... with similar chemistry will be detailed. Note that the results of separate tests conducted on the pipe body and bias welds will be compared and detailed. A brief summary of the service providers record of global sour pipe operations will illustrate these practices have proved suitable in the field...

... Abstract "Pure" fatigue failures (i.e. not started by corrosion or mechanical damage) are not common in coiled tubing strings because of the implementation of systems/models to manage the fatigue life. However, in recent years, a series of "pure" fatigue failures occurred on bias welds of high...

... Abstract This paper examines techniques necessary to fish coiled tubing (CT) with internal weld seams in a live well environment without back pressure valves (BPVs) using a hydraulic workover unit (HWO). The challenges of placing barriers in internal seamed CT verses using the slip and shear...

... tubing manufacturing characteristics such as the longitudinal seam, bias welds, and orbital (butt) welds were also considered. From this fit-for-purpose testing, not only was the preferred corrosion-resistant material, Nitronic 19D duplex-steel, selected for the coiled tubing strings, but an operating...

... frequently manifest in bias welds present in certain portions of the coiled tubing string, affecting both fatigue life and potentially operational safety. It has long been understood that higher wall thicknesses improve the fatigue performance of coiled tubing, including bias welds. However, higher wall...

... change along the length of the CT. When the process is used for multiple CT strings, statistical metrics about the strings can be mined from a web based database. weld fatigue model prediction Upstream Oil & Gas calculation axial strain Coiled tubing operations curvature prediction...

... and operations butt weld sensitivity coiled tubing operations inspection artificial intelligence stanley spe weld mfl requirement magnetic flux leakage reference standard spe 141944 imperfection ovality society of petroleum engineers mfl signal indication gouge Introduction The API...

..., such as the effect of different sour environments severities, performance of anti-cracking (H 2 S) inhibitors, effect of pre-fatigue, butt-welds and bias welds performance, and tensile strength integrity. The results have led to changes in the current operating procedures regarding CT strings management and CT...

... assessments of tubing, both from the outside and from the inside are given. We have also produced technology for the measurement of internal coating thickness in coiled line pipe. Additionally, we have used phased array ultrasonic technology for the inspection of seam and butt welds in coiled tubulars...

... Abstract In its earliest days Coiled Tubing (CT) suffered from unreliability due to low cycle fatigue and inconsistent material performance. With the introduction of the continuous milling process utilizing the bias weld geometry to join lengths of flat strip before forming the tube...

... stripper element stripper fail-safe mode Completion Installation and Operations injector transition tube diameter gripper circuit cylinder hydraulic pressure Coiled tubing operations gripper block todct unit todct extrusion fracture accumulator full-scale testing weld development butt...

... and operations butt weld gripper circuit injector stripper circuit stripper extrusion weld petroleum engineer alice diameter full-scale testing transition coiled tubing system society todct testing requirement tapered od coiled tubing system accumulator Introduction The basic concept...

... bonding. The probability now exists to monitor all joining processes via the nondestructive acoustic emission technique, advanced ultrasound, and to eliminate the conventional tube-to-tube butt weld. coiled tubing operations detection transducer artificial intelligence theoretical fatigue life...

... as fatigue-cycled tubing. Fatigue cycling of the QT-900 test string was performed on a pressure bending fatigue machine with tubing samples cycled from 33% to 75% of average tested fatigue life. Test specimens were taken from parent metal, bias weld, seam weld (ERW), and butt weld locations. As a result...

... installed and operated an electromagnetic strip inspection device and removed many strip surface imperfections, and a phased-array ultrasound (PAUT) system for weld-seam/heat-affected zone (HAZ) inspection of new tubing for the detection of typical seam anomalies. In order to inspect butt-welds quickly...

... for incoming strip inspection, and the results of strip inspection over a 4-month period. In addition, work included operational design of a phased-array shear wave ultrasound system capable of inspecting continuously tapered CT and the results over a 3-month period. The results of tests of butt-welds...

... tests, mechanical properties; inclusive of strength, hardness, full body low cycle fatigue and surface property attributes. The product range depicting diametrical and wall thickness ranges will be reviewed. The paper will include manufacturing issues such as forming, welding and inspection techniques...

... to introduce new inspection techniques that will help assure a higher level of performance of coiled tubing strings. The enhanced inspection techniques being instituted include inspection by the tubing manufacturer of the incoming strip and continuous phased-array ultrasonic inspection of the seam weld...

... intervention weld inspecting coiled tubing entry angle society pipe weld inspection method and result line pipe upstream oil & gas thickness Introduction Nondestructive Testing (NDT) offers some new, and several well-developed techniques for assuring product integrity in the coiled tubing...

... Abstract Coiled Oilfield Tubing (CT) continually finds new markets, and has experienced continued growth in extended reach wells and high-pressure service. One major improvement is in the quality possible at skelp end welds, when continuously tapered strip 1 is employed to join strip...