Invention Grant
- Patent Title: Threaded joint for an oil well pipe
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Application No.: US16692231Application Date: 2019-11-22
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Publication No.: US11359303B2Publication Date: 2022-06-14
- Inventor: Diego Dell'erba , Gaston Mazzaferro , Juan Carlos Gonzalez
- Applicant: Tenaris Connections B.V.
- Applicant Address: NL Amsterdam
- Assignee: Tenaris Connections B.V.
- Current Assignee: Tenaris Connections B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Knobbe Martens Olson & Bear, LLP
- Priority: NL2012288 20140219
- Main IPC: E21B17/042
- IPC: E21B17/042 ; C09D5/08 ; C25D13/04 ; F16L58/18 ; C23F11/10 ; C25D13/20 ; C25D13/22

Abstract:
Oil well pipe component comprising a threaded portion, at least part whereof is coated with a layer of a corrosion-inhibiting material, that has been applied to at least the part of the threaded portion of the oil well pipe component by means of a method comprising a cataphoresis step from an aqueous bath, said method comprising providing the oil well pipe component comprising a threaded portion; immersing at least part of the threaded portion of the pipe component in a cataphoresis bath comprising water and suspended particles of corrosion-inhibiting material, and provided with an anode and a cathode means, the pipe component being connected to the cathode means; inducing a current through the bath, in order to provide the corrosion-inhibiting material with a positive charge; depositing a layer of the positively charged corrosion-inhibiting material onto the pipe component; and removing the immersed part of the pipe component with the layer of corrosion-inhibiting material from the cataphoresis bath and allowing the corrosion-inhibiting material to set.
Public/Granted literature
- US20200157700A1 THREADED JOINT FOR AN OIL WELL PIPE Public/Granted day:2020-05-21
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