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Keywords: bha
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2024
Paper Number: OTC-35320-MS
... Vibration is an intrinsic part of the drilling process, sometimes creating continuous movements and friction between the wellbore and the BHA. These interactions can be mitigated and adequately handled using roller reamers. Several roller reamers can be used in the string, depending on the design...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32508-MS
... this success in similar applications. upstream oil & gas drilling equipment bha installation directional drilling cement whipstock operation united states government operation application stub junction drilling operation whipstock abandonment operation whipstock system milling...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32203-MS
... on BHA, hole size, and parameters. Multiple modelling software are used to support this physics-based design approach. Results, Observations, Conclusions The established workflow identified a set of effective risk mitigations through bottom hole assembly (BHA) redesign, hole size change, drilling...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31965-MS
... after installation and at different periods after installation (set-up effect), underdifferent loading conditions. The test drilling rig consists of two main parts: an isostatic supporting structure and a jetting bottom hole assembly (BHA). All parts were designed to emulate real operational conditions...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31917-MS
... in recent years: high-frequency torsional oscillations (HFTO) ( Jain et. al. 2014 , Zhang et. al. 2017 ). The vibration frequency of HFTO could be identified to be in the range between ~50 Hz to above 400 Hz depending on the bottomhole assembly (BHA) and string configuration. The root cause for this type...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31713-MS
... drilling fluid property drilling fluids and materials drilling fluid formulation well intervention completion equipment production enhancement intervención de pozos petroleros completion installation and operations fluid loss control upstream oil & gas breaker treatment bha barrier valve...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31707-MS
... On the run-in-hole (RIH), the bullnose encountered a tight spot at 3,360 m and after 4 hours of trying to pass this depth, the offshore team decided to change the reaming BHA for a drilling one to assess the scenario. At this point, the first decision-making process was to determine a new BHA...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31092-MS
... underreamer offers flexibility in placement in the bottom hole assembly (BHA) and it can be used as a near bit reamer, or as main reamer or as both. In this case, the integrated near bit underreamer eliminated the need for a dedicated rathole removal run. It also offered a feedback confirmation of the cutter...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31245-MS
... with mechanical anchor and 9 -7/8-in. OD mills was sent to a test well designed to replicate the target section of the offshore well. Based on determinations made in the planning phase, milling of the window and rathole would be staged in two trips. Additionally, a replica drilling bottom hole assembly (BHA), 8...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30532-MS
... for pumping rates, HP/HT conditions, well kill fluid, milling, and cleanouts where obstructions hindered BHA penetration. The proposed best practices presented here are for primary CT operations involved in the complete PnP cycle, such as wellbore displacement, well dummy run-drift, setting the isolation...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29321-MS
... reduce the effective frictional coefficient regardless of whether the string is sliding or rotating. The DATs are sometimes used in conjunction with standalone STs, which are placed in a remote location where the DAT displacements may be out of range. Standalone STs placed at the bottomhole assembly (BHA...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27611-MS
... circulation sub was deployed above other bottomhole assembly (BHA) components, including an RFID underreamer and a conventional ball drop underreamer. This configuration enabled the operator to ream out the 22-in. cemented show track, underream the openhole section, and efficiently clean the wellbore at total...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27316-MS
... assemblies (BHAs) place a concentric hydraulic underreamer above the rotary steerable system (RSS) and measurement-while-drilling/logging-while-drilling (MWD/LWD) package. Although this placement is effective, it could leave up to 200 ft (61 m) of under gauge rathole at TD, which often leads to a dedicated...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25828-MS
..., the conductor was run from the utility side and passed to the main floor for the jetting operation. While the Jetting assembly was pulled to surface, the next conductor with BHA could be run from the utility side. This was repeated for all seven wells. The 17½ BHA was then run from the main floor and drilled...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25214-MS
.... The decision was made to perform the cement job through the 8 ½-in. Bottomhole assembly (BHA) containing measurement while drilling (MWD) and logging while drilling (LWD) tools. The combination of deepwater, riserless, potential shallow hazards and pumping through a BHA with significant restrictions made...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-23915-MS
... design, and fluid design for spacer and mud wash fluid; are issues which are considered in this method. Case history C Godøy et al. (2012) illustrated how to pump cement through bottomhole assemblies (BHA), to plug holes. This method has been used to; cure critical mud loss, plug back pilot holes...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20370-MS
... OTC 20370 Dynamic BHA Modeling of Hole Enlargement While Drilling Leads to ROP Improvement in Gulf of Mexico Myles Barrett, Shell International E&P, Molly Compton, Mukul Agnihotri, Fernando Verano, Simon Mitchell and David Fitzmorris, Smith International Copyright 2010, Offshore Technology...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20452-MS
... ¾ inch bit and below an 8 ½ inch hole-opening reamer, above which were the rest of the 6 ¾ inch LWD collars. Some tools had stabilizers to centralize the collars in the borehole. Figure 2 shows the configuration of the LWD bottom hole assembly (BHA). For additional information about the measurements...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20880-MS
... for a 13 3/8?? DCWD; World's first application of Gyro MWD with DCWD. assembly bha torque rop application otc 20880 efficiency directional platform upstream oil & gas seawater top hole section inclination operator high viscosity sweep dcwd drilling operation OTC 20880...

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