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Interactive Energy Flow Evaluation for Downhole Drilling

IP.com Disclosure Number: IPCOM000236359D
Publication Date: 2014-Apr-22
Document File: 2 page(s) / 8K

Publishing Venue

The IP.com Prior Art Database

Abstract

A software that derives an energy overview along the length of the wellbore from surface (starting at the pumps and top drive/kelly, or even the generators) to bit depth. Input data can be from various sources: Downhole and/or surface measurements, manual inputs, modeling, (automated) offset data. Different types of - energy sources (e.g. Top Drive, Surface Pumps, heat and pressure in the formations), - energy converters (e.g. downhole motors, jars, turbines, pulsers), - and processes that convert or dissipate energy to heat or vibration are quantified either in real-time or at the planning or post-well stage. Optionally this is visualized in an energy over measured depth chart that is updated with every new input. This could be used in a number of ways to optimize drilling, increase ROP, and reduce NPT. E.g. it could show where the biggest energy losses are, point to problems such as balling or vibration in the drillstring, or identify and characterize a formation change. When updated in real time, this can then be reacted against. When used in planning, tools and parameters can be optimized to allow for highest instantaneous ROP.

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Interactive Energy Flow Evaluation for Downhole Drilling

A software that derives an energy overview along the length of the wellbore from surface (starting at the pumps and top drive/kelly, or even the generators) to bit depth. Input data can be from various sources: Downhole and/or surface measurements, manual inputs, modeling, (automated) offset data. Different types of - energy sources (e.g. Top Drive, Surface Pumps, heat and pressure in the formations), - energy converters (e.g. downhole motors, jars, turbines, pulsers), - and processes that convert or dissipate energy to heat or vibration are quantified either in real-time or at the planning or post-well stage. Optionally this is visualized in an energy over measured depth chart that is updated with every new input. This could be used in a number of ways to optimize drilling, increase ROP, and reduce NPT. E.g. it could show where the biggest energy losses are, point to problems such as balling or vibration in the drillstring, or identify and characterize a formation change. When updated in real time, this can then be reacted against. When used in planning, tools and parameters can be optimized to allow for highest instantaneous ROP.

Currently energy efficiency for downhole drilling is not looked at as a whole. "Energy in equals energy out" is an existing concept that so far is not quantified in the industry for the entire drilling process. Only detail aspects are looked at; e.g. Mechanical Specific Energy (MSE) at the bit, respective Power curves, or processes that is based on MSE. What is new with this concept is the methodology to look at all the energy during drilling - not just the part considered useful, but all the losses, too. It puts the different types of energy into context of each other. It visualizes size- and logical relationships. That enables one
- to estimate values of missing energy types from the gaps in the total energy at that position in the wellbore.
- for drilling optimization, identify where the lion's share of the energy losses is and hence where the greatest opportunity for improving ROP lies.
- to quantify and allocate losses of energy and hence identify and quantify performance inhibitors.

The respective software could be used as a planning tool, a failure analysis tool, a real-time drilling optimization tool.

E.g. in conjunction with case-based-reasoning / pattern recognition/ or other software categories such as those giving realtime advice, this energy flow software could h...