CONSTRUCTIVE COMPONENT FOR DRILLING AND DEVELOPMENT OF HYDROCARBON WELLS Russian patent published in 2013 - IPC F16L15/00 

FIELD: machine building.

SUBSTANCE: constructive component is of hollow form provided with the first end part which may be attached to the second end part of another constructive component. The first end part contains ending section provided with the first thrust surface capable of interaction upon tightening with corresponding thrust surface of the second end part and provided with sealing surface capable of interaction upon tightening with corresponding sealing surface of the second end part. Before this section there is a threaded section which may screwed into corresponding threaded section of the second end part. In thickness of the first ending section and partially under sealing surface there formed is compressed volume so that radial stiffness of the ending section is reduced by at least 20%, at that at least 60% of axial stiffness is preserved.

EFFECT: improving reliability of the device.

16 cl, 9 dwg