US4125983A — Method of lining an earthen tank

Claim 1

Independent Claim 197 words

Method of lining an earthen tank with a unitary membrane comprising the steps of: laying down sheets of paper to form a backing for one of a multiplicity of panels; laying down a plurality of sheets of fiber glass material on said backing with adjacent longitudinal edges of the sheets contacting each other; impregnating the fiber glass material with polyester resin thereby bonding the material to the paper; reinforcing the adjacent marginal edges of the sheets of fiber glass with an overlay of fiber glass material and impregnating the overlay with polyester resin; curing the panel and thereafter rolling the panel into a cylinder; transporting a multiplicity of the cylinders to an earthen tank; unrolling the panels while overlapping the marginal edges thereof and temporarily fastening the overlapping edges together; bonding the panels together by applying a strip of fiber glass material impregnated with polyester resin at said overlap; continuing to add additional panels to cover to bottom and sidewalls of the earthen tank until the tank is completely lines with the panels each being bonded to one another to thereby form a unitary build up fiber glass membrane which is impervious to drilling mud and brine.

Claim 2

Dependent Claim 197 words

Method of lining an earthen tank with a unitary membrane comprising the steps of: laying down sheets of paper to form a backing for one of a multiplicity of panels; laying down a plurality of sheets of fiber glass material on said backing with adjacent longitudinal edges of the sheets contacting each other; impregnating the fiber glass material with polyester resin thereby bonding the material to the paper; reinforcing the adjacent marginal edges of the sheets of fiber glass with an overlay of fiber glass material and impregnating the overlay with polyester resin; curing the panel and thereafter rolling the panel into a cylinder; transporting a multiplicity of the cylinders to an earthen tank; unrolling the panels while overlapping the marginal edges thereof and temporarily fastening the overlapping edges together; bonding the panels together by applying a strip of fiber glass material impregnated with polyester resin at said overlap; continuing to add additional panels to cover to bottom and sidewalls of the earthen tank until the tank is completely lines with the panels each being bonded to one another to thereby form a unitary build up fiber glass membrane which is impervious to drilling mud and brine.

Claim 3

Dependent Claim 31 words

The method of claim 1 and further including the step of sandblasting a marginal width of the adjacent panels at said overlap prior to bonding the adjacent panels to one another.

Claim 4

Dependent Claim 27 words

The method of claim 2 wherein the adjacent panels are temporarily fastened by using staples to fasten the panels to one another prior to the bonding step.

Claim 5

Dependent Claim 48 words

The method of claim 3 wherein the marginal peripheral edges of the membrane are made to extend horizontally away from the tank and further including the step of placing an overburden of the earthen material thereon to thereby protect the marginal peripheral edge portion of the tank liner.

Claim 6

Dependent Claim 44 words

The method of claim 1 wherein the adjacent sheets of fiber glass are limited to two sheets which are five feet wide and one hundred feet in length, and which are joined together to form a ten foot panel one hundred feet in length.

Claim 7

Dependent Claim 45 words

The method of claim 1 and further including the step of stapling the overlapping edges of said panels to one another at spaced intervals along the overlapped edges thereof; and, sandblasting the marginal area of each sheet adjacent to said overlap; thereby improving said bond.

Claim 8

Dependent Claim 177 words

Method of lining an earthen tank with a unitary membrane comprising the steps of: 1. laying down sheets of fibrous material, such as paper, to form a backing for one of a multiplicity of panels; 2. building up a layer of fiberglass material which is supported in superimposed relationship on said backing; and, 3. impregnating the layer of fiberglass material with polyester resin, thereby bonding the fiberglass material, polyester resin, and fibrous material together to form said panel; 4. curing the panel and thereafter rolling the panel into a cylinder; 5. transporting a multiplicity of said cylinders to an earthen tank; 6. unrolling the panels and bonding the adjacent edges of adjacent panels together by applying fiberglass material impregnated with polyester resin at said adjacent edges; 7. repeating step (6) in order to add additional panels to cover the bottom and sidewalls of the earthen tank until the tank is completely lined, with the panels each being bonded to one another to thereby form a unitary build-up fiberglass membrane which is impervious to drilling mud and brine.

Claim 9

Dependent Claim 177 words

Method of lining an earthen tank with a unitary membrane comprising the steps of: 1. laying down sheets of fibrous material, such as paper, to form a backing for one of a multiplicity of panels; 2. building up a layer of fiberglass material which is supported in superimposed relationship on said backing; and, 3. impregnating the layer of fiberglass material with polyester resin, thereby bonding the fiberglass material, polyester resin, and fibrous material together to form said panel; 4. curing the panel and thereafter rolling the panel into a cylinder; 5. transporting a multiplicity of said cylinders to an earthen tank; 6. unrolling the panels and bonding the adjacent edges of adjacent panels together by applying fiberglass material impregnated with polyester resin at said adjacent edges; 7. repeating step (6) in order to add additional panels to cover the bottom and sidewalls of the earthen tank until the tank is completely lined, with the panels each being bonded to one another to thereby form a unitary build-up fiberglass membrane which is impervious to drilling mud and brine.

Claim 10

Dependent Claim 28 words

The method of claim 7 and further including the step of sandblasting a marginal width of the adjacent panels prior to bonding the adjacent panels to one another.

Claim 11

Dependent Claim 30 words

The method of claim 8 wherein the adjacent panels are temporarily fastened to one another by using staples to fasten the panels to one another prior to the bonding step.

Claim 12

Dependent Claim 47 words

The method of claim 9 wherein the marginal peripheral edges of the membrane are made to extend horizontally away from the tank and further including the step of placing an overburden of earthen material thereon to thereby protect the marginal peripheral edge portion of the tank liner.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-11-20	1982-05-22	1982-11-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-11-20	1986-05-22	1986-11-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-11-20	1990-05-22	1990-11-21	$7700.00	Window Closed / Lapsed

Method of lining an earthen tank

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