«Onshore and offshore oil and gas well construction»

Efficiency of using cement slurry back cutting-off to reduce accidents during fastening of operational liners

UDC: 550.822
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Orenburg, Russia
² RusGazBurenie, Moscow, Russia

Keywords: cementing, wellbore wiper drifting, casing string running, waiting for cement to harden, reverse cutting, buffer, drilling out the cement cup, accidents reduction, liner hanger

Annotation:

The author of the article considers an important technological process of casing strings, which consists of operations of an open wellbore wiper drifting, casing strings lowering, cementing, waiting for the cement slurry hardening and subsequent drilling out of the cement cup for the purpose of the wellbore further deepening. This stage of work is rather critical, since if technical and technological errors are allowed, the well may not be accepted for operation by the subsoil user, which may, in turn, entail the implementation of expensive repair and insulation operations or re-drilling of the wellbore. The author of the article examines in detail the technological process of wells cementing and proposes to apply the experience of reverse cutting of cement slurry to obtain design values of density during its washout at the wellhead using the example of the Kharasaveyskoye gas condensate field.

Bibliography:

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