Resources Contact Us Home
Horizontal drilling method

Image Number 3 for United States Patent #6109828.

A bore hole support system is formed from a flexible liner that is readily everted within a bore hole and forms a bore hole support system to install a casing in the bore hole while supporting the bore hole walls. After a pilot hole is drilled, the pilot hole is traversed with a reamer to form the pilot hole diameter to a larger diameter for the final bore hole. The flexible liner with the attached casing is everted and pressurized behind the reamer as the reamer traverses the pilot hole to support walls defining the bore hole while pulling the casing into the bore hole. The liner is simply removed from a storage and everting canister and remains with the casing in the bore hole. In certain circumstances, the liner may be coated with a water soluble material so that the casing may be in fluid communication with the bore hole walls when the coating has dissolved.

  Recently Added Patents
System and method for reliable packet data transport in a computer network
Deflection device for a scanner with Lissajous scanning
Image forming apparatus and method for making density correction in a low resolution image based on edge determination
Submersible remote smoke sensor
Synchronous rectifier network unit circuit and method
Method and apparatus for monitoring wireless communication in hearing assistance systems
Electronic device, display, image processing apparatus and electronic calculating apparatus
  Randomly Featured Patents
Method of assembling a carriage assembly
Vascular prosthesis
Film coating apparatus
Pour-in-place flexible polyurethane foam articles
Security package
Communication system, communication terminal and communication method
Large-current circuit board and method therefor
Optical fiber having at least one Bragg grating obtained by writing directly through the coating covering the cladding
Method and arrangement to control the heat balance of fuel cell stacks in a fuel cell system
Device for controlling grippers in sheet-fed rotary presses