Field Demonstration of a New Method for Making Drill-Pipe Connections during Managed-Pressure Drilling Operations

2011 ◽  
Author(s):  
Rachel Lynn Johnson ◽  
Julio Cesar Montilva ◽  
Mohamed Fagir Sati ◽  
Jeffery L. Grable ◽  
Saad Saeed ◽  
...  
Keyword(s):  
Drill Pipe ◽  
New Method ◽  
Managed Pressure Drilling ◽  
Drilling Operations

scholarly journals A new method for correcting temperature log profiles in low-enthalpy plays

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Sandra Schumacher ◽  
Inga Moeck
Keyword(s):  
Input Parameter ◽  
New Method ◽  
Geothermal Resources ◽  
The North ◽  
Deep Wells ◽  
Thermal Disturbance ◽  
Drilling Operations ◽  
Crucial Information ◽  
Well Data ◽  
Drilling Time

Abstract Temperature logs recorded shortly after drilling operations can be the only temperature information from deep wells. However, these measurements are still influenced by the thermal disturbance caused by drilling and therefore do not represent true rock temperatures. The magnitude of the thermal disturbance is dependent on many factors such as drilling time, logging procedure or mud temperature. However, often old well reports lack this crucial information so that conventional corrections on temperature logs cannot be performed. This impedes the re-evaluation of well data for new exploration purposes, e.g. for geothermal resources. This study presents a new method to correct log temperatures in low-enthalpy play types which only requires a knowledge of the final depth of the well as an input parameter. The method was developed and verified using existing well data from an intracratonic sedimentary basin, the eastern part of the North German Basin. It can be transferred to other basins with little or no adjustment.

An Innovative Fluid Pressure Transmission Pill Successfully Used During Managed-Pressure Drilling Operations in an HTHP Environment

2008 ◽  
Author(s):  
Egil Ronaes ◽  
Ole Iacob Prebensen ◽  
Renate Mikalsen ◽  
Knut Taugbol ◽  
Svein Syltoy ◽  
...  
Keyword(s):  
Fluid Pressure ◽  
Managed Pressure Drilling ◽  
Pressure Transmission ◽  
Drilling Operations

Experimental and Numerical Study of Motion of Rotating Drill Pipe Owing to Magnus Effect

2019 ◽  
Author(s):  
Tomoya Inoue ◽  
Hiroyoshi Suzuki ◽  
Tokihiro Katsui ◽  
Keita Tsuchiya ◽  
Yusuke Notani
Keyword(s):  
Analytical Model ◽  
Rotational Speed ◽  
Numerical Study ◽  
Flow Direction ◽  
Drill Pipe ◽  
Ocean Current ◽  
Gas Drilling ◽  
Pipe Model ◽  
Magnus Effect ◽  
Drilling Operations

Abstract During riserless drilling operations conducted in some scientific drillings and the initial stages of all oil and gas drilling operations, drill pipe motions such as vortex induced vibration, whirl motion, and motion due to the Magnus effect are generated. The last motion represents an interesting and important phenomenon that generates a lift force in addition to a drag force due to the ocean current and the rotation of the drill pipe. Accordingly, this study focuses on the drill pipe motions owing to the Magnus effect. An analytical model of a drill pipe was established by applying an absolute nodal coordinate formulation (ANCF) that can capture the behavior of a relatively flexible and long pipe, such as a drill pipe. The lifting and drag forces are calculated using computational fluid dynamics (CFD), and the lift and drag coefficients are calculated for several different drill pipe rotational velocities and ocean current velocities. A series of model experiments were conducted in a towing tank, with changing water flow velocities and rotational speed of the drill pipe model to observe the corresponding changes in the Magnus effect and to measure the resulting drill pipe motions. Additionally, the resulting drag and lift forces were measured. It was observed from the experiments that the motions in the cross-flow direction increased as the rotational speed of the drill pipe model increased, and that the lifting force increased as the rotational speed increased. The drill pipe motions were then simulated using a previously established analytical model and the results of the CFD simulations. The results of the simulations were evaluated against the results of the experiments, and reasons for observed discrepancies are discussed.

A Computational Model for Drilled Cutting Transport in Air (or Gas) Drilling Operations

1986 ◽  
Vol 108 (1) ◽  
pp. 8-14 ◽  
Author(s):  
M. P. Sharma ◽  
D. V. Chowdhry
Keyword(s):  
Computational Model ◽  
Carrying Capacity ◽  
Drill Pipe ◽  
One Dimensional ◽  
Gas Drilling ◽  
Solids Suspension ◽  
Solid Suspension ◽  
Air Drilling ◽  
Drilling Operations ◽  
Flow Stream

The hydrodynamics of isothermal, one-dimensional gas-solids suspension is theoretically analyzed. A computational model is developed. The model is applied in predicting the pressure drop distribution in air-sandstone mixture flows through a vertical annular space (simulating the flow stream between a bore hole and a drill pipe). The model can be applied to any isothermal, one-dimensional flow of gas-solid suspension. The numerical results are in satisfactory agreement with the experimental data collected from studies done on drilled cutting carrying capacity of air in air-drilling operations.

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