Invention Grant
- Patent Title: Direct pullback devices and method of horizontal drilling
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Application No.: US14181545Application Date: 2014-02-14
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Publication No.: US09719344B2Publication Date: 2017-08-01
- Inventor: Eric Melsheimer
- Applicant: Melfred Borzall, Inc.
- Applicant Address: US CA Santa Maria
- Assignee: Melfred Borzall, Inc.
- Current Assignee: Melfred Borzall, Inc.
- Current Assignee Address: US CA Santa Maria
- Agency: Fitch, Even, Tabin & Flannery LLP
- Main IPC: E21B47/12
- IPC: E21B47/12 ; E21B10/60 ; E21B7/04 ; E21B7/20 ; E21B7/28 ; E21B10/633 ; E21B17/05

Abstract:
An apparatus for horizontal directional drilling includes a housing and a sonde transmitter mounted in the housing. The housing includes a main fluid channel to permit a flow of a fluid therethrough. The apparatus further includes a fluid outlet at the front of the housing in communication with the main fluid channel and adapted to emit fluid. from the front of the housing during pilot bore operations. The housing further includes a plurality of fluid ports in fluid communication with the main fluid channel and adapted to emit fluid from the housing during pullback operations. Drill bits, drill bit adapters adapters, swivel connectors, and tow heads adapted to be coupled to the drill bits for direct pullback operations, as well as methods of direct pullback operations during horizontal direction drilling are also provided.
Public/Granted literature
- US20150233183A1 DIRECT PULLBACK DEVICES AND METHOD OF HORIZONTAL DRILLING Public/Granted day:2015-08-20
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