Abstract:
A downhole intelligent reamer controller detects the difference between rotary drilling and sliding drilling, responds appropriately and quickly to multiple changes between rotary drilling and sliding drilling that may occur several times each stand of pipe. Additional controls prevent deployment of reamer members at inappropriate times such as when drilling out cement, testing, and running in and out of the wellbore. In one embodiment, a separate modular control sub is disclosed that may be utilized with and/or removably secured to an expandable reamer and/or other types of downhole tools.
Abstract:
The invention relates to a device for conveying away drillings removed by a drilling tool (113) during the creation of a drill hole (101, 102) for laying a pipeline, said device having at least one pump (12) for pumping away a drilling liquid mixed with the drillings and at least one receiving body (11) with at least one receiving chamber (17), which is connected via openings (14) to a drillings region (117) behind the drilling tool (113). The problem addressed by the invention is therefore to create a device for conveying away drillings, with which it is possible reliably to transport away the drillings via a pressure conveying system. According to the solution of the invention, a receiving element (13) for mechanically receiving the drillings is provided on the receiving body (11), on which receiving element at least some of the openings (14) are arranged, via which the drillings reach the receiving chamber (17).
Abstract:
A downhole tool includes a body having a bore extending at least partially therethrough. A component is disposed within the bore and arranged and designed to move axially from a first position to a second position within the bore. An axial end portion of the component has a first contact surface that is oriented at an angle from about 1 to about 45 with respect to a longitudinal axis extending through the component.
Abstract:
A drilling equipment device (2') for use when reaming a pilot hole (13) in a rock formation (1), in which a drilling unit (2) comprises a rotatable drill-bit structure (15) fitted with roller cutters (12) which are arranged to break up the rock formation (1), the drill-bit structure (15) and an associated housing (16) being supported on a drill stem (21) which is connected in a rotationally rigid manner to a non-rotatable drill string (4). A method of reaming a pilot hole (13) in a rock formation (1) is described as well.
Abstract:
Various embodiments of an expandable downhole tool for use in drilling of a wellbore are disclosed. The expandable tools disclosed herein may be used as an underreamer to enlarge a borehole, or may be used to stabilize a drilling system in a previously underreamed borehole or in a borehole that is being underreamed while drilling progresses. The various embodiments of the expandable tools disclosed herein have a higher hydraulic capacity than prior art underreamers. An increase in hydraulic energy delivered to the cutting structures may advantageously improve the rate of removal of cuttings from the cutting structures (improved cuttings evacuation), may decrease cutter element wear, and may prevent damage or premature failure. Improved cuttings evacuation may also provide for improved cutting action and increased penetration rates.
Abstract:
A status indicator for determining a position of an extendable member in an expandable apparatus. The status indicator is configured to decrease a cross-sectional area of a portion of a fluid path extending through an expandable causing a pressure of a fluid within the fluid path to increase when an extendable member of the expandable apparatus is in an extended position. By determining the pressure of the fluid within the fluid path, one can determine the position of the status indicator within the fluid path and thereby determine whether the extendable member of the expandable apparatus is in the extended or a retracted position.
Abstract:
In an aspect, an apparatus for use in a wellbore includes a tubular and a drilling assembly configured to carry a drill bit at an end thereof, wherein the drilling assembly is configured to be positioned within the tubular, wherein the tubular and drilling assembly are configured to be run in the wellbore together. The apparatus also includes an actuation device in the tubular configured to selectively extend the drilling assembly from and retract the drilling assembly into the tubular.
Abstract:
A drill rod is disclosed. The drill rod includes a casing assembly defining a length that extends axially between a first end and an opposite second end of the drill rod, and a drive shaft rotatably mounted within the casing assembly. The drive shaft extends axially along the drill rod generally from the first end of the casing assembly to the second end of the casing assembly. The drill rod also includes latching pins at the first end of the drill rod and latching pin receivers at the second end of the drill rod. The drill rod further includes latches provided adjacent the latching pin receivers. The latches are movable between latching and non- latching positions. The latches move along an orientation of movement then the latches between the latching and non-latching positions. The drill rod also includes biasing structures that apply retention forces to the latches for retaining the latches in the non-latching position. The retention forces have at least components that extend in directions perpendicular to the orientation of movement of the latches.
Abstract:
An expandable apparatus for use in a borehole includes a tubular body having at least one opening extending between a longitudinal bore of the tubular body and an outer surface of the tubular body and at least one member positioned within the at least one opening of the tubular body. The member is configured to move between a retracted position and an extended position. An actuation structure is positioned within the tubular body. The actuation structure is coupled to the at least one member and is configured to move the at least one member from the retracted position to the extended position responsive to a flow rate of drilling fluid passing through the longitudinal bore.
Abstract:
Eine Vorrichtung zum Entfernen oder Auswechseln von Kabeln (8) oder zum Parallellegen von Kabeln oder Leitungen zu einem vorhandenen Kabel (8) im Boden, umfasst eine Vortriebsrakete (1), die in Längsrichtung in zwei Halbschalen (2, 3) geteilt ist. Diese können in einer Startgrube (21) auf ein durchgehendes, nicht unterbrochenes Kabel (8) aufgesetzt und zu einer Vortriebsrakete (1) verschraubt bzw. verbunden werden. Die Vortriebsrakete (1) weist stirnseitig einen ebenfalls mittig geteilten Kugelkopf (16, 17) auf, der einen aus zwei Teilen bestehenden Vortriebskopf (14, 15) trägt. Ein geschlitzter Schlauch (18) kann an der Vortriebsrakete (1) angeschlossen sein. Der Schlitz wird aufgespreizt und so der Schlauch (18) über das durchgehende Kabel (8) gestülpt. In der Startgrube (21) können Walzen (26) mit Fremdantrieb in einem Rahmengestell (27) durch eine Schubkraft auf den Schlauch (18) die Arbeit der Vortriebsrakete (1) unterstützen.