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API RP 92S Managed Pressure Drilling Operations - Surface Back-pressure with a Subsea Blowout Preventer, First Edition
standard by American Petroleum Institute, 09/01/2018
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API RECOMMENDED PRACTICE 92S FIRST EDITION, SEPTEMBER 2018
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These guidelines (recommended practices) prepared by the IADC Underbalanced Operations and Managed Pressure Drilling (UBO/MPD) Committee, consisting of representatives from various IADC member companies, represent a composite of the practices employed by various operating companies, service companies, and drilling contractors in managed pressure drilling operations. In some cases, a reconciled composite of the various practices employed by these companies was utilized. This publication is under the jurisdiction of the American Petroleum Institute, Drilling and Production Operations Subcommittee.
Managed pressure drilling operations are being conducted with full regard for personnel safety, public safety, and preservation of the environment in diverse conditions such as urban sites, wilderness areas, ocean platforms, deep water sites, very hot barren deserts, cold weather areas, including the arctic environment and wildlife refuges. As tools and equipment continually improve and develop, the technology has been applied in many geological formations, including oil and gas reservoirs and on sour wells, thus driving the need for globally accepted standards and safe operating best practices.
Managed Pressure Drilling Operations—Surface Back-pressure with a Subsea Blowout Preventer
This document provides information for planning, installation, testing, and operation of wells drilled with surface back-pressure (SBP) managed pressure drilling (MPD). This document applies only to drilling rigs with subsea blowout preventers (BOPs).
This document addresses situations where the total drilling operation is performed balanced or overbalanced, including both hydrostatically overbalanced (no supplemental surface pressure needed to control inflow) and hydrostatically underbalanced (supplemental surface pressure needed to control inflow) systems. For underbalanced operations refer to API 92U.
Installation, testing, and use of BOPs and associated secondary well control equipment are similar to conventional drilling operations and are not included in this publication. This equipment should only be used during routine MPD operations (e.g. seal element changeout) if an adequate risk assessment has been performed. Refer to API 53 for information regarding installation and testing of BOPs in a conventional drilling operation.
This document contains no normative references. For a list of documents associated with API 92S, see Bibliography.
For the purposes of this recommended practice, the following terms and definitions apply.
The depth in the wellbore that a constant annulus pressure is intended to be kept.
Barrier element that is shared between the primary and secondary barrier envelopes.
A manifold used to facilitate the distribution of fluids into and out of the well.
Pressure range between the higher of pore/collapse pressure and fracture/fluid losses pressure.
Equivalent circulating density is the effective density of the circulating fluid in the wellbore resulting from the sum of the pressure imposed by the static fluid column, friction pressure, and surface back-pressure.
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