Abstract

The present paper describes the prize to be gained when thorough feedback and co-operation between operator and service company are made a priority during the application of new tools in the oilfield. A real life example is provided to highlight how solution driven discussion and prompt detailed data sharing can enable service companies to develop new tools faster and cheaper to satisfy operator needs of tool reliability and accuracy.

In July 2007, BP field-tested the impact tool during a memory PLT campaign in an onshore oilfield, UK. The impact tool is a memory gauge that is capable of logging downhole P/T information, tool-string angle and bi-directional impact resulting from jarring activities.

While this trial was the first-time run of this tool within BP, across the industry it was the third application just in the North Sea. Yet during the job it became obvious that there was a need for further improvement of the tool in areas of tool function and set-up. Intensive discussion with the tool-provider on future enhancements of the tool commenced while operations were still going on. Based on this close co-operation, the vendor was able to develop solutions and implement them in the tool within weeks.

The paper will provide insights into the project planning, share the relevant details of the operational phase and conclude with the obtained learning which lead to the enhancement of the impact tool. Since implementation of the modifications, the tool has shown excellent results and outstanding performance in recent field-operations.

Introduction

Recently, BP North Sea has adopted the mindset of exploring 'game changing' technologies for its technology advancements within the well services and well intervention disciplines (Ref 1.) This identifies with the evauation of emerging technologies for further development following strict citeria such as HSE benefits, value benefits or applicability. With applying this process, BP took the decision to operate at a tactical level to pursue technologies which deemed to significantly improve levels of safety and efficiency at the work site. Once projects for technology development have been defined, experience shows that dedicated commitment to technology development as well as the ability to work closely with service providers help to accelerate products into the market place.

The present paper gives an example where BP applied this mindset and supported the development of a new technology with substantial commitment. The technology discussed is an impact tool developed by a Houston based vendor.

The impact tool is a slickline conveyed memory gauge which, depending on the chosen logging mode, measures downhole pressure and temperature as well as tool-string angle plus upward and downward jarring impacts. The impact gauge offers the ability to analyze forces and stresses on the toolstring, thus enabling the operator to determine the best solutions for slickline interventions and bottom hole assembly configurations.

When BP took the impact tool to the first field-trial, very little operational experience had been gained from the emergying technology. BP's initial approach was to run the tool and compare the gathered data to reference data from routinely used standard tools. However, severe issues occurred in this first intervention and it became obvious that further development efforts had to be invested into the tool.

Since the first trial, further field trials and a considerable amount of fault investigation have been done. In return, major break throughs were achieved in areas such as power management, firmware and design of the tool. Thanks to the combined efforts of service company and operator, the impact tool is now in a position to reliably deliver crucial information back to surface.

This content is only available via PDF.
You can access this article if you purchase or spend a download.