QUISEAL Pressure-Activated Wellbore Repair is a rapid repair technology for downhole tubulars. It consists of a special fluid made from carrier fluid, short-chain polymers, monomers, and polymerization initiators, with hydrated short-chain polymers as the key active units. The solid components include monomers and polymers that crosslink under polymerization activators. The sealing fluid is a unique emulsion with dispersed phase particles featuring reactive cores. When the inert shell of these particles breaks under external pressure, they react and stack within micro-leak pathways, achieving rapid in-situ sealing to ensure complete wellbore integrity.

Technical Features

• Excellent stability, long-term filling of the wellbore without settling.

• Does not form large solid masses, ensuring wellbore safety.

• Repairs can be conducted by filling areas around the leakage without pinpointing their exact location.

• No need for drilling plugs; simple wellbore cleaning and non-corrosive.

• Post-sealing, it withstands acid and alkali corrosion, and has a compressive strength of up to 20MPa.

Field Application
This sealing technology has been applied by CNOOC, demonstrating excellent sealing efficiency against tubing string gas leaks into the annulus. Without compromising the structural integrity of the tubulars, the sealant is easy to pump through the casing annulus and back into thread crevices, providing rapid and effective gas sealing.

Complementary Product: QUISEAL Pressure Activator

Product Description
QUISEAL Pressure Differential Activated Sealant is a special fluid composed of carrier fluid, short-chain polymers, monomers, and polymerization initiators. Hydrated short-chain polymers act as crucial active components. The sealing fluid is a specialized emulsion, with dispersed phase particles featuring reactive cores that break down under external influence to react and stack within micro-leak pathways, achieving rapid in-situ sealing and quick integrity restoration.

Product Features

• Excellent stability for long-term wellbore filling without settling.

• Does not form large solid masses, ensuring wellbore safety.

• Enables repair by filling the leaking section without pinpointing the precise leak location.

• No need for drilling plugs; simple cleaning and non-corrosive.

• Post-sealing resistance to acid/alkali corrosion with compressive strength up to 20MPa.

Application Scope

• Maximum applicable temperature: 150℃.

• Suitable for: casing thread leaks and micro-crack leaks in downhole tools.