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<p>Liner Hanger type is hydraulic with Hydraulic running tool,</p> <p>Liner top packer is PV-3</p> <p>hydraulic barrier is ball catch landing collar as part of liner casing as well as using retrievable cement bushing which is provided sealing between the slick joint OD and the Liner top packer ID,</p>
Type of tubing with other subserves devices for well production.
1- you have to limit circulation rate below the liner hanger setting pressure (shear bolts that release the hanger slips) to avoid shearing and setting the liner hanger accidentally while still RIH. ... (this should be taken care of during planning phase for the liner running & cementing job, .. drilling engineer should give you the maximum alloed circulating pressure, which must be below the minimum setting pressure for the hanger (each bolt shear pressure multiplied by the number of bolts)
- also this circulating pressure should vary along the way while RIH, as the liner goes deeper, you should need higher pressure to circulate thru the liner, so take care, the worst part is at the bottom.
- once the liner at the bottom & the liner hanger is ser, you are free to circulate but take care of the formation fracture pressure as mentioned in point #2.
2- Due to the big OD of the liner (compared to drill pipes), there is a relatively smaller clearance (annulus of liner), and this will give higher ECD than that while drilling. so if you used higher circulating rate, you risk fracturing the formation and having losses and even complete loss.
- of course mud parameters make huge difference in that regard... the highr mud rheology, the highrt the ECD.
3 - to avoid plugging the liner shoe / reamer shoe while RIH.
4- to simulate the pumping rate for the cement job.
5- to ensure liner hanger running tool is still attahced to the liner hanger.
1-Prematurely set Hydraulic liner hanger,
2-prematurely release hydraulic running tool,
3- swabbing packer element,
4-wash out the ball seat,
5- breaking the formation/lost circulation.
