OMCI RIG TECHNICAL & SUPPORT SERVICES PVT. LTD.

Rigs

Jack Ups:

A jack-up rig or a self-elevating unit is a type of mobile offshore drilling unit (MODU) that consists of a buoyant hull fitted with a number of movable legs (usually 3 or 4), capable of raising its hull over the surface of the sea. The average operating water depth for Jack up rigs is 350 ft .The legs of such units are designed to penetrate the sea bed, and may be fitted with enlarged sections or footings, known as ‘spud cans’.

The premise of a jack-up rig is that it is self-elevating; here, the legs are stationed on ocean floor and the drilling equipment is jacked up above the water's surface. A Jacking system is used for lowering and raising the hull and the skidding system is used for the transverse and longitudinal movement of the cantilever and drill floor.


Our Proficiency and Competence in the various systems on board Jack ups include, but are not limited to:

  • Drawworks
  • Top drives
  • Rotary Table
  • Pipe handling
  • Mud pumps
  • Shale shakers
  • Mud cleaning equipment
  • Engines
  • Generators
  • Power distribution systems
  • SCR systems
  • Automation & control systems
  • PLC based logic and communication / control systems
  • BOP (Blow out preventers)
  • Jacking systems
  • Skidding systems
  • Cementing unit
  • Choke AND Kill manifold controls
  • Cranes
  • Winches
  • Safety alarm systems (fire, gases etc)
  • All marine installations – pumps, fresh water makers, coolers & heat exchangers
  • Sewage plants
  • HVAC systems
  • Provision fridge systems

Semi Subs:

A semi-submersible is a MODU supported by columns that are submerged into the water on a pontoon. The operating water depth for these type of rigs is 10,000 ft. Semi-submersibles are highly stable rigs. Partial submersing of the columns enables the rig to minimize roll and pitch. The stability of the rigs is achieved by mooring of the anchors or by Dynamic Positioning. These rigs have an extremely capable ballast monitoring and control system.

The compensation systems are used in subsea applications for preventing any damage to the drilling systems due to sea swells and subsequent heaving movement of the complete rig. These are therefore, vital equipment for a semi-submersible rig for carrying out safe and uninterrupted operations.

In addition to the systems which are common on both Jack-up and Semi-Sub Rigs (already enlisted in the section under Jack-Ups), there are many systems which are specific to the semi-submersibles that are rated as operationally critical. Our Proficiency and competence in these specialized systems include, but are not limited to:

  • Ballast Control Systems
  • Dynamic Positioning Systems
  • Compensation Systems
  • BOPs and LMRPs
  • Riser Systems
  • Engines
  • High Voltage systems
  • Pipe Handling Systems
  • Drilling Systems

Drill Ships:

Drill Ships include Mobile offshore drilling units that are composed of a ship with a drilling rig placed on its top deck. These ships can go right to the drilling location on its own propulsion. To remain stabilized, they use a dynamic positioning system (through thrusters) in addition to the use of anchors to take into account any drift while the rig is in operation. The drill in the drill ship operates through the moon pool in the ship's hull. Drill ships can operate in deep water at a depth of 12000 ft.

Drill ships have an extensive use of automation controls on board. Along with mechanical, drilling, electrical and automation control systems we are proficient in:

  • Dynamic Positioning Systems
  • Compensation Systems
  • Marine Riser and Tensioning systems
  • BOPs and LMRPs
  • Cranes and Handling systems
  • High Voltage systems
  • Tubular Systems
  • Marine and Navigational Systems
  • Automated Drilling systems