FIELD: machine building.
SUBSTANCE: nipple or coupling of a threaded connection is lubricated using a solid lubricating coating. The protective device includes a tubular element having a threaded part on its inside or outside peripheral surface, which is engaged at least with some part of a full thread, and mainly with 3-5 turns of the full thread of the threaded part of the nipple or the coupling, which are protected by means of the above device. Height H1 of the thread in the threaded part of the protective device and height H2 of full thread of the nipple or the coupling, on which the protective device is installed, meet the following condition: H1>H2, and difference between H1 and H2 exceeds at the crest of the thread the maximum thickness of solid lubricating coating covering the threaded part of the nipple or the coupling.
EFFECT: higher reliability of the pipe threaded connection.
17 cl, 12 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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RU2569413C1 |
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|
RU2349825C1 |
| PIPE JOINT WITH WEDGE-TYPE THREAD WITH SURFACE COATING | 2010 |
|
RU2534255C2 |
| THREADED CONNECTION WITH IMPROVED ELASTIC SEAL RINGS | 2009 |
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RU2418207C2 |
| CONNECTION WITH MULTIPLICITY OF SEALS FOR VERTICAL PIPES OF IMMERSED WATER-SEPARATING STRING | 1994 |
|
RU2117133C1 |
