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Drilling with Cutting Blade for Debris Crushing and Zero Mud cake

IP.com Disclosure Number: IPCOM000241116D
Publication Date: 2015-Mar-27
Document File: 4 page(s) / 218K

Publishing Venue

The IP.com Prior Art Database

Abstract

A new feature of introducing an automated cutting blade in the bottom hole assembly is proposed in this publication. The rotating cutting blade is operated automatically by a sensor which senses large rock/ debris size and crushes them into smaller pieces. This new technology will be very helpful in optimizing the use of drilling fluid. Additional feature of the cutting blade includes mud cake removal from the formation face which will ultimately result in a good cementing job.

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Drilling with Cutting Blade for Debris Crushing and Zero Mud cake

Abstract:

A new feature of introducing an automated cutting blade in the bottom hole assembly is proposed in this publication. The rotating cutting blade is operated automatically by a sensor which senses large rock/ debris size and crushes them into smaller pieces. This new technology will be very helpful in optimizing the use of drilling fluid. Additional feature of the cutting blade includes mud cake removal from the formation face which will ultimately result in a good cementing job.

Description:

With the passage of time, drilling of oil or gas well is becoming more complex and challenging, as most of the easy oil has been drilled and produced. Nowadays, the wells have more complex problems, especially at greater depths and high temperature and pressure conditions. Advancement in technology is essential to cope up with the upcoming challenges and to achieve goals and objectives in the best and timely manner.

In a drilling operation, a drill bit is attached to the bottom of the drillpipe. The drill bit simply crushes, cuts or breaks apart the rock formation while drilling a wellbore. The drill bit has jets to allow the expulsion of drilling fluid, or mud, at high velocity and high pressure to help clean the bit and, for softer formations, help to break apart the rock. The drilling fluid is injected while drilling a well, to remove the rock cuttings from the well and to facilitate further drilling, along with other advantages. The rock cuttings widely vary in size which are collected and separated on the surface.

The residue deposited on a permeable medium when a drilling fluid is forced against the medium, under pressure, is the filter cake. Filtrate is the liquid that passes through the medium, leaving the cake on the medium. Filter cake formed on permeable zones in the wellbore can cause stuck pipe and other drilling problems. Reduced oil and gas production can result from formation damage when a poor filter cake allows deep filtrate invasion. A certain degree of cake buildup is desirable to isolate formations from drilling fluids.

A new feature in the Bottom Hole Assembly (BHA) is proposed. This new feature is a rotating cutting blade around the BHA, which will be located above the drill bit, along with a sensor just below the blade. The sensor will detect large rock particles that are above the specified size and will activate the blade to slide out from...