Penetration Perforation Research Articles

Oil well perforation technology: Status and prospects

Abstract Perforation is a key link in well completion. To meet the development requirements of different types of oil and gas fields, after over ten years of research and development, a series of perforation methods and matching processes have been established, such as deep penetration shaped perforation, composite perforation, directional perforation etc, which on the one hand improve the result and efficiency of perforation completion and stimulation, on the other hand prolong the service life of reservoir by protecting the reservoir. Meanwhile, the optimization of perforation design and the improvement of perforation check method further enhance the safety and success rate of perforation, and make the perforation test process and field application more standardized. For unconventional tight oil and gas reservoirs, deep−ultra-deep reservoirs, thin and poor reservoirs, reservoirs with edge or bottom water, staged fracturing of horizontal wells, and re-perforating of old wells, perforation techniques such as 3D perforation, ultra-deep penetration perforation, and high temperature high pressure perforation, and supplement perforation etc should be studied according to the features of the specific oil and gas reservoir and well.

The Research of a Drill Bit for Underground Casing Drilling in Radial Water Jet Penetration Perforation

The drill bit for underground casing drilling was taken as object of study, and systemic research have been done for N80 casing drilling in Radial water jet deep penetration perforation. A new drill bit was designed after researched the actual drilling conditions, the characteristic of current commonly used drill bits and the property of blades edge materials. The reasonable original-edge angle, cutting parameters have been obtained for the new drill bit. We choose some other commonly used drill bit, and then contrast experiments result have been done by the new drill bit. The test results show that the new drill bit have the advantages of centering reliable, drilling smooth and sub-chip completely, and it can meet the requirements of the down hole casing drilling.