The purpose of the visit was to carry out a full condition survey of the primary drilling equipment, mud system, well control. The initial design case which was considered was a jacking system of similar. Upon arrival at the work location, the legs are jacked down onto the seafloor. It is possible to bring the jack up very close to the production platform without undermining the platform. Platform rig mode completely autonomous from the jack up. Attached you can find the specs and all the information. Nonlinear analysis of jack up structures subjected to random waves a thesis submitted for the degree of doctor of philosophy mark jason cassidy new college, oxford trinity term 1999 there is a steadily increasing demand for the use of jack up units in deeper water and harsher environments. A typical modern drilling jack up is capable of working in harsh environments wave heights up to 80 ft, wind speeds in excess of 100 knots in water depths up to 500 feet. As instructed by fode ltd, we attended the jackup rig thule power which was jacked up in a standby position at the outer section of the sharjah harbor in sharjah uae. A jacking system 4 is described for a leg 3 of a jackup platform 1. Analysis and improvement of jacking systems for jackup rig free download as pdf file. Jacking systems are widely used in the offshore construction and drilling industries, such as in jackup vessels for oil drilling and offshore wind turbine installation.
Offshore drilling is very much an upstream activity. Punchthrough it is very important to establish the sea bed characteristic at the proposed drilling location. A selfcontained combination drilling rig and floating barge, fitted with long support legs that can be raised or lowered independently of each other. Each independent yoke is connected to a jack up structure by at least one vertically arranged double acting actuator 8 a 8 d. As instructed by fode ltd, we attended the jack up rig thule power which was jacked up in a standby position at the outer section of the sharjah harbor in sharjah uae. The cantilever assembly with drill floor and pipe rack is also capable of. In order to get uniform and reliable site approval procedures, a large study was initiated by a group of companies involved in jack up design and operations.
Jacking system bethlehem, electrohydraulic yoke and pin system. Tsc jacking systems range from sj220, sj350h, sj450, sj750 and sj suitable for harshenvironment liftboat or jack up rigs with water depth to 500ft. A jack up rig is fitted with long support legs that can be raised or lowered. There the legs are cranked downward by a rackandpinion gearing system until they encounter the. Different types of rack systems on a truss design leg, the racks are always attached to or part of the chords. Leg jacking systems are examined, and the pinions and gears of. Us8425155b2 jacking system for a leg of a jackup platform.
There were over 500 jackup drilling rigs in operation at the end of 20. Case history replaced rig, removed casing from nine subsea. Leg jacking systems are examined, and the pinions and gears of the climbing pinion. Jack up rig atlantic 7 exensco 69 and jack up pacific 12 expride wisconsin direct owners are authorized us to find a serious buyers for these units. Each component of the system has been designed for high reliability and fieldproven performance.
Jack up barges and jack up vessels for sale sun machinery. Ale loadout and floatoff of a 9,400t jack up rig, vietnam duration. This upgrade will enhance the inspection and analysis of the 375 kip mlt jacking system. Component analysis, metallographic examination and hardness test were performed respectively for a failed pinion and a new rack of the jacking system of a jackup platform. Upon arrival at the drilling location, the legs are jacked down onto the seafloor, preloaded to securely drive them. Retorqueing can be performed automatically by the vsd control. This can be used for either jacking up or jacking down. Firstly, let start with the jacking system, to lift and lower the hull, every jack up.
Positioning the jackup system on top of an spmt provides a hydraulic solution for lifting, transporting and installing a prebuilt. Analysis and improvement of jacking systems for jackup rig scribd. The successful use of the jacking unit system proved that it was possible to complete the campaign as a standalone operation without the requirement to mobilize a jackup drilling rig or barge. If any significant structural nonlinearities are present in the system then such non. Four separate consultants are to study four different jackups, as shown in table 11. A recommendation for the provision of two jacking engineers in circumstances likely to involve. Than the jacking system of hydraulic jack jacking type.
Drilling rigs on land are extremely simple but, because a jackup has to be mobile and seagoing, it needs facilities to generate its own power and water, and house the inhabitants that keep it running. Jackup certificates, manuals, publications, logs and records appendix d. Elevating system of jack up rigs drilling formulas and drilling. Jul 16, 2014 tug boats towing a jack up rig into position how the offshore drilling industry works. The range of jacking systems suits the gustomsc cj and ng series and can be easily customized to any other jack up rig design. Tsc can offer jacking system used for the most jack up s in the world.
