The jack up rig is a selfelevating drilling rig with a topside overall length of 84 m, width overall 90 m and depth 9. To introduce participants to the theoretical and practical considerations for safely moving a jack up unit from one location to another. Our fleet of 15 jack ups has experience in numerous offshore locations worldwide and is continuously upgraded and modified to accommodate our clients needs. Impact loads on a selfelevating unit during jacking operation. During a wet tow, a jackup is moved between locations in floating mode with the legs up and assisted by one more towing vessels. Each component of the system has been designed for high reliability and fieldproven performance.
Jul 16, 2014 this is a basic, broad introduction to offshore drilling and jackup rigs. Rigs with top head drive do not use a rotary table and kelly. Exploratory drilling is carried out mainly by jack up rigs, semisubmersibles, or drillships. T g n liz s f j ckis 19700t which was determined from a calculation of the lowest natural frequency of the jack up using a beam model. Types of oil rigs land rigs the sequence of operations is as follows when a land well is drilled. These are made in the form of reversed racks that are clamped into position after the rig is elevated and removed when the rig is ready to be moved.
Guidelines for the selection and operation of jackups in the. A basic guide to oil and gas drilling operations greasebook. Based on rig owners financial statements, investor presentations and our estimations, average costs to run a jack up rig in the middle east are as follows. At a certain limit, the leg members fail to pass the api acceptance criteria due to high stresses in the legs. The jindal star, a new build mlt 116 e, was towed from lamprells shipyard in uae to an ongc platform location offshore the west coast of india. This report addresses the foundations of jackup rigs, with the overall objective.
Instead, a hydraulic motor that travels up and down the mast supplies torque directly to the drill pipe. How much does it actually cost to operate a jack up drilling rig. By the end of the article, you can expect to gain a basic understanding of the following. Collisions damage assessment of ships and jackup rigs. Herrenknecht vertical jack up rigs jack up cantilever rig packages for safe and efficient offshore operations the herrenknecht vertical jack up rig, a highlyau tomated cantilever rig package for offshore drilling and workover on jack up platforms. The survey should give the sea floor penetration to be expected at that location for this geology. It has a compact set up with drilling and production operations carried out simultaneously in one mobile offshore facility. Heavy duty modular rig mobile offshore drilling units modus or rigs jack up rig 350500 ft semisubmersible rig 5005000 ft drillship platform rig cantilever jack up rig what can go wrong.
Land platform jack up semi submersible drill ship tension leg. Guidelines for offshore structural reliability page no. The rig is currently going extensive upgrades and will recommence operations for repsol offshore norway in 2019. Gulf coast training technologies courses jacking operations. Exploration drilling shallow waters bay barge submersible posted barge rig. The cantilever assembly with drill floor and pipe rack is also capable of skid off operation. The documents are available free of charge in pdf format. A basic guide to oil and gas drilling operations just like no two people are alike, neither are two wells.
Wet tows are the most common method of inter field rig moves of a jack up drilling unit and are by far the most practical, even over relatively long distances. Although smaller in size than a large conventional rotary table rig, top head drives are capable of. These conditions increase the complexity of the offshore rigs, and justify their higher daily rate compared with an onshore drilling rig of the same capacity. Maersk drilling has been an innovator in jack up drilling for more than 40 years and holds a leading position in the highefficiency segment. An introduction to well intervention spe aberdeen monthly evening meeting jim wright. Nabors shallow workover jack up rigs generally are subject to a maximum water depth of approximately 125 feet, while some of our jack up rigs may drill in water depths as shallow as feet. Jackup response in the elevated mode of operation 10. Guidelines for the selection and operation of jackups in. This is a new endeavor to perform subsea well completion using a jackup rig in indonesia and finally it is a successful operation to drill and complete the five terang wells using a longleg jackup rig. There is a current tendency to design jackup units for extended period operation at specific sites, b. Nabors also has deeper water jack up rigs that are capable of drilling at depths between eight feet and 150 to 250 feet. The rig is equipped with a precise hydraulic cylinder hoisting system and. Dnvglrp0075 edition november 2014 inspection and maintenance of jacking.
