TD Williamson Inc.

Tulsa, OK, United States

TD Williamson Inc.

Tulsa, OK, United States
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Belanger A.,TD Williamson Inc. | Simek J.,SALt Inc | Burden D.,SALt Inc
Pipeline Pigging and Integrity Management Conference 2017, Papers | Year: 2017

REDUCTION IN WALL THICKNESS is a constant integrity issue in pipelines. Since the 1960s inline inspection with magnetic flux leakage (MFL) tools has been used to detect the location and size of metal loss. Using axially oriented magnetizers, MFL tools created fields aligned along the axis of the pipe, as that was the most efficient method based on the pipeline's geometry and the functional requirements of the ILI tool. However these original designs had limited sensitivity to axially oriented anomalies in the pipeline wall, which often pose the greatest integrity threat. In the 1990's, new MFL tools were developed to enable improved performance for detection and sizing of axially oriented anomalies, using magnetizers with circumferentially (transverse) applied fields. A later study of velocity effects on circumferential magnetization indicated a reduction of magnetic flux in the outer regions of the pipe wall, which suggests metal loss anomalies located in that outer region may be harder to detect and resolve compared to anomalies located closer to the inner pipe wall. To enable detection and sizing of axially oriented anomalies, an oblique magnetizer design was introduced in 2009. This design allows detection and sizing of axial planar anomalies using a single magnetizing body which may then be coupled to an axial MFL tool. The oblique magnetizer creates a field in a direction between the axial and the circumferential, providing a performance vs speed de-rating profile similar to that of the axial magnetizer. This paper will present theoretical modeling and empirical testing that shows detection and sizing of anomalies, especially axial planar, are not affected by velocity in the range of a conventional axial MFL tool.

Harriss C.,TD Williamson Inc.
Pipeline Pigging and Integrity Management Conference 2017, Papers | Year: 2017

ALTHOUGH RAKE, pipeline failures that result in the release of product can have grave and costly consequences, including personal injuries; environmental impacts; expenses related to property damage, clean-up, and repair; and, ultimately, lost revenue. One of the leading causes of pipeline failure worldwide is mechanical damage. Mechanical damage is defined by API 1163 - Inline Inspection Systems Qualification Standard - as a combination of dents, gouges, and/or cold work caused by the application of external forces (1) often related to excavation activities near existing pipelines. In the United States, the Pipeline Hazardous Materials Safety Administration (PHSMA) says that damage from third parties digging in the vicinity of buried pipelines is the greatest threat to pipeline safety (2). Damage from excavation equipment generally results in immediate failure (3). However, there are notable exceptions where the aftermath of mechanical damage has been delayed by several years. This white paper focuses on a legacy 16-inch pipeline that failed as the result of backhoe damage decades earlier. It details how the use of a multiple dataset (MDS) inline inspection (ILI) platform made it possible for the pipeline owner to identify, rank in severity, and prioritize the repair with over 350 excavation damage locations.

Tisovec P.,T D Williamson Inc.
Brazilian Petroleum, Gas and Biofuels Institute Rio Pipeline Conference [IBP] (Rio de Janeiro, Brazil, 9/20-22/2011) Technica | Year: 2011

In-line inspection of carbon steel pipelines using axial magnetic flux leakage (MFL) technology has been a mainstay of inspection methods over the last 40 years. Traditional MFL tools rely on axial magnetization of the pipe which allows for good detection and characterization of general metal loss features, however, with the tradeoff of decreased ability or even inability to detect axial pipeline anomalies. Circumferential MFL (CMFL) tools magnetize circumferentially which in turn allows for good detection of axially oriented features, but along with increased tool length and complexity may not capture anomaly width appropriately, leading to potential mischaracterization of anomalies. A tool design utilizing an oblique magnetic field approaching 45 degrees has been developed to join the benefits of both traditional MFL and CMFL methods into one tool while minimizing the common drawbacks of each. This study focuses on an oblique field magnetizer tool's response within 16 inch pipe, with results from pull tests on previously in-service pipe and developmental feature sets used to explore repeatability as well as defect detection thresholds.

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

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.

Lim G.,T.D. Williamson Inc
Proceedings of the Biennial International Pipeline Conference, IPC | Year: 2012

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.

Cloyde C.J.,TD Williamson Inc.
Proceedings of the 22nd Pipeline Pigging and Integrity Management Conference | Year: 2010

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).

