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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8151887 | Lubricator valve A lubricator valve assembly adapted for connection in a pipe string for use in a well includes a tubular valve body having a bore formed longitudinally therethrough; a valve seat connected to the valve body and in communication with the bore; a valve element mounted... | 04/10/2012 |
| 8141642 | Fill up and circulation tool and mudsaver valve A fill-up and circulation tool includes a mandrel; a packer assembly is disposed around the mandrel; and a valve assembly connected to the mandrel, wherein the valve assembly is configured to selectively control fluid flow into the tool and out of the tool. ... | 03/27/2012 |
| 8096363 | Circulation control valve and associated method A circulation control valve can include first and second valve devices and at least one opening which provides fluid communication between an interior longitudinal flow passage and an exterior of the valve. Fluid communication can be provided through each of the fir... | 01/17/2012 |
| 8096362 | Phase-controlled well flow control and associated methods Phase-controlled well flow control. A well system includes a flow control device which regulates flow of a fluid in the well system, the flow control device being responsive to both pressure and temperature in the well system to regulate flow of the fluid. A flow co... | 01/17/2012 |
| 8087463 | Multi-position hydraulic actuator A method of actuating a well tool utilizing first and second pressure sources includes the steps of: placing an actuator chamber in communication with the first pressure source, thereby displacing a piston from a first position to a second position; and then placing... | 01/03/2012 |
| 7926569 | Bypass device for wellbores A bypass device for bypassing a hydraulic piston in a wellbore with an outer tubular body. The outer tubular body can have a fluid control manifold. The fluid control manifold can have two control paths, two high pressure fluid paths, and two valves connecting with ... | 04/19/2011 |
| 7900705 | Flow control assembly having a fixed flow control device and an adjustable flow control device An apparatus for use in a well includes a flow control assembly to control fluid flow in a first zone of the well, where the flow control assembly has a fixed flow control device and an adjustable flow control device that cooperate to control the fluid flow in the f... | 03/08/2011 |
| 7861788 | Casing valves system for selective well stimulation and control Casing valves for selective well stimulation and control. A well system includes at least one valve interconnected in a casing string operable via at least one line external to the casing string to selectively control fluid flow between an exterior and interior of t... | 01/04/2011 |
| 7841412 | Multi-purpose pressure operated downhole valve A downhole valve features a flow port that can be selectively obstructed by a pressure actuated sleeve that is movable in a pin and slot mechanism to rotate while being cycled up and down by application and removal of pressure in a cyclical manner. When the sleeve i... | 11/30/2010 |
| 7748461 | Method and apparatus for multi-drop tool control A hydraulic actuator is connected between a downhole tool and a hydraulic control line for operating the downhole tool through an actuation sequence. The hydraulic actuator comprises a valve shuttle section having an inlet port in connection with the hydraulic contr... | 07/06/2010 |
| 7735560 | Distortion compensation for rod piston bore in subsurface safety valves Piston bore distortions in a sub-surface safety valve are reduced or eliminated when valve body is subjected to high working pressures. In one embodiment, a piston is disposed in a sleeve that is disposed in a piston bore. The bore can distort but the sleeve within ... | 06/15/2010 |
| 7699108 | Distortion compensation for rod piston bore in subsurface safety valves Piston bore distortions in a sub-surface safety valve are reduced or eliminated when valve body is subjected to high working pressures. In one embodiment, a piston is disposed in a sleeve that is disposed in a piston bore. The bore can distort but the sleeve within ... | 04/20/2010 |
| 7690432 | Apparatus and methods for utilizing a downhole deployment valve Methods and apparatus for utilizing a downhole deployment valve (DDV) to isolate a pressure in a portion of a bore are disclosed. The DDV system can include fail safe features such as selectively extendable attenuation members for decreasing a falling object's impac... | 04/06/2010 |
| 7562713 | Downhole actuation tools Implementations of various technologies are directed to a downhole actuation tool. In one implementation, the downhole actuation tool includes a tubular housing, an oil piston disposed inside the tubular housing, and a first housing disposed inside the tubular housi... | 07/21/2009 |
| 7562712 | Setting tool for hydraulically actuated devices A tool is actuated in a well based on one or more issued commands being interpreted and implemented by the apparatus. The apparatus comprises a power generation module that multiplies pressure delivered downhole to enable actuation of the tool without requiring deli... | 07/21/2009 |
| 7552774 | Control line hydrostatic minimally sensitive control system A control system for a downhole tool, such as a subsurface safety valve, features an operating piston that is insensitive to tubing pressure in the valve. The hydrostatic forces from the single control line from the surface are significantly reduced with a branch li... | 06/30/2009 |
| 7552773 | Multicycle hydraulic control valve A multicycle hydraulic control valve. A control and actuation system for a well tool includes a control valve having one or more metal-to-metal seals which open while differential pressure exists across the seals to thereby selectively connect pressure sources to an... | 06/30/2009 |
| 7438130 | Downhole actuating apparatus and method A method and apparatus for actuating a downhole tool is provided. The apparatus of the present invention includes a remotely energized actuator device that facilitates storage of energy needed to actuate a downhole tool after the device is placed downhole. By energi... | 10/21/2008 |
| 7424917 | Subsea pressure compensation system Systems and method for operating subsea devices and pressure compensated reservoir systems useful therewith which in certain aspects, include a chamber with a piston therein acted on an exposed side by water, e.g. sea water, to provide operational hydraulic fluid fo... | 09/16/2008 |
| 7422065 | System for controlling zones of fluid in and out of a wellbore A system for controlling zones of fluid flow in and out of a wellbore. The wellbore has a top of a well and a bottom of a well. The system has a control line connected to a power source, and a control system; wherein the control line is disposed within the wellbore.... | 09/09/2008 |
