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Seal structure for a rectilinear motion system and piston member
PATENTS Tie-back seal assembly Applicant: Halliburton Energy Services Inc, USA Details of a tie-back seal system are disclosed. The system comprises a tie-back seal assembly, including an outer sleeve; an inner sleeve, disposed within the outer sleeve; a shear pin, extending through the outer and inner sleeves; and a ratch-latch pin, coupled to and disposed downhole from the inner sleeve. The system also includes a tie-back liner disposed within the inner sleeve and coupled to the outer and inner sleeves using the shear pin, such that the latter prevents axial movement of the tie-back liner relative to the outer and inner sleeves. The system further includes a tie-back receptacle that is configured to engage the ratch-latch pin in order to prevent axial movement of the inner sleeve and tie-back liner in an uphole direction and a shoulder which, when in contact with the outer sleeve, prevents axial movement of this sleeve in a downhole direction. Patent number: WO/2016/039738 Inventors: A.R. Gharesi and R.Y.L. Chua Publication date: 17 March 2016
Seal structure for a rectilinear motion system and piston member Applicant: Nejilaw Inc, Japan This invention concerns a fluid seal for a rectilinear motion system. The seal structure is provided with a piston member, which forms part of at least a piston body and which has an insertion hole, which is capable of receiving a rectilinearly movable rod. An annular outer seal fitting section, which is formed in the outer peripheral surface of the piston member, has a smaller diameter than the seal section, and is continuous with either of a pair of axially facing end surfaces. An annular outer seal member comes into contact with the outer seal fitting section of the piston member, and an outer seal retaining member, which is disposed near an end surface of the piston member, axially presses the outer seal member. As a result, the rectilinear motion system’s seal
January 2017
structure can be assembled easily and possesses enhanced sealing performance. Patent number: WO/2016/039308 Inventor: H. Michiwaki Publication date: 17 March 2016
Sealing ring Applicant: American Seal and Engineering Co Inc, USA The sealing ring (10) described by this patent incorporates, in a diametrical cross-section, a body section, angularly spaced sealing legs (16 & 18) that extend from the body section and angularly spaced sealing legs (22 & 24) that also extend from the body section. Each sealing leg (16, 18, 22 & 24) extends to a bevelled end (28, 30, 32 & 34), respectively. The bevelled ends form a seal with a surface when the sealing ring (10) is subjected to a compressive force. Sealing legs (16 & 24) are coplanar, as are sealing legs (18 & 22). A first centring leg (40) extends from the body section and is between the sealing legs (16 & 22). A second centring leg (44) extends from the body section, and is between the sealing legs (18 & 24). The first and second centring legs (40 & 44) are also coplanar. The design and configuration of the sealing ring enables it to be used in situations in which there are two sources of pressure – one on either side of the ring, and each source can involve a positive or negative pressure. Patent number: WO/2016/040569 Inventors: M.W. Armitage and D. Conway Publication date: 17 March 2016
side-surfaces. A seal is positioned within the central space. The seal in this example consists of a ring. First and second lobes are positioned on opposite sides of the ring. The first lobe has a first lobe-surface facing towards the first side-surface, whilst the second lobe has a second lobe-surface facing towards the second side-surface. When the seal is seated within the channel, at least a portion of the first and second lobe surfaces are in contact with the sidewalls, such that the lobes deform towards the centre of the channel. A connection member is positioned at one end of each of the segments in this example. These members, on the segments, can be adjusted and tightened in order to draw the segments towards one another and seat the ring within the channel, thereby deforming the seal. Patent number: WO/2016/040102 Inventors: K.J. Blease, J.P. Brandt, C. Haney, S.A. Wortmann and D.R. Dole Publication date: 17 March 2016
Coupling and seal Applicant: Victaulic Co, USA This invention concerns a coupling for joining pipe elements end to end. In one embodiment described, the coupling comprises a plurality of segments attached to one another (end to end) and surrounding a central space. Each of the segments has a channel extending circumferentially around and facing the central space. Furthermore, each of the channels is defined by first and second side-surfaces, located on opposite sides of the segments, and a back-surface extending between these
An isometric view (top) and bottom view (bottom) of the sealing ring that is detailed by patent WO/2016/040569.
Sealing Technology
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Seal structure for a rectilinear motion system and piston member Applicant: Nejilaw Inc, Japan This invention concerns a fluid seal for a rectilinear motion system. The seal structure is provided with a piston member, which forms part of at least a piston body and which has an insertion hole, which is capable of receiving a rectilinearly movable rod. An annular outer seal fitting section, which is formed in the outer peripheral surface of the piston member, has a smaller diameter than the seal section, and is continuous with either of a pair of axially facing end surfaces. An annular outer seal member comes into contact with the outer seal fitting section of the piston member, and an outer seal retaining member, which is disposed near an end surface of the piston member, axially presses the outer seal member. As a result, the rectilinear motion system’s seal
January 2017
structure can be assembled easily and possesses enhanced sealing performance. Patent number: WO/2016/039308 Inventor: H. Michiwaki Publication date: 17 March 2016
Sealing ring Applicant: American Seal and Engineering Co Inc, USA The sealing ring (10) described by this patent incorporates, in a diametrical cross-section, a body section, angularly spaced sealing legs (16 & 18) that extend from the body section and angularly spaced sealing legs (22 & 24) that also extend from the body section. Each sealing leg (16, 18, 22 & 24) extends to a bevelled end (28, 30, 32 & 34), respectively. The bevelled ends form a seal with a surface when the sealing ring (10) is subjected to a compressive force. Sealing legs (16 & 24) are coplanar, as are sealing legs (18 & 22). A first centring leg (40) extends from the body section and is between the sealing legs (16 & 22). A second centring leg (44) extends from the body section, and is between the sealing legs (18 & 24). The first and second centring legs (40 & 44) are also coplanar. The design and configuration of the sealing ring enables it to be used in situations in which there are two sources of pressure – one on either side of the ring, and each source can involve a positive or negative pressure. Patent number: WO/2016/040569 Inventors: M.W. Armitage and D. Conway Publication date: 17 March 2016
side-surfaces. A seal is positioned within the central space. The seal in this example consists of a ring. First and second lobes are positioned on opposite sides of the ring. The first lobe has a first lobe-surface facing towards the first side-surface, whilst the second lobe has a second lobe-surface facing towards the second side-surface. When the seal is seated within the channel, at least a portion of the first and second lobe surfaces are in contact with the sidewalls, such that the lobes deform towards the centre of the channel. A connection member is positioned at one end of each of the segments in this example. These members, on the segments, can be adjusted and tightened in order to draw the segments towards one another and seat the ring within the channel, thereby deforming the seal. Patent number: WO/2016/040102 Inventors: K.J. Blease, J.P. Brandt, C. Haney, S.A. Wortmann and D.R. Dole Publication date: 17 March 2016
Coupling and seal Applicant: Victaulic Co, USA This invention concerns a coupling for joining pipe elements end to end. In one embodiment described, the coupling comprises a plurality of segments attached to one another (end to end) and surrounding a central space. Each of the segments has a channel extending circumferentially around and facing the central space. Furthermore, each of the channels is defined by first and second side-surfaces, located on opposite sides of the segments, and a back-surface extending between these
An isometric view (top) and bottom view (bottom) of the sealing ring that is detailed by patent WO/2016/040569.
Sealing Technology
15