Patents by Inventor Nigel Leggett
Nigel Leggett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8074713Abstract: A system and method to log a wellbore, comprising a logging tool adapted to be deployed in a wellbore environment, the logging tool including at least one sensor for taking a measurement of the wellbore environment. The sensor is a fiber optic sensor and the system includes a fiber optic line in optical communication with the sensor. The data measured by the sensor is transmitted through the fiber optic line on a real time basis to the surface, where the data is processed into a real time display. In one embodiment, the fiber optic sensor is a passive sensor not requiring electrical or battery power. In another embodiment, a continuous tube with one end at the earth's surface and the other end in the wellbore is attached to the logging tool and includes the fiber optic line disposed therein.Type: GrantFiled: February 10, 2011Date of Patent: December 13, 2011Assignee: Schlumberger Technology CorporationInventors: Rogerio Ramos, Nigel Leggett
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Publication number: 20110139447Abstract: A system and method to log a wellbore, comprising a logging tool adapted to be deployed in a wellbore environment, the logging tool including at least one sensor for taking a measurement of the wellbore environment. The sensor is a fiber optic sensor and the system includes a fiber optic line in optical communication with the sensor. The data measured by the sensor is transmitted through the fiber optic line on a real time basis to the surface, where the data is processed into a real time display. In one embodiment, the fiber optic sensor is a passive sensor not requiring electrical or battery power. In another embodiment, a continuous tube with one end at the earth's surface and the other end in the wellbore is attached to the logging tool and includes the fiber optic line disposed therein.Type: ApplicationFiled: February 10, 2011Publication date: June 16, 2011Inventors: Rogerio Ramos, Nigel Leggett
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Patent number: 7900699Abstract: A system and method to log a wellbore, comprising a logging tool adapted to be deployed in a wellbore environment, the logging tool including at least one sensor for taking a measurement of the wellbore environment. The sensor is a fiber optic sensor and the system includes a fiber optic line in optical communication with the sensor. The data measured by the sensor is transmitted through the fiber optic line on a real time basis to the surface, Where the data is processed into a real time display. In one embodiment, the fiber optic sensor is a passive sensor not requiring electrical or battery power. In another embodiment, a continuous tube with one end at the earth's surface and the other end in the wellbore is attached to the logging tool and includes the fiber optic line disposed therein.Type: GrantFiled: August 29, 2003Date of Patent: March 8, 2011Assignee: Schlumberger Technology CorporationInventors: Rogerio Ramos, Nigel Leggett
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Patent number: 7787504Abstract: In an optical supply arrangement, a laser source (10) provides transmitted laser light down an optical supply line (12, 14). A first coupler (16), remote from the laser source (10) along the optical supply line (14), taps off a small proportion of the transmitted laser light to be returned along the optical supply line (14) to a photo detector (26) driving a monitor (28) and a controller (30). If the monitor (28) detects that the photo detector (26) is experiencing a loss of return laser light, possibly due to a break in the optical supply line (14), the monitor (28) causes the controller (30) to extinguish the laser source (10) in less time than escaping laser light can cause damage to property, person or eyesight. A first embodiment has the transmitted light on a transmission fiber optic (12) and the return laser light on a separate return fiber optic (24). A second embodiment has the return laser light being sent back down the transmission fiber optic (12).Type: GrantFiled: January 12, 2001Date of Patent: August 31, 2010Assignee: Schlumberger Technology CorporationInventors: Derek Nigel Leggett, James McInnes
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Publication number: 20060157239Abstract: A system and method to log a wellbore, comprising a logging tool adapted to be deployed in a wellbore environment, the logging tool including at least one sensor for taking a measurement of the wellbore euviwwnent. The sensor is a fiber optic sensor and the system includes a fiber optic line in optical communication with the sensor. The data measured by the sensor is transmitted through the fiber optic line on a real time basis to the surface. Where the data is processed into a real time display. In one embodiment, the fiber optic sensor is a passive sensor not requiring electrical or battery power. In another embodiment, a continuous tube with one end at the earth's surface and the other end in the wellbore is attached to the logging tool and includes the fiber optic line disposed therein.Type: ApplicationFiled: August 29, 2003Publication date: July 20, 2006Inventors: Rogerio Ramos, Nigel Leggett
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Patent number: 6977367Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: GrantFiled: July 2, 2004Date of Patent: December 20, 2005Assignee: Sensor Highway LimitedInventors: Paulo S. Tubel, Glynn Williams, Kurt A. Hickey, Nigel Leggett
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Patent number: 6943340Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforation device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: GrantFiled: July 2, 2004Date of Patent: September 13, 2005Assignee: Sensor Highway LimitedInventors: Paulo S. Tubel, Glynn Williams, Kurt A. Hickey, Nigel Leggett
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Publication number: 20050034857Abstract: Methods and apparatus comprise a conveyance structure to carry a tool into a wellbore. The conveyance structure contains an optical fiber line to enable communication between the tool and well surface equipment. In one implementation, the conveyance structure comprises a slickline. In another implementation, the conveyance structure includes another type of conveyance device that does not convey power and data separate from the fiber optic line.Type: ApplicationFiled: August 29, 2003Publication date: February 17, 2005Inventors: Harmel Defretin, Gordon Duncan, Nicolas Pacault, Christian Koeniger, Nigel Leggett
