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| Number | Title | Issue Date |
| 8066069 | Method and apparatus for wellbore construction and completion The present invention relates methods and apparatus for lining a wellbore. In one aspect, a drilling assembly having an earth removal member and a wellbore lining conduit is manipulated to advance into the earth. The drilling assembly includes a first fluid flow pat... | 11/29/2011 |
| 7857052 | Stage cementing methods used in casing while drilling Apparatus and methods are provided for a cementing operation for use with a drilling with casing application. In one embodiment, an apparatus is provided for stage cementing using a full opening stage tool. In another embodiment, an apparatus is provided for reverse... | 12/28/2010 |
| 7472752 | Apparatus and method for forming multiple plugs in a wellbore An apparatus and method for forming plugs in a wellbore, according to which a first volume of slurry is introduced into a work string in a wellbore so that it flows through the work string and discharges before hardening to form a plug. A second volume of slurry is ... | 01/06/2009 |
| 7409990 | Downhole mixing of encapsulated plug components for abandoning a well A two part encapsulated cementing system is mixed downhole in a method of plugging an abandoned well. Using this two part system, one of the components is first placed in the well at the desired plugging depth. Next, the other component is placed in the well above t... | 08/12/2008 |
| 7363976 | Well remediation using downhole slurry A method of remediation of a well is provided utilizing a cement and cement activator plugging composition, in which one of the components is first placed in the well at the desired remediation depth. Next, the other component is placed in the well above the first p... | 04/29/2008 |
| 7347274 | Annular barrier tool The present invention provides for an annular barrier tool to block or restrict the flow of well fluids in the annular region of a well. ... | 03/25/2008 |
| 7347289 | Dart-operated big bore by-pass valve A by-pass tool is provided which has a large bore throughflow passage when in an inactive drilling mode, and which is capable of being activated upon launching of an activation dart from the surface, to an active mode in which drillstring fluids can be diverted to a... | 03/25/2008 |
| 7322412 | Casing shoes and methods of reverse-circulation cementing of casing A method having the following steps: running a circulation valve comprising a reactive material into the well bore on the casing; reverse-circulating an activator material in the well bore until the activator material contacts the reactive material of the circulatio... | 01/29/2008 |
| 7303014 | Casing strings and methods of using such strings in subterranean cementing operations Improved casing strings, and methods of using improved casing strings in subterranean cementing operations, are provided. An example of an apparatus is a pipe string comprising at least one pipe section and a delivery system of an activator. Another example of an ap... | 12/04/2007 |
| 7303008 | Methods and systems for reverse-circulation cementing in subterranean formations Methods and systems for reverse-circulation cementing in subterranean formations are provided. An example of a method is a method of cementing casing in a subterranean well bore, comprising inserting a casing into the well bore, the casing comprising a casing shoe; ... | 12/04/2007 |
| 7290612 | Apparatus and method for reverse circulation cementing a casing in an open-hole wellbore The present invention is directed to an apparatus and method for reverse circulation cementing a casing in an open-hole wellbore. The apparatus includes a surface pack-off device, which has a housing defined by an upper section and lower section. A load bearing plat... | 11/06/2007 |
| 7290611 | Methods and systems for cementing wells that lack surface casing Methods and systems for cementing casing in well bores drilled in subterranean formations, and more particularly, methods and systems for cementing casing in a well bore without surface casing or a well head are provided. A method provided herein may comprise sealin... | 11/06/2007 |
| 7287592 | Limited entry multiple fracture and frac-pack placement in liner completions using liner fracturing tool The present invention is directed to a method and apparatus for fracturing a subterranean formation which use a liner fracturing tool. The liner fracturing tool consists of a liner, with at least one jet extending through the liner. During fracturing operations, fra... | 10/30/2007 |
| 7284608 | Casing strings and methods of using such strings in subterranean cementing operations Improved casing strings, and methods of using improved casing strings in subterranean operations, are provided. An example of a method is a method of cementing a pipe string in a subterranean formation. Another example of a method is a method of cementing a pipe str... | 10/23/2007 |
| 7278483 | Methods of using cement compositions comprising phosphate compounds in subterranean formations Methods of using cement compositions comprising phosphate compounds in subterranean formations are provided. An example of a method is a method of cementing in a subterranean formation. Other examples of methods include methods of avoiding the loss of circulation in... | 10/09/2007 |
| 7270183 | Cementing methods using compressible cement compositions A method of cementing at least two casing strings in a well bore, the method having steps as follows: filling the well bore and the inner diameters of the at least two casing strings with a cement composition, wherein at least a portion of the cement composition is ... | 09/18/2007 |
| 7252147 | Cementing methods and systems for initiating fluid flow with reduced pumping pressure A method of initiating fluid circulation in a well bore through a casing inner diameter and an annulus outside the casing, the method having the following steps: inducing an increase in the annulus fluid pressure; flowing cement composition into the annulus at the t... | 08/07/2007 |
| 7237611 | Zero drill completion and production system The present invention is a method and apparatus for a one trip completion of fluid production wells. A completion tool string includes a pressure activated cementing valve, an external casing packer, a pressure activated production valve, an opening plug and a plug ... | 07/03/2007 |
