Page 140 - 4637
P. 140
3. What types of bearings are used in the swivel?
4. Why are rubber, fiber and metal rings used around the
cylinder?
5. What can indicate that the swivel is overburdened by
extreme mud pump pressure?
6. Which criteria is used to rate the swivels?
8. What effect would increasing of the ID of pipe, hoses,
connections or drill collars bring?
9. What do the numbers in the numbering 3-S, 4-S, 6-S
represent?
139
