Some of the standard drilling tools commonly used in drilling are briefly described here, together with procedures for, and information on, their use. More detailed descriptions and specifications of particular tools are to be found in the relevant manufacturer’s literature. 1. Float Sub Float subs are always used when drilling pilot holes, and can also … Standard Drilling Tools
Baryte plugs to cure losses.Drilling 12 1/4″ hole through a fault at 13,700 ft. Thereafter, gas levels continued to increase (80%). Despite weighing up the mudf, high gas levels were measured. Two gasblok cement plugs were set across / above the fault, but were unsuccessful (80% gas levels monitored after setting the plugs). Consequently, it … Baryte plugs to cure losses
Land rig on artificial island is one of the drilling rig concepts for offshore drilling in shallow water environments. 1. Water depth range: 0-10m. Costs rise significantly with water depth and distance from shore. 2. The environmental impact for marine life is potentially high. Island would disappear, with time, due to wave and ice effects. … Land rig on artificial island (shallow water)
Land rig on barge (with optional submerged caissons) is one of the drilling rig design concepts for offshore shallow water depth environments. Barges are a proven concept in shallow water and can operate in water depth of 1 to 4 m. With additional submerged caissons, operating range may be extended to say 1-8 m range. … Land rig on barge (with optional submerged caissons)
Heli-Rig is one of the rig design concepts for shallow water environments. 1. Independent of water depth. Requires a support structure which in itself would not be helicopter transportable, and therefore could only be used with a minimum of two support structures and a leap-frog operation. 2. Proven technology, but limited drilling capability. Pumping and … Heli-Rig
Posted Barge With Land Or Modular Rig is one of the rig design concepts for shallow water environments. 1. Could operate in water depth of 1 to 10 m. 2. Environmental impact potentially low. 3. Barges can be designed for ice operations. Ice management structures required to protect posts and barge. 4. Suitable for exploration. … Posted Barge With Land or Modular Drilling Rig
Modularised and Pile Elevated Drilling Rig is one of the drilling rig design concepts for shallow water environments. 1. Water depth range: 2 – 10m 2. Low environment impact. Installation and removal of piles may be complex. 3. Suitable for ice. Piles dimensions and clearance could be designed so that berms and/or ice rubble makers … Modularised and Pile Elevated Drilling Rig
Drilling rig on a Steel Caisson is one of the drilling rig design concepts for offshore shallow water environments. 1. Water depth range: 5 – 100m however must be designed for a limited water depth range, unless berms are considered. More study required to ascertain minimum water depth capability of concept with & without rig … Steel Caisson and Drilling rig
Cantilever Drilling Barge is one of the rig design concepts for shallow water environments. Water depth range: 3 – 7m Low environmental impact Suitable for ice. This is a development of the swamp barge, but nothing this big has been considered before. Not efficient for drilling single wells – primary purpose is multiple wells for … Cantilever Drilling Barge
Semi-Submersible is one of the drilling rig design concepts for offshore shallow water environments. 1. Water depth range: 30 – 1000m 2. Environmental Impact low 3. Not suitable for ice 4. Suitable for exploration and development. Easily moved between locations. Rig up time, essentially zero. Wells will be sub-sea completions – more costly and may … Semi-Submersible