Abstract: A rasping shoe for non-rotational deployment of a casing string into a wellbore includes: a tubular body; and a nose mounted to an end of the tubular body. The nose includes: a base portion made from a drillable metal or alloy; a plurality of blades protruding from an outer surface of the base portion; a plurality of broaching cutters mounted to an outer surface of each blade at a rearward portion thereof; and a plurality of gouging cutters mounted to the outer surface of each blade at a forward portion thereof.

Abstract: A stop collar for mounting to a downhole tubular includes: a cylindrical housing having a threaded inner surface and a tapered inner surface; a compressible slip ring having teeth formed in an inner surface thereof and a pair of tapered outer surfaces; a cam ring having a tapered inner surface; a seal receivable in the housing; a cylindrical bolt having a threaded outer surface. A natural outer diameter of each ring is greater than a minor diameter of the threaded surfaces. Screwing the threaded surfaces of the housing and the bolt is operable to drive the tapered surfaces together and compress the seal, thereby compressing the slip ring such that the teeth engage a periphery of the tubular and energizing the seal into engagement with the periphery of the tubular.

Abstract: A float collar for assembly with a composite string of downhole tubulars includes: a tubular housing made from a composite material and having couplings formed at longitudinal ends thereof; a float valve disposed in a bore of the housing; a sheath connecting the float valve to the housing and sealing an interface between the float valve and the housing; and a guide operable to prevent side-tracking of a drill bit into the housing while drilling out the float valve and the sheath.

Abstract: A stop collar for mounting to a downhole tubular includes: a cylindrical housing having a threaded inner surface and a tapered inner surface; a compressible slip ring having teeth formed in an inner surface thereof and a pair of tapered outer surfaces; a cam ring having a tapered inner surface; a seal receivable in the housing; a cylindrical bolt having a threaded outer surface. A natural outer diameter of each ring is greater than a minor diameter of the threaded surfaces. Screwing the threaded surfaces of the housing and the bolt is operable to drive the tapered surfaces together and compress the seal, thereby compressing the slip ring such that the teeth engage a periphery of the tubular and energizing the seal into engagement with the periphery of the tubular.

Abstract: A rasping shoe for non-rotational deployment of a casing string into a wellbore includes: a tubular body; and a nose mounted to an end of the tubular body. The nose includes: a base portion made from a drillable metal or alloy; a plurality of blades protruding from an outer surface of the base portion; a plurality of broaching cutters mounted to an outer surface of each blade at a rearward portion thereof; and a plurality of gouging cutters mounted to the outer surface of each blade at a forward portion thereof.

Abstract: A float collar for assembly with a composite string of downhole tubulars includes: a tubular housing made from a composite material and having couplings formed at longitudinal ends thereof; a float valve disposed in a bore of the housing; a sheath connecting the float valve to the housing and sealing an interface between the float valve and the housing; and a guide operable to prevent side-tracking of a drill bit into the housing while drilling out the float valve and the sheath.

Abstract: A top latch-in plug includes a housing having a bore and a transitionable seal. The transitionable seal seals the bore of the housing when in a first configuration, and the transitionable seal unseals the bore when in a second configuration. The transitionable seal is triggerable to transition from the first configuration to the second configuration. A casing floatation system includes a casing having a pre-load collar and a landing collar; and a lower bottom latch-in plug. The lower bottom latch in plug includes a catch mechanism compatible with the pre-load collar; and a landing mechanism compatible with the landing collar.

Abstract: A top latch-in plug includes a housing having a bore; and a transitionable seal, wherein: the transitionable seal seals the bore of the housing when in a first configuration, the transitionable seal unseals the bore when in a second configuration, and the transitionable seal is triggerable to transition from the first configuration to the second configuration. A casing floatation system includes a casing having a pre-load collar and a landing collar; and a lower bottom latch-in plug comprising: a catch mechanism compatible with the pre-load collar; and a landing mechanism compatible with the landing collar.

Abstract: A top latch-in plug includes a housing having a bore and a transitionable seal. The transitionable seal seals the bore of the housing when in a first configuration, and the transitionable seal unseals the bore when in a second configuration. The transitionable seal is triggerable to transition from the first configuration to the second configuration. A casing floatation system includes a casing having a pre-load collar and a landing collar; and a lower bottom latch-in plug. The lower bottom latch in plug includes a catch mechanism compatible with the pre-load collar; and a landing mechanism compatible with the landing collar.

Abstract: A top latch-in plug includes a housing having a bore; and a transitionable seal, wherein: the transitionable seal seals the bore of the housing when in a first configuration, the transitionable seal unseals the bore when in a second configuration, and the transitionable seal is triggerable to transition from the first configuration to the second configuration. A casing floatation system includes a casing having a pre-load collar and a landing collar; and a lower bottom latch-in plug comprising: a catch mechanism compatible with the pre-load collar; and a landing mechanism compatible with the landing collar.