초록 ▼

Disclosed is a threaded pipe connection. The connection includes tubular externally threaded male members and a tubular internally threaded female coupling threadedly engaged with the male members. The male members include a continuous thread having a first preferably straight portion and a second t

Disclosed is a threaded pipe connection. The connection includes tubular externally threaded male members and a tubular internally threaded female coupling threadedly engaged with the male members. The male members include a continuous thread having a first preferably straight portion and a second tapered portion. The thread includes a form having stabbing and load blanks and an axially extending crest and root. Throughout the thread, lead as measured along the load flanks is constant and the length of the crest and depth of the load flanks are constant.

대표청구항 ▼

A tubular joint, which comprises: a tubular externally threaded male member having a continuous helical thread having a first threaded portion with a flat angle of taper with respect to the axis of said male member and a second threaded portion with a second angle of taper with respect to the axis o

A tubular joint, which comprises: a tubular externally threaded male member having a continuous helical thread having a first threaded portion with a flat angle of taper with respect to the axis of said male member and a second threaded portion with a second angle of taper with respect to the axis of said male member, said second angle of taper being greater than first angle of taper, said helical thread having a form including stabbing and load flanks and an axially extending crest and root, wherein throughout said thread, lead as measured along the load flanks is constant and the length of said crest and the depth of said load flank are constant and the length of the root in said first threaded portion is longer than the length of the root in said second threaded portion; and a tubular internally threaded female member having a continuous helical thread mateable with said helical thread of said male member, said helical thread of said male member having a first threaded portion with a first angle of taper with respect to the axis of said female member substantially equal to said first angle of taper of said male member, and a second angle of taper with respect to said axis of said female member substantially equal to said second angle of taper of said male member, said female member helical thread having a form including stabbing and load flanks and an axially extending crest and root, wherein throughout said female helical thread, lead as measured along the load flanks is constant and the length of said crest and the depth of said load flank are constant and the length of the root in said first threaded portion is longer than the root in said second threaded portion.