.... Hourglass CT string was engineered to strategically position the heaviest wall thickness at the heel section, with minimum thickness along the lateral. Extended-reach tool (ERT) was also added to the tool string to improve reachability, with the generated vibrations aiding in dispersing any plug debris...

... Abstract Coiled Tubing (CT) Arctic Units on the North Slope of Alaska typically use CT string sizes ranging from 1 1/4 in. to 2 in. outside diameter (OD) size. Recent projects and drilling programs demand longer laterals wells that require 2 3/8 in. CT OD leading to the need to design larger CT...

... enables flood operations, pig runs, cleaning processes, gauging, and hydrotests of a production pipeline. The approach supports a small footprint, enables the use of smaller vessels, increases speed, and reduces operational costs. During the project, results confirmed the efficacy of using two CT strings...

... successfully, with all objectives safely achieved. However, on occasion, unforeseen and evolving wellbore conditions can lead to stuck CT events. If unable to free the CT string from the stuck point, established recovery methods are well documented for standard CT strings. However, when considering telemetry...

... well intervention downhole intervention pipe completion installation and operations incident well control ct string production enhancement coiled tubing operations bha calculation nitrogen initial recovery method debris differential sticking overpull recovery method final recovery...

... of the packers were the CT string configuration, well conditioning and BHA. Considering that the core of the intervention depended not only on the ability to deliver shifting force (28-klbf) to packers set at depths with ~35-degree and ~85-degree, but also the ability to apply higher shifting force (42-klbf...

... deployment. CT strings were designed to reach target intervals with sufficient weight on bit (WOB), suitable for sour environment, and able to withstand high pumping rates with mild circulating pressures. To address the hazards of H 2 S handling at surface, a custom-fit closed-loop system was deployed...

... evaluated to boost manufacturing capabilities that will allow to build multipurpose CT strings configurations with larger operating envelopes that can perform well across a variety of wellbore designs and target depths, including the recent record of 50,000-ft. Over the past five years, highly engineered...

... materials circulation sequence learning pooh underflush proppant packer stimulation intervention execution well-a fracturing fluid completion installation and operations ftct differential pressure reverse circulation bha stmf well-b sleeve 1 reverse cleanout ct string flow rate...

..., continuously, and automatically. real time system completion installation and operations artificial intelligence upstream oil & gas joint probability distribution machine learning coiled tubing operations covariance matrix ukf framework noise ct string coefficient bayesian inference...

... from 5,000 to 8,200 ft. Each of the 95 fracturing stages was isolated by dissolvable plugs. The CT pipe design considered well trajectories, working pressures, and downhole environment. The highly engineered 22,000 ft, 2 3/8-in. CT string was manufactured with quench and tempered (Q&T) material...

... nozzle with integral forward jetting sub. Reverse circulation will enter via a large diameter, inverted single flapper check valve. In the event that forward progress is limited, the solids can be circulated out of the CT string and then forward pumping will close the check valve and divert flow via...

... considerations may be considered: CT string design and pumped fluid flow rate when fracturing. From a CT service company perspective, the fluid dynamics of the pumped fluid may contain uncontrolled variables such as fluid density, viscosity, and slurry from job-to-job. As a result of the limitations noted above...

... and converts that to a dynamic friction form along the CT string. The continuous hydraulic agitation reduces the onset of helical buckling and thus reduces CT helical contact points, resulting in lower resistance force. The development, design, and lab testing for the HDAT has been through extensive...

... that improve efficiencies. The application of high strength quench and tempered material with specific wall configurations that feature the use of the thickest gauge used in a working CT string, and the newest taper technology that transitions through four nominal wall thicknesses within couple hundred feet...

... as possible to prevent irreparable reservoir damage. Corrosion Inhibition Completion Installation and Operations Upstream Oil & Gas Production Chemistry Drilling Equipment Corrosion Management gas well hydraulic disconnect connector CT string pipe ram well control equipment Coiled tubing...

... companies would require temporary laydown of equipment. The crane was unable to lift any of the CT string options however; all other lifts were within capacity. Operations would be conducted within deck loading restrictions. Should nitrogen be required, six tanks could be placed on the supply vessel...

... encountered while using this technology is the buckling of the CT string. It can occur when the axial compressive load acting on the CT string exceeds the critical buckling loads, especially in highly deviated/horizontal and extended reach wells. Moreover, this issue becomes more critical when using non...

... fracturing Completion Installation and Operations intervention Upstream Oil & Gas unconventional project machine learning Coiled tubing operations lateral length od ct CT intervention wellbore complex reservoir string design CT string frac port initiator sleeve friction reduction...

... of the friction coefficient (CoF) between the CT string and the completion and the different forces exerted in the string. This understanding has become vital to predict the feasibility of reaching the bottom of the well, because the plugs must be milled out and the well cleaned out after the stimulation...