The radial cutting torch device application due to drill string sticking

Abstract

Stuck pipe is a common problem with tremendous impact on drilling efficiency and costs in the oil industry. Generally, the stuck pipe troubles are solved after their occurrences by using some standard operational procedures such as working the drill string up or down, attempting to rotate the string and pumping mud at higher flow rates through the drill bit to aid pipe release. One may also place different fluids around the stick area and use a drilling jar. However, in cases where common solutions don't work, then the cutoff is the last resort. To have a successful cutoff operation, estimating the location of the free point and choosing the right cutting tool is of vital importance. This paper presents the Radial Cutting Torch (RCT) as a innovative cutting tool and its oilfield application in stuck pipe events.Key words: radial cutting torch, stuck pipe, cutoff Apstrakt: Zaglava alata predstavlja uobičajen problem koji u mnogome utiče na efikasnost bušenja i troškove naftne industrije. U načelu, problemi zaglave alata nakon njihovog uočavanja rešavaju se standardizovanim tehnikama, kao što su: spuštanje i zadizanje, rotiranje alata, upumpavanje isplake većim protokom preko dleta. Takođe, i primenom raznih fluida u području zaglave i upotrebom udarača. Međutim u slučajevima gde uobičajena rešenja ne daju željeni rezultat, kao poslednja opcija uzima se rezanje alata. Za uspešnu operaciju rezanja određivanje mesta zaglave i upotreba odgovarajućeg uređaja za instrumentaciju su od vitalnog značaja. U ovom radu biće prikazan radijalni plazma rezač i njegova primena na terenu kao specifičnog uređaja za sečenje zaglavljenog alata.Ključne reči: radijalni plazma rezač, zaglava alata, rezanje