What is the recommended make up torque to any connection of drill pipe?
What is the recommended make up torque to any connection of drill pipe?
The recommendation we give OWS customers is to apply maximum make-up torque, and not to exceed that. As a rule of thumb, maximum make-up torque is 60% of torsion capacity (for API connections).
What is if connection in drill pipe?
IF(Internal-flush style connection) This type of tool joint thread connects EUE or inside and outside thickened drill pipe, forming the inner diameter of the drill pipe joints, tube inner diameter and thick pipe inner diameter is equal to the inner diameter or approximate size.
What is make up torque?
The rotational force used to make up a connection in the string. Drill pipe failure may occur when the make-up torque of a connection is exceeded.
What is tensile strength of drill pipe?
API Grade Drill Pipe
| API Drill Pipe Grade | Minimum Yield Strength (psi) | Minimum Tensile Strength (psi) |
|---|---|---|
| E-75 | 75,000 | 100,000 |
| X-95 | 95,000 | 105,000 |
| G-105 | 105,000 | 115,000 |
| S-135 | 135,000 | 145,000 |
What can happen if too much torque is applied while making up the drill pipe and drill collars?
Over Torque As noted, over torque can cause significant drill pipe thread damage. Over torqueing typically occurs when the drill pipe under torqued before its run down the hole. In these conditions the pipe continues tightening down the hole and can easily be over tightened.
What causes high torque in drilling?
There are various causes for excessive torque and drag, such as tight hole conditions, keyseats, differential sticking, sloughing hole, sliding wellbore friction and cuttings buildup caused by poor hole cleaning.
How do you calculate torque on a drill pipe?
To determine the correct amount of makeup torque required for a connection, multiply the friction factor by the required makeup torque for connection specified in API 7G. For example, the makeup torque for drill pipe with 5½ x 3¼ NC50 tool joints is 21,914 ft-lb.
What is a BHA component?
The bottom-hole assembly (BHA) is the component of the drill string that includes the core bit, outer core barrel, various subs, and the drill collars.
How is pipe strength calculated?
Barlow’s Formula relates the internal pressure that a pipe can withstand to its dimensions and the strength of its materials. The formula is P= (2*T*S/D), where: P = pressure. S = allowable stress.
How strong is drill stem pipe?
Drill pipe steel is commonly quenched and tempered to achieve high yield strengths (135 ksi is a common tube yield strength).
