Hydraulic and earth engineering – Marine structure or fabrication thereof – Tension leg platform
Patent
1991-05-16
1992-09-15
Reese, Randolph A.
Hydraulic and earth engineering
Marine structure or fabrication thereof
Tension leg platform
405224, 166 68, 166107, 4174233, E02B 1702
Patent
active
051471493
ABSTRACT:
An apparatus and method are provided for dewatering an interior of a hollow tension leg connecting a tension leg platform to a floor of a body of water. The apparatus includes a pump having a suction inlet defined on its lower end and a discharge outlet on its upper end. An elongated storage tank is attached to the upper end of the pump above the pump and has a tank interior communicated with the discharge outlet. The assembly is lowered on an electric wireline through which power is conducted to the pump. The pump fills the tank and then the assembly is withdrawn from the tension leg and the water is drained therefrom. The assembly can be repeatedly lowered into the tension leg and withdrawn therefrom until the tension leg is substantially completely dewatered. Solid debris can be removed from the tension leg prior to dewatering.
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Exhibit A--Brochure of the Cavins Company entitled "Sand Pump Model `C` 33/4" O.D.--Instruction Manual and General Information (undated but admitted to be prior art.
Exhibit B--Brochure illustrating ABS sump pump Model No. CD-5W (undated but admitted to be prior art).
Craig Steven M.
Hein Norman W.
Hunter Andrew F.
Masecar Robert R.
Sandora Lee M.
Conoco Inc.
Olsen Arlen L.
Reese Randolph A.
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