STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

580 Drilling and Well Completions
or other acceptable means of holding small cords shall be used. The length of
tension test specimens shall be not less than 1 ft (0.305 m) between attachments.
If the first specimen fails at a value below the specified nominal strength, two
additional specimens from the same rope shall be tested, one of which must
comply with the nominal strength requirement.
The diameter of the ropes shall be not less than the specified diameter.
Torpedo-line lengths shall vary in 500-ft (152.4 m) multiples.
Well-Measuring Wire
Well-measuring wire shall be in accordance with Table 428, and shall consist
of one continuous piece of wire without brazing or welding of the finished wire.
The wire shall be made from the best quality of specified grade of material
with good workmanship and shall be free from defects that might affect its
appearance or serviceability. Coating on well-measuring wire shall be optional
with the purchaser.
A specimen of 3-ft (0.91 m) wire shall be cut from each coil of well-measuring
wire. One section of this specimen shall be tested for elongation simultaneously
with the test for tensile strength. The ultimate elongation shall be measured on a
10-in. (254 mm) specimen at instant of rupture, which must occur within the 10-in.
(254 mm) gage length. To determine elongation, a 100,000-psi (690-mPa) stress shall
be imposed upon the wire at which the extensometer is applied. Directly to the
extensometer reading shall be added 0.4% to allow for the initial elongation
occurring before application of extensometer.
The remaining section of the 3-ft (0.91-m) test specimen shall be gaged for
size and tested for torsional requirements.
If, in any individual test, the first specimen fails, not more than two additional
specimens from the same wire shall be tested. The average of any two tests
showing failure or acceptance shall be used as the value to represent the wire.
Well-Measurlng Strand
Well-measuring strand shall be bright (uncoated) or drawn-galvanized.
Well-measuring strand shall be left lay. The lay of the finished strand shall not
exceed 10 times the nominal diameter.
Well-measuring strands may be of various combinations of wires but are
commonly furnished in 1x16 (1-6-9) and 1x19 (1-6-12) constructions.
Well-measuring strands shall conform to the properties listed in Table 4-29.
To test finished strands to their breaking strength, suitable sockets or other
acceptable means of holding small cords shall be used.
Wire Guy Strand and Structural Rope and Strand
Galvanized wire guy strand shall conform to ASTM A-475: “Zinc-Coated Steel
Wire Strand.”* Aluminized wire guy strand shall conform to ASTM A-474:
“Aluminum Coated Steel Wire Strand.”* Galvanized structural strand shall
conform to ASTM A-586: ”Zinc-Coated Steel Structural Strand.”* Galvanized
structural rope shall conform to ASTM A-603: “Zinc-Coated Steel Structural
Wire Rope.”*
*American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.