Inflatable grout seal

Claim 2

An inflatable packer comprising: annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion and annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular inflatable packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said second guide ring means; first back-up shoe means adjacent the first end portion of said annular inflatable packer member means extending about the interior thereof, said first back-up shoe means being secured to said first guide ring means; and second back-up shoe means adjacent the second end portion of said annular inflatable packer member means extending about the interior thereof, said second back-up shoe means being secured to said second guide ring means.

Claim 3

The inflatable packer of claim 1 wherein said annular inflatable packer member means further comprises an annular band of material disposed about the inner periphery of the first end portion of the annular inflatable packer member means having a portion underlying said first back-up shoe means and an annular band of material disposed about the inner periphery of the second end portion of the annular inflatable packer member means having a portion underlying said second back-up shoe means.

Claim 4

An inflatable packer for use in sealing the annulus between a jacket leg or pile sleeve of an offshore platform and a pile driven therethrough, said inflatable packer comprising: annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion and annular reinforcment member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular inflatable packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said second guide ring means; first back-up shoe means adjacent the first end portion of said annular inflatable packer member means extending about the interior thereof, said first back-up shoe means being secured to said first guide ring means; and second back-up shoe means adjacent the second end portion of said annular inflatable packer member means extending about the interior thereof, said second back-up shoe means being secured to said second guide ring means; whereby said first back-up shoe means and said second back-up shoe means are deformed to seat against said pile to support said annular inflatable packer member means when said inflatable packer is inflated to seal said annulus, thereby preventing the extrusion of said annular inflatable packer member means over the second annular portion of the first guide ring means and the second annular portion of said second guide ring means.

Claim 5

An inflatable packer for use in sealing the annulus between a jacket leg or pile sleeve of an offshore platform and a pile driven therethrough, said inflatable packer comprising: annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion and annular reinforcment member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular inflatable packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said second guide ring means; first back-up shoe means adjacent the first end portion of said annular inflatable packer member means extending about the interior thereof, said first back-up shoe means being secured to said first guide ring means; and second back-up shoe means adjacent the second end portion of said annular inflatable packer member means extending about the interior thereof, said second back-up shoe means being secured to said second guide ring means; whereby said first back-up shoe means and said second back-up shoe means are deformed to seat against said pile to support said annular inflatable packer member means when said inflatable packer is inflated to seal said annulus, thereby preventing the extrusion of said annular inflatable packer member means over the second annular portion of the first guide ring means and the second annular portion of said second guide ring means.

Claim 6

The inflatable packer of claim 3 wherein said annular inflatable packer member means further comprises an annular band of material disposed about the inner periphery of the first end portion of the annular inflatable packer member means having a portion underlying said first back-up shoe means and an annular band of material disposed about the inner periphery of the second end portion of the annular inflatable packer member means having a portion underlying said second back-up shoe means.

Claim 7

An inflatable packer comprising: annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion, annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, an annular band of material disposed about the inner periphery of the first end portion thereof, and an annular band of material disposed about the inner periphery of the second end portion thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of said second guide ring means; first back-up shoe means adjacent the first end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the first end portion of said annular inflatable packer member means, said first back-up shoe means being secured to said first guide ring means; and second back-up shoe means adjacent the second end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the second end portion of said annular inflatable packer member means, said second back-up shoe means being secured to said second guide ring means.

Claim 8

An inflatable packer comprising: annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion, annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, an annular band of material disposed about the inner periphery of the first end portion thereof, and an annular band of material disposed about the inner periphery of the second end portion thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of said second guide ring means; first back-up shoe means adjacent the first end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the first end portion of said annular inflatable packer member means, said first back-up shoe means being secured to said first guide ring means; and second back-up shoe means adjacent the second end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the second end portion of said annular inflatable packer member means, said second back-up shoe means being secured to said second guide ring means.

Claim 9

An inflatable packer for use in sealing the annulus between a jacket leg or pile sleeve of an offshore platform and a pile driven therethrough, said inflatable packer comprising: annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion, annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, an annular band of material disposed about the inner periphery of the first end portion thereof, and an annular band of material disposed about the inner periphery of the second end portion thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of said second guide ring means; first back-up shoe means adjacent the first end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the first end portion of said annular inflatable packer member means said first back-up shoe means being secured to said first guide ring means; and second back-up shoe means adjacent the second end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the second end portion of said annular inflatable packer member means, said second back-up shoe means being secured to said second guide ring means; whereby said first back-up shoe means and said second back-up shoe means are deformed to seat against said pile to support said annular inflatable packer member means when said inflatable packer is inflated to seal said annulus, thereby preventing the extrusion of said annular inflatable packer member means over the second annular portion of the first guide ring means and the second annular portion of said second guide ring means.

Claim 10

An inflatable packer for use in sealing the annulus between a jacket leg or pile sleeve of an offshore platform and a pile driven therethrough, said inflatable packer comprising: annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion, annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, an annular band of material disposed about the inner periphery of the first end portion thereof, and an annular band of material disposed about the inner periphery of the second end portion thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of said second guide ring means; first back-up shoe means adjacent the first end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the first end portion of said annular inflatable packer member means said first back-up shoe means being secured to said first guide ring means; and second back-up shoe means adjacent the second end portion of said annular inflatable packer member means extending about the interior thereof overlying a portion of the annular band of material on the second end portion of said annular inflatable packer member means, said second back-up shoe means being secured to said second guide ring means; whereby said first back-up shoe means and said second back-up shoe means are deformed to seat against said pile to support said annular inflatable packer member means when said inflatable packer is inflated to seal said annulus, thereby preventing the extrusion of said annular inflatable packer member means over the second annular portion of the first guide ring means and the second annular portion of said second guide ring means.

