FIELD: threaded connections for pipes.
SUBSTANCE: method for manufacturing a threaded connection for pipes is also described. The threaded connection for pipes comprises a nipple (3), a sleeve (4) and a metallized layer (100) made of Zn-Ni alloy. The nipple (3) comprises a contact surface (34) containing a part (31) with an external thread. The sleeve (4) comprises a contact surface (44) containing a part (41) with an internal thread. The metallized layer (100) of the Zn-Ni alloy is located on at least one surface of the contact surface of the nipple (34) and the contact surface (44) of the sleeve. The metallized layer (100) of the Zn-Ni alloy comprises graphite.
EFFECT: invention has excellent galling resistance and can prevent loosening when used in a horizontal wellbore.
10 cl, 12 dwg, 1 tbl
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|---|---|---|---|
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|
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