Abstract: A system and a method for isolating pressure in a wellbore are described. The system includes a body, a first packer, a second packer, and a control assembly. The body couples to a wellhead and casing. The first packer is disposed within the body and fluidically seals the wellbore providing a first sealing boundary. The second packer is disposed within the body above the first packer to fluidically seal the first packer from the atmosphere providing a second sealing boundary. The first packer and the second packer are spatially arranged within the body to define a packer cavity. The control assembly senses a wellbore pressure on a bottom surface of the first packer, senses a packer cavity pressure, and compares the wellbore pressure to the packer cavity pressure to determine that the wellbore is fluidically sealed from the packer cavity.

Abstract: A connector assembly may include an elastomeric connector comprising an approximately perpendicular flange at a distal end thereof and an opening therethrough; and a rigid compression fitting having an opening aligned with the opening of the elastomeric connector. The connector assembly may be used with a converter hose. Related methods include attaching the converter hose to a shower head, faucet or spigot.

Abstract: A pass through passage assembly of a gas turbine engine includes a compartment wall located between a first compartment and a second compartment, and a wall opening in the compartment wall connecting the first compartment and the second compartment, the wall opening having a central axis. A passage insert extends from the first compartment to the second compartment. A seal plate is positioned at the second compartment and extends about the central axis such that the compartment wall is located between an insert flange and the seal plate. A backing plate is positioned and retained between seal plate and the compartment wall, with the seal plate, the backing plate, the compartment wall, and the passage insert defining a seal cavity therebetween. A rope seal is located in the seal cavity and is retained in the seal cavity by the backing plate, the seal plate and the passage insert.

Abstract: An integrated multi-pressure fracking adapter apparatus comprising a cylindrical body for mounting on a wellhead casing head, having an exterior circumference, an interior circumference creating a cylindrical passage perpendicular to the radius, pipe and casing seals within the cylindrical passage, a high pressure mounting surface, a low pressure mounting surface, fasteners for securing to wellhead components, an external sealing surface, and a testing port whereby a user installs an integrated multi-pressure fracking adapter in between a lower pressure casing head and a high-pressure fracking valve assembly, injects packing material, verifies the seals functionality, and begins fracking with high pressure fracking fluids thereby reducing costs of high pressure equipment and manhours involved removing and replacing the low pressure rated well head components with high pressure well head components for fracking then restoring the original components.

Abstract: A system formed to provide sealed passage therethrough for cables, lines, tubes or the like through the wellhead and down-hole applications. A unitary or split/wrap around hanger is provided having a main seal formed to receive and provide sealed pass-through of power and control cables, lines, conduits, or other components threaded therethrough, which main seal may have various profiles to accommodate diverse component configurations. Hinged side doors engage and support various configuration (via interchangeable inserts) and/or size components such as cable(s), line(s), conduit(s), etc. in the hanger to engage components threaded therethrough. A bowl cap, tubing adapter or other surface component with adapters is provided to allow sealed-pass through of components therethrough, and swivel flanges provide an option to ease installation.

Abstract: A metal ring seal capable of providing a fluid seal between two downhole assemblies. The ring seal has a “C” shape, is initially located inside one of the downhole assemblies adjacent to an internal wedged section of that assembly and has an inner diameter that is at least as large as the outer diameter of the second downhole assembly. When the ring seal is moved along the internal wedged section into a sealing position, the two ends of the “C” shape sealingly contact each other and the inner diameter of the ring is smaller than the outer diameter of the second assembly so as to create a seal between the first and second assemblies.

Abstract: An improved clamp ring system comprises a clamp ring having a wedge shaped seal face; a reactor having a clamp ring mounting recess; a quartz sleeve disposed within the clamp ring mounting recess; a seal being disposed within the clamp ring mounting recess around the quartz sleeve. The clamp ring is removably attached to the reactor near the clamp ring mounting recess such that the wedge shaped seal face compresses the seal against the quartz sleeve.

Abstract: A sealing structure suppresses possible damage to a seal ring because of a backup ring. The sealing structure is characterized in that a cut portion 150 that is cut in a planar shape is formed in a backup ring 100 at one position in a circumferential direction, the cut portion 150 is configured such that a cut surface 153 is oblique to a central axis of the backup ring 100, an acute angle of angles between a surface on the high pressure side of the backup ring 100 and the cut surface 153 is set to not less than 15° and not more than 30°, and the backup ring 100 is formed of a resin material having Rockwell hardness of 100 or less, durometer hardness of 70 or less, and elastic modulus of 1.0 GPa or less.

