Patents by Inventor Graham Alexander Robertson

Graham Alexander Robertson 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).

  • Patent number: 10758848
    Abstract: The present disclosure is directed to a filtering assembly and a method of manufacturing a filtering assembly. The filtering assembly may increases an effective screening area. Specifically, embodiments disclosed herein include a screen housing having two sidewalls and two end walls, defining a perimeter with a length and a width. The screen housing also includes a top face and a bottom face. A plurality of screen segments may be positioned on the top face of the screen housing, such that the plurality of screen segments on the top face provide a screening surface area less than a total surface area of the top face.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: September 1, 2020
    Assignees: M-I L.L.C., M-I Drilling Fluids UK Ltd
    Inventors: Eric Cady, Graham Alexander Robertson, LaTosha Moore, Claire Rosaleen Galloway McLean, Andrew Ralph
  • Publication number: 20190091610
    Abstract: The present disclosure is directed to a filtering assembly and a method of manufacturing a filtering assembly. The filtering assembly may increases an effective screening area. Specifically, embodiments disclosed herein include a screen housing having two sidewalls and two end walls, defining a perimeter with a length and a width. The screen housing also includes a top face and a bottom face. A plurality of screen segments may be positioned on the top face of the screen housing, such that the plurality of screen segments on the top face provide a screening surface area less than a total surface area of the top face.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 28, 2019
    Applicants: M-I L.L.C., M-I Drilling Fluids UK Ltd
    Inventors: Eric Cady, Graham Alexander Robertson, LaTosha Moore, Claire Rosaleen Galloway McLean, Andrew Ralph
  • Patent number: 10137389
    Abstract: A filtering assembly includes a screen housing having two sidewalls and two end walls, defining a perimeter with a length and a width. The screen housing also includes a top face and a bottom face. A plurality of screen segments are positioned on the top face of the screen housing, such that the plurality of screen segments on the top face provide a screening surface area less than a total surface area of the top face, and a plurality of screen segments are positioned on the bottom face of the screen housing, such that the plurality of screen segments on the bottom face provide a screening surface area less than a total surface area of the bottom face. A total screening surface area of the filtering assembly is greater than the total surface area of the top face.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: November 27, 2018
    Assignees: M-I L.L.C., M-I Drilling Fluids UK Ltd.
    Inventors: Eric Cady, Graham Alexander Robertson, LaTosha Moore, Claire Rosaleen Galloway McLean, Andrew Ralph
  • Patent number: 10086408
    Abstract: A vibratory separator includes a screen frame having an upper screen surface and a plurality of openings and a first screen insert disposed in a first opening of the plurality of openings of the screen frame, the screen insert having a screen surface positioned at a first height above the supper screen surface. The vibratory separator also includes a second screen insert disposed in a second opening of the plurality of openings of the second screen frame, wherein a screen surface of the second screen insert is positioned at a second height. The second height may be different from the first height. A method of processing fluid includes providing a flow of fluid to a vibratory separator, and flowing the fluid over a screen having a first screen insert positioned at a first height.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: October 2, 2018
    Assignees: M-I L.L.C., UNITED WIRE, LTD.
    Inventors: Eric Cady, Graham Alexander Robertson, Claire Rosaleen Galloway McLean, LaTosha Moore, Andrew Ralph
  • Publication number: 20160101377
    Abstract: A filtering assembly includes a screen housing having two sidewalls and two end walls, defining a perimeter with a length and a width. The screen housing also includes a top face and a bottom face. A plurality of screen segments are positioned on the top face of the screen housing, such that the plurality of screen segments on the top face provide a screening surface area less than a total surface area of the top face, and a plurality of screen segments are positioned on the bottom face of the screen housing, such that the plurality of screen segments on the bottom face provide a screening surface area less than a total surface area of the bottom face. A total screening surface area of the filtering assembly is greater than the total surface area of the top face.
    Type: Application
    Filed: December 10, 2014
    Publication date: April 14, 2016
    Inventors: Eric Cady, Graham Alexander Robertson, LaTosha Moore, Claire Rosaleen Galloway McLean, Andrew Ralph
  • Publication number: 20140183143
    Abstract: A vibratory separator includes a screen frame having an upper screen surface and a plurality of openings and a first screen insert disposed in a first opening of the plurality of openings of the screen frame, the screen insert having a screen surface positioned at a first height above the supper screen surface. The vibratory separator also includes a second screen insert disposed in a second opening of the plurality of openings of the second screen frame, wherein a screen surface of the second screen insert is positioned at a second height. The second height may be different from the first height. A method of processing fluid includes providing a flow of fluid to a vibratory separator, and flowing the fluid over a screen having a first screen insert positioned at a first height.
    Type: Application
    Filed: December 10, 2013
    Publication date: July 3, 2014
    Applicants: United Wire, Ltd., M-I L.L.C.
