Flanged or hubbed side outlets are located on one or both sides of the ram bops. National commission on the bp deepwater horizon oil spill and. Question is what is the logic of this configuration, why we would have the lower annular on the lower stack, the choke and kill manifold has been configured by operator, but what is the logic there. Alternative to paperport need to unstackstack pdf files. It is only used in the highly unlikely situation where a loss of well control includes both a surface blowout and failure of the blowout preventer bop. Well control final rule fact sheet 2 requires that bop systems include a technology that allows the drill pipe to be centered during shearing operations. The bop stack also includes various spools, adapters and piping outlets to permit the circulation of wellbore fluids under pressure in the event of a well control incident. Convert bop lower pipe rams to inverted test ramsmoc ss010 performed by cameron completed dec. List of well control and spill response equipment on rigs as. As part of the blowout preventer bop maintenance and inspection for deepwater operations study bsee contract number m11pc00027, the american bureau of shipping abs and absg consulting inc. In 2009, cameron delivered the industrys first 20,000psi largebore drilling bop stack. The system enables the bop stack to be transported via truck in a single, manageable piece and then slid into place more safely compared with assembling the stack onsite.
Pdf making the connection for well control on floaters. Basically what would be the advantages of having this bop arrangement rather than another. During drilling operations, the drill pipe which has a bit at its end passed from the rig through the riser and bop stack, then down into the well. Building on camerons leading highpressure technology, cameron delivered the industrys first 25,000psi largebore drilling bop stack in 2010 and a second one in 2014. This is installed between the packing box and the bop stack, or between the bop stack and the christmas tree. A wide variety of bop stack options are available to you, such as use, processing type, and machine type. Adding hand rails and stairs offers an full bop handling and access solution. Final report 01 bop stack sequencing and shear ram design. List of well control and spill response equipment on rigs as of 02. The fundamental bop control system for a surface bop stack.
The drilling rig on the oceans surfacethe deepwater horizonconnected to the stack 5,000 feet below through a long steel pipe called a riser. Subsea well control the subsea bop stack and bop related equipment are larger and more complex than most surface arrangements. It is a safe, fast and efficient latest model blowout preventer stack, which is mainly applied to mechanical drilling rig and work. In the stacking of bop s, generally two or more bop s are connected on one stack. Rules for classification and construction iv industrial services. A guide to the equipment, methods and procedures for the. Bops andor bop assemblies commonly known as bop stacks to or from the wellhead and storage. Doubleclick on a file to expand and rearrange individual pages.
There was a phase 2 of the bop examination that excluded csb and es, but phase 2 documents, photos, and videos were subsequently made available and considered in this report. Click, drag, and drop to reorder the files and pages. The number of ram preventers in a bop stack ranges from one to eight depending on application and water depth. There was a decrease in the rate of unplanned stack pulls 7 for rigs with subsea bop stacks. See schematic of a typical subsea bop stack in figure wc3. About 77% of these are mining machinery parts, 10% are oilfield drilling rig, and 3% are other mining machines. How to merge pdfs and combine pdf files adobe acrobat dc. Forthe net hydrostatic effect at bop stack, following formula was used. Api 53 also states in various sections that you shall meet api 16d, method a, b, or c for precharge. It is the policy of the united states penitentiary to provide reasonable access to legal materials, counsel, and reasonable opportunity to prepare legal documents. Since the hydraulic components of the control system historically have had more problems that have required the riser and bop stack to be pulled, the first efforts were directed at the hydraulic system. Bop lift ring connects to the annular of the bop stack for lifting of the stack with the bop crane. Total capacity 3,600 kips with 50 ft of wire travel moonpool 29. Blowout preventers an overview sciencedirect topics.
