Drilling

The Industry Challenge:

Geothermal energy is a proven “green” energy technology in areas of the world where high temperature hydrothermal sources are close to the earth’s surface, such as Iceland, New Zealand and California. 

These resources, however, are scarce and rarely located near centres of major power consumption, limiting their impact on the global power generation need. Some attempts have been made to develop Enhanced Geothermal where there are no natural high temperature sources near...

Abstract

In the spring of 1998, BJ Sevices and Total Oil Marine carried out an "HP Intervention Feasibility Study" for the reliable entry of a high pressure gas well using 1¾" 100 ksi Coiled Tubing. The research was prompted by the requirement to use Coiled Tubing to enter Triassic wells on the Alwyn North platform in the North Sea for post frac cleanout operations among other service requirements. Potential wellhead pressures of 7,500 psi and operating depths of 6,000 metres meant that a...

Abstract

A multi-year joint industry program (JIP) has been completed involving an experimental testing program to evaluate the fitness-for-purpose of high-strength low-alloy steel coiled tubing (CT) in underbalanced drilling of sour oil and gas wells. The primary focus is the cold-worked material response to sour well conditions when subjecting the tubing to multiple cycles of plastic tension and compression strains in the range of 2% to 3%. The material performance and/or degradation...

Abstract

A two-year comprehensive effort to design, test, manufacture, and deploy a new high-pressure completion tubular for Chevron's deep-water Gulf of Mexico operations is presented. The completion application expected harsh, aggressive loading modes and high pressures to be encountered. The major challenge was to design, test and manufacture a subsea completion string that would provide efficient hydraulics during the fracturing operations while ensuring mechanical and pressure integrity.

Re...

The Industry Challenge:

Drilling cuttings accumulate in the borehole which increase the torque required to drill, eventually leading to shut down due to high torque.

Once shut down occurs, additional drill cuttings settle around the bottomhole drilling assembly, making it difficult to restart drilling.

When this occurs, drillers have a number of options, including: rotating, pushing/pulling, circulating and changing the properties of the drilling fluid to try and free the stuck drill pipe.

The...

The Industry Challenge:

Drilling operations in Arctic waters are typically required to have the capability to drill a relief well in the same season, should the drillers lose control of the well.

The conventional method for guaranteeing this is to have a second drilling rig on standby for all arctic drilling operations, which significantly increases costs, often making Arctic drilling unattractive.

How We Help:

C-FER used a quantitative risk approach to evaluate the performance of various well...