Jack up this is a mobile drilling rig, different from the semi submersible. How to find your way around when youre onboard a jackup. Jack up rig approach to platformrig move operation. Pdf foundation performance of offshore jackup drilling rigs. Guidelines for jack up rigs with particular reference to foundation integrity. On some rig designs, a stronger, stiffer connection between the rack and jack case called a rack fixation device is used to support the rig while it is not being elevated or lowered. Jack up drilling rig floating drilling rigs they are not attached or resting on the ocean bottom and. We have drilled in the russian, kazakh and turkmen sectors of the caspian sea for. 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. Jack up rigs operational aspects offshore drilling. This is a basic, broad introduction to offshore drilling and jackup rigs. Mar 29, 2015 how jackup drilling rig is moved from one location to another animation video with footage from real life operation. An introduction to offshore drilling and jackup rigs.
The generalized mass of the jack up is 19700t which was determined from a calculation of the lowest natural frequency of the jack up using a. Drilling operations differ from onshore ones, as the rig. Investigation of jackup leg extension for deep water. The following safety tips should be observed when rigging updown a drilling rig. Investigation of jackup leg extension for deep water operations. Kensteel was awarded the salawati field development epc contract for the topside jacket and topside deck. We operate in culturally diverse environments, strictly following best internationally practices. Prejob planning should be done to determine the safest and most efficient means to do the job. Impact loads on a selfelevating unit during jacking operation a methodology incorporating sitespecific parameters for weather window assessment masters thesis in the international masters programme in naval architecture and ocean engineering viktor daun and fredrik olsson department of shipping and marine technology. Often a much shorter and lighter collar is used, and the rigs have pulldown chains to utilize part of the rig s weight at shallow depths.
An operation carried out on an oil or gas well to extend its producing life by. Punchthrough it is very important to establish the sea bed characteristic at the proposed drilling location. Mud system design for rig terras titanium strength analysis of spud can and jacking structure helideck analysis as per cap437 for various rigs preparation of operations manuals for rigs jack up barges flag and classification surveys on behalf of panama gangway design inclining experiment. Platform rig mode completely autonomous from the jack up. The saturn jack up rig was acquired in 2011 from transocean. The purpose of the visit was to carry out a full condition survey of the primary drilling equipment, mud system, well control. The survey should give the sea floor penetration to be expected at that location. Offshore drilling operations drilling starts after the rig has been positioned vertically over the well, by means of mooring or dynamic positioning. Deep water operations tandemjoint towing operations 10. Kfels super b class, 3leg selfelevating cantilever type drilling rig. If real safety level is higher than the target safety level, then the performance of the jack up platform is adequate. Structural safety of oil jackup rigs in operation request pdf.
Instead of floating over its drilling location the jackup has long leg structures. The jack up rig, after leg extension, should also satisfy the stability requirements during the transit mode. History and types of units elevated operations management of operations stability and marine operations foundations and elevated operations rig moving practice wet and dry transport. Staff from aqualis offshores dubai office last week successfully moved its first jackup rig in india. Interocean ii after a dramatic crew rescue in 1989, the interocean ii sank in a north sea storm after towline failure.
Units with spud cans have operated on seabeds of hard and soft soils. At the various ocean platforms that are used for marine petroleum development and other marine structures, jack up unit relatively is suitable for neritic province domain, it is few to have steel using amount, cost is low, completion waterborne, almost can both continuous operation and efficient advantages of higher under various sea situations. Nov offset derrick, 160 ft h with 35 ft x 35 ft base and a 18 ft x 12 ft top. Such personnel can generally assess, through visual observations. How to find your way around when youre onboard a jack up. Inspect the pressure gauge and flowline valves and hoses. 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.
A comparison between onshore and offshore drilling rigs with proposed future developments. Subsea drilling, well operations and completions page 5 of 45 executive summary as drilling extended further offshore into deeper water, offshore drilling rigs became larger and more complex with workers who are more highly skilled. A jackup rig is a barge fitted with long support legs that can be raised or lowered. Availability 2022 2019 available 2020 2023 2027 2028 2021. Bohai 2 in 1979, the jack up bohai 2 capsized and sank in a storm while on tow off the coast of china. The jackup rig used for exploration activities and drilling operations in waters depths of up to 180m. Introduction the offshore structures are used for various operations drilling, breakwaters, embankments etc in various water depths and environments. It has a compact setup with drilling and production operations carried out simultaneously in one mobile offshore facility. Jack up rig free download as powerpoint presentation.
