Drilling Operations Summary The RIG will be mobilized from XXX to XXX. The rig will be moored in approximately xxx’ water depth. A string of 36” x 1.5” and 1.0″ wall structure pipe will be jetted to xxx’ TVD / MD (xxx’ BML). The shallow hazards survey indicates possible low risk shallow gas potential from … Drilling program example (Semi-Sub)

Types of vessels, offshore operations, supply vessel, stand-by vessel, AST vessel – Specifications may vary from above, and capacities are approximate only. – Fuel consumption figures are given as a guide for 24 hour continuous steaming but may vary by as much as 25% between operating at maximum and economic speeds. 1 Safety/stand-by vessels Approx. … Types of vessel, offshore support

Submersible driling rig is one of the drilling rig design concepts for offshore shallow water environments. 1. Could operate in water depth of 3 to 30 m. 2. Environmental Impact Potentially low. 3. Can be designed for ice operations. 4. Suitable for exploration. 5. Would have to be built outside the Caspian and imported. 6. … Submersible drilling rig

Hydrographic Surveys When  moving into a new location the following  hydrographic surveys are required: seismic sidescan sonar water depth soil analysis. These surveys are by arranged by the marine supervisor upon the Operations Engineer’s request and are carried out prior to moving a rig onto a new location, or siting a jacket. Seismic Survey An … Surveys required before rig move – Offshore

For an area where no previous knowledge of jack-up penetration / sub-bottom information is available the location must be cored, this may be done by a coring vessel prior to rig arrival or from the rig upon positioning at the location. 1. independent leg jack-up rigs A) Location Area, block name or number, Latitude, Longitude. … Guidelines for Site Survey/ Hazard Requirements for Drilling Units

Jacket Supported Offshore Rig is one of the rig design concepts for shallow water environments. Steel Jacket can be tailored to water depth. Rig design is independent of water depth. Environment impact is low. Jacket could be designed to withstand ice loads. Installation and removal may be difficult as barge and crane are required to … Jacket Supported “Offshore’’ Rig

Drilling Rig on Pre-Installed Piles and Modules is one of the drilling rig design concepts for shallow water environments. 1. Water depth range: 0 – 3 m. 2. Low environment impact 3. Particularly adapted to shallow water when ice is land fast. Platform can be erected in the winter season using Arctic equipment.  For deeper … Drilling Rig on Pre-Installed Piles and Modules for shallow water depth

Shallow Draft Jack-Up  is one of the rig design concepts for offshore drilling in shallow water environments. 1. Water depth range: 5 to 100m. Shallow water capability from fully retracting spud cans and possibly require attachment of additional floatation elements. 2. Environmental Impact Potentially low, although dredging may be extensively required which would be environmentally … Shallow Draft Jack-Up

Every offshore drilling operation must include some possibility of underwater intervention. This may be required for a variety of routine tasks including re-entry, guide-wire or riser connection, riser inspection and scour examination. It may also be required in the case of accidental damage to the wellhead/BOP system or to the drilling unit itself, and to … Diving operations in exploration drilling

1 Oceanographic and meteorological support Before planning an offshore operation it is essential to obtain information on the weather in the area. Wind, wave and current conditions have a major impact on the types of vessels that may be used and their ability to operate with minimum downtime. In some areas there may be seasonal … Surveying requirement for exploration well