A downhole seal element (10) comprises a cup portion (11) formed of or including a resiliently deformable material. The cup portion (11) extends between on the one hand a nose part (12) comprising an annulus intended for sealingly mounting the seal element on a mandrel (22) and on the other hand a skirt (13), the seal element flaring in shape between the nose part (12) and the skirt (13). The skirt includes extending therefrom away from the nose part (12) a plurality of elongate, flexible limbs (18) that are spaced at intervals about the skirt (13).

A hydraulic oscillation tool with variable stage, small pressure drop and strong impact based on radio frequency identification is provided. It includes a conversion connector, a disc spring upper bracket, a disc spring housing, a disc spring group, a multi-stage piston shaft, an upper piston sleeve, a first radial sealing ring, a double-female-buckle piston sleeve, a double-male-buckle piston sleeve, a second radial sealing ring, a double-female-buckle lower piston sleeve, an end piston, an impacting connector, a power housing, a power shaft end cap, a high torque turbine, a power shaft, a lower connector, a rotating valve, a bearing supporting ring, and a turbine special bearing. The hydraulic oscillation tool realizes the low pressure drop and strong impact, and thus the problems that with the continuous increase of horizontal length, excessive pressure drop will make the annular pressure drop sharply, and drilling fluid circulation is difficult are solved.

A method of manufacturing a sealing component includes defining a configuration for the sealing component, wherein the configuration comprises a cross-section comprising a first wall and a second wall joined by a turning wall to form a generally U-shape, the first wall and the second wall comprising a variable cross-sectional thickness, wherein the cross-section is taken along a plane extending along an axial axis of the sealing component and the cross-section extends in a circumferential direction. The method also includes depositing a powder into a chamber, applying an energy source to the deposited powder, and consolidating the powder into a layer according to the defined configuration.

A resilient seal includes an annular body portion and a seating surface defined by the annular body portion and configured to interface with a seat of a subsurface safety valve. The resilient seal further includes a plurality of sealing surfaces defined by the annular body portion. Each sealing surface of the plurality of sealing surfaces is positioned to interface with a flapper of the subsurface safety valve in a closed position of the flapper of the subsurface safety valve. Additionally, the resilient seal includes at least one annular channel defined by the annular body portion between adjacent sealing surfaces of the plurality of sealing surfaces.

A flapper and seat assembly, and systems and methods utilizing such assembly, are disclosed. The flapper and seat assembly includes a tubular metallic seat having a bore therethrough. The tubular metallic seat is one solid unit. The flapper and seat assembly further includes a hinge coupled to the tubular metallic seat and a flapper. The flapper is pivotally mounted to the hinge such that it is rotatable between an open position and a closed position. The flapper and seat assembly also includes a secondary sealing element located between the flapper and the tubular metallic seat. The secondary sealing element is one of an undulating or curved lip seal. The flapper and seat assembly further includes a seal that is formed between a sealing surface of the flapper and a sealing surface of the tubular metallic seat. The seal comprises an angle measured from a plane perpendicular to the centerline of the flapper and seat assembly.

A seal assembly for sealing between an inner surface of a bore and an outer surface of a mandrel includes at least one annular seal including a channel disposed in an axial end thereof with a locking shoulder facing axially away from an opening end of the channel. The annular seal has an innermost diameter that is smaller than an outer diameter of the mandrel and has an outermost diameter that is larger than an inner diameter of the bore. An annular locking ring includes a locking member at a first axial end that is received in the channel of the at least one annular seal and having a ledge portion engaged with the locking shoulder of the annular seal. The ledge portion includes at least one slot extending axially there through.

A compact downhole tool, such as a frac plug, may include a single frustoconical member and a single set of slips. The slips may further include an internal button that engages with the frustoconical member. Various elements in the downhole tool may be dissolvable or degradable.

Embodiments described herein provide a multi-diameter thrust device that includes one or more thrust cups. Each thrust cup of the one or more thrust cups includes a first axial end hub disposed at a first axial end of the thrust cup; a second axial end hub disposed at a second axial end of the thrust cup; and a plurality of bowsprings. Each bowspring of the plurality of bowsprings includes a first axial end portion coupled to the first axial end hub and a second axial end portion coupled to the second axial end hub. The plurality of bowsprings are disposed circumferentially about a central axis of the multi-diameter thrust device.

Methods for forming a seal in a wellbore. An example method includes positioning an expandable metal sealing element in the wellbore; wherein the expandable metal sealing element comprises a composite material of expandable metal and a reinforcement material. The expandable metal forms a matrix and the reinforcement material is distributed within the matrix. The method further includes contacting the expandable metal sealing element with a fluid that reacts with the expandable metal to produce a reaction product having a volume greater than the expandable metal.

A wellhead assembly includes an outer tubular wellhead member and an inner tubular wellhead member with a seal pocket between them. A seal ring is located in the seal pocket. An annular energizing ring urges the seal ring into sealing engagement with the outer tubular wellhead member and the inner tubular wellhead member. A recess is located on an outer diameter of the annular energizing ring or a radially inner diameter of the seal ring, and a ratcheted retainer is on the other. A ratchet clip with a clip profile is located within the recess. The recess and the ratchet clip extend less than a full circumferential distance around the outer diameter of the annular energizing ring or the radially inner diameter of the seal ring. A retainer profile on the ratcheted retainer selectively engages with the clip profile of the ratchet clip.