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Publication number: 20050012036Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: ApplicationFiled: July 2, 2004Publication date: January 20, 2005Inventors: Paulo Tubel, Glynn Williams, Kurt Hickey, Nigel Leggett
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Publication number: 20040256100Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforation, device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: ApplicationFiled: July 2, 2004Publication date: December 23, 2004Inventors: Paulo S. Tubel, Glynn Williams, Kurt A. Hickey, Nigel Leggett
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Patent number: 6828547Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: GrantFiled: January 3, 2003Date of Patent: December 7, 2004Assignee: Sensor Highway LimitedInventors: Paulo S. Tubel, Glynn Williams, Michael H. Johnson, John W. Harrell, Jeffrey J. Lembcke, Kurt A. Hickey, Nigel Leggett
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Patent number: 6787758Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: GrantFiled: April 12, 2002Date of Patent: September 7, 2004Assignee: Baker Hughes IncorporatedInventors: Paulo S. Tubel, Glynn Williams, Michael H. Johnson, John W. Harrell, Jeffrey J. Lembcke, Kurt A. Hickey, Nigel Leggett
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Patent number: 6750440Abstract: A selective optical actuation system for a plurality of electrical devices (20) comprises a variable pulse frequency pulsed light source (10) and an optical fibre network (12, 13, 14) distributing the light pulses to actuation gateway for each device, comprising a photovoltaic converter (16) whose correspondingly pulsed electrical output is applied to a ferroelectric transformer (18). Only if the pulse frequency is within the resonant band for a given transformer will the voltage be raised above a threshold value required to actuate that device. Choice of light pulse frequency thereby determines the device(s) to be actuated.Type: GrantFiled: July 22, 2002Date of Patent: June 15, 2004Inventors: Derek Nigel Leggett, James McInnes
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Publication number: 20030131990Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating, device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: ApplicationFiled: January 3, 2003Publication date: July 17, 2003Inventors: Paulo S. Tubel, Glynn Williams, Michael H. Johnson, John W. Harrell, Jeffrey J. Lembcke, Kurt A. Hickey, Nigel Leggett
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Publication number: 20030103536Abstract: In an optical supply arrangement, a laser source (10) provides transmitted laser light down an optical supply line (12, 14). A first coupler (16), remote from the laser source (10) along the optical supply line (14), taps off a small proportion of the transmitted laser light to be returned along the optical supply line (14) to a photo detector (26) driving a monitor (28) and a controller (30). If the monitor (28) detects that the photo detector (26) is experiencing a loss of return laser light, possibly due to a break in the optical supply line (14), the monitor (28) causes the controller (30) to extinguish the laser source (10) in less time than escaping laser light can cause damage to property, person or eyesight. A first embodiment has the transmitted light on a transmission fibre optic (12) and the return laser light on a separate return fibre optic (24). A second embodiment has the return laser light being sent back down the transmission fibre optic (12).Type: ApplicationFiled: November 15, 2002Publication date: June 5, 2003Inventors: Derek Nigel Leggett, James McInnes
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Patent number: 6531694Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: GrantFiled: February 6, 2001Date of Patent: March 11, 2003Assignee: Sensor Highway LimitedInventors: Paulo S. Tubel, Glynn Williams, Michael H. Johnson, John W. Harrell, Jeffrey J. Lembcke, Kurt A. Hickey, Nigel Leggett
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Publication number: 20020109080Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: ApplicationFiled: April 12, 2002Publication date: August 15, 2002Applicant: Baker Hughes IncorporatedInventors: Paulo S. Tubel, Glynn Williams, Michael H. Johnson, John W. Harrell, Jeffrey J. Lembcke, Kurt A. Hickey, Nigel Leggett
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Patent number: 6315049Abstract: A flush valve for a multiple line hydraulic system includes a bifurcated manifold, the bifurcation being provided by a piston actuatable hydraulically, mechanically, electrically magnetically or by fiber optic means. The piston or gate is provided with a port extending diametrically therethrough and oriented to become coaxial with an inlet and outlet of the manifold upon actuation of the piston. With the port aligned the hydraulic fluid in the system can be displaced by fresh fluid. The piston is then deactivated which results in the port becoming misaligned with the inlet and outlet of the manifold. In this condition the hydraulic system is again sealed and functions normally.Type: GrantFiled: September 23, 1999Date of Patent: November 13, 2001Assignee: Baker Hughes IncorporatedInventors: Kurt A. Hickey, Mark D. Hamilton, Nigel Leggett
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Publication number: 20010020675Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: ApplicationFiled: February 6, 2001Publication date: September 13, 2001Inventors: Paulo S. Tubel, Glynn Williams, Michael H. Johnson, John W. Harrell, Jeffrey J. Lembecke, Kurt A. Hickey, Nigel Leggett
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Patent number: 6281489Abstract: This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.Type: GrantFiled: May 1, 1998Date of Patent: August 28, 2001Assignee: Baker Hughes IncorporatedInventors: Paulo S. Tubel, Glynn Williams, Michael H. Johnson, John W. Harrell, Jeffrey J. Lembcke, Kurt A. Hickey, Nigel Leggett