... wall thickness. Based on the corrosion's profiles, the intervention objective was to install a 16% chrome corrosion-resistant velocity string inside the production string to produce the well avoiding the exposure of those highly corroded components from the tubing. The repair intervention concept...

... production of the field by about 40%. Meanwhile, many of the wells with halite deposition issue were also suffering from liquid loading and velocity strings were isntalled in them as the primary means of gas well deliquification. Many of these wells with velocity string showed no further halite deposition...

... Abstract The installation of a smaller size tubing or velocity string inside an existing tubing completion is a well-known deliquification technique. The velocity string comes in various designs providing different functionalities for deliquification. Typically, velocity strings are installed...

... 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...

... 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...

...URTeC: 157 Production Modeling for Velocity String Applications in Unconventional Wells Suat Bagci, Tina Chang; Baker Hughes, a GE Company Copyright 2019, Unconventional Resources Technology Conference (URTeC) DOI 10.15530/urtec-2019-157 This paper was prepared for presentation...

... fracs. Coiled tubing-based nitrogen lift of the water column is not commercially feasible. It is important to find a low-cost solution for water unloading since bottom zones account for approximately 30% of total gas in place. A solution has been developed using a customized velocity string design...

... Abstract Velocity strings are routinely installed to remediate liquid loading of gas wells. However, besides restoring stable production, velocity strings also reduce well capacity, easily by up to 50%. In PDO, a sliding side door (SSD) was introduced as part of the velocity string completion...

... Velocity string installation is relatively low expenses and easy to install, compared to tubing replacement work-over job. However, this simple application deliver low success ratio based on other company's experiences ( Hutlas, 1972 ). Hence, Martinez (1998) improved the guideline to model...

.... A coiled tubing (CT) velocity string is a known method to unload liquids in gas wells; the correct choice of CT size may optimize gas well productivity. The smaller-diameter CT is installed inside the production tubing to improve gas velocity, thereby avoiding water column accumulation at the bottom...

... in an extensive deliquification campaign for gas wells thru the implementation of high end Velocity String (VS) completions. The projects involve the application of LEAN methodology from the early planning stages using in many cases re-engineering to the functional specifications, material selection...

... Abstract A successful field trial of velocity-string technology was recently completed on a standing gas well with high condensate-gas ratio (CGR) in Saudi Arabia. The operation was performed in three attempts, and it included running a 10,000-ft-long, 2 3/8-in. outside diameter (OD) coiled...

... 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...

... 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 Over the past 3 years fiber optic slickline distributed temperature measurements (DTS) have become a commonplace method of monitoring Canada’s Deep Basin commingled gas wells produced through velocity string completions. The use of velocity string completions prohibits conventional...

.... This paper details a novel application of this technology using an optic fiber embedded in a 1/8 th inch slickline cable to calculate the inflow distribution of multi-zone gas wells with velocity strings. EnCana's multi-zone gas wells in the Deep Basin of Western Canada are often completed with production...

... can cause a well to die prematurely. Various technologies are available to prevent liquid loading in gas wells. They include gas lift, intermittent production, and the installation of a velocity string. Each has applications and limitations for certain well and production conditions. Installation...

... production monitoring compression wellbore upstream oil & gas ellenburger shelton society of petroleum engineers reservoir surveillance production control velocity string march 1991 liquid column production rate completion installation and operations valve spe 24792 gas well...

... Well-4 is another example where the Velocity String installation results in extended production and increasing ultimate recovery. Prior to the workover in 2017, the well produced in liquid loading mode with decreasing uptime and finally production was stopped. The well was briefly reopened after...

... 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...