• Author / Uploaded
• Hussain Musa

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Question 1 A.

B.

Question 2 A.

B.

Question 3

Question 4 A.

B.

Question 5

Temperature (ᵒ F) 0

50

100

150

200

250

0

2000

4000

6000

Depth (ft)

8000

10000

12000

Loss of circulation zone is from 9000 ft to 10000 ft due to the large increase in temperature from 172 ᵒ F to 222 ᵒ F. This indicates that the mud loss takes the temperature of the formation.

Question 6 A.

B.

Question 7 A. Weight on Bit (WOB)

B. HL while Drilling

C. Drag = HL reading while pulling out – P (Real weight of drill string)

Question 8

A. Maximum depth at Pt = 501090 lb

B. Maximum depth at Pt = 394600 lb

Question 9

A. Maximum Length of drill pipe Grade E

To check that the length of Grade G can handle Grade E plus HWDP plus DC:

Hence, under the existing loading conditions, 9175 ft of Grade G can be used as a top section. IN our case, only 2370 ft are required. B.

of the heavier grade:

Question 10











, from table 2.4 tensile strength = 311540 lb

Maximum torque that can be applied at surface:

Since the make-up torque for the drill pipe tool joint is 20000 lb.ft, then the maximum allowable torque should based on tool joint torque (20000 lb.ft) and not pipe body torque.