Patent ID: 9163671
Filing Date: 2015-10-20
Classification: E21B,F16D,Y10T

Abstract:
1. A connecting device comprising: a drive section having a thread, wherein the drive section thread is configured to screw onto a thread of a shaft element, and wherein at least one positive-locking element is provided within an area of the threads of the drive section and the shaft element, the positive-locking element configured to form a positive-locking connection between the drive section and the shaft element, the positive-locking element being sized to engage with an elongated opening extending in an axial direction through the thread of at least one of the drive section and the shaft element, and also to engage a recess in the other of the drive section and the shaft element in order to form the positive-locking connection, wherein the elongated opening and the positive-locking element are sized such that no load is placed on the positive-locking element during the transfer of at least one of axially tractive or compressive forces between the drive section and the shaft element.