This system is easy to activate, easy to cycle up and down, and it is easy to change out motors and other equipment yokeandpin system. Perisais first jack up drilling rig is a ppl pacific class 400 with technologically advanced drilling capabilities. Titans jackups jackup barges operate in the most demanding marine environments. Tug boats towing a jack up rig into position how the offshore drilling industry works.
A 1600 tonne compact jacking rig is seen installing a 3020mm o. Pdf contact fatigue life of a jacking pinion for jackup rig. The new jack up rig comes with an increased accommodation for 150 men, equipped with the latest drilling equipment and an offline pipe handling for a simultaneous operations support. Allowable contact stresses in jacking gear units used in. The first one is the rig atlantic 7 which is abs certified 2019 and ready to work.
Pdf a case study of rebuilding a jackup researchgate. Jack up rigs jack up rigs are mobile, selfelevating drilling and workover platforms equipped with legs that can be lowered to the ocean floor until a foundation is established to support the hull, which contains the drilling andor workover equipment, jacking system, crew quarters, loading and unloading facilities, storage areas for bulk and. Heavy seas, strong current, and large tidal ranges can make marine projects dangerous, if not impossible, from a conventional floating platform. Currently, tsc is one the worldwide first tier jacking system manufacturers globally recognized. The jack up is maneuvered selfpropelled or by towing into. Prejacking dp checklist engine room this should be completed by the engineers to confirm that the jacking and dp systems are operational prior to commencing dp operations. Guidelines for offshore structural reliability page no. The resulting linear dynamic system is then solved.
Jack up mat supported type for very soft seabed formations where high leg penetration is anticipated and nonacceptable, a matsupported ju can be mobilised. The jackup is maneuvered selfpropelled or by towing into location with its legs up and the hull floating on the water. Allowable contact stresses in jacking gear units used in the. Dnvglrp0075 inspection and maintenance of jacking systems. Feb 03, 2010 this video explains the mechanism of offshore jack up rigs. In order to get uniform and reliable site approval procedures, a. This is a challenge since in many cases the design of the jackup legs rack and pinion system is bumping up against the technical limits of the materials involved. Pacific class 400 is the latest proprietary jack up design by ppl shipyard following the success of pacific class 375 deep drilling jack up rig launched in 2004.
For titan and its clients, the karlissa a and karlissa b jackup barges have overcome these challenges and. A jacking system 4 is described for a leg 3 of a jack up platform 1. This mat transfers the weight of the jack up through the large surface of the mat. An introduction to offshore drilling and jackup rigs.
The jacking system comprises at least three independent yokes 7 a 7 d. For the above modifications, the jackup drilling rig has been analyzed. Perisais first jackup drilling rig is a ppl pacific class 400 with technologically advanced drilling capabilities. For each candidate site, an assessment is conducted to determine the suitability of the unit for the site and to provide data for the installation. Their knowledge covers the lubrication requirements of jacking systems and they can generally discern the normal jacking sounds when the system is being operated. Dynamic amplification of jackup platforms subjected to. Yoke and pin jacking systems utilize hydraulic rams to jack the rig up in stages, using slots on the legs to locate the. Jack up drilling rig drilling rig oil well avaliacao. Single sided rack a system that uses a rack with teeth on only. When it comes to jacking systems rexroth develops drive and control systems for various jacking system types and sizes, which are used in numerous self elevating platforms seps such as jackp rigs, jack up vessels and jack up barges. Let 116c jackup kfels bclass jackup phase 2 benchmarking of iso 199051 report no.
Guidelines for the selection and operation of jackups in the. To reduce downtime, allrig designed innovative polycarbonate cleardrop covers. Since that time, in waters up to about 400 feet deep, rackandpiniontype jackup drilling rigs have been the dominant type of offshore oil and natural gas drilling rig. A jackup rig is a barge fitted with long support legs that can be raised or lowered. Transparency provides the possibility to conduct continuous visual inspection during operation. Each independent yoke is connected to a jackup structure by at least one vertically arranged double acting actuator 8 a 8 d. The jacking system of jackup unit roughly is divided into two big classes at present. This report addresses the foundations of jackup rigs, with the overall objective of determining current knowledge. Dynamic amplification of jackup platforms subjected to nongaussian wave loads. The range of jacking systems suits the gustomsc cj and ng series and can be easily customized to any other jackup rig design. A jack up rig is typically used at a dozen or more sites during its service life. Jackup rigs were also used for maintenance and to meet many other needs in the oil and gas industry. The jackup, as it is known informally, is towed onto location with its legs up and the barge section floating on the water.
