Time filter

Source Type

Tulsa, OK, United States

Cloyde C.J.,TD Williamson Inc.
Proceedings of the 22nd Pipeline Pigging and Integrity Management Conference

Pig launchers and receivers or pig traps are simple pieces of equipment to design, fabricate, and install. However, a basic understanding of the parts, launching and receiving sequence, and design aspects are essential for each pipeline operator. A discussion covers the pig launchers and its components; pig receivers and the receiver systems; pig trap design; pig trap assessments; levels of trap assessment; and on-site trap assessment procedure. This is an abstract of a paper presented at the Pipeline Pigging & Integrity Management Conference (Houston, TX 2/17-18/2010). Source

Lim G.,TD Williamson Inc.
Proceedings of the Biennial International Pipeline Conference, IPC

Subsea hot tapping of pipelines is performed for a variety of reasons, including tie-ins, pipeline repair, insertion of instrumentation, facilitating chemical injection or providing access for temporary isolation tools. The full hot tap process - That is, installing the hot tap assembly, performing the tap and recovering the hot tap machine - is normally conducted with diver assistance. After bolting the assembly of the machine, isolation valve and fitting to the pipeline (or machine and isolation valve to a pre-installed flanged membrane on the pipeline), the divers then operate the machine to perform the tap, under instructions from - and supervision - by hot tap technicians located on deck of the diving support vessel (DSV). Subsequent unbolting and removal of the hot tap machine is also carried out by the divers. The demands of deep water have necessitated development of a totally diver-less, remote-controlled system. Diver operations are limited to a maximum of 300 meters of water depth, whereas a significant portion of existing subsea field infrastructure, as well as projected future developments, are in deeper waters in depths up to 3,000 meters. In addition, diver safety concerns in shallow water, as well as impaired diver efficiency in difficult environmental conditions such as wave breaking zones, prompts the call for a reduction of diver exposure or complete elimination of diver assistance. The recent completion of a remote-controlled hot tap machine (Subsea 1200RC) is an important step toward developing a totally diver-less system. The installation of thehot tap assembly and subsequent removal of the machine still require diver assistance, but the performance of the tap itself is remotely controlled by a hot tap technician from the deck of the DSV. The concept is a topside-driven hot tap machine with "passive Remotely Operated Vehicle (ROV) interface", which means a stationary ROV with its hydraulics and control system is attached to the hot tap machine and operated from an onboard laptop. This results in a light weight hot tap frame and total direct control of the cutting process. The machine has been designed, built, tested and successfully deployed on a recent subsea tap for a pipeline operator in Asia. This technology promotes the "separation of man and machine" proposition. It reduces risk by reducing diver exposure, enhances safety, provides direct control and visibility from a laptop and facilitates fast and accurate execution. Ultimately, the concept may be extended toward onshore hot tap applications in risky environments calling for remotely operated systems. Diverless tapping is now also qualified and offered by others.Copyright © 2012 by ASME. Source

Lim G.,TD Williamson Inc.
Brazilian Petroleum, Gas and Biofuels Institute Rio Pipeline Conference [IBP] (Rio de Janeiro, Brazil, 9/20-22/2011) Technica

On August 4th, 2007, a cargo vessel violated the 500 meter exclusion zone and struck the unmanned gas platform located 40 miles northeast of Cromer, Norfolk, England. To repair the latter, the owner and operator of the platform contracted a project management organization based in the UK. This organization in turn recommended and contracted the services of TDW Offshore Services (TDW) for the isolation of the top section of the riser. TDW offers a range of offshore pipeline repair and maintenance solutions, including the SmartPlug® for demanding isolations of high pressure gas and liquid lines, high friction devices for low pressure isolations, hot tapping and plugging where launching of internal devices are not feasible or where flow continuity is required using temporary bypasses and other methods like freezing. TDW conducts a thorough analysis on technical, safety, operational, constructability, schedule and cost aspects in order to ensure that the most optimal solution is achieved for an expeditious and effective solution of the customer's problem. In this particular scenario, TDW devised a high friction pig solution. Source

Dum F.,TD Williamson Inc.
Brazilian Petroleum, Gas and Biofuels Institute Rio Pipeline Conference [IBP] (Rio de Janeiro, Brazil, 9/20-22/2011) Technica

The first ever STOPPLE® Train intervention operation was performed on a gathering pipeline system, raising the level of piping maintenance safety standards. Traditionally, a single ST OPPLE® plugging head would have been installed. Also, ST OPPLE® Train systems have only been previously used in plant piping and transmission pipelines. However, the STOPPLE® Train innovative method of double block and bleed can now serve the gathering pipeline market in order to meet the industry's strict safety requirements. With hundreds of thousands of oil and gas gathering lines around the globe, the only other alternative would be to shut the line and production unit down, resulting in a complete halt in production, resulting in lost revenues for gathering pipeline operators. The purpose of this paper is to demonstrate how advanced safety applications in pipeline isolations can now be applied in gathering pipeline environments. Source

Donikowski G.,TDW Service | Belange A.,TD Williamson Inc.
Pipeline Pigging and Integrity Management Conference, PPIM 2015

Groups of joints can be binned together the same type by using Pipe Identification from an MDS ILI survey in conjunction with pipe material records. Joints with out records can still be grouped and tested using Positive Material Identification on a sample set to identify the properties of the joints with in the grouping. ON GOING WORK Data, Data, Data Determine confidence levels of identifying joints using Positive Joint Identification Determine size of sample sets for PMI and the confidence of applying results from the sample to the entire population within a group. Copyright © 2015 by Clarion Technical Conferences, Tiratsoo Technical (a division of Great Southern Press) and the author(s). Source

Discover hidden collaborations