Oil-well metal pipe
OwnerKoji AKIOKA, Tomoya MATSUYAMA +2inventors
InventorsKoji AKIOKA, Tomoya MATSUYAMA, Takao KURANISHI, Ikuro YAMAOKA
Life of this patent
Estimating the term…
Abstract
An oil-well metal pipe according to the present disclosure includes a pipe body including a first end portion and a second end portion. The pipe body includes a pin formed on the first end portion and a box formed on the second end portion. The pin includes a pin contact surface including an external thread part. The box includes a box contact surface including an internal thread part. The oil-well metal pipe further includes a resin coating formed as an uppermost layer on the pin contact surface and/or on the box contact surface. The resin coating contains epoxy resin and organic carboxylic acid.
Claims8
An oil-well metal pipe, comprising
- a pipe body that includes a first end portion and a second end portion, wherein
- the pipe body includes:
- a pin that is formed at the first end portion;
- and
- a box that is formed at the second end portion,
- the pin includes a pin contact surface that includes an external thread part,
- the box includes a box contact surface that includes an internal thread part,
- the oil-well metal pipe further comprises
- a resin coating formed as an uppermost layer on the pin contact surface and/or on the box contact surface, and
- the resin coating contains:
- epoxy resin;
- and
- organic carboxylic acid.
Dependencies are inferred from the claim text.