| Patent application number | Description | Published |
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| 20100065276 | METHOD AND APPARATUS FOR WELLBORE FLUID TREATMENT - A tubing string assembly is disclosed for fluid treatment of a wellbore. The tubing string can be used for staged wellbore fluid treatment where a selected segment of the wellbore is treated, while other segments are sealed off. The tubing string can also be used where a ported tubing string is required to be run in in a pressure tight condition and later is needed to be in an open-port condition. | 03-18-2010 |
| 20100307751 | CEMENT DIFFUSER FOR ANNULUS CEMENTING - A cement diffuser and method for allowing a ported tubular to be cemented in place, while keeping an annulus about a port of the ported tubular generally free of set cement. The cement diffuser includes a collection of fibers secured over the port and extending out from an outer surface of the tubular. | 12-09-2010 |
| 20110067890 | WELLBORE FLUID TREATMENT PROCESS AND INSTALLATION - A method for isolating a perforated interval of a well, the well including a casing liner having a wall with a plurality of perforations therethrough forming the perforated interval, the method comprising: providing a tool including a tubular body including an inner diameter and an outer surface, a first open end and a second open end, the first and second open ends providing access to the inner diameter; and a sealing element to isolate a mid region of the outer surface from the first open end and the second open end; positioning the tool in the well with the tubular first open end adjacent and above an uppermost perforation of the perforated interval and the second open end adjacent and below a lowermost perforation of the perforated interval; and installing the tool in the well with the sealing element sealing between the tubular body and the casing wall above the uppermost perforation of the perforated interval and below the lowermost perforation of the perforated interval to isolate fluid flow between the perforations and the inner diameter. | 03-24-2011 |
| 20110079390 | CEMENTING SUB FOR ANNULUS CEMENTING - A cementing sub for wellbore annulus cementing that allows certain regions of the wellbore annulus to be cemented while other regions are left open for perforating, activation or controllable ported access. The cementing sub may include a tubular body including a first end, an opposite end and a wall defined between an inner bore extending from the first end to the opposite end and an outer surface; a port through the wall of the tubular body providing communication between the inner bore and the outer surface, the port including an openable closure; a conduit along the wall of the tubular extending from an inlet adjacent the first end and an outlet adjacent the opposite end, the inlet and outlet opening to the outer surface and being isolated from communication with the inner bore; a first annular packer encircling the tubular body and positioned between the port and the inlet; and a second annular packer encircling the tubular body and positioned between the port and the outlet. | 04-07-2011 |
| 20110100643 | DOWNHOLE SUB WITH HYDRAULICALLY ACTUABLE SLEEVE VALVE - A method for opening a port through the wall of a ported sub including: providing a sub with a port through its tubular side wall; providing a hydraulically actuable valve to cover the port, the valve being actuable to move away from a position covering the port to thereby open the port; increasing pressure within the sub to create a pressure differential across the valve to move the valve toward the low pressure side, while the port remains closed by the valve; thereafter, reducing pressure within the sub to reduce the pressure differential; and driving the valve to move it away from a position covering the port. | 05-05-2011 |
| 20110127047 | METHOD AND APPARATUS FOR WELLBORE FLUID TREATMENT - An apparatus for fluid treatment of a borehole, the apparatus comprising: a tubing string having a long axis and an upper end, a first port opened through the wall of the tubing string, a second port opened through the wall of the tubing string, the second port axially offset from the first port and positioned between the first port and the upper end, a third port opened through the wall of the tubing string, the third port axially offset from the second port and positioned between the second port and the upper end, a first packer operable to seal about the tubing string and mounted on the tubing string to act in a position offset from the first port along the long axis of the tubing string, a second packer operable to seal about the tubing string and mounted on the tubing string to act in a position between the first port and the second port along the long axis of the tubing string; a third packer operable to seal about the tubing string and mounted on the tubing string to act in a position between the second port and the third port along the long axis of the tubing string; a first closure positioned relative to the first port, the first closure being actuable relative to the first port between a closed port position and a position permitting fluid flow through the first port from the tubing string inner bore; a second closure being actuable relative to the second port between a closed port position and a position permitting fluid flow through the second port from the tubing string inner bore; and a third closure being actuable relative to the third port between a closed port position and a position permitting fluid flow through the third port from the tubing string inner bore; a closure actuating mechanism for actuating the first closure and the second closure together from their closed port positions to their positions permitting fluid flow, while the third closure remains in the closed port position. | 06-02-2011 |
| 20110278010 | METHOD AND APPARATUS FOR WELLBORE FLUID TREATMENT - A tubing string assembly is disclosed for fluid treatment of a wellbore. The tubing string can be used for staged wellbore fluid treatment where a selected segment of the wellbore is treated, while other segments are sealed off. The tubing string can also be used where a ported tubing string is required to be run in a pressure tight condition and later is needed to be in an open-port condition. | 11-17-2011 |
| 20110278017 | SLIDING SLEEVE SUB AND METHOD AND APPARATUS FOR WELLBORE FLUID TREATMENT - A tubing string assembly is disclosed for fluid treatment of a wellbore The tubing string can be used for staged wellbore fluid treatment where a selected segment of the wellbore is treated, while other segments are sealed off The tubing string can also be used where a ported tubing string is required to be run-m in a pressure tight condition and later is needed to be in an open-port condition A sliding sleeve in a tubular has a driver selected to be acted upon by an inner bore conveyed actuating device, the driver drives the generation of a ball stop on the sleeve. | 11-17-2011 |
