... Abstract Installation of 14,200 ft of 2 3/8-in. coiled tubing (CT) as a velocity string (VS) was performed to increase the fluid production velocity and avoid a liquid loadup problem in a gas well. After the successful installation, the well produced at economic rates for few years. Because...

... Abstract On April 2017, the well Cupiagua H42 located in Colombia was suspended due to lifting capacity which were caused by low gas-liquid ratios (GLR) despite a 5" × 4-1/2" velocity string had been hanged below Down Hole Safety Valve (Insert Valve) after original completion was run in order...

... production tubing size to enable stable gas production for continuous liquid removal. Following analysis, the appropriate solution resulted in running a velocity string (VS) as an effective means for liquid removal at current and future production conditions. The challenge was to find a hanger system, which...

... to explore the technical feasibility of mechanically joining two CT strings for velocity string (VS) projects. Challenges include making the union of these strings above the wellhead under live well conditions and the load capacity limit of the reels. The study includes design of mechanical joining tools...

... a temporary CT velocity string without ever shutting in the Tyonek formation. Also addressed in the design and execution phases were the maintenance and confirmation of well barriers, restricted centralization, inability to confirm spaceout, and unusually sized components that had to be custom designed...

... Abstract Installing coiled tubing velocity strings is a common deliquification strategy used in gas wells in which the flowrate has dropped below the critical rate required to remove produced liquids from the well. Initially in Shell’s Groundbirch unconventional gas development, a standard...

... of producing below dew point. A number of techniques employed to deliquify gas wells include deploying an artificial lift system, installation of velocity string and stimulation. Artificial lift systems can include deployment of electrical submersible pumps, progressive cavity pumps, bean pumps, plunger pumps...

... and the associated minimum achievable reservoir pressure or abandonment pressure, thereby extending economic well life and maximizing ultimate recovery. A screening study was carried out to identify candidates for installation of a velocity string. This resulted in a 20-well velocity string campaign. Velocity...

... string option using a 1 ¾ in. CT to reduce the wellbore transverse flow area, thus improving the vertical lift performance. Also, nitrogen was injected at gas rates between 1and 2 MMscf/D to simulate the combination of the velocity string and a gas injection system. The surface and downhole data...

... Abstract Installation of a small diameter velocity string (VS) is often necessary in tight gas wells to resolve liquid loading problems. Coiled Tubing (CT) is commonly used as a velocity string conduit due to safe live-well installations and speed. A technique is being applied in which wells...

... has installed 90 corrosion resistant coiled tubing velocity strings as an alternative to conventional carbon steel coiled tubing. These installations have yielded 5 mmcfd in incremental gas rate and the change to a corrosion resistant metallurgy has drastically reduced the high failure rate and costly...

... measurements associated with coiled tubing velocity strings has been found to be significant and around 6 metres. Depth confirmation is typically then carried out using slickline. As a result of the error in depth measurement and the additional depth confirmation activity during the installation...

... are techniques used to prolong production from these depleted gas wells. A wide variety of velocity and insert string operations have been performed. To date the authors' in-house experience includes a total of 32 insert/velocity strings deployments in wells offshore in the UK, and 40 in the Netherlands...

... performance phase velocity gas flow application power fluid velocity string production logging gas velocity production rate upstream oil & gas coiled tubing production monitoring flow path perforation reservoir surveillance operator liquid gas well deliquification chrome alloy...

... composition). The bottom of the CRA velocity string must be located at approximately 4215 m (within the perforated interval 4168 m to 4301 m), which is 326 m below the bottom of the existing 3-½" tailpipe. The 2-3/8" tubing string must be suspended below the two existing SV-LNs in order to maintain full...

.... The paper will conclude with a review of the strings manufactured to date with application case histories. velocity string subsurface corrosion chromium carbon steel pipeline corrosion application wet co 2 spe 81721 riser corrosion strength steel upstream oil & gas corrosion rate...

... application ct material spe 74829 constant od axial stress thickness coiled tubing operations vodct wall thickness smaller diameter liquid velocity string vodct string variation stripper john martin spe 74829 ken newman variable od coiled tubing modification society pipeline petroleum...

... intervention application application update completion equipment liner material completion installation and operations composite spoolable pipe corrosion resistance production enhancement qualification testing composite velocity string velocity string well intervention feechan connector upstream...

... holdup. The values that should be used for criteria were reviewed in SPE 30197, Modeling Coiled Tubing Velocity Strings for Gas Wells. Those criteria are used with the prediction procedure to expand the selection process to cover a wider range of coiled tubing sizes and gas-liquid flow rates. P. 111...