Rotating a liner to TD that's still being made up
Rotating a liner to TD that's still being made up
(OP)
I've got an unusual liner on my next well- when the liner shoe reaches open hole, we'll still have 2000ft of liner to run. I'm wondering how we can ream this liner in while we're still running it! The Tesco Casing Drilling thing will be difficult due to stack up height on the rig...I'm thinking of connecting a water bushing on the top drive, making up a joint, connecting the bottom connection of the water bushing, reaming, undoing the water bushing and making up the next joint and so on.
Anybody got any other ideas?
Anybody got any other ideas?





RE: Rotating a liner to TD that's still being made up
Frank
RE: Rotating a liner to TD that's still being made up
Pulling out and underreaming (or simply doing a wiper trip) is not preferred because:
1) it's a singles rig and we have to lay down pipe rather than rack pipe so round trips etc take forever
2) we're using Oil Based Mud, and in the North Sea we have to have total containment of cuttings with OBM, so underreaming would mean more cuttings, more skips, more logisitcs headaches...
3) the company had a bad experience with a bicentered bit last year and so we can't drill an over gauge hole to start with using a bi centered bit.
RE: Rotating a liner to TD that's still being made up
Frank
RE: Rotating a liner to TD that's still being made up
Jeff
RE: Rotating a liner to TD that's still being made up
We're just about to run the casing, with 2 specially designed water bushing (NC50 x VAM top HT crossovers), which are just the right length to be able to ream down a full casing joint ready just in case. We had the VAM top HT threads manufactured to the low end of VAM's recommended tolerances to reduce any threat of galling as we will be making & breaking the premium connection repeatedly. We've got a reamer shoe on the end of the string (called a Pen-o-trator shoe...god I love these roughty-toughty names vendors come up with!). We didn't see any hole problems while drilling, there are no big doglegs, the bit & stablisers were in gauge on POOH, and we've circulated multiple bottoms up to get any cuttings out, so I think we're in good shape....