US Patent No: 6,763,891

Number of patents in Portfolio can not be more than 2000

Production tree with multiple safety barriers

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ALSO PUBLISHED AS: 20030019632
ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

The wellhead assembly has a production tree with multiple safety barriers. A tubing hanger lands and seals in the bore of the tree. The tubing hanger has a lateral production flow passage that registers with a lateral passage in the tree. A tubing annulus passage extends upward from the tubing annulus to an exterior port. A second portion of the tubing annulus passage extends upward from the exterior port into the bore above the tubing hanger seal. The external port may be used for gas injection. If so, two closure members are located in the upper portion of the tubing annulus above the seal. The upper closure member may be either a check valve or a removable plug.

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First Claim

Related Publications

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Patent Owner(s)

Patent OwnerAddressTotal Patents
VETCO GRAY INC.HOUSTON, TX562

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brammer, Norman Aberdeen, GB 47 630
Goetz, Jeffrey P Inverurie, GB 1 21
Humphrey, Bernard Potterton, GB 1 21
Ingram, Kevin L Aberdeen, GB 1 21
Voss, Jr Robert K Houston, TX 3 51

Cited Art

Patent Info (Count) # Cites Year
 
VETCO GRAY INC. (4)
6,062,314 Tubing hanger and tree with horizontal flow and annulus ports 27 1997
5,988,282 Pressure compensated actuated check valve 29 1997
6,050,339 Annulus porting of horizontal tree 46 1997
6,186,237 Annulus check valve with tubing plug back-up 11 1998
 
COOPER CAMERON CORPORATION (2)
5,544,707 Wellhead 97 1994
6,039,119 Completion system 53 1996

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
VETCO GRAY INC. (10)
6,942,028 Slim-bore tubing hanger 7 2003
7,073,591 Casing hanger annulus monitoring system 10 2005
7,407,011 Tubing annulus plug valve 6 2005
7,607,485 Tubing hanger and wellhead housing with mating tubing annulus passages 2 2007
7,909,103 Retrievable tubing hanger installed below tree 4 2007
7,621,338 Non-orienting tree cap 3 2007
8,322,440 Integrated electrical connector for use in a wellhead tree 0 2009
8,061,428 Non-orientated tubing hanger with full bore tree head 1 2009
8,322,443 Wellhead tree pressure limiting device 0 2010
8,403,060 Wellhead tree pressure limiting device 0 2012
 
T-3 PROPERTY HOLDINGS, INC. (3)
7,845,415 Direct connecting downhole control system 3 2007
8,196,649 Thru diverter wellhead with direct connecting downhole control 0 2008
8,091,648 Direct connecting downhole control system 0 2010
 
CAMERON INTERNATIONAL CORPORATION (2)
RE43262 Retaining apparatus for use in a wellhead assembly and method for using the same 0 2005
8,316,946 Subsea completion with a wellhead annulus access adapter 0 2009
 
AKER SOLUTIONS (1)
8,230,928 Low profile internal tree cap 0 2009
 
AKER SUBSEA INC. (1)
8,087,465 Locking cap for subsea tree 0 2008
 
AKER SUBSEA LIMITED (1)
7,637,325 Subsea trees and caps for them 2 2006
 
ARGUS SUBSEA, INC. (1)
8,286,713 Oil and gas well completion system and method of installation 0 2009
 
BAKER HUGHES INCORPORATED (1)
7,699,110 Flow diverter tool assembly and methods of using same 4 2006
 
Other [Check patent profile for assignment information] (1)
7,051,804 Subsea protective cap 8 2003

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jan 20, 2016
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00