| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166289000 | Discharging cement from casing at different levels | 12 |
| 20080223577 | FOAM DELIVERY SYSTEM - A foam delivery system comprises two delivery tubes providing a mixing chamber with a two-part polymeric foam. The mixing chamber mixes the two-part polymeric foam below a ground surface. A delivery manifold with delivery arms discharges the two-part polymer resin from the foam delivery system. A method of distributing a foam delivery systems comprises lowering a foam delivery system below a ground surface and discharging a polymer resin into the ground surface from a mixing chamber located below the ground surface. The mixing chamber discharges the polymer resin while the mixing chamber is lifted towards the ground surface, providing an expanding base of polymer resin. In that the chemicals are mixed at depth, that is, at the depth of the desired injection points, the possibility of premature setting and plugging of the delivery system is negated. An injector, comprising the mixing chamber and the delivery manifold, mixes the two-part chemical system at depth and then simultaneously distributes the mixed chemicals to up to six injection points at any desired depth. | 09-18-2008 |
| 20090090508 | Liner Drilling Method and Liner Hanger - An installation system for installing a liner in a well includes drilling while simultaneously running the liner. A string of drill pipe with a bottom hole assembly including a drill bit on a lower end is lowered into the liner while the liner is suspended at the rig floor. The bottom hole assembly engages a lower sub of the liner for torque transmission. A running tool secured to the drill pipe engages the upper sub such that the running tool supports the weight of the liner and transmits torque. The drill pipe and liner are rotated to drill deeper into the welbore. The liner hanger can be set to engage the casing, then released and reset at a different point. | 04-09-2009 |
| 20100051276 | Stage cementing tool - A stage cementing tool for use in cementing a casing in the well is disclosed. The stage cementing tool includes a housing with a mechanically set packer to seal against the well. A hydraulically actuated opening sleeve will move in the housing to uncover flow ports in the housing, and allow flow therethrough into the well. | 03-04-2010 |
| 20110220356 | MULTIPLE STAGE CEMENTING TOOL WITH EXPANDABLE SEALING ELEMENT - A cementing tool for cementing a casing in a well has an inner mandrel that defines a central flow passage and has at least one fluid port defined through a wall thereof. An outer mandrel is disposed about the inner mandrel and the inner and outer mandrels define an annular space therebetween. The outer mandrel has at least one sealing element affixed thereto. An opening sleeve is positioned in the inner mandrel and is movable from a closed position to an open position in which the fluid port is uncovered. An expansion cone is positioned in the annular space. Fluid pressure applied through the central flow passage, and the fluid port will pass into the annular space and will urge the expansion cone through the annular space which will plastically deform the outer mandrel so that sealing elements affixed to the outer mandrel engage a previously installed casing in the well to seal thereagainst. | 09-15-2011 |
| 20120138298 | METHODS 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 path and a second fluid flow path. Fluid is flowed through the first fluid flow path, and at least a portion of which may return through the second fluid flow path. In one embodiment, the drilling assembly is provided with a third fluid flow path. After drilling has been completed, wellbore lining conduit may be cemented in the wellbore. | 06-07-2012 |
| 20120247767 | STAGE TOOL FOR WELLBORE CEMENTING - A stage tool for wellbore annular cementing includes: a main body including a tubular wall with an outer surface and a longitudinal bore extending from a top end to a bottom end, the tubular wall including a first tubular and a second tubular telescopically secured relative to and axially slidable along the first tubular; a fluid port through the tubular wall and, when opened, providing fluidic access between the longitudinal bore and the outer surface, the fluid port being openable with the first tubular and the second tubular are a first overlapping position and being closed by axially sliding the first tubular and the second tubular into a further overlapping position relative to the first overlapping position; and a sliding sleeve valve positioned over the port and drivable by fluid pressure from a position sealing against fluid flow out of the tool from the fluid port and a position retracted from the fluid port to permit fluid flow out of the tool from the fluid port. The stage tool may be run in closed and opened for cementing by hydraulic actuation of the sliding sleeve valve. After sufficient cement has been introduced, the stage tool fluid port can be closed by compressing the first tubular and the second tubular to further overlap and overlie the fluid port. | 10-04-2012 |