Abstract: A system includes a control block configured to be coupled to a tree of a wellhead assembly. The control block includes a housing and a plate supported by the housing and having a radially inner wall defining an opening configured to receive a tubing member extending from the tree. The control block also includes a first recess extending circumferentially about the radially inner wall of the plate and configured to support a first annular seal to facilitate sealing the tubing member within the opening while the tubing member is positioned within the opening. The control block may also include a second recess extending circumferentially about the radially-inner wall of the opening and configured to support a second annular seal.

Abstract: A pressure measuring instrument having a sensor carrier, a casing, a plug connector, evaluation electronics, and a pressure sensor. The sensor carrier supports the pressure sensor adapted to output a pressure-proportional, electrically detectable pressure signal. The sensor carrier has a base body, a pressure terminal formed together with the base body to be connected to the source of the pressure to be detected, and a seat having several different circle geometries, each having an annular surface adapted for mounting a pressure sensor. The pressure terminal has a connecting channel opening inside the seat, and the annular surfaces of the individual circle geometries are axially staggered with respect to the port of the connecting channel, wherein the annular surface having the smallest diameter is closest to the connecting channel port.

Abstract: A fitting device includes a fitting body having an interior surface defining an interior, a packing assembly maintained within the fitting body interior, a retaining nut, and a shoe member maintained between the retaining nut and the axially outer rim of the fitting body, whereupon inserted tubes or pipes can be securely inserted into the fitting interior and maintained therein.

Abstract: A fitting device includes a fitting body having an interior surface defining an interior, a packing assembly maintained within the fitting body interior, a retaining nut, and a shoe member maintained between the retaining nut and the axially outer rim of the fitting body, whereupon inserted tubes or pipes can be securely inserted into the fitting interior and maintained therein.

Abstract: A geothermal expansion spool assembly includes an integrated or single piece configuration. The geothermal expansion spool assembly comprises an upper portion adapted to directly couple to a production valve and a lower portion adapted to surround and engage with a surface casing of a geothermal well, wherein the upper and lower portion are permanently fixed to one another.

Abstract: The present invention provides an oil and gas reservoir electronic logging overflow safety control wireline hanger which comprises a body (1) and a wireline clamping apparatus. Threads (5) are provided on a part of the outer surface of the upper end of the body (1). An entry opening (12) extending along a vertical direction is provided in the body (1) to receive the wireline. A tapering-down, truncated cone shaped passage (2) is provided inside the body (1). A detachable support apparatus (9) is fixed on the upper part of the body (1). The wireline clamping apparatus comprises two wedges (3), and each has a sector shaped cross-section and tapering-down truncated cone shape corresponding to the passage (2). The wedges are symmetrically fixed inside the passage (2) so that a wireline hole (4), with a diameter less than that of the wireline, is formed between the two wedges (3).

Abstract: An annular seal assembly for forming a seal between two annular surfaces. The seal assembly includes an annular base including a sealing surface. The seal assembly also includes a pair of spaced apart rims extending from the annular base opposite the base sealing surface and in opposite directions, the rims also including sealing surfaces. The base is elastically deformable and the rims are elastically deformable relative to the base to effect a self-energized seal between the two annular surfaces.

Abstract: A breathing filter system for a vaporizer system includes a connector comprising a first portion comprising a conduit manifold comprising having lumens; a second portion comprising an interface plug comprising a plug end; an external surface comprising ribs and grooves, the second portion further comprising openings in communication with the lumens of the conduits, each lumen communicating with a single opening, the openings being arranged in the grooves; and, a breathing filter system assembly comprising a housing comprising a first section including a first port, a second section including a second port, providing a bi-directional flow path between the ports; a gas reflection device, and a heat and moisture exchanging breathing filter, disposed in the housing across the fluid flow path, the breathing filter arranged in the first section, and the gas reflection device arranged in the second section; wherein the housing is in communication with the first portion.

Abstract: A compliant element has first and second sections which are separated by a gap. The first and second sections have respective surfaces opposing each other across the gap. The first and second sections are interconnected by flexure elements which are integral with the first and second sections and which extend across the gap. At least part of each flexure element extends obliquely across the gap. Movement of the sections towards and away from each other is accompanied by flexing of the flexure elements.

