![tong snub line tong snub line](https://www.drillingformulas.com/wp-content/uploads/2014/07/rig-tong.jpg)
The tongs have a very high reduction ratio, so that torque rises very slowly and can be more accurately controlled.Ī control system for a power tongs comprising a snub line for restraining the tongs, a first snub line tension transducer for generating signals proportional to tongs torque in the hand-tight range, a second snub line tension transducer for generating signals proportional to tongs torque in the full makeup torque range, first means responsive to said first transducer for halting tongs operation at a preset hand-tight torque level, second means responsive to said second transducer for halting tongs operation at a preset full makeup torque level, and means.Ī control system for a power tongs comprising a snub line for restraining the tongs, a first snub line tension transducer for generating signals proportional to tongs torque in the hand-tight range, a second snub line tension transducer for generating signals proportional to tongs torque in the full makeup torque range, first means responsive to said first transducer for halting tongs operation at a preset hand-tight torque level, second means responsive to said second transducer for halting tongs operation at a preset full makeup torque level, and means for disabling said first means. The system enables the operator to verify that the threads are properly engaged before applying full torque to the connection.
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The hand-tight torque limiter is manually or automatically disabled after the hand-tight level is reached. & Aadny, B.S., 2011. Fundamentals of drilling engineering, Richardson, TX: Society of Petroleum Engineers.A control system for power tongs comprises two tongs torque limiters, one of which limits tongs torque to a very low (hand-tight) level the other limits torque at full makeup to, for example, 2000 ft. & Millheim, K.K., 1986. SPE Textbook Series, Volume 2: Applied Drilling Engineering, Society of Petroleum Engineers.
TONG SNUB LINE PROFESSIONAL
Lapeyrouse, N.J., 2002. Formulas and calculations for drilling, production and workover, Boston: Gulf Professional publishing.īourgoyne, A.J.T., Chenevert, M.E. You can download the spreadsheet from the download link. The tongs if a snub line breaks or the tongs come unlatched Pipe Possible Solutions: Inspect tong dies, counterweight cables, and snub lines tourly and prior to each trip. How much pulling force do you require to achieve the required make up torque?Īnswer:7,675 lb pulling force is applied to 4-ft tong in order to get the torque at connection at 30,700 ft-lb. 4.2.8 Ensure that the power tong snub line is at 90. For operation, the hydraulic cylinder is connected by a shackle to the rear of the tong and a snub line is connected to the cylinder.
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Metric Unit Force = Torque ÷ Length of the tongĬonnection 4-1/2” IF – required make up torque = 30,700 ft-lb. Tong Accessories Tong Options The Worlds Leading Manufacturer of Hydraulic Power Tongs. The illustration above demonstrates the direction of force. Tong snub lines should be of such length that when securing pipe in the rotary table, a 90-degree angle is formed between the tong body and the snub line. Oilfield Unit Force = Torque ÷ Length of the tongįorce is perpendicular to the tong length. This formula below is used to determine force at required make up torque value.
![tong snub line tong snub line](https://www.osha.gov/sites/default/files/inline-images/spinning_chain.jpg)
TONG SNUB LINE HOW TO
This article will describe how to determine the correct force applied to get the correct torque value when you use the rig tong to make up the connection. The question is asked about how to get the right torque value to the connection if you use the rig tong because you will not see the torque value on the gauge. One application of the rig tong is to use to make up connection.