A frac tank adapted for vehicular transport and field storage of a liquid, comprising two parallel, elongated, hollow, intersecting cylinder sections that are capped at the longitudinal ends. Each section has an arcuate wall defining a cross-section of greater than 180°, a major diameter, and a mino
A frac tank adapted for vehicular transport and field storage of a liquid, comprising two parallel, elongated, hollow, intersecting cylinder sections that are capped at the longitudinal ends. Each section has an arcuate wall defining a cross-section of greater than 180°, a major diameter, and a minor diameter at the ends of the arcuate wall, wherein the ends of the arcuate wall of each section are sealingly joined to form the tank wall. The joined ends of the arcuate walls form inwardly directed cusps along the length of the tank with the major diameters spaced apart on either side of the cusps.
대표청구항▼
1. A frac tank extending between longitudinal ends, comprising: two elongated hollow sections, each section having an imperforate arcuate section wall defining an arcuate wall of greater than 180 degrees in cross section from one end of the arcuate section wall to another end of the arcuate section
1. A frac tank extending between longitudinal ends, comprising: two elongated hollow sections, each section having an imperforate arcuate section wall defining an arcuate wall of greater than 180 degrees in cross section from one end of the arcuate section wall to another end of the arcuate section wall, a major diameter, and a minor diameter at the ends of the arcuate section wall, whereinthe tank is composed of a plurality of longitudinally abutting and welded rings, each ring composed of two opposed segments welded together, with one segment forming a portion of one section and the other segment forming a portion of the other section, each segment having an arcuate segment wall defining a cross section of greater than 180 deg. from one end of the arcuate segment wall to another end of the arcuate segment wall, a major diameter, and a minor diameter at the ends of the arcuate segment wall, with the ends of the arcuate wall of each segment sealingly joined and with the ends of the arcuate wall of each section sealingly joined; anda cap is provided at each longitudinal end of the tank. 2. The tank of claim 1, wherein each opposed segment has a flange extending inwardly from each end of the arcuate segment wall, and the flanges of one segment are welded to the flanges of the opposed segment. 3. The tank of claim 2, wherein the flanges as welded form a support plate that joins the ends of the arcuate segment walls of both segments. 4. The tank of claim 3, wherein the support plate of each ring is welded to the support plate of an adjacent ring. 5. The tank of claim 1, wherein the tank has top and bottom longitudinal ends, and an L frame skid has a relatively longer leg joined to an exterior surface of the wall of one section and another, relatively shorter leg supporting the bottom end of the tank. 6. The tank of claim 1, wherein the major diameter is eight feet and a maximum transverse dimension tm through the centers of both sections is 12 feet. 7. The tank of claim 1, wherein a plurality of said tank is arrayed in upright position on a pad;each tank has a maximum transverse dimension tm through the centerlines of the joined sections that is 50% greater than the major diameters Da and Db of the respective joined sections;one row of a plurality of said tanks is arrayed adjacent to and in parallel with another row of a plurality of said tanks;the maximum transverse dimension of each tank of said one row is linearly aligned with the maximum transverse dimension of a tank in said other row;the respective major diameters Da and Db of each section are equal; andthe respective minor diameters da and db of each section are equal and congruent. 8. A method for fabricating a frac tank formed as two parallel, elongated, hollow, intersecting cylinder sections, comprising: fabricating a plurality of metal rings, each ring composed of two opposed segments, with one segment forming a portion of one cylinder section and the other segment forming a portion of the other cylinder section, each segment having an arcuate wall defining a cross section of greater than 180 deg., a major diameter, and a minor diameter at the ends of the arcuate wall;sealingly joining the ends of the arcuate wall of each segment to produce a plurality of said metal rings;means for reinforcing each metal ring between the ends of the arcuate walls of the respective opposed segments;joining the rings to form an elongated tank wall having open ends; andcapping the open ends of the tank wall. 9. The method of claim 8, wherein, each opposed segment has a flange extending inwardly from each end of the arcuate wall;the flanges of one segment are welded to the flanges of the opposed segment;whereby the flanges as welded form a support plate that joins the ends of the arcuate walls of both segments and provides said reinforcing means. 10. An array of adjacently spaced frac tanks extending vertically between top and bottom longitudinal ends, wherein each frac tank comprises: two elongated hollow sections, each section having an imperforate arcuate wall defining a cross section of greater than 180 degrees from one end of the arcuate wall to another end of the arcuate wall, a major diameter, and a minor diameter at the ends of the arcuate wall, wherein the ends of the arcuate wall of each section are sealingly joined and thereby join the sections;a valve at the bottom end of the tank; further whereinwhen viewed longitudinally, the joined sections form intersecting parallel cylinders having respective spaced apart centerlines, with inwardly directed cusps formed at the minor diameters, along the length of the tank, and with the major diameters passing through the respective centerlines;a perforated support plate extending between the ends of the segments thereby joining the cusps along the length of the tank;the ends of each arcuate wall span an included angle within a range of 200-250 degrees around the respective centerlines;a plurality of said tank is arrayed in upright position on a pad exposed to weather; andeach tank has a top cap angled to shed precipitation and a bottom cap angled downwardly toward said valve. 11. The tank of claim 10, wherein each tank has a maximum transverse dimension tm through the centerlines of the joined sections that is greater than the major diameters Da and Db of the respective joined sections;one row of a plurality of said tanks is arrayed adjacent to and in parallel with another row of a plurality of said tanks; andthe maximum transverse dimension of each tank of said one row is linearly aligned with the maximum transverse dimension of a tank in said other row. 12. The tank of claim 11, wherein the respective major diameters Da and Db of each section are eight feet in length;the respective minor diameters da and db of each section are equal and congruent; andthe maximum dimension tm across the tank through the centers of both sections is 12 feet. 13. The tank of claim 12, wherein two rows of six tanks each are arrayed on one pad.
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이 특허에 인용된 특허 (1)
Stannard James H. (Basking Ridge NJ), Fabricated pressure vessel.
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