RU2012121505A

RU2012121505A - DRILL PIPE THREADED CONNECTION

Info

Publication number: RU2012121505A
Application number: RU2012121505/03A
Authority: RU
Inventors: Леонид Артемьевич Лачинян; Наталья Леонидовна Лачинян
Original assignee: Открытое акционерное общество "Завод бурового оборудования"
Priority date: 2012-05-25
Filing date: 2012-05-25
Publication date: 2013-11-27
Also published as: RU2521123C2

Abstract

Резьбовое соединение бурильных труб, включающее муфту и ниппель, образующие при свинчивании и затяжке наружный и внутренний упорные стыки, отличающееся тем, что между упорным уступом муфты и упорным торцом ниппеля установлена прорезная пружина так, что между упорным уступом ниппеля и упорным торцом муфты образуется ликвидируемый в процессе затяжки соединения и сжатия пружины зазор, величина которого равна ходу пружины и, согласно ее параметрам, строго соответствует заданной осевой нагрузке на внутренний упорный стык, благодаря чему, после затяжки соединения, обеспечивается также строго заданная осевая нагрузка на наружный стык, как разница между задаваемой общей силой затяжки резьбового соединения и силой, создаваемой пружиной на внутренний упорный стык.A threaded connection of drill pipes, including a sleeve and a nipple, which, when screwing and tightening, forms an external and internal thrust joint, characterized in that a slotted spring is installed between the thrust shoulder of the coupling and the thrust end of the nipple so that it is formed between the thrust shoulder of the nipple and the thrust end of the sleeve the process of tightening the connection and compressing the spring, a gap whose value is equal to the spring travel and, according to its parameters, strictly corresponds to the specified axial load on the internal thrust joint, due to which after tightening the connection, a strictly defined axial load on the external joint is also provided, as the difference between the specified total tightening force of the threaded connection and the force created by the spring on the internal thrust joint.

Claims

A threaded connection of drill pipes, including a sleeve and a nipple, which, when screwing and tightening, forms an external and internal thrust joint, characterized in that a slotted spring is installed between the thrust shoulder of the coupling and the thrust end of the nipple so that it is formed between the thrust shoulder of the nipple and the thrust end of the sleeve the process of tightening the connection and compressing the spring, a gap whose value is equal to the spring travel and, according to its parameters, strictly corresponds to the specified axial load on the internal thrust joint, due to which after tightening the connection, a strictly defined axial load on the external joint is also provided, as the difference between the specified total tightening force of the threaded connection and the force created by the spring on the internal thrust joint.