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Vis-breaking heavy crude oils for pumpability

  • US 4,883,582 A
  • Filed: 03/07/1988
  • Issued: 11/28/1989
  • Est. Priority Date: 03/07/1988
  • Status: Expired due to Fees
First Claim
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1. A method of reducing the viscosity of untreated crude oil, comprising the steps of:

  • (a) vis-breaking in a reactor a first portion of the untreated crude oil with a recycled stream to produce a partially cracked residuum of the untreated oil;

    (b) mixing the partially cracked residuum of the untreated oil with a second portion of the untreated oil to quench cracking and producing a first mixture;

    (c) separating gas, vapor, and liquid by flashing from said mixture;

    (d) condensing the gas and vapor obtained in step (c) to produce liquid hydrocarbons and gas;

    (e) splitting the liquid obtained in step (c) into first and second streams thereof;

    (f) passing said first stream obtained in step (e) for use as said recycled stream in step (a);

    (g) reacting coke produced in step (a) with superheated steam to produce a hydrogen-containing gas during regeneration cycle to the reactor; and

    (h) mixing said hydrogen-containing gas with said first stream obtained in step (e) prior to vis-breaking in step (a).

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