| 7389821 | Downhole trigger device having extrudable time delay material A trigger device for setting a downhole tool includes a retaining member that restricts the downhole tool from setting until it is properly positioned within the well and a force acts upon an actuating member. The retaining member includes an extrudable material tha... | 06/24/2008 |
| 7363980 | Downhole flow control apparatus, operable via surface applied pressure Flow control apparatus, for placement in a downhole location in the tubing string of a well. The apparatus comprises a valve element and a lock element. Application and removal of annulus pressure (on the annulus between the tubing and the casing) permits the appara... | 04/29/2008 |
| 7363985 | Hydraulic latch for capillary tubing string An hydraulic latch for selectively securing and, when necessary, automatically releasing capillary tubing suspended in a well bore in a manner affording clearance of a subsurface safety valve through which the suspended capillary tubing is suspended prior to release... | 04/29/2008 |
| 7360600 | Subsurface safety valves and methods of use A subsurface safety valve comprises a tubular body adapted for placement within a wellbore and defining a fluid passageway. A valve closure member, such as a flapper valve, is carried by the tubular body and movable through a closure path between positions opening a... | 04/22/2008 |
| 7357198 | Downhole apparatus The invention relates to apparatus for use in wellbores and particularly, but not exclusively, to circulating subs used during downhole drilling operations. The apparatus includes a control groove and a pin received within the control groove for determining whether ... | 04/15/2008 |
| 7357189 | Seal There is disclosed an expandable seal for sealing at least part of a wall of a well borehole, an expandable seal assembly comprising at least two such expandable seals, and a method of sealing at least part of a well borehole using such a seal. In one embodiment, th... | 04/15/2008 |
| 7341108 | Well downhole liquid dispenser A well downhole liquid dispenser is disclosed in which an inlet/discharge port assembly is provided having an inlet port in fluid communication with the shoulders of a conical piston. The point of the conical piston is in physical contact with the discharge channel ... | 03/11/2008 |
| 7337850 | System and method for controlling actuation of tools in a wellbore A technique is provided to control operation of well tools deployed in a wellbore. The technique utilizes a completion with at least one well tool actuated by fluid input. An electronic trigger system is associated with each well tool and is designed to respond to a... | 03/04/2008 |
| 7331392 | Pressure range delimited valve A differential pressure valve has a valve body containing a main piston axially moveable therein to open a fluid inlet to a fluid outlet at preset high pressure and to close at a preset lower pressure. A high pressure trigger piston and a low pressure trigger piston... | 02/19/2008 |
| 7331396 | Subsea production systems A subsea production system is disclosed. The subsea production system may comprise a well head, a tubing spool, a tubing hanger, an annulus, a production tree, and a bypass flow path. ... | 02/19/2008 |
| 7322378 | Semiconductor apparatuses and pipe supports thereof A semiconductor apparatus with a modified pipe support. The apparatus comprises an outer pipe, an inner pipe, and a pipe support. The support comprises a seat and a support ring. The seat comprises a tubular portion for supporting an outer pipe at a top end. The sup... | 01/29/2008 |
| 7322417 | Technique and apparatus for completing multiple zones An apparatus that is usable with a well includes a string and a plurality of tools that are mounted in the string. The string includes a passageway. The tools are mounted in the string and are adapted to be placed in a state to catch objects (free-falling objects an... | 01/29/2008 |
| 7311153 | Flow-biased sequencing valve A technique that is usable with a well includes providing a sequencing valve to in a first state to communicate a first flow through a first port of the valve and in a second state close fluid communication through the first port. The technique includes communicatin... | 12/25/2007 |
| 7306043 | System and method to control multiple tools through one control line The invention is a system and method a system used to control multiple downhole tools with one control line. The downhole tools may comprise any hydraulically actuated tools, such as valves, packers, or perforating guns. Each tool is associated with an indexer, in o... | 12/11/2007 |
| 7303020 | Interventionless oil tool actuator with floating piston and method of use An interventionless actuator for oil well tools is described wherein the actuator comprises at least one floating piston adapted to equalize a pressure differential and lock onto an actuating member. An interventionless actuator is described that is charged to an in... | 12/04/2007 |
| 7299866 | Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well An apparatus and method is used in the cleaning out of sand in underbalanced gas wells. The present invention includes a valve subassembly equipped with an emergency shutin device to remotely control the actuation of the valve via an air or hydraulic control line. O... | 11/27/2007 |
| 7296624 | Pressure control apparatus and method Pressure control in an isolated lower wellbore annulus, defined by a conduit sealably positioned within an isolated lower wellbore segment, is achieved while gravel packing by sensing the pressure within the isolated lower annulus while gravel packing and admitting ... | 11/20/2007 |
| 7281584 | Multi-cycle downhill apparatus A downhole apparatus such as multi-cycle circulating subs used during downhole drilling operations includes a piston (42) slidably mounted in a body (4) between positions in which at least one aperture (40) in the body is opened and closed. Move... | 10/16/2007 |
| 7264059 | Method and device for pressure controlled sequential operation A method and a device for controlling a downhole hydraulic sequential control system (1) in which a number of pressure relief valves (20, 22) are arranged to open sequentially directly or indirectly for corresponding actuators (26, 34) through i... | 09/04/2007 |
| 7252153 | Bi-directional fluid loss device and method A fluid loss device including a flapper and seat assembly that provide a seal on a lower flapper surface when the flapper is closed and resists pressure in either direction. The flapper and seat assembly is spring biased to contact a flapper support above the flappe... | 08/07/2007 |
