A wire tie or rod-rod is used as a weight for running a wire line (instrumental string) down the well and provides the weight required during abrupt operations against friction of the well and friction of the fluoroplastic.
Formula / rule for determining the weight of a solid steel rod:
OD² x 8/3 = weight (pounds per foot)
The impact force increased due to an increase in the mass of the stock, which it delivered by banks. Do not overload the instrumental threads, as excessive mass dampens the sensation and premature cutting of the pins.
Never hold the bait, otherwise it may damage the sharp edge. Must be used and supplied flat for wrenches.
Do not lubricate the threads of the instrumental thread - they unscrew the hole during the extended clamp. All connections must be clean and dry.
The standard stem length is 2 feet, 3 feet, and 5 feet.
The nominal OD of the stems is 3/4 inches, 1 inch, 1-1 / 4 inches, 1-1 / 2 inches, 1-7 / 8 inches, 2-1 / 8 inches, 2-1 / 2 inches.
There are 3 types of stem: solid rod, roller rod, lead rod.
The roller core is a valuable, sometimes necessary, addition to the instrumental string for deviated wells to reduce fractional losses from the tube wall.
A lead-filled barrel provides a massive weight of the same diameter and length. It has a conventional steel pin and box and a tubular steel outer cylinder. Inside the rod is filled with lead to ensure maximum density.
The filled stem is mainly used to conduct flow pressure surveys in order to obtain the maximum weight and minimum cross-sectional area. It protects against swimming or is blown into the hole during pressure surges.
Other heavy heavy weight stalks that are available include: tungsten, uranium, fine-grained (mercury alloy).
Do not use a lead-filled stock for shaking, as lead will tend to creep down and separate the outer cylinder.
