Invention Grant
- Patent Title: Polymer system for fluid loss control
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Application No.: US16402639Application Date: 2019-05-03
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Publication No.: US10907083B2Publication Date: 2021-02-02
- Inventor: Meng Lu , Ping Huang , Wei Wan
- Applicant: CNPC USA CORPORATION
- Applicant Address: US TX Houston
- Assignee: CNPC USA CORPORATION
- Current Assignee: CNPC USA CORPORATION
- Current Assignee Address: US TX Houston
- Agency: Ramey & Schwaller, LLP
- Agent William P. Ramey; Melissa D. Schwaller
- Main IPC: C09K8/12
- IPC: C09K8/12 ; C08L33/26 ; C08L41/00 ; C09K8/035 ; C09K8/508 ; C09K8/512
Abstract:
A combination of three polymers including a crosslinked acrylamide-TBAS copolymers in inverse emulsion form, N-vinyl pyrrolidone-acrylamide-TBAS terpolymer, and crosslinked N-vinyl pyrrolidone-acrylamide-TBAS acts as high temperature, high pressure fluid loss control additives for water-based drilling fluids systems. The combination is particularly useful for high salt, high density drilling fluids, and high temperature applications.
Public/Granted literature
- US20190256759A1 POLYMER SYSTEM FOR FLUID LOSS CONTROL Public/Granted day:2019-08-22
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