System, method and apparatus for drilling agitator

a technology of agitator and agitation tool, which is applied in the direction of drilling machine and method, earth drilling and mining, construction, etc., can solve the problems of agitation tool inability to compensate, further amplification of friction problem, and costly premature failure of other down hole equipment, so as to facilitate the axial movement of the drill string

Inactive Publication Date: 2012-03-01
1473706 ALBERTA
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  • Abstract
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  • Application Information

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Benefits of technology

[0009]Embodiments of a system for facilitating axial movement in a well comprises a drill string having a drill bit and a drilling agitator as described herein. Embodiments of method of facilitating axial movement of a drill string while drilling a well comprises operating a drill string in a well in a dynamic mode; detecting an axial accelerat

Problems solved by technology

The friction problem is further acerbated when a directional drilling assembly is used in a steering mode.
At that point, the sudden increase of weight at the bit can cause the mud motor to stall, forcing the operator to pick up and remove a portion of the weight.
As the drilling conditions change (e.g., weight on bit, mud flow rate, formation, bit type, e

Method used

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  • System, method and apparatus for drilling agitator
  • System, method and apparatus for drilling agitator

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Embodiment Construction

[0022]Embodiments of a system, method and apparatus for facilitating axial movement of a drill string while it is drilling a well are disclosed. It is desirable to maintain movement in a drill string during its operation since the dynamic friction force is substantially less than the static friction force. As horizontal sections of current oil and gas wells increase, the incurred friction forces hamper and affect efficient drilling operations. One method for maintaining continuous movement of the drill string is to utilize a shock tool as an agitating device that is driven by a cyclic pressure wave. The shock tool has an incorporated seal surface that can be extended as pressure increases. The shock tool or agitator contracts when the pressure level decreases.

[0023]The frequency and duration of these pressure fluctuations determines the displacement and acceleration of the shock tool. It is desirable that the movements of the shock tool are controlled to prevent damage to the drilli...

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PUM

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Abstract

A drilling agitator tool, system and method facilitates axial movement of a drill string in a well. The tool has a valve assembly that provides pulses of fluid pressure in the drill string. A valve control assembly controls a frequency and pressure amplitude of the pulses induced by the valve assembly. The valve control assembly monitors real-time pressure and vibration levels of the drill string. An agitator assembly reciprocates in response to the pulses of fluid pressure to provide axial movement of the drill string in the well.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Disclosure[0002]The present invention relates in general to drilling oil and gas wells and, in particular, to a system, method and apparatus for facilitating axial movement of a drill string while it is drilling a well.[0003]2. Description of the Related Art[0004]Some oil and gas well bore profiles focus on horizontal well bore sections that increase the interface or surface area with the producing formation. As the length of the horizontal section increases, steps must be taken to reduce the friction or sticking force on the drill string. It is desirable to minimize these forces by maintaining the string in a dynamic mode as it moves axially through the well.[0005]The friction problem is further acerbated when a directional drilling assembly is used in a steering mode. During steering mode, the drill string is typically held in a relatively stationary orientation as weight is applied and only the bit is rotated. When hole friction is...

Claims

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Application Information

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IPC IPC(8): E21B44/02E21B44/00E21B4/00E21B7/24
CPCE21B7/24E21B2023/008E21B47/187E21B28/00E21B23/001E21B47/24
Inventor SEUTTER, DANIELRADMANOVICH, DONALD J.
Owner 1473706 ALBERTA
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