| EFC Group offer various solutions to vertical Pipe-Handling and derrick stand management options. When enhancing or adding vertical Pipe-Handling equipment to a vessel, numerous layouts and options are available which can vary significantly – depending on the parameters given:-
- Derrick size / Layout
- Setback area
- Stand-building requirements
- Drill-floor layout
- Dual activity requirements
- Range of Tubulars (concurrent well centre activity and making up stands offline)
EFC Group consultancy service can help you choose the right solution, offering layout and sequence drawings of new / existing equipment and proposed Pipe-Handling schemes.
Systems
EFC Group can design and supply complete Pipe-Handling Systems incorporating racking components, Fingerboards, Control systems, interface steelwork and Operator’s consoles/cabs, either for new build projects, or retrofits for refurbishment/upgrade projects.
Bridge Racking System
The Bridge Racker is mounted in the derrick on two runway beams above the Fingerboards. The main bridge, spanning the derrick, consists of two fabricated box section beams tied together at the ends with long travel end trucks, which run on long travel rails, with hydraulic rack and pinion drives.
A traversing cross travel trolley is mounted between the main bridge beams powered by a hydraulic cross travel drive unit. Mounted on the underside of the cross travel trolley is a slew ring carrying the slew column, consisting of a rigid column complete with hydraulic grip-head arrangement and hydraulic lift cylinder.
Two sizes of grip head are available to cover drill pipe and collars up to 9 ½” and casing up to 20″.
The bridge racker normally operates in conjunction with a Z-arm, mounted at deck level between the setback areas. It also slews, travels and telescopes in order to guide the lower end of the stand into position, and can be synchronised with the bridge racker motions. Control is typically from a derrickman’s cab positioned above the fingerboard.
Two Arm Racking System
A two-arm racking system can be used as an alternative to a bridge-racking system, and consists of an upper racking arm, and a central racking arm – working in tandem to transfer stands of pipe between well-centre and the setback area, using travel, slewing and telescoping motions.
The upper racking arm is located at fingerboard level, running on parallel tracks between each fingerboard. A compact head with rotating finger-type capture ensures that the stand of pipe can be accurately positioned in any of the racking positions. The Centre Racking arm is mounted directly below the upper racking arm, running on identical, parallel tracks between each setback. It is the Centre racking arm that provides the lifting part of the sequence via its travelling, reeved head arrangement mounted rigidly on the end of its telescopic boom.
Both arms may be synchronised and are typically operated in conjunction with a drillfloor manipulator arm controlled from derrickman’s and assistant driller’s cabins respectively.
The Casing stabbing basket is mounted in the derrick to provide safe man-access for various operations including inspection and stabbing operations. (Various options available).
The Lower Racking Arm (Z-Arm) is mounted at drill floor level, travelling between the setback positions on rails.
Slewing and luffing motions enable it to capture and guide the bottom of a stand to and from any racking position in tandem with an overhead facility (e.g. Bridge Racker).
The telescopic Drillfloor Manipulator Arm is used to capture and ‘tail’ stands of pipe and riser to and from well-centre.
A range of heads is available to suit the range of tubulars.
The mousehole is used for making up stands at a location away from well-centre.
It contains a travelling rabbit which enables lengths of pipe to be lifted / lowered to facilitate a roughneck to make up / break-out.
Downloads
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UK: +44 (0)1224 249355
USA: +1 713 468 5325
