Apparatus for passive removal of subsurface contaminants

Pemberton, Bradley E; May, Christopher P; Rossabi, Joseph

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Title: Apparatus for passive removal of subsurface contaminants

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Abstract

An apparatus is provided which passively removes contaminated gases from a subsurface. The apparatus includes a riser pipe extending into a subsurface which has an exterior end in fluid communication with a valve. When well pressure is greater than atmospheric pressure, the valve opens to release contaminants into the atmosphere, and when well pressure is less than atmospheric pressure, the valve closes to prevent flow of air into the well. The valve assembly of the invention comprises a lightweight ball which is lifted from its valve seat with a slight pressure drop between the well and the atmosphere.

Inventors:

Pemberton, Bradley E ^[1]; May, Christopher P ^[2]; Rossabi, Joseph ^[1]

Aiken, SC
Fairfax, VA

Issue Date:: 1997-01-01

Research Org.:: Savannah River Site (SRS), Aiken, SC (United States)

OSTI Identifier:: 871011

Patent Number(s):: 5641245

Assignee:: Westinghouse Savannah River Company, Inc. (Aiken, SC)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B09 - DISPOSAL OF SOLID WASTE B09C - RECLAMATION OF CONTAMINATED SOIL

E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING

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B - PERFORMING OPERATIONS B09 - DISPOSAL OF SOLID WASTE B09C - RECLAMATION OF CONTAMINATED SOIL
B09C1/005 - {Extraction of vapours or gases using vacuum or venting}
B09C1/10 - microbiologically, {biologically} or by using enzymes
B09C2101/00 - In situ

E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
E21B34/02 - in well heads
E21B34/16 - Above-ground control means therefor {
E21B43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
E21B43/34 - Arrangements for separating materials produced by the well

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DOE Contract Number:: AC09-89SR18035

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: apparatus; passive; removal; subsurface; contaminants; provided; passively; removes; contaminated; gases; riser; pipe; extending; exterior; fluid; communication; valve; pressure; atmospheric; release; atmosphere; closes; prevent; flow; air; assembly; comprises; lightweight; ball; lifted; seat; slight; drop; valve seat; pressure drop; fluid communication; atmospheric pressure; valve assembly; contaminated gas; subsurface contaminants; contaminated gases; riser pipe; subsurface contaminant; surface contaminants; /405/166/588/

Citation Formats


                    Pemberton, Bradley E, May, Christopher P, and Rossabi, Joseph. Apparatus for passive removal of subsurface contaminants.  United States: N. p., 1997. 
        Web.

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                    Pemberton, Bradley E, May, Christopher P, & Rossabi, Joseph. Apparatus for passive removal of subsurface contaminants.  United States.

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                    Pemberton, Bradley E, May, Christopher P, and Rossabi, Joseph. Wed .  
        "Apparatus for passive removal of subsurface contaminants".  United States.  https://www.osti.gov/servlets/purl/871011.

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@article{osti_871011,

  title        = {Apparatus for passive removal of subsurface contaminants},

  author       = {Pemberton, Bradley E and May, Christopher P and Rossabi, Joseph},

  abstractNote = {An apparatus is provided which passively removes contaminated gases from a subsurface. The apparatus includes a riser pipe extending into a subsurface which has an exterior end in fluid communication with a valve. When well pressure is greater than atmospheric pressure, the valve opens to release contaminants into the atmosphere, and when well pressure is less than atmospheric pressure, the valve closes to prevent flow of air into the well. The valve assembly of the invention comprises a lightweight ball which is lifted from its valve seat with a slight pressure drop between the well and the atmosphere.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1997},

  month        = {1}

}

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An apparatus is provided which passively removes contaminated gases from a subsurface. The apparatus includes a riser pipe extending into a subsurface which has an exterior end in fluid communication with a valve. When well pressure is greater than atmospheric pressure, the valve opens to release contaminants into the atmosphere, and when well pressure is less than atmospheric pressure, the valve closes to prevent flow of air into the well. The valve assembly of the invention comprises a lightweight ball which is lifted from its valve seat with a slight pressure drop between the well and the atmosphere. 7 figs.

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