Jackup rigs have been the most popular and numerous of various mobile types of rigs in existence. It can therefore be expected to encounter a range of water depths, environmental load conditions and soil types. Nonlinear analysis of jackup structures subjected to random. Jacking system for a jackup vessel for installation of. The survey should give the sea floor penetration to be expected at that location for this geology. Nonlinear analysis of jackup structures subjected to random waves a thesis submitted for the degree of doctor of philosophy mark jason cassidy new college, oxford trinity term 1999 there is a steadily increasing demand for the use of jackup units in deeper water and harsher environments. These rigs are integrated and very compact units using singlestage cylinders to allow jacking from shafts not much longer than the tunnelling machine. Nov offset derrick, 160 ft h with 35 ft x 35 ft base and a 18 ft x 12 ft top. Pdf failure analysis of a pinion of the jacking system. Tsc can offer jacking system used for the most jackups in the world. Rig configuration the rig package drill floor, mud pumps, mud tanks.
Having all drive disciplines under one roof, hydraulic and electric concepts have. While exploration wells can be drilled with drilling slot jackups, the rig can also be jacked up over another smaller facility, drilling through its hull. The gustomsc jacking system offers safety, minimum maintenance and a variety of outstanding features from an operational point of view. Hines and his people have to work within the constraints of space and existing capacity when retrofitting a new system onto an existing rig. Since the first jackup was built in 1954, jackups have become the most popular type of mobile offshore drilling unit modu for offshore exploration and development purposes.
Fixed jacking system a jacking system where the gears are connected directly to the jack house. A jackup rig is typically used at a dozen or more sites during its service life. Guidelines for jackup rigs with particular reference to foundation integrity prepared by msl engineering limited for the. Each independent yoke is connected to a jackup structure by at least one vertically arranged double acting actuator 8 a8 d. This is a floating but not selfpropelled platform with legs that can be lifted high off the seafloor while the platform is towed to the drilling site. In offshore mobile jackup rig, platforms are generally supported by movable jacking system where strength of rack and pinion are very crucial in determining the design life. Such personnel can generally assess, through visual observations, whether the jacking system is operating normally. The jacking system comprises at least three independent yokes 7 a7 d. The new jackup rig comes with an increased accommodation for 150 men, equipped with the latest drilling equipment and an offline pipe handling for a simultaneous operations support. Tsc jacking systems can be configured to suit any other liftboat and jackup rig design. Jackup rigs are mobile, selfelevating drilling and workover platforms equipped with legs that can be lowered to the ocean floor until a foundation is established to support the hull, which contains the drilling andor workover equipment, jacking system, crew quarters, loading and unloading facilities, storage areas for bulk and liquid materials, helicopter landing deck, and other related.
Guidelines for jackuprigdesign with foundation guidance. The term jackup covers a large variety of offshore structures from small. Tsc jacking systems can be configured to suit any other liftboat and jack up rig design requirement and specific customer needs. Jack up rig free download as powerpoint presentation. The cantilever assembly with drill floor and pipe rack is also capable of skid off operation. The development of new systems involving new equipment and new methods for personnel. Tsc jacking systems range from sj220, sj350h, sj450, sj750 and sj suitable for harshenvironment liftboat or jackup rigs with water depth to 500ft. The jack up type drilling rig is a barge much as the previous lay barges, but with the introduction of structural legs that could be lowered to the sea floor. Pdf failure analysis of a pinion of the jacking system of a. Drilling vessel description designed and constructed by bethlehem steel corporation 1974 completely remanufactured as a cantileverable drilling rig in. A jackup drilling rig is an example of a mobile offshore drilling unit modu. Dynamic amplification of jackup platforms subjected to non.
475 526 92 1134 727 880 1354 417 1038 248 514 654 117 347 82 162 246 105 865 492 171 90 529 505 511 1366 895 741 365 1385 351 1104 865 1411 1130 1164 1179 793 1385 992 486 719 408 115 880 1070 1312 517 902 1071 247