US 2005/0087254 A1 · Carrying method of crude oil and naphtha by dirty/crude oil carrier, and transfer method of the crude oil and naphtha from the carrier

Abstract

To provide a transfer method of crude oil and naphtha, in which one piping is used to transfer the naphtha and crude oil to a storage tank from a carrying tank in batches. To use a piping 53 to transfer a naphtha 3 to tanks 6 for the naphtha from inboard tanks 11, a method comprises: connecting the piping 53 to the tanks 4 for the crude oil; calculating the amount of the crude oil 2 remaining in the piping 53 beforehand; discharging the naphtha 3 from the inboard tanks 11; measuring the discharge amount; and stopping the discharge of the naphtha 3, changing to the tanks 4 for the crude oil, and restarting the discharge of the naphtha 3 based on a flow analysis of a mixed fluid 7 including the crude oil 2 and naphtha 3 in the piping 53, when the discharge amount of the naphtha 3 is substantially the same as the pre-calculated amount of the remaining crude oil 2.

Claims14

Dependent claims

A carrying method of naphtha using a carrier which carrying crude oil, comprising the steps of:

designating at least some of a plurality of carrying tanks disposed in said carrier as tanks for carrying the naphtha;
washing the inside of said carrying tank for carrying the naphtha before loading the naphtha;
and
draining the crude oil from at least a piping on said carrier during loading or unloading of the naphtha to load or unload said naphtha.

1 more element

A method of carrying crude oil and naphtha with a common carrier and transferring the crude oil and naphtha to a storage tank from a carrying tank by one piping, comprising the steps of:

(1) using said piping to discharge the naphtha or crude oil to said storage tank from said carrying tank, while said piping is connected to a tank for the crude oil or naphtha;
(2) calculating an amount of the crude oil or naphtha remaining in said piping via which said carrying tank is connected to the storage tank beforehand;
(3) discharging the naphtha or crude oil from said carrying tank, and measuring a discharge amount;
(4) stopping the discharging of the naphtha or crude oil from said carrying tank and changing a receiver tank to the tank for the naphtha or crude oil from the tank for the crude oil or naphtha, when the discharge amount of the naphtha or crude oil from said carrying tank is substantially the same as the pre-calculated amount of the crude oil or naphtha remaining in said piping;
and
(5) restarting the discharging of the naphtha or crude oil from said carrying tank after changing said tank, and storing naphtha or the crude oil into the tank for naphtha or the crude oil.

3 more elements

Dependencies are inferred from the claim text.

Carrying method of crude oil and naphtha by dirty/crude oil carrier, and transfer method of the crude oil and naphtha from the carrier

Life of this patent

Carrying method of crude oil and naphtha by dirty/crude oil carrier, and transfer method of the crude oil and naphtha from the carrier

Life of this patent

Abstract

Claims14