Patents by Inventor Lance S. Davis
Lance S. Davis 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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Publication number: 20190338597Abstract: A rotary drive apparatus (24) for a downhole tool (22), the rotary drive apparatus (24) comprising a drive stage (36a) comprising a rotor (40a) and a stator (42a) and a connecting stage (38a) for connecting to the drive stage (36a). The connecting stage (38a) comprises a rotor connector (44a) suitable for connecting to the rotor (40a) and a stator connector (46a) suitable for connecting to the stator (42a).Type: ApplicationFiled: May 17, 2019Publication date: November 7, 2019Inventor: Lance S. Davis
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Publication number: 20170145783Abstract: A downhole tool (10) configured to condition a borehole (B) and deliver a settable material, such as cement slurry, into a borehole annulus (A) for securing and supporting a casing string (C) in the borehole (B) comprises a body in the form of tubular housing (12), a shaft (14) rotatably mounted within the housing (12), a head portion (22) and a drive arrangement (20). In use, borehole cleaning and cementing operations may be carried out by directing a drive fluid, such as drilling mud, through the drive arrangement (20) to drive rotation of the head portion (22) to clean or condition the borehole (b). A cement slurry or the like, may then be directed through the casing string (C) or via a cementing string (S) into the shaft (14), and through the drive arrangement (20), the fluid then being ejected from the head portion (22).Type: ApplicationFiled: December 12, 2016Publication date: May 25, 2017Inventors: Lance S. Davis, Magnus J. Wardle, Edward D. Scott
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Patent number: 9574406Abstract: A completion system comprises tubular components coupled together to form a completion string. In-flow control devices are provided to permit selective fluid communication between an internal bore of the completion string and the annulus. A reaming tool is provided at a leading end of the completion string and the reaming tool is run into the borehole with the completion string. The reaming tool comprises a fluid-powered drive unit, a reaming body and a reaming nose. In use, the completion string is located in the borehole and fluid is directed to the reaming tool to facilitate reaming of the borehole. A second tubular in the form of a washpipe may extend through an internal bore of the completion string for providing fluid to the reaming tool. The reaming tool is operable at a fluid pressure below a pressure which would activate the in-flow control devices.Type: GrantFiled: April 18, 2012Date of Patent: February 21, 2017Assignee: Deep Casing Tools, Ltd.Inventors: Lance S. Davis, Edward D. Scott, Mark W. Presslie
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Patent number: 8807245Abstract: A reaming tool for use in reaming a bore includes a body adapted for location in a bore. The body defines a rotor of a rotary drive arrangement. A shaft adapted for location is disposed in the body. The shaft defines a stator of the rotary drive arrangement. A seal element is disposed between the shaft and the body. The seal element defines a bearing surface for permitting sealed relative rotation of the rotary drive arrangement. The tool includes a reaming member, wherein relative rotation between the body and the shaft facilitates reaming of the bore by the reaming member.Type: GrantFiled: December 24, 2010Date of Patent: August 19, 2014Assignee: Deep Casing Tools, Ltd.Inventors: Edward D. Scott, Lance S. Davis
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Patent number: 8622126Abstract: A reaming shoe for location in a bore has a rotationally balanced nose. A rotary drive is rotationally coupled to the reaming shoe to enable reaming of the bore. The assembly of the reaming shoe and the rotary drive is adapted to be coupled to a tubular component. The reaming shoe is mounted to the tubular component to enable rotation of the reaming shoe independently of the tubular component, such that the reaming shoe is rotatable at a different rotational speed than the tubular component.Type: GrantFiled: December 24, 2010Date of Patent: January 7, 2014Assignee: Deep Casing Tools, Ltd.Inventors: Edward D. Scott, Lance S. Davis
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Publication number: 20120199398Abstract: A completion system comprises tubular components coupled together to form a completion string. In-flow control devices are provided to permit selective fluid communication between an internal bore of the completion string and the annulus. A reaming tool is provided at a leading end of the completion string and the reaming tool is run into the borehole with the completion string. The reaming tool comprises a fluid-powered drive unit, a reaming body and a reaming nose. In use, the completion string is located in the borehole and fluid is directed to the reaming tool to facilitate reaming of the borehole. A second tubular in the form of a washpipe may extend through an internal bore of the completion string for providing fluid to the reaming tool. The reaming tool is operable at a fluid pressure below a pressure which would activate the in-flow control devices.Type: ApplicationFiled: April 18, 2012Publication date: August 9, 2012Inventors: Lance S. Davis, Edward D. Scott, Mark W. Presslie
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Patent number: 8074742Abstract: An apparatus for cutting a wellbore includes a motor with a stator and a rotor. The rotor includes an output shaft connected to a cutting structure to drive the cutting structure in use. The stator and rotor are spaced radially outwardly of the axis of the rotor such that at least one of the stator and the rotor has an access bore that extends through the motor to a position adjacent the cutting structure and through which a further object can pass without obstruction from the stator and rotor. The further object includes a further cutting structure. The motor workings are radially outward of the output shaft and the further cutting structure so as not to obstruct passage of the further cutting structure toward the cutting structure, such that the motor workings do not require drilling or removal to allow the further cutting structure access to the cutting structure.Type: GrantFiled: March 25, 2011Date of Patent: December 13, 2011Assignee: Deep Casing Tools, Ltd.Inventors: Edward D. Scott, Lance S. Davis
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Publication number: 20110180326Abstract: An apparatus for cutting a wellbore includes a motor with a stator and a rotor. The rotor includes an output shaft connected to a cutting structure to drive the cutting structure in use. The stator and rotor are spaced radially outwardly of the axis of the rotor such that at least one of the stator and the rotor has an access bore that extends through the motor to a position adjacent the cutting structure and through which a further object can pass without obstruction from the stator and rotor. The further object includes a further cutting structure. The motor workings are radially outward of the output shaft and the further cutting structure so as not to obstruct passage of the further cutting structure toward the cutting structure, such that the motor workings do not require drilling or removal to allow the further cutting structure access to the cutting structure.Type: ApplicationFiled: March 25, 2011Publication date: July 28, 2011Inventors: Edward D. Scott, Lance S. Davis
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Publication number: 20110168447Abstract: A reaming tool for use in reaming a bore includes a body adapted for location in a bore. The body defines a rotor of a rotary drive arrangement. A shaft adapted for location is disposed in the body. The shaft defines a stator of the rotary drive arrangement. A seal element is disposed between the shaft and the body. The seal element defines a bearing surface for permitting sealed relative rotation of the rotary drive arrangement. The tool includes a reaming member, wherein relative rotation between the body and the shaft facilitates reaming of the bore by the reaming member.Type: ApplicationFiled: December 24, 2010Publication date: July 14, 2011Inventors: Edward D. Scott, Lance S. Davis
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Publication number: 20110100723Abstract: A reaming tool in the form of reamer shoe is adapted for location in a wellbore and has a rotationally balanced nose.Type: ApplicationFiled: December 24, 2010Publication date: May 5, 2011Inventors: Edward D. Scott, Lance S. Davis
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Patent number: D307676Type: GrantFiled: July 15, 1987Date of Patent: May 8, 1990Inventor: Lance S. Davis