RU2011119953A

RU2011119953A - THREADED PIPE CONNECTION

Info

Publication number: RU2011119953A
Application number: RU2011119953/03A
Authority: RU
Inventors: Леонид Артемьевич Лачинян
Original assignee: Открытое акционерное общество "Завод бурового оборудования"
Priority date: 2011-05-19
Filing date: 2011-05-19
Publication date: 2012-11-27
Also published as: RU2518702C2

Abstract

1. Резьбовое соединение труб, содержащее две детали - ниппель и муфту, образующие наружный упорный стык и имеющие выполненную по винтовой линии резьбы с нерабочей стороны ее профиля выемку с постоянной шириной и максимальной глубиной в начале первого к стыку витка, отличающееся тем, что ширина m основания, образующегося при выполнении выемки выступа, прилегающего к рабочей стороне профиля резьбы, определяется выражениемm=S·к/π·D,где S- площадь опасного сечения детали резьбового соединения;к- коэффициент, учитывающий долю осевой силы затяжки соединения, приходящуюся на ближайший к упорному стыку виток резьбы;D - средний диаметр резьбы детали соединения.2. Резьбовое соединение по п.1, отличающееся тем, что при наличии в нем второго, внутреннего, упорного стыка, глубина выемки имеет максимальное значение в начале первого витка резьбы у каждого упорного стыка соединения, уменьшаясь до нулевого значения к середине длины резьбы.1. A threaded pipe connection containing two parts - a nipple and a sleeve, forming an external thrust joint and having a recess with a constant width and maximum depth at the beginning of the first turn to the joint, made along the helical line of the thread from the non-working side of its profile, characterized in that the width m the base formed during the excavation of the protrusion adjacent to the working side of the thread profile is determined by the expression m = S connections per thread turn closest to the abutment joint; D is the average thread diameter of the connection part. 2. The threaded connection according to claim 1, characterized in that in the presence of a second, internal, thrust joint, the depth of the groove has a maximum value at the beginning of the first thread turn at each thrust joint of the connection, decreasing to zero by the middle of the thread length.

Claims

1. A threaded pipe connection containing two parts - a nipple and a sleeve, forming an external thrust joint and having a recess with a constant width and maximum depth at the beginning of the first turn to the joint, made along the helical line of the thread from the non-working side of its profile, characterized in that the width m the base formed during the excavation of the protrusion adjacent to the working side of the thread profile is determined by the expression

m = S _o · k _os / π · D,

where S _o - the area of the dangerous section of the threaded connection details;

k _o - coefficient taking into account the share of the axial tightening force of the connection falling on the thread thread closest to the stop joint;

D is the average thread diameter of the connection part.

2. The threaded connection according to claim 1, characterized in that in the presence of a second, internal, thrust joint, the depth of excavation has a maximum value at the beginning of the first thread turn at each thrust joint of the joint, decreasing to zero by the middle of the thread length.