Delay coating for wellbore isolation device
NO20211063A1Active Publication Date: 2021-09-03BOARD OF RGT THE UNIV OF TEXAS SYST +1
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Patent Information
- Application Number
- NO20211063
- Authority / Receiving Office
- NO · NO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2019-04-05
- Filing Date
- 2021-09-03
- Publication Date
- 2021-09-03
- Estimated Expiration
- 2039-04-05
AI Technical Summary
Technical Problem
Swellable packers used for wellbore isolation can prematurely expand before reaching the intended location, causing the packer and conveyance to become stuck in the wellbore, due to unexpected delays in placement.
Method used
A degradable delay coating is applied to the swellable packer, which delays the swelling of the sealing element by preventing contact with the trigger fluid until the packer reaches the intended location, using a cross-linked polymer that degrades in wellbore fluids, allowing controlled swelling upon exposure.
Benefits of technology
The coating prevents premature swelling, ensuring the packer reaches the correct location and expands as intended, reducing the risk of the packer and conveyance becoming stuck in the wellbore.
✦ Generated by Eureka AI based on patent content.
Abstract
Abstract and drawing info chevron_right A wellbore isolation device includes a mandrel, a sealing element disposed around at least a portion of the mandrel, and a delay coating disposed on at least a portion of an outer surface of the sealing element. The sealing element includes a swellable material and the delay coating covers a cross-linked polymer. The delay coating is configured to swell or degrade in a wellbore fluid.
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