Reduced skin friction bore casing
First Claim
1. A reduced skin friction bore casing for driving into soils, said reduced skin friction bore casing comprising:
- said bore casing having a longitudinal axis, a first end and a second end, an exterior surface and an interior surface, said exterior and said interior surfaces being cylindrical and defined by said first and said second ends, said exterior surface and said interior surface being concentric about said longitudinal axis; and
a friction reduction coating adhered to a first portion of said exterior surface with enough strength and abrasion resistance to withstand abrasion forces applied to said bore casing during driving operations into the soils.
1 Assignment
0 Petitions
Accused Products
Abstract
A preferred embodiment of the reduced skin friction bore casing is particularly suited for driving into, and removal from, soils. Preferably the bore casing is composed of a material such as steel, and includes both an exterior and interior surface that are substantially concentric about a longitudinal axis. A friction reduction coating is applied to portions of both the exterior and interior surfaces with enough strength and abrasion resistance to withstand abrasion forces applied to the bore casing during driving operations into the soils as well as extraction when required.
-
Citations
45 Claims
-
1. A reduced skin friction bore casing for driving into soils, said reduced skin friction bore casing comprising:
-
said bore casing having a longitudinal axis, a first end and a second end, an exterior surface and an interior surface, said exterior and said interior surfaces being cylindrical and defined by said first and said second ends, said exterior surface and said interior surface being concentric about said longitudinal axis; and
a friction reduction coating adhered to a first portion of said exterior surface with enough strength and abrasion resistance to withstand abrasion forces applied to said bore casing during driving operations into the soils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35, 37, 38, 39)
-
-
13. A method of reducing skin friction on a bore casing configured for insertion into soils, comprising the steps of:
-
providing a bore casing of constant size and shape along a longitudinal axis, having an interior surface and an exterior surface;
determining a portion of said exterior surface to contact the soils;
adhering a friction reduction coating to said portion of said exterior surface with enough strength and abrasion resistance to withstand the abrasion forces applied to the pile during insertion operations into the soil; and
inserting said bore casing into the soil.
-
-
24. A reduced skin friction bore casing for driving into soils, said bore casing comprising:
-
said bore casing having a longitudinal axis, a first end and a second end, an exterior surface and an interior surface, said exterior surface and said interior surface being cylindrical and defined by said first end and said second end, said exterior surface and said interior surface being concentric about said longitudinal axis; and
a friction reduction coating applied to entire said exterior surface.
-
-
29. A method of reducing skin friction on a bore casing configured for insertion into soils, comprising the steps of:
-
providing a bore casing of constant size and shape along a longitudinal axis, having an exterior surface and an interior surface; and
applying a friction reduction coating to a portion of said exterior surface and a portion of said interior surface.
-
-
36. A reduced skin friction bore casing for driving into soils, said reduced skin friction bore casing comprising:
-
said bore casing having a longitudinal axis, a first end and a second end, an exterior surface and an interior surface, said exterior and said interior surfaces being cylindrical and defined by said first and said second ends, said exterior surface and said interior surface being concentric about said longitudinal axis; and
a friction reduction coating adhered to a portion of said exterior surface with enough strength and abrasion resistance to withstand abrasion forces applied to said bore casing during driving operations into the soils, said friction reduction coating being a corrosion inhibitor.
-
-
40. A method of reducing skin friction on a bore casing configured for insertion into soils, comprising the steps of:
-
providing a bore casing of constant size and shape along a longitudinal axis, having an exterior surface and an interior surface;
applying a friction reduction coating to a portion of said exterior surface and a portion of said interior surface, wherein said friction reduction coating adheres to said exterior surface and said interior surface with enough strength and abrasion resistance to withstand the abrasion forces applied to said bore casing during insertion operations into the soils;
inserting said bore casing into the soils;
filling said inside volume of said bore casing with fluid concrete; and
extracting said bore casing from said soils. - View Dependent Claims (41, 42)
-
-
43. A method of installing concrete piers in the ground, comprising the steps of:
-
providing a bore casing of constant size and shape along a longitudinal axis, having an exterior surface and an interior surface;
adhering a friction reduction coating to at least a portion of the interior surface that is to receive liquid concrete, wherein the friction reduction coating adheres to the interior surface with enough strength and abrasion resistance to withstand the abrasion forces applied to the interior surface during withdrawal of the casing from about wet concrete;
inserting the bore casing into the ground;
filling at least a portion of the inside volume of the bore casing with concrete in liquid form;
extracting said bore casing from the ground and about the liquid concrete with the friction reduction coating providing a slip plane between the conduit and the liquid concrete. - View Dependent Claims (44, 45)
-
Specification