Patents by Inventor David Niven
David Niven 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: 8186246Abstract: A clamping mechanism having two or more jaws which may be opened to allow a tubular to be introduced within the jaws and closed to retain the tubular therewithin. The rollers are located within concave recesses and maintained in spaced apart relationship by biasing means, whereby rotation of tubular may cause the rollers to be wedged between a wall of the recess and the tubular to grip the tubular within the jaws. The clamping mechanism may be utilized as an oil field tubular clamp, a slip, a pipe clamp, and other mechanisms. There is also disclosed a clutch comprising an outer race, a cage, and an inner ring. Recesses are provided in an outer race and accommodate rollers therewith and maintained in spaced apart relationship by the cage. The cage may be moved by an actuator to selectively allow free wheeling or prevent rotation. A socket ratchet incorporating such a clutch is also disclosed.Type: GrantFiled: March 24, 2005Date of Patent: May 29, 2012Assignee: Weatherford/Lamb, Inc.Inventor: David Niven
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Patent number: 7758087Abstract: An apparatus configured to a downhole tubular to a pump. The apparatus comprises: a body portion having a bore; a locking assembly comprising at least one locking member pivotally mounted to the body portion so as to permit the locking member to be pivoted between an open position in which the downhole tubular can be inserted into the bore of the body portion, and a closed position in which the locking member engages the downhole tubular so as to lock the downhole tubular in the bore of the body portion. Fixing means is provided for fixing the looking member in the closed position. A method of drilling a wellbore using a borehole casing.Type: GrantFiled: June 9, 2008Date of Patent: July 20, 2010Assignee: Weatherford/Lamb, Inc.Inventors: David Niven, Dennis Robert Mario Fernandes
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Publication number: 20080303266Abstract: An apparatus configured to a downhole tubular to a pump. The apparatus comprises: a body portion having a bore; a locking assembly comprising at least one locking member pivotally mounted to the body portion so as to permit the locking member to be pivoted between an open position in which the downhole tubular can be inserted into the bore of the body portion, and a closed position in which the locking member engages the downhole tubular so as to lock the downhole tubular in the bore of the body portion. Fixing means is provided for fixing the looking member in the closed position. A method of drilling a wellbore using a borehole casing.Type: ApplicationFiled: June 9, 2008Publication date: December 11, 2008Inventors: David Niven, Dennis Robert Mario Fernandes
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Patent number: 7384077Abstract: An apparatus configured to a downhole tubular to a pump. The apparatus comprises: a body portion having a bore; a locking assembly comprising at least one locking member pivotally mounted to the body portion so as to permit the locking member to be pivoted between an open position in which the downhole tubular can be inserted into the bore of the body portion, and a closed position in which the locking member engages the downhole tubular so as to lock the downhole tubular in the bore of the body portion. Fixing means is provided for fixing the looking member in the closed position. A method of drilling a wellbore using a borehole casing.Type: GrantFiled: December 12, 2006Date of Patent: June 10, 2008Assignee: Weatherford/Lamb, Inc.Inventors: David Niven, Dennis Robert Mario Fernandes
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Publication number: 20070152445Abstract: An apparatus configured to a downhole tubular to a pump. The apparatus comprises: a body portion having a bore; a locking assembly comprising at least one locking member pivotally mounted to the body portion so as to permit the locking member to be pivoted between an open position in which the downhole tubular can be inserted into the bore of the body portion, and a closed position in which the locking member engages the downhole tubular so as to lock the downhole tubular in the bore of the body portion. Fixing means is provided for fixing the looking member in the closed position. A method of drilling a wellbore using a borehole casing.Type: ApplicationFiled: December 12, 2006Publication date: July 5, 2007Inventors: David Niven, Dennis Fernandes
