree of 10%-50%, preferably an alkaline partially hydrolyzed acrylic yarn with a hydrolysis degree of 20%-40%, and more preferably an alkaline partially hydrolyzed acrylic yarn with a hydrolysis degree of 25%-35%.

12. Use of the sealing ring sealing aid material according to any one of claims 1 to 11 as a sealing ring sealing aid in petroleum production.

13. The use according to claim 12, characterized in that The specific steps of the application are as follows: (1) Add a formula amount of hydraulic oil and a formula amount of oily thickener into a reaction container and stir evenly, then add a formula amount of water-swelling agent and a formula amount of proppant and stir evenly to obtain a sealing ring auxiliary sealing material; (2) First, inject hydraulic oil to displace the water in the pipeline, and then inject the sealing ring auxiliary sealing material into the hydraulic control switch.

14. The use according to claim 13, characterized in that The injection amount of the sealing ring auxiliary sealing material is 101%-120% of the total capacity of the hydraulic control pipeline where the hydraulic control switch is located.