A typical project in drilling engineering.
In this project, we calculate these properties:
- The length of the drill collar
- Weight of drill string at air
- Volume of required mud to fill surface mud reservoir, drill string and hole.
- Weight of desired mud to overcome pore pressure. (By considering 100 psi for overbalanced pressure margin)
- The sacks of barite and volume of fresh water in bbl. (By using barite as weighting agent.) And Visulize:
- Mud pressure profile at static condition.
- Axial tension vs. depth for drill string.
- Volume of pumped mud vs. time
Use the following data: o A vertical well with 10,000 ft depth.
o Drill pipe:
▪ 5 in. OD; 4.276 in. ID; 19.5 lbm/ft.
o Drill collar:
▪ 5 in. OD; 2.5 in. ID; 147 lbm/ft.
o Casing:
▪ Casing shoe: 7,000 ft;
▪ 9 ¾ in. OD; 8.625 in. ID; 59.20 lbm/ft;
o Required WOB: 59,000 lb.
o Pore pressure @ 10,000 ft: 6,000 psi.
o Mud pit and surface facility volume: 100 bbl.
o Pump Data:
▪ Triplex; 6.5 in. Liner; 18 in. Stroke; 3,000 psi; 20 stroke/min;
▪ Efficiency: 80%;
هد