Method and apparatus for treatment of water for an injection well
AssigneeSørco AS
InventorDave Pinchin
Life of this patent
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Abstract
The invention concerns a method and an apparatus (10) for treatment of water (26) to be injected into a subsea injection well, the apparatus (10) being disposed in water overlying the well, preferably on a water bed (12). The invention is characterized in that the apparatus (10) contains at least one receptacle (38, 40, 46, 48, 50) provided with at least one water-soluble solid-state chemical (42, 52, 54, 56) for treatment of the injection water (26). The water (26) is brought into contact with the at least one chemical (42, 52, 54, 56), causing it to gradually dissolve and mix with the water (26), after which treated water (26′) is led into an injection stream to the injection well.
Claims21
A method for treatment of untreated injection water for a subsea injection well, said injection water being one of:
- (A) water from a body of water overlying the injection well, and
- (B) produced water from a well production stream;
- said method comprising:
- lowering a water treatment apparatus and a water injection pumping equipment connected thereto into said body of water overlying the subsea injection well,
- said water treatment apparatus comprising at least one module provided with at least one receptacle and an associated network of lines with valves for allowing flow of injection water through said receptacle and line network during water injection into subsea well, and
- said at least on receptacle being provided with at least one type of water-soluble, solid state chemical;
- connecting the water treatment apparatus and the water injection pumping equipment to the subsea injection well;
- bringing said water into contact with the at least one solid-state chemical within the at least one receptacle, thereby causing said solid-state chemical to gradually dissolve and mix with the contacting water, treated water thus emanating from said receptacle;
- and
- leading the treated water into an injection stream conveyed into the injection well and further into an associated reservoir.
An apparatus for treatment of untreated injection water for a subsea injection well, wherein the water treatment apparatus is structured for connection to a water injection pumping equipment so as to allow said apparatus and pumping equipment to be lowered into a body of water overlying the subsea injection well and then to be connected to the injection well;
- wherein said apparatus comprises at least one module provided with at least one receptacle and an associated network of lines with valves for allowing flow of injection water through said receptacle and line network during water injection into the subsea well;
- and
- wherein the at least one receptacle contains at least one type of water-soluble, solid-state chemical for treatment of the water admitted into the receptacle;
- whereby said apparatus is structured in a manner allowing untreated injection water to enter said receptacle and contact said solid-state chemical so as to gradually dissolve and mix with the contacting water, treated water thus emanating from said receptacle to be conveyed into the injection well and further into an associated reservoir.
Dependencies are inferred from the claim text.