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Completing the Well

NOV develops 140-ksi, sour gas-resistant coiled tubing

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National Oilwell Varco (NOV) recently developed 140-ksi specified minimum yield strength (SMYS) coiled tubing, or CT140. Because the target market for high-strength tubing is high-pressure well intervention and completions, sour gas compatibility testing was performed. The testing program verified that while using chemical inhibitors, the tubing/inhibitor system was not susceptible to sulfide stress cracking. In this video from the 2017 SPE/ICoTA Coiled Tubing and Well Intervention Conference in Houston on 21 March, Kevin Elliot, NOV Product Engineering Manager, discusses the development process that was undertaken, as well as the resulting mechanical properties and fatigue life of CT140. For more information about this project, please see SPE 184806, “Development and Compatibility Testing of Coiled Tubing With 140-ksi Specified Minimum Yield Strength.”

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Coiled-tubing cementing operation on HPHT well uses MPD technique to lower costs, ensure integrity

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The number of exploration wells drilled in high-pressure, high-temperature (HPHT) environments keeps growing, spurred by the ongoing search for new oil and gas reserves. Per the Norwegian Standards Organization (NORSOK), an HPHT well has a wellhead shut-in pressure exceeding 69 MPa (10,000 psi) and an ambient temperature greater than 150°C (302°F)...

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Evolution of intelligent coiled-tubing technologies drives need for better sensors, data interpretation tools to aid real-time decision-making

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Coiled-tubing interventions, like everything else in the upstream sector, have taken a hit since oil prices tumbled in 2014. In fact, the coiled-tubing industry declined by 41% from 2014 to 2015 and by an additional 39% from 2015 to year-end 2016, according to data from Spears and Associates...

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SPE/ICoTA conference to demonstrate essential technology for production optimization

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IADC will be exhibiting at Booth #909 at the 2017 SPE/ICoTA Coiled Tubing and Well Intervention Conference, which will celebrate technology and innovation as the keys to surmounting challenges in production optimization. The event is co-sponsored by SPE and the Intervention and Coiled Tubing Association (ICoTA). The conference convenes 21-22 March in Houston.

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Chevron tests, compares single-cluster and multiple-cluster completion methods in Antelope Shale wells

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Creating multiple clusters per frac stage using the plug-and-perf method has been a common completion method for many years. However, this method can leave something to be desired when it comes to efficient treatment of each cluster, Amit Singh, Well Stimulation Specialist at Chevron, said in a presentation at the 2017 SPE Hydraulic Fracturing Technology Conference on 25 January in The Woodlands, Texas.

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CT sleeves open in 2 DUC wells after 32 months downhole

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Halliburton recently announced that two of its RapidStart Initiator CT (casing test) sleeves opened after 32 months downhole. That time period represents an industry record for the successful operation of a toe sleeve, according to the company. Murphy E&P needed to perform a true casing integrity test and had deployed the RapidStart Initiator CT frac sleeve system as an interventionless means of establishing a flow path at the toe of the well. Both sleeves opened successfully after 32 months downhole in two drilled but uncompleted (DUC) wells of more than 7,000 ft, with static bottomhole temperatures up to 215˚F. The sleeves were functional at a total pressure of 10,000 psi and provided a 30-min casing...

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New proppant transport technology targets high-salinity water applications

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Fairmount Santrol recently launched Propel SSP 350. It is an extension to the self-suspending Propel SSP proppant transport technology, which is designed to increase hydraulic fracturing efficiency in plays where produced water disposal costs are high and where there are constraints on freshwater availability. The 350 extension targets applications in high-salinity water plays, such as the Marcellus and the Permian. Its development was driven by the need for improved proppant transport and for reduced completions costs by removing the need for extra...

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