Abstract: A back-up ring system incudes an outer C-ring, an inner C-ring that mates with the outer C-ring, the inner C-ring including a first rupture port, and a ring sheath that fits onto the inner C-ring, the ring sheath including a cut-out region, and a second rupture point. The inner C-ring further includes a blocking segment that angularly offsets the first and second rupture points. The cut-out region of the ring sheath mates with the blocking segment of the inner C-ring. The ring sheath further incudes a ‘7’ shaped cross-sectional profile.

Abstract: A technique facilitates reducing or eliminating the risk of premature actuation of a liner hanger system and/or premature release of a miming tool. According to an embodiment, the technique utilizes a running string for deploying a liner hanger assembly having a liner hanger which may be actuated at a desired location to suspend a liner/casing from a surrounding casing string. An anti-preset module may be used in cooperation with the liner hanger to prevent premature actuation of the liner hanger. By way of example, the anti-preset module may use pressure equalization between a region within the miming string and a region between the miming string and the liner hanger to prevent pressure imbalances which could actuate the liner hanger. Additionally, a locking mechanism, e.g. releasable lock dogs, may be used to temporarily lock the liner hanger against premature actuation.

Abstract: A technique facilitates simplified cementing operations in a borehole with fewer trips downhole. The technique utilizes a cementing system having a stage cementing collar in combination with a cup tool. According to an embodiment, the stage cementing collar may comprise a collar body, a no-go connected to the collar body, and a port closure sleeve which serves as a valve positioned to close/open flow ports extending laterally through the collar body. The cup tool may be conveyed downhole on, for example, jointed pipe or coiled tubing, for engagement with the port closure sleeve. The cup tool is used to shift the port closure sleeve between operational positions, e.g. from a port open to a port closed position.

Abstract: The invention relates to high-speed electrical submersible pumps used for hydrocarbons production from oil wells with high concentration of solids. The technical result such as a longer service life is achieved with the technical design, wherein the pump comprises: a housing with a head and a base, a compression nut, a shaft installed on a journal bearing, stages of impellers and spacers installed on the shaft, set of diffusers installed on the housing, wherein the diffusers and impellers are manufactured from a ceramic material. The preferable design has metal spacers between the diffusers, wherein the length of the diffuser spacer between the contact surfaces equals the distance between the impeller spacers.

Abstract: A pump stage is disclosed for use with an electrical submersible pump. The stage includes an impeller and diffuser, each having a hub, blades and an outside ring. In such pump stage, the stage flow area is constructed from separate segments manufactured from wear resistant material. Furthermore, each separate segment is retained by the hub using an external compression fit ring.

Abstract: The invention relates to high-speed electrical submersible pumps used for hydrocarbons production from oil wells with high concentration of solids. The technical result such as a longer service life is achieved with the technical design, wherein the pump comprises: a housing with a head and a base, a compression nut, a shaft installed on a journal bearing, stages of impellers and spacers installed on the shaft, set of diffusers installed on the housing, wherein the diffusers and impellers are manufactured from a ceramic material. The preferable design has metal spacers between the diffusers, wherein the length of the diffuser spacer between the contact surfaces equals the distance between the impeller spacers.

Abstract: A pump stage is disclosed for use with an electrical submersible pump. The stage includes an impeller and diffuser, each having a hub, blades and an outside ring. In such pump stage, the stage flow area is constructed from separate segments manufactured from wear resistant material. Furthermore, each separate segment is retained by the hub using an external compression fit ring.

Abstract: In a broad aspect, the invention may include a nipple, a deflector, and a conveying tool. The nipple may include an upper sealing surface and a lower sealing surface. The nipple may also include a discriminator/muleshoe having an alignment profile and an alignment slot. A protuberance/bump may be disposed in the alignment slot. The deflector may include an upper seal and a lower seal adapted for engagement with the upper and lower sealing surfaces, respectively, on the nipple. When the upper and lower seals are engaged with the upper and lower sealing surfaces, fluid circulation is substantially restricted thereby resulting in a increase in pressure that is detectable at the earth's surface. This pressure increase provides a signal that the deflector is properly positioned in the nipple. The conveying tool may include a flexible arm having a latching finger that is releasably engageable with a latching profile in the deflector. The latching profile may be on an inclined, concave surface of a whipstock.

Abstract: In a broad aspect, the invention may include a nipple, a deflector, and a conveying tool. The nipple may include an upper sealing surface and a lower sealing surface. The nipple may also include a discriminator/muleshoe having an alignment profile and an alignment slot. A protuberance/bump may be disposed in the alignment slot. The deflector may include an upper seal and a lower seal adapted for engagement with the upper and lower sealing surfaces, respectively, on the nipple. When the upper and lower seals are engaged with the upper and lower sealing surfaces, fluid circulation is substantially restricted thereby resulting in a increase in pressure that is detectable at the earth's surface. This pressure increase provides a signal that the deflector is properly positioned in the nipple. The conveying tool may include a flexible arm having a latching finger that is releasably engageable with a latching profile in the deflector. The latching profile may be on an inclined, concave surface of a whipstock.