Recovery of production fluids from an oil or gas well
AssigneeDES Enhanced Recovery Limited
InventorsIan Donald, James Steele, John Reid
Life of this patent
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Abstract
A method and assembly for recovering fluids from, or injecting fluids into, a well having a christmas tree; the fluids typically flow between first and second flowpaths in a continuous path. The assembly may be located within the main bore, or a side passage of the christmas tree. Embodiments of the invention allow the fluids to be fed to a processing apparatus, (e.g. a pump or chemical injection apparatus) for treatment, before being returned to the christmas tree. Optionally, the assembly may include a pump located inside the christmas tree body.
Claims28
A tree for a well, having:
- a first flowpath;
- a second flowpath;
- and a flow diverter assembly providing a flow diverter means to divert fluids from a first portion of a first flowpath to the second flowpath, and means to divert fluids returned from the second flowpath to a second portion of the first flowpath for recovery therefrom via an outlet of the first flowpath, wherein the first portion of the first flowpath, the second flowpath and the second portion of the first flowpath form a conduit for continuous passage of fluid;
- wherein the flow diverter assembly is located in the first flowpath and separates the first portion of the first flowpath from the second portion of the first flowpath.
A christmas tree having an outlet and flow diverter means to divert production fluids from a production bore via a second flowpath to treatment apparatus, and to return the fluids to the tree for recovery from the tree outlet.
A method of injecting fluids into a well having a christmas tree, the christmas tree having a first flowpath which has an inlet, and a second flowpath, the method comprising passing fluids into the christmas tree by the inlet of the first flowpath, diverting the fluids from a first portion of the first flowpath to the second flowpath and diverting the fluids from the second flowpath back to a second portion of the first flowpath.
A method of recovering and re-injecting production fluids from a first wellbore into a second wellbore, the first wellbore having a christmas tree, the christmas tree having a first flowpath which has an outlet and a second flowpath;
- the method comprising diverting fluid from a first portion of the first flowpath to the second flowpath, and diverting fluid from the second flowpath back to a second portion of the first flowpath;
- the method including the steps of processing the production fluids in a processing apparatus connected between the first and second flowpaths, and subsequently transferring a portion of the processed production fluids into the second wellbore.
Dependencies are inferred from the claim text.