Bureau of safety and environmental enforcement bsee acquisition operations branch. The wrangler bop handling system is a fast and efficient alternative to assembling the bop stack on the wellhead. Us4108318a apparatus for offshore handling and running of a. Principles, normative references, conditions, documents. Our agencys strict compliance to carefully crafted policies, also known as program statements, is just one of the reasons why were a leader in correctional excellence. Api std 53 blowout prevention equipment systems for. Some land rig bop stacks are transported within a structure that is also used to handle. Procedures for inspection, maintenance, repair api. Drilling blowout prevention requirements and procedures march 2019 i. Executes and documents signal tests before installation.
Within acrobat, click on the tools menu and select combine files. A capping stack is a large well closure device that connects to the top of the blowout preventer bop and is capable of sealing off a well. Due to the remoteness and extra timeexpense in pulling the stack, additional considerations and extra backup arrangements are provided. Guide lines l function to guide and constrain the bop stack during the running of the stack from vessel 20 to where they are landed on substructure t.
General description vessel dimensions imperial metric. Pressure test of blind rams and outer valves on spool. Click combine files, and then click add files to select the files you want to include in your pdf. On the item ribbon, click the arrow next to combine items and choose into pdf stack. Assessment of bop stack sequencing, monitoring and. Read here what the bop file is, and what application you need to open or convert it. Integral blowout preventer stack the integral bop stack integrates ram blowout preventer, annular blowout preventer and drilling spool. Download those documents and other official forms below. You can stack a group of pdf or max files into a single pdf file. The amount of the nitrogen should be enough to close the bop stack valves for 1. Spudding initially performed through a temporary guide base until casing can. Since the hydraulic components of the control system historically have had more problems that have required the riser and bop stack to be pulled, the first efforts were directed at the hydraulic system, including all hydraulic stack mounted components. Select the files in the order you want in the stack. Based on followup documents submitted to safeocs, only 12 of the 18 components involved in unplanned stack pulls were sent to shore for further analysis by the original equipment.
A bop stack is an installation style of blowout preventers which is useful in controlling the wellhead pressure from an oil well. Bop skids the bop skids are movable fore and aft on the cellar deck from the testassembly area to the staging area, using a hydraulic skidding system. Guide lines l are supported in pairs on each side of the guide well by a movable carriage structure 39 including pulleys 40, and structure 39 functions also to move guide lines l from the. A blowout preventer shown at right is a large, hydraulicallyoperated system of valves and stacked closure devices. Rearrange the documents as you wish in the second window, titled, arrange the files in the order you want them to appear in the new pdf the final window, titled, choose a file size and conversion setting allows you to control the size of your merged pdf document. Documents discussed during congressional hearings june 17, 2010, suggested that a battery in the devices control pod was flat and that the rigs owner, transocean, may have modified camerons equipment for the macondo site including incorrectly routing hydraulic pressure to a stack test valve instead of a pipe ram bop which increased the. Common bop stack arrangement for michigan operations, courtesy of nl shaffer7 figure 12. We would like to show you a description here but the site wont allow us. Less pressure requited to shear capable of centering pipe before sharing sh earing rang wireline to 14 tempe ra tu e range. Tl bop stack control equipment, stack mounted, 1834 15,000 psi wp dimensions n parentheses aro in millimeters. When pulling and running downhole tools, the lubricators should be installed, and its structure is the same as in figure 3129. Some oems believe that it is oem responsibility to develop such models on their specific systems. Although the delegates only require to learn about surface bop stacks the drilling contractor specialises in tender assist drilling, example photo below, theres plenty of subsea bop stack information available should the company ever move into semisubmersibles for example. Certification covers the entire bop stack, including its machinery.
Today, cameron is still the only fieldproven 25,000psi bop technology leader. Deepwater horizon blowout preventer failure analysis report. Bop stack, ram preventers are located between the annular bop and the wellhead. Abs consulting compiled and analyzed data and information related to bop system failure events and maintenance, inspection, and test mit activities. It is a safe, fast and efficient latest model blowout preventer stack, which is mainly applied to mechanical drilling rig and work over rig with limited installation space. To control a blowout, the bop stack is fitted with hydraulic lines which.
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