| 7234522 | Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore A float system for use in cementing a casing in a wellbore. The wellbore is drilled with a drill bit attached to the casing. The drill bit is removed after the wellbore is drilled. The float system is lowered into the casing after the drill bit is removed. The float... | 06/26/2007 |
| 7204304 | Removable surface pack-off device for reverse cementing applications A removable surface pack-off device adapted for use in reverse cementing applications is provided. The device includes a housing adapted to be mounted between the ends of an inner casing and an outer casing at or near the surface of a well and at least one fluid pas... | 04/17/2007 |
| 7182142 | Downhole apparatus Apparatus (10) for facilitating coupling and cementing of downhole tubulars (12, 28) comprises a tubing section (12, 10) for use in lining a bore. The tubing section has upper and lower ends and defines a tubing wall having cement outlets (20... | 02/27/2007 |
| 7165634 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 01/23/2007 |
| 7147068 | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 12/12/2006 |
| 7100693 | Process for pressure stimulating a well bore through a template One or more templates are provided for circulating fluids in a main well bore and for drilling and completing at least one offset well bore from the main well bore. Each template has a body, an inlet leg, a main outlet leg, and an offset outlet leg. A straddle assem... | 09/05/2006 |
| 7096948 | Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing A multi-functional apparatus and method for drilling fluid and cementing operations to set casing in a wellbore for use on either top drive or rotary type rigs. The apparatus and method includes a fill-up and circulating tool, a cementing head assembly, and a wiper ... | 08/29/2006 |
| 7048050 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 05/23/2006 |
| 7048066 | Downhole sealing tools and method of use A downhole tool apparatus for insertion into and sealing engagement with a wellbore. The downhole tool includes upper and lower casing engaging members and an intervening sealing member. In one aspect the intervening sealing member may be a deformable material. In a... | 05/23/2006 |
| 7036610 | Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th... | 05/02/2006 |
| 7032668 | Cementing system and method for wellbores The present invention provides a cementing system and method for wellbores by cementing an annulus between a wellbore casing and a wellbore. In at least one embodiment, the invention includes a landing collar defining a restricted passage, a wellbore casing defining... | 04/25/2006 |
| 7013971 | Reverse circulation cementing process A method of cementing a casing in a wellbore with a tool having a plurality of holes therethrough connected at a lower end of the casing. The total cross-sectional area of the holes is preferably greater than the cross-sectional area of the inside of the casing. A p... | 03/21/2006 |
| 6966386 | Downhole sealing tools and method of use A downhole tool apparatus for insertion into and sealing engagement with a wellbore. The apparatus comprises a tube having an expandable diameter, and a gripping member joined to the tube adapted to engage a portion of the wellbore to limit movement of the tube with... | 11/22/2005 |
| 6942039 | Flapper valve and associated method for single trip retrieval of packer tools A method of providing for a single trip removal of packer tools by providing a flapper valve in the upper packer tools which opens when pressure below the tool exceeds the pressure above the tool to allow the tools to be released and allowing flow up the center of t... | 09/13/2005 |
| 6929076 | Bore hole underreamer having extendible cutting arms A bore hole underreamer is provided having a hollow body with a longitudinal axis, which has an external wall, at least two cylindrical bores provided through the external wall and whose axes are transverse to the longitudinal axis. Each of the bores have a cylindri... | 08/16/2005 |
| 6915856 | Apparatus and methods for preventing axial movement of downhole tool assemblies A slip assembly apparatus is adapted (i) to be deployed into a wellbore (ii) to prevent axial movement of a downhole tool assembly in the wellbore when the slip assembly apparatus is actuated and external forces are imposed on the downhole tool assembly; (iii) to al... | 07/12/2005 |
| 6834720 | Method and apparatus for injecting particulate media into the ground An improved method and apparatus for injecting particulate media into the ground for constructing underground permeable reactive barriers, which are used for environmental remediation of subsurface contaminated soil and water. A media injector sub-assembly attached ... | 12/28/2004 |
| 6793017 | Method and apparatus for transferring material in a wellbore In a method and apparatus for transferring material in a wellbore in an earth formation, a pipe is inserted into the wellbore. A conduit is inserted alongside the pipe into the wellbore. The conduit is fixed to the pipe and has a first section with a perforated wall... | 09/21/2004 |
| 6789621 | Intelligent well system and method An intelligent well system and method has a sand face completion and a monitoring system to monitor application of a well operation. Various equipment and services may be used. In another aspect, the invention provides a monitoring system for determining placement o... | 09/14/2004 |
| 6615920 | Template and system of templates for drilling and completing offset well bores One or more templates are provided for circulating fluids in a main well bore and for drilling and completing at least one offset well bore from the main well bore. Each template has a body, an inlet leg, a main outlet leg, and an offset outlet leg. A str... | 09/09/2003 |
| 6464008 | Well completion method and apparatus An apparatus and method for the completion of wells through a production tube includes a tool body having cement flow ports and pressure displaced port closure elements. A perforated mandrel tube concentrically aligned within the production tube is secure... | 10/15/2002 |
| 6311774 | Method and apparatus for securing a well casing to a wellbore A well casing for receiving well fluid from a producing formation includes a first tubular section that has a tortuous outer surface for directing the flow of a bonding agent around the exterior of the first tubular section. The first tubular section has ... | 11/06/2001 |
