A helical strake for suppressing a vortex induced vibration (VIV) of a tubular. The helical strake having a shell dimensioned to at least partially encircle an underlying tubular, the shell having at least one fin opening; and at least one fin dimensioned to be positioned within the at least one fin opening formed by the shell, the at least one fin having a base portion dimensioned to be positioned along an underlying tubular and a tail portion dimensioned to extend through the at least one fin opening and radially outward from an underlying tubular.

An apparatus includes a sleeve a sleeve having a slot defined by at least a first edge and a second edge of the sleeve. At least a portion of the first edge defines a left-handed helical portion of the slot. At least a portion of the second edge defines a right-handed helical portion of the slot. The left-handed helical portion and the right-handed helical portion are at different axial positions along the sleeve with respect to a center axis through the sleeve.

An apparatus includes a sleeve a sleeve having a slot defined by at least a first edge and a second edge of the sleeve. At least a portion of the first edge defines a left-handed helical portion of the slot. At least a portion of the second edge defines a right-handed helical portion of the slot. The left-handed helical portion and the right-handed helical portion are at different axial positions along the sleeve with respect to a center axis through the sleeve.

The present invention describes a completion system for drilled wells having valves mechanisms, drives, sensors and devices able to promote an exploration of wells, safer, more efficient and, therefore, more economically viable. Specifically, the present invention comprises a system allowing the installation of smart completion in single or multiple producing zones, comprising valves mechanisms, drives, sensors, between other devices disclosed by the present invention. The present invention is in the fields of petroleum engineering and mechanic engineering.

The present invention describes a completion system for drilled wells having valves mechanisms, drives, sensors and devices able to promote an exploration of wells, safer, more efficient and, therefore, more economically viable. Specifically, the present invention comprises a system allowing the installation of smart completion in single or multiple producing zones, comprising valves mechanisms, drives, sensors, between other devices disclosed by the present invention. The present invention is in the fields of petroleum engineering and mechanic engineering.

A power tool is provided which accommodates interchangeable tool heads. The power tool includes: a tool body having a housing and an electric motor mounted within the housing, as well as a tool head that releasably attaches via a mechanical connection and an electrical connection to the tool body. The tool releasably connects to the output shaft of the electric motor when the tool head is attached to the tool body. A tool switch interposed between a power source for the electric motor and the electric motor is operable to supply power from the power source to the electric motor. A tool accessory switch interposed between the tool accessory and the power source for the electric motor is operable to supply power from the power source via the electrical connection to the tool accessory, thereby providing the tool operator independent control of the tool accessory.

A sealed pressured horizontal directional drilling continuous coring device for engineering geological investigation includes an outer tube assembly and an inner tube assembly matching the outer tube assembly. The outer tube assembly includes a single-wall drill pipe and a dual-wall drill pipe assembly. The inner wall of the dual-wall drill pipe assembly is sequentially provided with a bullet stop head, a bullet room, a suspended seat ring, a positioning inner lock, a positioning outer lock, a first centralizing ring, a lock ring seat and a drill from top to bottom. The inner tube assembly includes a spear head, a first sealing component, a bullet positioning mechanism, a recovery pipe, a second sealing component, an in-place reporting mechanism, a core blockage alarm mechanism, a single-action mechanism, a guiding mechanism, a buffer mechanism, an adjustment mechanism, a core tube and a core clamping mechanism.

A wellhead capable of steering fluid flow to minimize contact with equipment in the wellbore comprises a central bore and a plurality of side bores coupled to injection ports. The plurality of side bores comprise a rifled internal surface having a circular or helical configuration into which fluids can be injected. The side bores intersect with the central bore at a mixing chamber, which also comprises a rifled internal surface. By injecting fluids into the wellbore through these ports, the operator can create a vortex utilizing the full capacity of the wellhead while minimizing contact with any wireline equipment.

The invention relates to an auger arrangement and a method for forming an auger arrangement having a first drill part and a second drill part which are of tubular or bar-shaped design and in which at least one drill part is provided on its external side with an auger flight, wherein on at least one of their end regions the drill parts have matching connecting sections, wherein a first connecting section is designed as a sleeve-like female part with keyway elements and a second connecting section is designed as a mandrel-like male part with keyway elements, wherein male part and female part are plugged axially into each other to form a releasable, torque-proof connection. According to the invention provision is made in that on an internal wall of the female part an annular internal groove is applied, in that on an external wall of the male part an annular external groove is applied, in that in a plugged-together state of female part and male part the internal groove and the external groove lie opposite each other and form an annular space, on an external wall of the female part at least one introduction opening with a passage to the annular internal groove is designed and in that in order to form an axial securing a flexible steel cable is inserted via the introduction opening into the annular space and fills this out completely or to a large degree.

The invention relates to an auger arrangement and a method for forming an auger arrangement having a first drill part and a second drill part which are of tubular or bar-shaped design and in which at least one drill part is provided on its external side with an auger flight, wherein on at least one of their end regions the drill parts have matching connecting sections, wherein a first connecting section is designed as a sleeve-like female part with keyway elements and a second connecting section is designed as a mandrel-like male part with keyway elements, wherein male part and female part are plugged axially into each other to form a releasable, torque-proof connection. According to the invention provision is made in that on an internal wall of the female part an annular internal groove is applied, in that on an external wall of the male part an annular external groove is applied, in that in a plugged-together state of female part and male part the internal groove and the external groove lie opposite each other and form an annular space, on an external wall of the female part at least one introduction opening with a passage to the annular internal groove is designed and in that in order to form an axial securing a flexible steel cable is inserted via the introduction opening into the annular space and fills this out completely or to a large degree.