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Keywords: velocity string
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Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 24–25, 2020
Paper Number: SPE-199837-MS
... 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 24–25, 2020
Paper Number: SPE-199864-MS
... 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 24–25, 2020
Paper Number: SPE-199834-MS
... 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 26–27, 2019
Paper Number: SPE-194228-MS
... performed 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 21–22, 2017
Paper Number: SPE-184759-MS
... then cut at surface and pressured up with nitrogen to fire the perforating guns. This allowed the Hemlock formation to be tested through 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 25–26, 2014
Paper Number: SPE-168294-MS
...) and weld configuration in formed tube (c) 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 25–26, 2014
Paper Number: SPE-168258-MS
... 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 26–27, 2013
Paper Number: SPE-163905-MS
... production, will need to be evaluated. To avoid early abandonment of these offshore assets, well deliquification or liquid unloading techniques, like Velocity String (VS) installations, are considered for extending the operating life of these mature fields. Large diameter (2 3/8 and 2 7/8-in.) chrome coiled...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 26–27, 2013
Paper Number: SPE-163920-MS
... ESP-PCP >14,000 >600 >350 Not applicable Velocity string with coiled tubing >19,000 >50 to 100 >550 Applicable Table 3 Temperature and Pressure gradients measured with the downhole sensors CT depth (ft) BHP (psi) BHT (°F) WHP (psi) Pressure Gradient...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference and Exhibition, April 5–6, 2011
Paper Number: SPE-143298-MS
... VS. 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...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 23–24, 2010
Paper Number: SPE-130632-MS
... Lobo Field in South Texas because of problems experienced due to CO 2 corrosion with standard coiled tubing metallurgy. Since 2004, ConocoPhillips has installed 90 corrosion resistant coiled tubing velocity strings as an alternative to conventional carbon steel coiled tubing. These installations have...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, April 1–2, 2008
Paper Number: SPE-113907-MS
... 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 of the...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 20–21, 2007
Paper Number: SPE-107048-MS
... 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 and the...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition, April 12–13, 2005
Paper Number: SPE-93586-MS
... formation damage caused by many well-killing methods can reduce the production potential of already marginal wells. A Coiled Tubing velocity string can often prove a quick and cost-effective method of assisting in water unloading.The ability to work in live well conditions avoids damaging the formation...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition, April 12–13, 2005
Paper Number: SPE-94193-MS
... associated liquid production increase; in particular when gas velocity is insufficient to carry entrained liquid droplets to surface, these wells will "load up" and die. Many technologies exist to improve liquid removal from gas wells; some permit continuous flow such as velocity strings or capillary tubing...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition, April 8–9, 2003
Paper Number: SPE-81721-MS
... extended development program and commitment to capital to produce a CRA coiled tubing product. As the industry has progressed, used strings have found second homes as velocity strings to economically extend a well's natural producing life. Operators wishing to improve reliability in the performance of...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition, April 9–10, 2002
Paper Number: SPE-74829-MS
... tapered strings have been built by attaching standard CT sizes such as 11/4" and 11/2". These strings have been used for special applications, most notably as velocity strings. One of the authors is currently involved in a project to develop transition pieces approximately 12 feet long that would...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing Roundtable, March 15–16, 1998
Paper Number: SPE-46053-MS
... and operations composite spoolable pipe corrosion resistance production enhancement qualification testing feechan connector halliburton energy sewice resistance downhole intervention application application update completion equipment composite velocity string velocity string well...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing Roundtable, March 15–16, 1998
Paper Number: SPE-46030-MS
... and liquid 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...

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