Standard Jack-Up is one of the rig design concepts for offshore driling in shallow water environments. 1. Water depth range 10 to 120 m for standard Jack-ups Minimum draft for small jack-up is around 7 metres, which would limit access to the north Caspian Sea. 2. Environmental Impact Potentially low although dredging may be extensively … Standard Jack-Up
Swamp Barge (With Optional Submerged Caissons) is one of the drilling rig design concepts for offshore drilling in shallow water environments. Swamp barges are a proven concept and can operate in water depth of 2 to 7 m. This is a concept extensively used in the USA, Nigeria, Indonesia, etc. With additional submerged caissons, … Swamp Barge (With Optional Submerged Caissons)
A. Backing off stuck pipe – Preliminary remarks: a. The neutral weight is calculated as the weight in air of the string above the stuck point. b. In order to avoid unintentional b/o (back-off), the maximum M/U torque should be applied before turning to the left. c. Determine maximum overpull to be applied to the … Backing-off procedure with top drive
Softwares are used to produce Drag charts on which is shown the measured and predicted weights vs. depth. The purpose is to provide the crew with the expected torque and drag during the drilling of each successive section of the well. This chart enables the driller to see at a glance what the torque and … Use of Drag charts for hole cleaning – WellPlan
1 Objective Drill 8 1/2″ hole to 15316 ft, run a lookahead VSP, drill 8 1/2″ hole to ± 15581 ft (85 ft above the “x” marker, run logs and set the 7″ liner . 2 General 1. The actual depth of the liner shoe will depend on the results from the lookahead VSP, and … 8.5″ Section Drilling Programme HPHT
Objective: To abandon the well in a safe manner permitting the removal and restoration of the location. Workover number: xxx Min. required hoist capacity: T 93 Estimated time : 2.5 days Estimated start date : Account code : Well history: The well was drilled in xxx and was completed as an oil well. An Outside … Abandonment programme – oil producer
1. Programme Summary Abandonment This programme will prepare the existing well for a forthcoming horizontal side-track which is due to begin immediately upon the successful completion of the abandonment. Due to the target constraints, the abandonment will commence from below the existing 20″ shoe. The existing completion will be retrieved from the wellhead down to … Abandonment and sidetrack drilling programme