US Patent No: 7,866,399
Number of patents in Portfolio can not be more than 2000
Apparatus and method for managed pressure drilling
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Jan 11, 2011
Issued date -
Oct 20, 2006
filing date -
11/584,186
serial no -
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Abstract
A drilling system employing a main tubular having a plurality of fluid inlet and outlet conduits positioned thereon and a concentric inner tubular having a plurality seals for sealing the annular space between the concentric inner and main tubulars. The fluid inlet and outlet conduits work in cooperation with the annular seals to selectively open and close for effective management of pressure within the tubulars.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 6,315,061 Brine-based drilling fluids for ballast tank storage | 5 | 1999 | |
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| 6,499,540 Method for detecting a leak in a drill string valve | 3 | 2000 | |
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| 6,904,981 Dynamic annular pressure control apparatus and method | 32 | 2003 | |
| 7,395,878 Drilling system and method | 9 | 2006 | |
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| 2007/0151,762 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system | 6 | 2007 | |
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| 6,802,379 Liquid lift method for drilling risers | 23 | 2002 | |
| 2009/0090,558 Compressible Objects Having A Predetermined Internal Pressure Combined With A Drilling Fluid To Form A Variable Density Drilling Mud | 5 | 2008 | |
| 2009/0090,559 COMPRESSIBLE OBJECTS COMBINED WITH A DRILLING FLUID TO FORM A VARIABLE DENSITY DRILLING MUD | 5 | 2008 | |
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| 6,276,455 Subsea gas separation system and method for offshore drilling | 39 | 1998 | |
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| 5,314,022 Dilution of drilling fluid in forming cement slurries | 78 | 1992 | |
| 5,533,574 Dual concentric string high pressure riser | 18 | 1995 | |
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| 5,873,420 Air and mud control system for underbalanced drilling | 35 | 1997 | |
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| 4,216,834 Connecting assembly and method | 32 | 1978 | |
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| 4,626,135 Marine riser well control method and apparatus | 53 | 1984 | |
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| 5,720,356 Method and system for drilling underbalanced radial wells utilizing a dual string technique in a live well | 150 | 1996 | |
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| 6,579,832 Method for treating drilling fluid using nanoparticles | 10 | 2001 | |
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| 6,530,437 Multi-gradient drilling method and system | 39 | 2001 | |
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| 5,513,706 Method for improving formation stability surrounding a deviated wellbore | 1 | 1995 | |
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| 6,745,857 Method of drilling sub-sea oil and gas production wells | 19 | 2002 | |
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| 7,658,228 High pressure system | 23 | 2006 | |
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| 7,044,237 Drilling system and method | 44 | 2002 | |
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| 7,032,691 Underbalanced well drilling and production | 21 | 2003 | |
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| 5,586,609 Method and apparatus for drilling with high-pressure, reduced solid content liquid | 7 | 1994 | |
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| 6,273,193 Dynamically positioned, concentric riser, drilling method and apparatus | 27 | 1998 | |
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| 6,173,781 Slip joint intervention riser with pressure seals and method of using the same | 8 | 1998 | |
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| 6,308,787 Real-time control system and method for controlling an underground boring machine | 61 | 1999 | |
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| 2007/0284,113 System And Method For Rigging Up Well Workover Equipment | 9 | 2005 | |
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| 7,407,019 Method of dynamically controlling open hole pressure in a wellbore using wellhead pressure control | 4 | 2005 | |
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| 7,380,609 Method and apparatus of suspending, completing and working over a well | 4 | 2003 | |
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| 7,044,343 Gravity flow water filtration backpack | 5 | 2003 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jul 11, 2014 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 11, 2018 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 11, 2022 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| 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 |