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

Frenier W.W.,Frenier Chemistry Consultants | Wint D.,T.D. Williamson Inc.
Society of Petroleum Engineers - SPE International Conference and Exhibition on Oilfield Corrosion 2014: New Challenges for a New Era | Year: 2014

This paper reviews the mechanisms of initiation and the prevention of TLC. Practical multi-faceted techniques based on the most recent research and developments will be described and then illustrated using documented sources to arrive at best practices for control of this significant corrosion manifestation. The application is in the complex corrosive environment in multi-phase and stratified flow pipelines (including gathering lines) that are frequently observed in new shale play production. The sizings of pipelines have become a critical factor to meet the current and future projected production rates. Especially where pipelines may be under-sized there is preferential attack in the top of the pipeline when water condenses and provides the electrolytes for acid gas and vapor attack on the steel surfaces. Conventional corrosion inhibition methods (continuous or intermittent injection) are frequently not effective since physical contact of the inhibitors is difficult to achieve in multiphase flowing systems at the top of the line. In addition, the pipelines must be piggable to be properly cleaned and treated and traditional slug or continuous treatment methods have been found to not be adequate where conditions exist for TLC to occur. Several innovative methods are being developed to provide effective and long lasting protection to the entire pipeline surface. Included are the use of pig trains with inhibitor slugs, inhibitor containing gels and foams and special pigs that provide a 360° spray of inhibitor chemicals. The newer methods will be compared with the other technologies. The rapid expansion of the production of oil and gas from unconditional sources requires the annual construction of thousands of miles of new lines. These will experience a bewildering and changing range of conditions that will require the use of new and innovative internal corrosion protection methods described here that have been proven in field applications. Copyright 2014 , Society of Petroleum Engineers.

Lim G.,T.D. Williamson Inc.
Proceedings of the Annual Offshore Technology Conference | Year: 2014

Providing effective emergency response capability and troubleshooting potential pipeline incidents in challenging operating environments, is not an easy task for offshore pipeline owners and operators. TDW has developed a number of solutions that can assist in establishing optimum response capacity. Integrity management programs are commonly in place to prevent, detect and mitigate threats to integrity that occur throughout the lifecycle of the pipelines, from construction through operations to decommissioning, but unfortunate events still occur resulting in pipeline failures which jeopardize people, environment and business. Operators are keen to have a dedicated system in place - commonly called EPRS (Emergency Pipeline Repair System) - to effectively respond to and recover from an incident. As downtime is the chief enemy, time is of the essence in dealing with an emergency and swiftly restoring flow. What clearly is needed, therefore, are the right materials, equipment, resources and construction spreads in readiness AHEAD of any emergency - anywhere, anytime. This stands in contrast to simple emergency pipeline repair, which infers putting the response in place AFTER the damage has occurred. Key attributes of an effective EPRS are its ability to cover i) all incidents, by having a comprehensive inventory of the right tools and services for the incident, ii) the full lifecycle of pipeline assets from design to decommissioning and iii) all operating areas, including inaccessible ones such as deep water or where unsafe conditions for divers prevail. This paper describes a number of remote control systems that contribute to EPRS capacity in various ways, in that they can cover the construction phase (SMARTLAY™ anti-flooding tool), deep water intervention and repair during operations (Subsea 1200RC hot tap machine, Clamp Installation Tool), SmartPlug® isolation management and integrity management, like SMARTTRACK™ pig tracking, both in deep and shallow waters. The SMARTLAY™ tool, inserted in the pipeline in strategic positions along the suspended section during pipe laying, acts as an instantaneous barrier against flooding in case of an inadvertent wet buckle, protecting the vessel from undue forces from the heavier flooded pipe and preventing costly and time consuming dewatering and re-commissioning of the just-laid pipeline. The SMARTLAY™ tool thus forms an effective component in an EPRS for the construction phase. The Clamp Installation Tool (CIT) is a lightweight, readily déployable tool run with standard work class ROVs for the installation of any size repair clamps or hot tap tees from any third party supplier. The CIT is recoverable and reusable, and its control system can be reconfigured to run other remote control equipment if required. This flexibility in application makes the CIT a versatile tool ideal for EPRS as it reduces the large inventory of an EPRS. The Subsea 1200RC remote-controlled tapping machine is another tool suitable for an EPRS kit. Combined with the CIT for tee installation, it offers a hot tap solution that not only facilitates repair in deep water, but also dramatically reduces risk to personnel and increases efficiency in unsafe diving conditions in shallow water. The SmartPlug® tool is an un-tethered inline isolation tool for isolation management of a wide range of repair scenarios where intrusive plugging is less desirable. It is remotely controlled via through-wall communication by the SMARTTRACK™ system. The latter can also be used as stand-alone pig tracking equipment for various pigging operations. The SmartPlug® system and the SMARTTRACK™ tool can therefore be deployed in a variety of services called for in an emergency. Copyright 2014, Offshore Technology Conference.

T.D. Williamson Inc. | Date: 2015-06-23

Vehicle mounted laser device for detecting methane gas in the atmosphere.

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