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Thrust control apparatus

A kind of equipment and thrust technology, which is applied in the direction of drilling equipment, earthwork drilling, drill bits, etc., and can solve the problems of low bending stiffness and reduced ability to control the direction of the drill bit.

Inactive Publication Date: 2005-03-23
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the lower bending stiffness, and the circumferential looseness of the spline coupling, the directional control ability of the drill bit is also reduced below.

Method used

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Examples

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Embodiment Construction

[0026] While the present invention may be used in a variety of situations, preferred embodiments of the present invention may be incorporated into a drilling tool suitable for forming a wellbore in an earth formation. It should be appreciated, however, that the apparatus described below is only one of many to which the present invention may be advantageously applied.

[0027] see first figure 2 , figure 2 A bottom hole assembly (BHA) is shown positioned within a wellbore 22 formed in a formation 24 having a wall 26 and a bottom 28 . Exemplary BHA devices are discussed in U.S. Patent Application Serial No. 09 / 081,981, filed May 20, 1998, entitled "Well System" and filed December 20, 1999, entitled "Three Dimensional US Patent Application No. 09 / 467,588 for Steering System. Both applications are incorporated herein by reference for all purposes. The BHA 20 includes a drill head 30, a testing device 32, a mud motor 34, a tractor 36 and other auxiliary devices 38 such as rem...

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PUM

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Abstract

A thrust absorber (130) is interposed between a thrusting means (80) and an anchoring means (60) that cooperate to axially displace another member (30). The thrust absorber (130) includes an enclosure (64) fixed to the anchor mea ns (60) and a retainer (62) connected to the thrusting means (80). A biasing member (136) is operably associated with the retainer (62). During an overthrust condition, the thrusting means (80) imparts a thrust force to the member (30), but the member (30) is not substantially axially displaced. In such a condition, the biasing means (136) absorbs the thrust that the thrusting means (80) would otherwise impart to the member (30). A dampener (92) is also included to dampen the movement of the thrusting means (80) and anchoring means (60) when the anchoring means (60) is no longer anchoring th e thrusting means (80).

Description

technical field [0001] The present invention generally relates to downhole tools for controlling thrust generating components. More specifically, the present invention relates to apparatus for absorbing thrust generated by a downhole tool with a mud motor and / or propulsion system. Background technique [0002] It is well known that the exploitation of underground hydrocarbon deposits requires mine structures drilled to depths of hundreds or thousands of feet. One known system provided for well drilling activities includes a bottomhole assembly (BHA) tethered to surface support equipment by flexible umbilicals. The BHA may be a self-propelled system that utilizes earth and rock drill bits suitable for fragmenting formations to form boreholes. One such system is described in US Application No. 09 / 081,981, entitled "Well System", filed May 1998, which application is hereby incorporated by reference for all purposes. The system preferably includes a drill bit, a downhole devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/00E21B17/07
CPCE21B17/07
Inventor 艾伯特·C·奥德尔三世杰伊·M·埃皮克
Owner HALLIBURTON ENERGY SERVICES INC