Determination of the make-up torque for pipe joints

Details Determination of the make-up torque for pipe joints Determination of the make-up torque for pipe joints

1985-02-08

1986-09-30

Ruehl, Charles A.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Threaded fastener stress

29407, 116212, 285 93, B23Q 1700, G01L 524

Patent

active

046141200

ABSTRACT:
The invention provides a process for the determination of the make-up torque to be applied on a joint for pipe, destined to the petroleum industry according to which a reference mark is set on the male element and on the female element, so that when the two reference marks are brought to face each other, the make-up restriction stops (2) on the male element (1) and on the female element come into contact with each other; that after having applied a grease, we proceed to make-up by applying sufficient torque to cause one element to rotate with respect to the other one, at a predetermined angle beyond the point where the reference marks are facing each other, and we proceed to measure the torque; that this operation is repeated on a sufficient number of joints; and that a determination is made of the range of torques to be applied on the joints of this type with the grease that has been used.

REFERENCES:
patent: 3468563 (1969-09-01), Duret
patent: 3851386 (1974-12-01), Ellzey, Jr.
patent: 4054305 (1977-10-01), Gauauiva et al.
patent: 4127927 (1978-12-01), Hauk et al.

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