Claim 11

An inflatable packer comprising: an annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion and annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular inflatable packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said second guide ring means; a first back-up shoe secured to said first guide ring adjacent the first end portion of said inflatable packer member means being located on the interior thereof, said first back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said first back-up shoe overlays the first end portion of said inflatable packer member means thereby preventing the first end portion of said inflatable packer member from extending into said annulus before the inflation of said inflatable packer member means to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough; and a second back-up shoe secured to said second guide ring adjacent the second end portion of said inflatable packer member means being located on the interior thereof, said second back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said second back-up shoe overlays the second said portion of said inflatable packer member means thereby preventing the second end portion of said inflatable packer member from extending into said annulus before the inflation of said inflatable packer member means to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough.

Claim 12

An inflatable packer comprising: an annular packer housing means; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion and annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular inflatable packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said second guide ring means; a first back-up shoe secured to said first guide ring adjacent the first end portion of said inflatable packer member means being located on the interior thereof, said first back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said first back-up shoe overlays the first end portion of said inflatable packer member means thereby preventing the first end portion of said inflatable packer member from extending into said annulus before the inflation of said inflatable packer member means to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough; and a second back-up shoe secured to said second guide ring adjacent the second end portion of said inflatable packer member means being located on the interior thereof, said second back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said second back-up shoe overlays the second said portion of said inflatable packer member means thereby preventing the second end portion of said inflatable packer member from extending into said annulus before the inflation of said inflatable packer member means to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough.

Claim 13

An inflatable packer for use in the sealing of an annulus formed by a jacket leg and/or pile sleeve of a marine platform having a pile inserted therethrough prior to the grouting of said annulus, or the like, said inflatable packer comprising: an annular packer housing means secured to said jacket leg, said pile sleeve, or the like; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion and annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular inflatable packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said second guide ring means; a first back-up shoe secured to said first guide ring adjacent the first end portion of said inflatable packer member means being located on the interior thereof, said first back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said first back-up shoe overlays the first end portion of said inflatable packer member means thereby preventing the first end portion of said inflatable packer member means from extending into said annulus before the inflation of said inflatable packer to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough; and a second back-up shoe secured to said second guide ring adjacent the second end portion of said inflatable packer member means being located on the interior thereof, said second back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said second back-up shoe overlays the second said portion of said inflatable packer member means thereby preventing the second end portion of said inflatable packer member means from extending into said annulus before the inflation of said inflatable packer member means to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough whereby when said inflatable packer member means is inflated to seal said annulus, said inflatable packer member means is inflated inwardly so that the intermediate portion thereof firmly engages said pile to seal said annulus while said first back-up shoe and said second back-up shoe have the plurality of fingers thereof deflected inwardly until seated on said pile thereby lending axial support to said inflatable packer member means and preventing axial extrusion of the first end portion and second end portion of said inflatable packer member means over said first end ring and said second end ring respectively during the inflation of said inflatable packer member and the grouting of said annulus.

Claim 14

An inflatable packer for use in the sealing of an annulus formed by a jacket leg and/or pile sleeve of a marine platform having a pile inserted therethrough prior to the grouting of said annulus, or the like, said inflatable packer comprising: an annular packer housing means secured to said jacket leg, said pile sleeve, or the like; first guide ring means secured within said annular packer housing means, said first guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; second guide ring means secured within said annular packer housing means, said second guide ring means including a first annular portion having one end secured to the interior of said annular packer housing means and a second annular portion secured to the other end of the first annular portion, the second annular portion having an inner diameter larger than the inner diameter of the first annular portion, an outer diameter smaller than the outer diameter of the first annular portion, a substantially uniform cross-sectional thickness, and substantially uniform uninterrupted interior and exterior surfaces thereon; annular inflatable packer member means having a first end portion, intermediate portion, a second end portion and annular reinforcement member means extending substantially throughout said annular inflatable packer member means terminating in the first and second end portions thereof, the first end portion secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said first guide ring means while the second end portion of said annular inflatable packer member means is secured from axial movement within said annular packer housing means by being bonded to the uniform uninterrupted exterior surface of the second annular portion of said second guide ring means; a first back-up shoe secured to said first guide ring adjacent the first end portion of said inflatable packer member means being located on the interior thereof, said first back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said first back-up shoe overlays the first end portion of said inflatable packer member means thereby preventing the first end portion of said inflatable packer member means from extending into said annulus before the inflation of said inflatable packer to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough; and a second back-up shoe secured to said second guide ring adjacent the second end portion of said inflatable packer member means being located on the interior thereof, said second back-up shoe comprising: an annular band having a plurality of fingers extending therefrom, each finger of the plurality of fingers being separated from an adjacent finger thereby forming a space between each adjacent finger of the plurality of fingers whereby said second back-up shoe overlays the second said portion of said inflatable packer member means thereby preventing the second end portion of said inflatable packer member means from extending into said annulus before the inflation of said inflatable packer member means to prevent said pile from damaging said inflatable packer member means during the insertion of said pile therethrough whereby when said inflatable packer member means is inflated to seal said annulus, said inflatable packer member means is inflated inwardly so that the intermediate portion thereof firmly engages said pile to seal said annulus while said first back-up shoe and said second back-up shoe have the plurality of fingers thereof deflected inwardly until seated on said pile thereby lending axial support to said inflatable packer member means and preventing axial extrusion of the first end portion and second end portion of said inflatable packer member means over said first end ring and said second end ring respectively during the inflation of said inflatable packer member and the grouting of said annulus.