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Patent number: 7147254Abstract: An apparatus configured to a downhole tubular to a pump. The apparatus comprises: a body portion having a bore; a locking assembly comprising at least one locking member pivotally mounted to the body portion so as to permit the locking member to be pivoted between an open position in which the downhole tubular can be inserted into the bore of the body portion, and a closed position in which the locking member engages the downhole tubular so as to lock the downhole tubular in the bore of the body portion. Fixing means is provided for fixing the looking member in the closed position. A method of drilling a wellbore using a borehole casing.Type: GrantFiled: October 16, 2001Date of Patent: December 12, 2006Assignee: Weatherford/Lamb, Inc.Inventors: David Niven, Dennis Robert Mario Fernandes
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Publication number: 20050160881Abstract: A clamping mechanism having two or more jaws which may be opened to allow a tubular to be introduced within the jaws and closed to retain the tubular therewithin. The rollers are located within concave recesses and maintained in spaced apart relationship by biasing means, whereby rotation of tubular may cause the rollers to be wedged between a wall of the recess and the tubular to grip the tubular within the jaws. The clamping mechanism may be utilized as an oil field tubular clamp, a slip, a pipe clamp, and other mechanisms. There is also disclosed a clutch comprising an outer race, a cage, and an inner ring. Recesses are provided in an outer race and accommodate rollers therewith and maintained in spaced apart relationship by the cage. The cage may be moved by an actuator to selectively allow free wheeling or prevent rotation. A socket ratchet incorporating such a clutch is also disclosed.Type: ApplicationFiled: March 24, 2005Publication date: July 28, 2005Inventor: David Niven
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Publication number: 20050097993Abstract: Gripping apparatus comprises a plurality of axially tapered rollers (47) for engaging the gripped member; and a body having a cam surface (36) which is shaped so as to urge the rollers, when in use, against the gripped member when the rollers slide axially with respect to the cam surface. The cam surface is also shaped so as to urge the rollers, when in use, against the gripped member when the rollers roll along the cam surface.Type: ApplicationFiled: November 26, 2002Publication date: May 12, 2005Inventor: David Niven
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Publication number: 20040046387Abstract: Apparatus for coupling a downhole tubular (3) to a pump (2). The apparatus comprises: a body portion having a bore (5); a locking assembly comprising at least one locking member (16, 17)=pivotally mounted to the body portion so as to permit the locking member to be pivoted between an open position in which the downhole tubular can be inserted into the bore of the body portion, and a closed position in which the locking member engages the downhole tubular so as to lock the downhole tubular in the bore of the body portion. Fixing means (22) is provided for fixing the locking member in the closed position.Type: ApplicationFiled: October 2, 2003Publication date: March 11, 2004Inventors: David Niven, Dennis Robert Mario Fernandes
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Publication number: 20020144575Abstract: A clamping mechanism having two or more jaws (1, 2) which may be opened to allow a tubular (5) to be introduced within the jaws and closed to retain the tubular (5) therewithin. Rollers 4 are located within concave recesses 3 and maintained in spaced apart relationship by biasing means 6. Rotation of tubular 5 may cause the rollers 4 to be wedged between a wall of the recess and tubular 5 to grip tubular 5 within jaws 1 and 2. The clamping mechanism may be utilised as an oil field tubular clamp, a slip, a pipe clamp etc.Type: ApplicationFiled: March 15, 2002Publication date: October 10, 2002Inventor: David Niven
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Patent number: 4210538Abstract: Apparatus for removing suspended solids from electroplating solutions and the like includes a housed cluster of slotted plastic tubes about which are fitted fabric filter sleeves and through which the solution is normally forced into the tubes continuously in the course of filtering. The process is interrupted relatively briefly when likely to be impaired by solids build-up, and flushing with water at a common utility-source pressure is then uniquely valved to take place in the reversed direction sequentially through the several sleeves by way of relatively slender sparger pipes each mated within a companion one of the slotted tubes and proportioned to spray a multiplicity of fine high-velocity streams through the slots and forcefully directly against the surrounding filter sleeving, to dislodge particulate material for drainage.Type: GrantFiled: March 31, 1978Date of Patent: July 1, 1980Assignee: Bob Baker Enterprises, Inc.Inventors: Robert M. Tantillo, David A. Niven