Abstract: A wellhead seal assembly that forms a metal-to-metal seal between inner and outer wellhead members and a face seal between inner wellhead members. The face seal is created by two opposing sealing surfaces on inner wellhead members that sealingly engage each other. The inner wellhead members that interact to form a face seal may be a casing hanger, bridging hanger, or lockdown hanger. A wicker profile formed on one of the opposing seal surfaces bites into the opposing seal surface in response to a load. The face seal is designed such that well pressure enhances the face seal.

Abstract: A diverter for redirecting drilling fluid in oilfield applications includes a support housing and a diverter body disposed therein. A lateral opening defined in the diverter body permits fluid communication between an interior passage of the diverter body and a lateral now outlet defined by the support housing. A pair of flow-line seals disposed radially between the support housing and the diverter body includes a flow-line seal disposed on axially upper and lower sides of the lateral flow outlet. The flow-line seals include a pair of substantially rigid support rings and first and second sealing bodies adhered thereto. The first sealing body is affixed to an inner diameter wall of the first and second support rings and extends to axially upper and lower walls of the support rings. The second sealing body is bonded axially between the support rings.

Abstract: The present high pressure mechanical seal features a novel configuration capable of sealing from one up to simultaneously five power conduction lines, flow injection lines or control lines, in the same device. Adaptable to different configurations, types and size of conduction lines existing in the industry. The power conduction lines can be a cable of an electro-submersible pump or the cable in a down hole heater; the flow and control lines can be diluents injector capillaries or data and instrumentation cables or any other type of conduction line which can enter the inner atmosphere of the wellbore. Conduction lines are generally shaped as uniform cylindrical elements, which vary in diameter and material due to the cylindrical geometry, are adaptable to the sealing system of the present invention, such that the equipment can seal from only one line up to five lines depending on the requirement of the user.

Abstract: A composite includes a porous matrix that includes a molybdenum-silicon-boron (Mo—Si—B) alloy that has a plurality of pores with a lubricant in contact with the Mo—Si—B alloy, a hydrophobic compound in contact with the Mo—Si—B alloy, or a combination thereof. A method for preparing a porous composite includes disposing a porous matrix comprising a Mo—Si—B alloy on a substrate, the Mo—Si—B alloy comprising a plurality of pores; disposing a lubricant on a surface of the porous matrix; and disposing a hydrophobic compound on a surface of the porous matrix to form the porous composite.

Abstract: A seal assembly, method for sealing a seal assembly and a modular seal unit for a rotating control device for use in an offshore environment. The modular seal unit includes a first outer housing, a first seal housing lockable within the first outer housing, and a first sealing element disposed on a lower end of the first seal housing. The first sealing element includes a throughbore configured to receive a drill pipe, and a sealing surface configured to seal against the drill pipe. The modular seal unit also includes a first connector configured to couple the first seal housing to the first outer housing, and a second connector configured to couple the first seal housing to one selected from a second outer housing of a second modular seal unit or a running tool adapter.

Abstract: A sealing system features a primary and secondary bullet seals where the secondary seal is preferably bidirectional and is activated to spread fins with a t-shaped ring that is driven with differential pressure to advance after temperature exposure softens a stop material on the extending portion of the t-shaped ring. Opposed t-shaped rings are disposed at ends of the backup ring that have fins at both ends. Advancement of the t-shaped ring spreads the fins and retains them in the spread condition for enhanced sealing. Optionally the primary seal can also be actuated with a similar t-shaped ring with a temperature sensitive delay feature.

Abstract: An adjustable casing sub having an outer housing, an inner housing insertable into the outer housing, and a ratcheting system for coupling the inner housing within the outer housing. An annulus is between a portion of the inner and outer housing, the annulus including an inwardly tapered section. A metal faced seal is disposed in the annulus, wherein the metal faced seal includes a sliding surface and a compressive sealing surface. The sliding surface may include a malleable inlay and the compressive sealing surface may include a spring like element. Moreover, the metal faced seal radial thickness is greater than the inwardly tapered section radial thickness.

Abstract: A device for producing a bore in the ground includes a spindle comprising a rotary lead-through and a first sealing face configured to be cylindrical. The spindle is configured so as to be rotatably led through a housing via the rotary lead-through. The housing comprises a second sealing face configured to be concentric with respect to the first sealing face. A rotary seal arrangement is configured to seal the rotary lead-through of the spindle through the housing. The rotary seal arrangement comprises a shaft seal configured to act between the first sealing face of the spindle and the second sealing face of the housing. A labyrinth seal is arranged upstream of the shaft seal when viewed from an outside of the housing.

