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Method for removing condensables from natural gas stream, at wellhead, downstream of wellhead choke

A condensate, choke technology used in chemical instruments and methods, separation methods, wellbore/well components, etc.

Inactive Publication Date: 2002-02-06
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is nothing described or implied about their application as part of a wellhead assembly downstream of a wellhead choke

Method used

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  • Method for removing condensables from natural gas stream, at wellhead, downstream of wellhead choke
  • Method for removing condensables from natural gas stream, at wellhead, downstream of wellhead choke
  • Method for removing condensables from natural gas stream, at wellhead, downstream of wellhead choke

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Embodiment Construction

[0035] FIG. 1 shows an air duct in the form of an open-ended tubular housing 1 having a fluid inlet 3 at one end. Near the other end of the housing is provided a first outlet 5 for fluid containing condensables and at the other end of the housing a second outlet 7 is provided for fluid substantially free of condensables. The flow direction in the device 1 is from the inlet 3 to the first and second outlets 5 , 7 . The inlet 3 is a Laval-type acceleration section, and its longitudinal cross-sectional shape in the flow direction is contracted first and then expanded, so that the fluid flowing into the shell 1 through the inlet 3 can reach a supersonic flow velocity. A primary cylindrical part 9 and a diffuser pipe 11 are also arranged in the housing 1 , and the primary cylindrical part is located between the inlet 3 and the diffuser pipe 11 . On the inner surface of the primary cylindrical part 9, one or more (for example, four) radially inwardly protruding T-shaped guide vanes...

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Abstract

The present invention relates to a method for removing condensables from a natural gas stream, at a wellhead, downstream of the wellhead choke thereof. In accordance with the invention there is provided a method for removing condensables from a natural gas stream at a wellhead, the method comprising the steps of: (A) inducing the natural gas stream to flow at supersonic velocity through a conduit of a supersonic inertia separator and thereby causing the fluid to cool to a temperature that is below a temperature / pressure at which the condensables will begin to condense, forming separate droplets and / or particles; (B) separating the droplets and / or particles from the gas; and (C) collecting the gas from which the condensables have been removed, wherein the supersonic inertia separator is part of the wellhead assembly downstream of the wellhead choke. There is also provided a device for removing said condensables from said natural gas that is part of the wellhead assembly downstream of the choke, a wellhead assembly comprising said device.

Description

technical field [0001] The present invention relates to a method for removing condensables from a natural gas stream at a location downstream of a wellhead choke at a wellhead; and to a wellhead for removing said condensables from said natural gas stream, The wellhead assembly is part of a wellhead assembly located downstream of a choke; and relates to a wellhead assembly comprising said assembly. Background technique [0002] For background information on wellhead assemblies and chokes (also commonly referred to as well valves) used to control production well flow, it may be necessary to refer to the following US patents: US Patent No. Inventor Name US 3155401 Musolf Wellhead Assembly US 3297344 Hanes joints for production well components US 4194718 Baker and other restrictors US 4102401 Erbstoesser Production well working fluids diverted by low-density plugging balls US 4606557 Coffey Subsea wellhead joints US 4898235 Enright Used on plunger gas production wells with shut-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D45/16B01D51/08B01D53/00E21B43/38F25J3/06
CPCB01D53/002B01D45/16B01D51/08E21B43/385E21B43/35E21B34/025
Inventor 科内利斯·A·T·威林克
Owner SHELL INT RES MAATSCHAPPIJ BV
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