Both the equipment and personnel must deal with wellconstruction conditions that are greatly challenging. Dnvglrp0075 inspection and maintenance of jacking systems. Jackup rig hull and special steel structures kensteel. The jackup is maneuvered selfpropelled or by towing into location with its legs up and the hull floating on the water. Once drilling is required in waters that are deeper than the capabilities of a jack up, semisubmersibles and drillships become a more logical choice for exploration and development operations. Specificity of jack up rigs to approach specific platforms due to signature pugmarks left behind increase in market demand for large jack up rigs, increased day rates to very high. The results of the jack up leg extension carried out show that there is a limitation for leg extension. Rig brochure the maersk intrepid ultraharsh environment jackup rig is a msc cj70x150md, designed for yearround operation in the north sea, based on the design of the m. The neptune jack up rig built in sharjah, assembled and commissioned in astrakhan commenced drilling in 2014 in turkmen sector of the caspian sea. 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. After rig maintenance in azerbaijan, saturn is currently under contract with petronas in the turkmen sector of the caspian sea.
How jackup drilling rig is moved from one location to another animation video with footage from real life operation. Tug and tows a practical safety and operational guide i 5 this booklet has been produced by the club in response to the increasing number of claims and incidents arising from towage operations which have resulted in injuries, groundings, collisions, pollution, property damage and loss of cargo. Pdf operational scour management for safe jackup operations. The simulator is on an electronically controlled tilt table that gives the student the real feel of being in the jacking control room.
Jackup rigs operational aspects offshore drilling free download as powerpoint presentation. Jack up rigs operational aspects offshore drilling free download as powerpoint presentation. Once the rig move planning has been carried out, a prejob meeting with all involved should be held. Jack up unit, fem analysis, platform structure, leg structure 1. Overview of jack up rig and its components 18 preinstallation works prior to installation of a drill rig 19 installation, operation and removal of a jack up rig 21 activities that occur during well drilling, servicing and well commissioning 23 activities associated with logistics 24 general field activities 25. 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. Inspect the shear relief valve safety valve for proper operation and correct nail size. The offshore drilling industry and its phases from exploration to extraction. Jack up rig approach to platformrig move operation youtube. We own the largest fleet of jack up drilling rigs in the sectors of the caspian sea where we operate. Since the conception of jack up and semisubmersible rigs, the prevailing opinion was that a jack up rig will always be preferred over a semisubmersible. Drilling vessel description designed and constructed by bethlehem steel corporation 1974 completely remanufactured as a cantileverable drilling rig in.
The jacking operations course is being offered by gulf coast training technologies utilizing our state of the art gcm simulator with the programs matching a bethlehem jack up rig. Often a much shorter and lighter collar is used, and the rigs have pulldown chains to utilize part of the rigs weight at shallow depths. Offshore drilling rigs drilling offshore drilling rigs. Marine operations of self elevating platforms jack up rigs. Guidelines for jack up rigs with particular reference to foundation integrity adrian dier bsc. Perisais first jack up drilling rig is a ppl pacific class 400 with technologically advanced drilling capabilities.
The selfelevating unit or jack up structure is an offshore structure of the floating platform type equipped. Upon arrival at the work location, the legs are jacked down onto the seafloor. A jack up rig is typically used at a dozen or more sites during its service life. Just like no two people are alike, neither are two wells. Ownership seadrill limited seadrill partners seamex limited northern drilling.
Calculation of the environmental loads on the jackup legs during operations. Efficiency of time comparing with modular rigs for. Rig moving the movement and relocation of mobile offshore drilling units modus is a regular feature of offshore marine operations, and ensuring these are undertaken in a safe, efficient and economically sound manner is a key service offering from loc. Tugs and tows a practical safety and operations guide. It doesnt matter if the wells are located in the same area, utilize the same equipment, or if they are drilled into with the same oilbearing formation. The challenge of this project was to drill and complete subsea wells by a jackup rig which is equipped with only surface bop. Rig type jack up drillship semitender semisubmersible tender rig. Scour is an imminent threat for jack up operations in shallow waters with sandy seabed conditions, strong tidal currents andor a harsh wave climate, such as the north sea.