Abstract: A seal assembly capable of low temperature service is disclosed. It features upper and lower metallic backup rings that are specially shaped to act as a spring to keep the sidewalls of such rings in contact with the inside and outside surfaces to be sealed to prevent extrusion of the seal material even in low temperature situations. Inner and outer grooves are provided. O-ring seals, used for the ID of the seal, are manufactured to have a slightly greater diameter than the groove into which they will be installed. The greater length provides stored energy to promote sealing functionality in cold temperature situations. The O-rings used for the OD of the seal are manufactured to have a slightly smaller diameter than the groove into which they will be installed. The shorter length provides stored energy to promote sealing functionality in cold temperature situations.

Abstract: A seal assembly for sealing an annulus between inner and outer wellhead members includes an energizer ring formed of a high strength elastic material having inner and outer legs. An annular inner recess with grooves on its base is formed on an inward facing surface of the inner leg. An inner diameter seal ring formed of an inelastic material engages the grooves of the inner recess. An annular outer recess with grooves on its base is formed on an outward facing surface of the outer leg. An outer diameter seal ring formed of an inelastic material engages the grooves of the outer recess. When the energizer ring is coaxially inserted in the annulus, the inner diameter seal ring is compressively and permanently deformed into sealing contact with the inner wellhead member, and the outer diameter seal ring is compressively and permanently deformed into sealing contact with the outer wellhead member.

Abstract: A subterranean wellbore assembly includes an outer cylindrical wall and an inner cylindrical wall cooperatively defining an annular space. A seal assembly is disposed within the annular space. The seal assembly includes chevron seals. Each chevron seal includes a central portion and two axially and radially extending wing portions. Chevron seals may be of polymeric PEEK material or of nickel based material. Other seal assemblies may be arranged in the annular space in place of the seal assembly.

Abstract: A seal section for use in a downhole submersible pumping system includes a modular seal bag assembly having a first end cap, a second end cap and a plurality of seal bags connected between the first and second end caps. Each of the first and second end caps includes a plurality of nozzles and each of the plurality of seal bags is connected to a unique pair of nozzles on the first and second end caps. The modular seal bag assembly further includes a shaft tube connected between the first and second end caps. In a second preferred embodiment, the present invention provides a seal section that includes a single seal bag connected between two opposing end caps. The seal bag is preferably seamless and fabricated from a fluoropolymer, such as perfluoroalkoxy (PFA).

Abstract: The present disclosure provides a casing seal for a wellhead, including a casing with an internal surface having an annular groove therein. A fluid seal is disposed in the annular groove and includes an internal bead for sealing against a cylindrical surface of an inner case or tube. A swellable material is disposed within the annular groove and surrounds the fluid seal. An energizing port is in communication with the annular groove for delivering fluid to the swellable material to cause the swellable material to expand and further load the fluid seal.

Abstract: A system, in certain embodiments, has a composite seal with both a metal shell and an elastic core, such as an elastomer core. In one embodiment, the composite seal has an annular metal shell with a top, a bottom, and a seal interface disposed between the top and the bottom. The composite seal also has an elastomer disposed within the annular metal shell, wherein the elastomer is configured to impart pressure against the seal interface.

Abstract: An annular seal having a sealing member and method for use is provided for sealing an item of oilfield equipment. The annular seal has an inner diameter for receiving the item of oilfield equipment and a frame. The seal member is contiguous with the frame. The annular seal is configured for durability, in that it resists wear, inversion, increases lubricity, enables tightness, and/or otherwise generally increases endurance, toughness, and/or permanence.

Abstract: A wellhead system comprising a seal with a restraining member adapted to cooperate with a housing to restrict axial movement of the seal. The seal is adapted to form a seal between the housing, such as a wellhead, and a tubular member, such as a casing hanger. The seal has a latch ring that is expanded outward as the seal is installed within the wellhead. Axial movement of the seal is restricted by engagement between the expanded latch ring and the inner profile of the housing. The seal and housing may be adapted so that a portion of the seal is received by a recess in the inner profile of the housing.

Abstract: A multi-barrier seal system, including, a first seal assembly configured to provide a first sealing barrier between an auxiliary line and a mineral extraction system, and a second seal assembly configured to provide a second sealing barrier between the auxiliary line and the mineral extraction system, wherein the second seal assembly is configured to shear through the auxiliary line.

