By Steve Devereux
This new drilling guide is split into 3 certain components: good making plans, wellsite operations, and reference info. It addresses all significant drilling subject matters in addition to the linked engineering themes invaluable for cutting-edge crew drilling technique. The emphasis of the e-book is useful, exhibiting the person tips on how to in attaining secure and value powerful wells.
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Production liner. This is set inside the production casing or inside the drilling liner if one has been run. It is set across the reservoir zones to provide zonal isolation and, if necessary, may incorporate sand control measures such as internal or external gravel packs. 2 ] drawdown while producing. The top of a liner hanger generally incorporates a PBR. This can be used for tieback liners (to convert the liner into a full string to surface), for scab liners (a length of liner with a packer on top in case the liner lap does not seal), or for setting retrievable completions without using a packer in the casing.
Lack of contingency hole sizes. 2. A monobore completion may be less suited than a conventional completion to wells requiring the ability to select different zones. 3. Few dedicated slimhole rigs are presently available and there will be a lack of incentive for drilling contractors to invest in them, unless operators find ways to create incentives. 4. In true slimhole sizes, well control presents more challenges and requires better training and equipment to detect and deal with smaller kicks, low annular capacities, and higher annular pressure drops.
Government regulations may require certain actions to be taken. For example, in Egypt it is required that all annuli have cement between the casing and open hole, even though no permeable zones may be present. This is not currently a requirement in the North Sea. It is important to know these details at the well design stage to avoid unnecessary work in the future. Restoration of the site after abandonment should also be considered at the well design stage to minimize the expense later on. 2. Monobore Completions Monobore completions (where fullbore access to the production zone is possible through the completion tubing) allow hole sizes to be decreased with no loss of production compared to traditional completions.