| 20120261127 | SLIDING STAGE CEMENTING TOOL AND METHOD - A downhole tool provided within a casing string for use in cement staging operations. The tool includes a sleeve in the tool that selectively slides downward under pressure to expose ports formed in a side wall of the tool. Also, an annulus through the tool is selectively blocked so that cement in the casing string flows radially outward through the ports and into an annulus between the tool and a wellbore. An inflatable packer is included that is integral to the body of the tool and is inflated with a fluid that is pushed into the packer as the sleeve slides downward. An optional expanding agent can be included in the packer that is a metal oxide and is activated with the addition of water. | 10-18-2012 |
| 20130112410 | Subsurface Release Cementing Plug - A subsurface release plug release apparatus comprising a mandrel comprising a bottom plug portion, a top plug portion, a work string attachment portion, a first release portion between the bottom plug portion and the top plug portion, wherein the first release portion comprises a controlled strength segment configured to fail structurally and thereby release the bottom plug portion at a first fluid pressure, and a second release portion between the top plug portion and the work string attachment portion, wherein the second release portion is configured to release the bottom plug portion at a second fluid pressure, wherein the first fluid pressure is less than the second fluid pressure, a bottom plug body disposed about the bottom plug portion of the mandrel, and a top plug body disposed about the top plug portion of the mandrel. | 05-09-2013 |
| 20150021026 | Zone Select Stage Tool System - A stage tool operable with a plug is used for cementing a tubing string in a wellbore annulus. The tool can have a housing with a closure sleeve movably disposed in the internal bore of the housing. When pressure is applied downhole to the tool, a breachable obstruction on an exit port of the tool's bore opens and allows fluid such as cement slurry to communicate to the wellbore annulus. When cementing through the open tool finished, a plug deployed downhole lands on a seat in the closure sleeve, and applied fluid pressure in the tool's bore against the seated plug closes the closure sleeve relative to the housing's exit port. Rotational catches between the housing's bore and the closure sleeve prevent the closure sleeve from rotating. Preferably, an intermediate sleeve is used in the housing's bore and has rotational catches on each end. When the closure sleeve moves closed, the intermediate sleeve is also moved to engage between the catches on the end of the closure sleeve and the catches on a shoulder of the housing's bore. In further arrangements, a hydraulic mechanism on the tool can facilitate movement of the closure sleeve in response to a fluid pressure component. | 01-22-2015 |
| 20150027706 | Electronically-Actuated Cementing Port Collar - A cementing port collar has an opening sleeve biased from a closed position to an opened position relative to the collar's exit port, and a first restraint temporarily holds the opening sleeve closed. The collar also has a closing sleeve biased from an opened position to a closed position, and a second restraint temporarily holds the closing sleeve opened. During cementing, the first restraint is electronically activated with a first trigger to release the opening sleeve opened so cement slurry can pass out of the collar's exit port to the borehole annulus. When cementing is completed, the second restraint is electronically activated with a second trigger to release the closing sleeve closed to close off the collar to the borehole so the cement can set. The restraints can include bands of synthetic fiber, which are burned by fuses activated by a controller of the collar responding to passage of RFID tags. | 01-29-2015 |
| 20150330181 | SURGE IMMUNE STAGE SYSTEM FOR WELLBORE TUBULAR CEMENTATION - A method for cementing a tubular string into a wellbore includes: running the tubular string into the wellbore using a workstring having a deployment assembly; delivering an opener activator through the workstring to the deployment assembly, thereby launching an opener plug from the deployment assembly; pumping the opener activator and plug to a stage valve of the tubular string, thereby opening the stage valve; pumping cement slurry into the workstring; pumping a closer activator through the workstring behind the cement slurry, thereby launching a closer plug from the deployment assembly; and pumping the closer activator and plug to the open stage valve, thereby driving the cement slurry into an annulus between the tubular string and the wellbore and closing the stage valve. | 11-19-2015 |
| 20160102526 | STAGE TOOL - A method of closing a stage tool in a wellbore includes releasing a closing tube into the wellbore; attaching the closing tube to the stage tool; and expanding the closing tube, thereby closing a port of the stage tool. | 04-14-2016 |