Abstract: A pack-off device, including a body having a first feedthrough and a second feedthrough formed therein. A projection extends from the body and is operatively arranged to engage a restriction of an adjacent structure. At least one seal element is arranged with the body for sealing the device against the adjacent structure when the projection is engaged with the restriction. A method of arranging and operating a completion system is also included.

Abstract: A sealing assembly including a seal element at least partially formed from a shape memory material. The shape memory material urges the seal element to revert to an original shape upon exposure to a transition stimulus. The seal element is operatively arranged for sealing against a downhole structure when in the original shape. An interlock mechanism is included for holding the seal element in a deformed position in which the seal element is not able to seal against the downhole structure even after exposure to the transition stimulus. A method of setting a downhole sealing assembly is also included.

Abstract: A sealing element includes an elastomeric matrix; a plurality of incorporants embedded in the matrix.

Abstract: The present disclosure relates to seals and sealing arrangements, especially those used in wireline valves. The seal comprises an elastomeric seal body with a sealing surface, a plurality of generally planar inserts embedded within the elastomeric seal body adjacent the sealing surface, and having elastomeric seal material disposed between the plurality of generally planar inserts. The generally planar inserts may have a slightly wedge shape and may be embedded into the elastomeric seal body in a generally fan-shaped orientation. They may be orientated such that upon contacting a substantially tubular shaped body to be sealed around and the subsequent deformation of the seal body about said substantially tubular shaped body, the plurality of generally planar inserts become orientated such that they extend radially from the substantially tubular shaped body.

Abstract: A seal assembly is inserted within an annulus between inner and outer coaxially disposed annular members having a common axis. The seal assembly includes a seal stack having a compliant element sandwiched between two anti-extrusion elements that contain the flow of the compliant element. The seal assembly also includes a sealing ring and a locking ring coupled to the sealing ring. The seal assembly also includes an energizing ring configured to be moved axially in a first direction by a ring tool to apply an axial force to the locking ring, which in turn acts on the sealing ring to radially deform the sealing ring into sealing engagement with the annular members. Continued axial movement of the locking ring in the first direction radially deforms the locking ring into locking engagement with the annular members.

Abstract: The seal member includes a tetrafluoroethylene-propylene copolymer (FEPM) and carbon nanofibers. The seal member has a number of cycles to fracture of 10 or more when subjected to a tension fatigue test at a temperature of 150° C., a maximum tensile stress of 2 N/mm, and a frequency of 1 Hz. The seal member exhibits excellent heat resistance and abrasion resistance.

Abstract: An S-seal for sealing an annulus between and mandrel outer surface and a tube inner surface. In one embodiment, the S-seal includes a ring comprising a seal face, a gland face, opposing side faces. The gland face is opposite the seal face. The side faces extend between the seal face and the gland face. A spring is embedded in the ring at an intersection of each side face with the seal face. Each side face comprises a groove disposed between the spring and an intersection of the gland face and the side face.

Abstract: A seal assembly for sealing an annulus between inner and outer wellhead members comprises an energizer ring having inner and outer legs separated by a slot, formed of a high strength elastic material and having a central axis and an inner diameter seal ring formed of an inelastic material located on an inner side of the inner leg for creating a seal between the inner wellhead member the energizer. An outer diameter seal ring formed of an inelastic material is located on an outer side of the outer leg for creating a seal between the energizer and the outer wellhead member. The seal assembly may have an initial radial dimension from inner surface of the inner diameter seal ring to an outer surface of the outer diameter seal ring that is adapted to be greater than a radial width of the annulus, causing the legs to deflect towards each other when inserted in the annulus.

Abstract: A wellhead seal assembly that forms a metal-to-metal seal between inner and outer wellhead members. A metal seal ring has inner and outer walls separated by a slot. The exterior surfaces of the outer and inner walls contain a soft metal inlay. A wicker profile with a slick area is located on the outer surface of the inner wellhead member and on the inner surface of the outer wellhead member. An energizing ring is moved into the slot to force the outer and inner walls of the seal into sealing engagement with the inner and outer wellhead members. The soft metal inlays deform onto the slick area on the wellhead members. The wickers on the wellhead members embed into the walls of the seal ring.

