Invention Application
- Patent Title: MULTILAYERED COATING FOR DOWNHOLE TOOLS WITH ENHANCED WEAR RESISTANCE AND ACIDIC CORROSION RESISTANCE
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Application No.: US15986760Application Date: 2018-05-22
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Publication No.: US20180266002A1Publication Date: 2018-09-20
- Inventor: Jiinjen Albert Sue , Unnikrishnan C. Vasudevan , Rajagopala N. Pillai
- Applicant: National Oilwell DHT, L.P.
- Applicant Address: US TX Conroe
- Assignee: National Oilwell DHT, L.P.
- Current Assignee: National Oilwell DHT, L.P.
- Current Assignee Address: US TX Conroe
- Main IPC: C25D5/12
- IPC: C25D5/12 ; C23C18/32 ; C23C18/16 ; E21B17/10 ; C25D5/14 ; C25D5/18 ; E21B10/00 ; E21B4/02 ; C25D7/00
Abstract:
A coating for protecting a base material from wear and corrosion includes a first layer deposited directly onto an outer surface of the base material. In addition, the coating includes a second layer deposited directly onto the first layer. The first layer is positioned between the base material and the second layer. The first layer includes chromium having a first micro-crack density and the second layer comprises chromium having a second micro-crack density that is less than the first micro-crack density.
Information query
