Patent ID: 11879297
Assignee: REFLEX INSTRUMENTS ASIA PACIFIC PTY LTD
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. A downhole tool comprising
a hollow tubular pipe section having an end;
a thread formation provided on the end, wherein the thread formation further comprises
a first thread having a first thread start located in an axially tapered part of the first thread, the axially-tapered part of the first thread cut short by a circumferential angle α;
a second thread having a second thread start located in an axially tapered part of the second thread, the axially-tapered part of the second thread cut short by a circumferential angle β;

wherein the first thread start is operatively rotationally in advance of the second thread start;
wherein the circumferential angle β is greater than the circumferential angle α; and
wherein the first thread is configured to at least partially engage within a complementary thread formation on a complementary downhole tool before the second thread engages within the complementary thread formation.