Title:
TORQUE MILL APPARATUS
Document Type and Number:
Japanese Patent JPS60159419
Kind Code:
A
Abstract:
A pre-set torque limiter sub having a pin member and a box member. The pin member is connected to a section of drill pipe and has a pin connection at one end. The box member is connected to a second section of drill pipe. The pin connection and box connection are connected together. Whenever the torque on the sub exceeds a selected amount, the pin member and the box member can rotate with respect to one another. However, whenever the torque on the sub is below the selected amount, the pin member and the box member are held rigidly together.
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Inventors:
ARUBAATO PAIKU FUAA JIYUNIA
Application Number:
JP980185A
Publication Date:
August 20, 1985
Filing Date:
January 22, 1985
Export Citation:
Assignee:
HUGHES TOOL CO
International Classes:
E21B17/04; E21B17/042; E21B17/06; F16D9/00; F16L15/00; (IPC1-7): E21B17/046; F16D9/00
Domestic Patent References:
| JPS4820160U | 1973-03-07 | |||
| JPS339809Y1 |
Attorney, Agent or Firm:
Akashi Masatake