    Inventors: Eric Cady, Graham Alexander Robertson, Claire Rosaleen Galloway McLean, LaTosha Moore, Andrew Ralph
  • Patent number: 8596464
    Abstract: A frame over which woven wire mesh is to be stretched and secured to form a sieving screen and which can be used to screen solids from drilling mud recovered from down-hole when drilling for oil or gas. The frame is a rectilinear moulded plastics frame having edge regions by which it is secured in place in a shaker. Within the frame is a plurality of rectilinear windows formed by an orthogonal array of intersecting ribs also of moulded plastics material. Some of the ribs are internally reinforced by rigid metal members which extend orthogonally between hollow box-section members which define a sub-frame for reinforcing the four edge regions of the frame. The orthogonal members are secured at their ends to the sub-frame. The ends of the sub-frame members are joined at the four corners of the sub-frame. In this way not are only the edge regions of the frame reinforced internally but so also are some of the orthogonally intersecting ribs, so as thereby to produce a rigid frame for the screen.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: December 3, 2013
    Assignee: United Wire Limited
    Inventor: Graham Alexander Robertson
  • Patent number: 7819254
    Abstract: A frame over which woven wire mesh is to be stretched and secured to form a sieving screen and which can be used to screen solids from drilling mud recovered from down-hole when drilling for oil or gas. The frame is a rectilinear moulded plastics frame having edge regions by which it is secured in place in a shaker. Within the frame is a plurality of rectilinear windows formed by an orthogonal array of intersecting ribs also of moulded plastics material. Some of the ribs are internally reinforced by rigid metal members which extend orthogonally between hollow box-section members which define a sub-frame for reinforcing the four edge regions of the frame. The orthogonal members are secured at their ends to the sub-frame. The ends of the sub-frame members are joined at the four corners of the sub-frame. In this way not are only the edge regions of the frame reinforced internally but so also are some of the orthogonally intersecting ribs, so as thereby to produce a rigid frame for the screen.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: October 26, 2010
    Assignee: United Wire Limited
    Inventor: Graham Alexander Robertson
  • Patent number: 7810649
    Abstract: A frame over which woven wire mesh is to be stretched and secured to form a sieving screen and which can be used to screen solids from drilling mud recovered from down-hole when drilling for oil or gas. The frame comprises a rectilinear molded plastics frame having edge regions by which it is secured in place in a shaker. Within the frame is a plurality of rectilinear windows formed by an orthogonal array of intersecting ribs also of molded plastics material. Some of the ribs are internally reinforced by a structure comprising two spaced apart layers of orthogonal intersecting spaced apart wires, running parallel to the length and breadth of the rectilinear shape of the frame within the ribs to increase their rigidity. The edge regions of the frame are reinforced internally by metal box-section members joined at their four corners and defining perimeter reinforcement, and the ends of the wires are secured to the box-section members.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: October 12, 2010
    Assignee: United Wire Limited
    Inventor: Graham Alexander Robertson
  • Publication number: 20100219110
    Abstract: A frame over which woven wire mesh is to be stretched and secured to form a sieving screen and which can be used to screen solids from drilling mud recovered from down-hole when drilling for oil or gas. The frame is a rectilinear moulded plastics frame having edge regions by which it is secured in place in a shaker. Within the frame is a plurality of rectilinear windows formed by an orthogonal array of intersecting ribs also of moulded plastics material. Some of the ribs are internally reinforced by rigid metal members which extend orthogonally between hollow box-section members which define a sub-frame for reinforcing the four edge regions of the frame. The orthogonal members are secured at their ends to the sub-frame. The ends of the sub-frame members are joined at the four corners of the sub-frame. In this way not are only the edge regions of the frame reinforced internally but so also are some of the orthogonally intersecting ribs, so as thereby to produce a rigid frame for the screen.
    Type: Application
    Filed: May 17, 2010
    Publication date: September 2, 2010
    Applicant: UNITED WIRE LIMITED
    Inventor: Graham Alexander Robertson
  • Publication number: 20090139909
    Abstract: A frame over which woven wire mesh is to be stretched and secured to form a sieving screen and which can be used to screen solids from drilling mud recovered from down-hole when drilling for oil or gas. The frame comprises a rectilinear moulded plastics frame having edge regions by which it is secured in place in a shaker. Within the frame is a plurality of rectilinear windows formed by an orthogonal array of intersecting ribs also of moulded plastics material. Some of the ribs are internally reinforced by a structure comprising two spaced apart layers of orthogonal intersecting spaced apart wires, running parallel to the length and breadth of the rectilinear shape of the frame within the ribs to increase their rigidity. The edge regions of the frame are reinforced internally by metal box-section members joined at their four corners and defining perimeter reinforcement, and the ends of the wires are secured to the box-section members.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 4, 2009
    Inventor: Graham Alexander Robertson
  • Patent number: RE45746
    Abstract: A method of forming a shaker screen includes forming a frame, and attaching a first sealing element to at least one side of an outer perimeter of the frame, wherein the attaching comprises aligning a first mating surface of the frame to a second mating surface of the first sealing element, and wherein the first mating surface of the frame includes an extension, and the second mating surface of the first sealing element includes a groove configured to align with the extension. A system of sealing shaker screens includes a first screen and a second screen disposed adjacent the first screen, wherein a first sealing element of a first frame and a portion of the second screen interact to provide a seal between the first screen and the second screen.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: October 13, 2015
    Assignees: M-I L.L.C., United Wire Limited
    Inventors: Brian S. Carr, Graham Alexander Robertson, Eric Cady