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Class Information
Number: 166/291
Name: Wells > Processes > Cementing, plugging or consolidating > With piston separator
Description: A process comprising forcing the cement down a tubing or casing in the well and separating the traveling body of cement from an adjacent fluid by a piston means at an end of the cement body.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7401646 |
Methods for reverse-circulation cementing in subterranean formations |
Jul. 22, 2008 |
| 7395858 |
Process for the selective controlled reduction of the relative water permeability in high permeability oil-bearing subterranean formations |
Jul. 8, 2008 |
| 7392844 |
Method of treating an oil or gas well with biodegradable low toxicity fluid system |
Jul. 1, 2008 |
| 7389815 |
Methods for reverse-circulation cementing in subterranean formations |
Jun. 24, 2008 |
| 7325610 |
Methods and apparatus for handling and drilling with tubulars or casing |
Feb. 5, 2008 |
| 7322413 |
Equalizer valve assembly |
Jan. 29, 2008 |
| 7303008 |
Methods and systems for reverse-circulation cementing in subterranean formations |
Dec. 4, 2007 |
| 7284608 |
Casing strings and methods of using such strings in subterranean cementing operations |
Oct. 23, 2007 |
| 7284609 |
Methods of using settable spotting compositions comprising cement kiln dust |
Oct. 23, 2007 |
| 7281582 |
Double swivel apparatus and method |
Oct. 16, 2007 |
| 7275595 |
Method and apparatus to isolate fluids during gravel pack operations |
Oct. 2, 2007 |
| 7270183 |
Cementing methods using compressible cement compositions |
Sep. 18, 2007 |
| 7249632 |
Top drive swivel apparatus and method |
Jul. 31, 2007 |
| 7234522 |
Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
Jun. 26, 2007 |
| 7231976 |
Method of treating an oil or gas well with biodegradable low toxicity fluid system |
Jun. 19, 2007 |
| 7207387 |
Methods and compositions for use with spacer fluids used in subterranean well bores |
Apr. 24, 2007 |
| 7188676 |
Method for displacing oil base drilling muds and/or residues from oil base drilling mud using water-in-oil emulsion |
Mar. 13, 2007 |
| 7182142 |
Downhole apparatus |
Feb. 27, 2007 |
| 7178590 |
Well fluids and methods of use in subterranean formations |
Feb. 20, 2007 |
| 7150321 |
Zeolite-containing settable spotting fluids |
Dec. 19, 2006 |
| 7143827 |
Well completion spacer fluids containing fibers and methods |
Dec. 5, 2006 |
| 7128149 |
Apparatus and methods for improved fluid displacement in subterranean formations |
Oct. 31, 2006 |
| 7128154 |
Single-direction cementing plug |
Oct. 31, 2006 |
| 7114568 |
Hydrophobically modified polymers for a well completion spacer fluid |
Oct. 3, 2006 |
| 7096949 |
Wiper plug with packer |
Aug. 29, 2006 |
| 7096944 |
Well fluids and methods of use in subterranean formations |
Aug. 29, 2006 |
| 7080687 |
Anti-rotation method and apparatus for limiting rotation of cementing plugs |
Jul. 25, 2006 |
| 7048053 |
Zeolite compositions having enhanced compressive strength |
May. 23, 2006 |
| 7032668 |
Cementing system and method for wellbores |
Apr. 25, 2006 |
| 7013971 |
Reverse circulation cementing process |
Mar. 21, 2006 |
| 7007754 |
Method of cementing an area of a borehole with aqueous cement spacer system |
Mar. 7, 2006 |
| 7007753 |
Top drive swivel apparatus and method |
Mar. 7, 2006 |
| 6997253 |
Anti-rotation method and apparatus for limiting rotation of cementing plugs |
Feb. 14, 2006 |
| 6983799 |
Method of using a swelling agent to prevent a cement slurry from being lost to a subterranean formation |
Jan. 10, 2006 |
| 6973969 |
Apparatus and methods for preventing or limiting rotation of cementing plugs |
Dec. 13, 2005 |
| 6904970 |
Cementing manifold assembly |
Jun. 14, 2005 |
| 6896051 |
Anti-rotation method and apparatus for limiting rotation of cementing plugs |
May. 24, 2005 |
| 6880636 |
Apparatus and method for disconnecting a tail pipe and maintaining fluid inside a workstring |
Apr. 19, 2005 |
| 6868908 |
Anti-rotation method and apparatus for limiting rotation of cementing plugs |
Mar. 22, 2005 |
| 6820691 |
Cementing tool and method |
Nov. 23, 2004 |
| 6796377 |
Anti-rotation apparatus for limiting rotation of cementing plugs |
Sep. 28, 2004 |
| 6789619 |
Apparatus and method for detecting the launch of a device in oilfield applications |
Sep. 14, 2004 |
| 6752209 |
Cementing system and method for wellbores |
Jun. 22, 2004 |
| 6739391 |
Surface deployed cement separation plug |
May. 25, 2004 |
| 6732797 |
Method of forming a cementitious plug in a well |
May. 11, 2004 |
| 6668927 |
Well completion foamed spacer fluids and methods |
Dec. 30, 2003 |
| 6651743 |
Slim hole stage cementer and method |
Nov. 25, 2003 |
| 6648075 |
Method and apparatus for expandable liner hanger with bypass |
Nov. 18, 2003 |
| 6622798 |
Method and apparatus for maintaining a fluid column in a wellbore annulus |
Sep. 23, 2003 |
| 6566310 |
Tandem spacer fluid system and method for positioning a cement slurry in a wellbore annulus |
May. 20, 2003 |
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