Abstract: A tubular is an expandable compliant anchoring and sealing tubular. In one embodiment, the expandable complaint anchoring and sealing tubular is located on a cladding string, a liner hanger, a packer or a bridge plug. The expandable compliant anchoring and sealing tubular has grooves and protrusions both on external and internal surfaces of the tubular with external protrusions positioned against internal grooves and internal protrusions against external grooves in a radial direction. Upon radial expansion of the expandable compliant anchoring and sealing tubular, the external protrusions may be disposed in high interference contact with the surrounding casing or wellbore providing an anchoring and sealing relationship. This tubular configuration may be used when precise internal diameter of the surrounding casing or wellbore is unknown. The expandable compliant anchoring and sealing tubular may provide dimensional adjustability by bending of the groove spans in a radial direction.

Abstract: An adjustable casing sub having an outer housing, an inner housing insertable into the outer housing, and a ratcheting system for coupling the inner housing within the outer housing. An annulus is between a portion of the inner and outer housing, the annulus including an inwardly tapered section. A metal faced seal is disposed in the annulus, wherein the metal faced seal includes a sliding surface and a compressive sealing surface. The sliding surface may include a malleable inlay and the compressive sealing surface may include a spring like element. Moreover, the metal faced seal radial thickness is greater than the inwardly tapered section radial thickness.

Abstract: A wellhead seal assembly that forms a metal-to-metal seal between inner and outer wellhead members. A metal seal ring has inner and outer walls separated by a slot. An elastomeric seal is located below the seal ring and has a bottom portion that contacts an upward facing shoulder of a hanger. An energizing ring with a tapered nose is moved into the slot. The tapered nose has a compound angle that determines how much the nose travels into the slot when a force is applied to the energizing ring. Once the elastomeric seal is compressed to a desired level, the load on the energizing ring has increased to the point that the tapered nose of the energizing ring will further enters the slot and force the outer and inner walls of the metal seal into sealing engagement with the inner and outer wellhead members.

Abstract: A seal assembly between a wellhead housing having a bore and a casing hanger, has an inner seal leg for sealing against hanger and an outer seal leg for sealing against housing. An extension extends downward from outer seal leg and is connected to a nose ring having a downward facing shoulder that rests on the hanger shoulder to provide a reaction point for setting operations. A lock ring is retained within interior portion of the nose ring. An upward facing shoulder formed on an upper portion of nose ring contacts the lower surface of the inner seal leg. The shoulder prevents the downward deflection of the inner leg and eliminates buckling due to Poisson effect from the resulting axial force due to growth of the seal legs during setting operations. The shoulder thus prevents crooked or twisted setting of the seal to prevent plastic strain in the seal.

Abstract: A seal assembly, method for sealing a seal assembly and a modular seal unit for a rotating control device for use in an offshore environment. The modular seal unit includes a first outer housing, a first seal housing lockable within the first outer housing, and a first sealing element disposed on a lower end of the first seal housing. The first sealing element includes a throughbore configured to receive a drill pipe, and a sealing surface configured to seal against the drill pipe. The modular seal unit also includes a first connector configured to couple the first seal housing to the first outer housing, and a second connector configured to couple the first seal housing to one selected from a second outer housing of a second modular seal unit or a running tool adapter.

Abstract: A wellhead seal assembly that forms a metal-to-metal seal between inner and outer wellhead members. A metal seal ring has inner and outer legs that are threaded to each other and separated by a slot and provide bi-directional sealing. The threaded connection provides a pathway for annular pressure into the slot. The inner and outer legs have inner and outer walls, respectively Inner and outer legs have a soft metal inlay on their interior surfaces. Wickers may be located on the outer surface of the inner wellhead member and on the inner surface of the outer wellhead member. An energizing ring is moved into the slot to force the outer and inner walls of the seal into sealing engagement with the inner and outer wellhead members. The soft metal inlays deform onto the energizing ring. If present, wickers on the wellhead members embed into the walls of the seal ring.

Abstract: A wellhead assembly having a wellhead housing, a casing hanger set within the wellhead housing, and sealing areas provided on opposing surfaces of the wellhead housing and casing hanger. The sealing areas circumscribe an axis of the wellhead assembly along respective axial distances on the wellhead housing and casing hanger. A seal is included with the wellhead assembly that has inner and outer legs that respectively engage the sealing areas and form sealing surfaces against the sealing areas. The axial distances of the sealing areas exceeds the length of the inner and outer legs, so that an original seal can be removed and replaced by a secondary seal, wherein the secondary seal engages sealing areas different from the sealing areas engaged by the original seal.