... from the liquid in the well and produced via the annulus (casing venting). However, in the case of self-flow an additional mechanical barrier at the wellhead is required. Current experience of operating the Phase-1 wells demonstrates the wells are capable of self flow for 72 hours after steam...

... lift valve in these installations is critical. The pump was placed at a deeper depth and gas lift valves were designed at different depths above the pump. In the first well, very good self-flow through the annulus was observed for 6 days, and the pump was kept stopped. When the self-flow ceased...

... for unconventional wells have utilized a tubing flow design. In this configuration, gas is injected down the casing-tubing annulus. It is then injected through a gas lift valve, where it mixes with the produced fluids and flows to the surface up the tubing. A typical tubing flow completion is illustrated in Figure...

... shares different designs, a modeling methodology and real-life assessment cases of such deep-set velocity strings, to achieve deliquification across the tubing completion above the reservoir and the liner completion straddling the reservoir. The proposed designs provide different flow options by changing...

... Insert Chambers Designs After a liquid slug surfaces, the injection gas in the tubing exhausts into the flowline and the flowing BHP in the chamber decreases. The SV opens when the pressure in the chamber is less than the reservoir pressure beneath the SV. The liquid in the casing annulus below...

...) in the development of a new technology instrument not previously available on the market. Introduction - The Well Integrity Challenges of the B Annulus The annulus of an oil well is the space between two concentric objects, such as between the wellbore and casing or between casing and tubing, where fluid can flow...

.... There are no significant changes in annulus specification between adjacent compartments. 6. The maximum number of packers is independent of their location. Further Considerations The AFI design may be influenced by further parameters; e.g. ensuring that the maximum allowable annular flow velocity is not exceeded. Case...

... of the tubing hanger, and an isolated annulus flow with the annulus gate valve packaged inside the tubing hanger. This technology allows operators to run tubing hangers like casing hangers, without need for field orientation. Stack-up tolerance concerns and lead impression measurement trips are also eliminated...

... in a production string to reduce APB (Annular Pressure Build-up) effects. This event happens when production flow is heating any well confined annulus causing its fluid expansion and increasing pressure inside it. In this way, annular pressure build up can lead casing collapse or burst even, in an exteme...

... operation evolution Upstream Oil & Gas envelope integrity annular barrier casing design isolation verification table scp verification expansion pressure installation society of petroleum engineers well integrity application well annular barrier flow potential well construction...

... of more than 400 tubing straddles set since 1985. SPE paper 104055 showed that the majority of straddles were installed over damaged gaslift valves and gaslift mandrels. Damage to a gaslift valve can occur when it is eroded (or flow cut) due to fluid unloading of the casing by tubing annulus through...

... there were 14 separate occasions when the annulus temperature data provided an alert to the operations staff (who were otherwise unaware) that the well had stopped flowing for reasons not associated with the subject trial. They were alerted in each case and went to visit the wellsite to bring the well back...

... the Maximum Allowable Annulus Surface Pressure (MAASP) and to monitor for any changes in the nature of the SAP. In addition to the obvious increased risks associated with a pressurized annulus, where only a single barrier to flow exists, other significant risks are also, often unknowingly, accepted...

... rate; X = duration of main flow) The modelling and sensitivity study showed that excessive APB could occur for a closed 9-7/8 and/or a closed 13-3/8 annulus. For open annuli, as per well design, there would be no uncontrolled APB phenomenon as any excessive fluid expansion would leak off...

... The purpose of the element is to prevent flow of formation fluids between formation zones or to surface within the annular space between liner/casing strings * C. Design, construction and selection 1 ) The element shall be qualified and tested in accordance to the principles given within...

... 681 to 753m. Several leading technologies were implemented in this project, such as highly integrated subsea PLEM, high reliable design for first deep water application of a newly developed multiphase flow meter (MPFM), light-weight mudmat and heavy PLEM J-Mode installation etc. The Liuhua 29-2 field...

... for special setting tools, procedures or personnel. The tool was run as part of the string and the cement job was pumped as per design. The SEP did not increase ECD during the job. No cross flow occurred after the cement job was performed. 9 5/8" x 13 3/8" casing annulus isolation A southern...

... threshold) A workover executed by a LWI vessel can typically be in the 3 Million US$ and increase to 50+ Million US$ for HWO done by a rig ASV reduces the annulus A volume of gas as well as hinders any leaks from the GLV to flow to the wellhead Gives a positive HSE effect - less gas to surface in case...

.... The check valve is installed (threaded) into the annulus line valve replacement (VR) profile. A flow tube hydraulic actuator used to hydraulically open the check valve. It also facilitates pressure bleed off from the "A" annulus for integrity testing of the gas lift valves installed in the completion...

... is defined as the Sustained Casing Pressure (SCP) . SCP is the result of either flow from a formation open to the annulus (absence of a barrier), or a barrier failure that creates an unintended flow path. A flow path could result from a tubing connection leak, packer leak, surface or sub-surface...