Drill string tubular component

A tubular, component technology, applied in drill pipe, drill pipe, casing, etc., that can solve problems such as stopping the drilling process, slowing down, and hindering the movement of the drill string.

Active Publication Date: 2014-07-02
NXG TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Settling of cuttings out of suspension during their upward transport within the annulus is often problema

Method used

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  • Drill string tubular component
  • Drill string tubular component
  • Drill string tubular component

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0064] Referring now to the drawings, the drill string tubular member includes a central tube T having a downward hole end and an upward hole end (see figure 1 ), and at those ends, there are usually corresponding boxes and pin connectors for connection into the drill string. Typically, the tube is placed in a bottom hole assembly (BHA) adjacent to the drill bit, and the tube T may optionally be a heavyweight drill collar or heavyweight drill pipe known for these purposes. The interface and pin connector at the end of the tube T generally have an outer diameter greater than the nominal outer diameter of the tube T between the two ends. In the example shown, the nominal outer diameter of the central section of the tube T is generally 5-7 / 8". The tube T generally includes a 5-7 / 8" heavyweight drill pipe.

[0065] On the outer surface of the tube T, there are usually three collars including radial protrusions. At the end of the downward hole, the at least one first axial impeller i...

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PUM

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Abstract

A drill string tubular component for use in an oil or gas well, in the form of a tubular having a central bore and a mechanism for mobilising drill cuttings comprising at least one radial impeller (30) configured to apply radial thrust cuttings passing it, the radial impeller being located between first and second axial impellers (10, 20) configured to apply axial thrust to the fluids in opposite directions. Typically helical components of the first and second axial impellers extend in respective opposite directions, typically toward the radial impeller. Fluids are thus diverted radially away from the outer surface of the tubular component, and thereby enter a more turbulent region of the annulus, there reducing the tendency of the drill cuttings to settle out of suspension.

Description

technical field [0001] The present invention relates to apparatus and methods for circulating cuttings in a wellbore. Background technique [0002] In wellbore drilling, a drill bit is mounted on the end of a drill string, which consists of a length of tubing joined in an end-to-end fashion. The drill string is typically rotated as a whole from a surface drilling rig to provide rotation for the drill bit to cut into the formation. During drilling, fragments of rock and earth (cuttings) are produced as the drill bit cuts into the formation. These cuttings need to be removed from the interface between the drill bit and the formation and transported back to the surface. This is usually accomplished by pumping drilling fluid down through the internal hollow borehole of the drill string, out through the bit and back up the annulus between the drill string and the hole so that the cuttings Suspends within the flow of fluids and carries them away from the bit and back to the sur...

Claims

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Application Information

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IPC IPC(8): E21B17/22E21B17/10
CPCE21B21/00E21B17/1078E21B17/22E21B37/00
Inventor K·马霍茨基
Owner NXG TECH LTD
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