摘要:
Sealing elements have lubricating seal profiles for communicating fluid between the sealing elements and the sealed drill string tubular or other oilfield component while the sealed drill string tubular or other oilfield component rotates or moves vertically relative to the seal elements. The same fluid used for drilling may also be used for seal lubrication, such as water, drilling fluid or mud, well bore fluid or other liquid or gas. The sealing elements may be disposed with a seal housing, which may be positioned with a marine riser, or subsea without a marine riser. The seal housing may prevent rotation of the seal elements with the sealed drill string tubular or other oilfield component. Alternatively, the seal housing may be an RCD that allows the sealing elements to rotate. The lubricating seal profiles include a wave pattern, a saw-tooth high film pattern, a downwardly inclined passageway pattern, an upwardly inclined passageway pattern, and a combined upwardly and downwardly inclined passageway pattern. In one embodiment, a stripper rubber seal element may have a lubricating seal profile on the inwardly facing bore surfaces of both its nose and throat sections for sealing with drill string tubulars and other oilfield components having different diameters. Dual seals with two annular spaced apart sealing surfaces, with or without lubricating seal profiles, may seal with a drill string tubular or other oilfield component. In another embodiment, differential pressures across two seal elements may be managed by filling the cavity between the two sealing elements with cuttings-free drilling fluid, mud, water, coolant, lubricant or inert gas at desired amounts of pressure.
摘要:
Die Erfindung betrifft ein Verfahren und eine Bohranordnung zum verrohrten Bohren, bei dem in einem Boden zumindest in einem oberen Bereich eines zu erstellenden Bohrlochs ein Bohrrohr 12 eingebracht wird und ein Bodenmaterial innerhalb des Bohrrohrs 12 mittels eines drehend angetriebenen Bohrwerkzeugs entfernt und das Bohrloch abgebohrt wird. Gemäß der Erfindung ist vorgesehen, dass in einem oberen Bereich des Bohrrohres 12 in dem Bohrrohr ein Unterdruck mittels einer ringförmigen Unterdruckeinheit 20 erzeugt wird, wobei ein Bereich mit Unterdruck in dem Bohrrohr 12 gebildet wird, und dass der Unterdruck derart eingestellt wird, dass Umgebungsluft von oben ringförmig in den Unterdruckbereich einströmt.
摘要:
A drilling device is provided with improved fuel efficiency, reduced impact on the environment, and the like. Specifically, the drilling device (1) is brought into an idling state by maintaining the engine speed at a first speed while waiting for a drilling operation. Moreover, the engine speed is increased to a second speed that is higher than the first speed when any one of a rotation operation, a feeding operation, a rod exchange operation, or a boom operation is performed for a rock drill (4). Moreover, the engine speed is increased to a third speed that is higher than the second speed when a striking operation or a flushing operation is performed, and the engine speed is decreased from the third speed to the first speed after the striking operation and the flushing operation finish. The magnitude relationship between the speeds satisfies such that first speed
摘要:
The invention relates to a support and a method of collaring. The support (S) comprises a support element (SE) for supporting a drilling tool (9). The support element is inside a suction housing (15) of a rock drilling unit at least during drilling.
摘要:
The present invention relates to a collecting device (1) for solids material which is moved by means of a fluid from a first location on a seabed, on an offshore installation or on land to a second location, the fluid carrying the solids material in through an inlet portion (7) of the collecting device (1), the collecting device (1) being provided with one or more permeable portions arranged to retain the solids material exceeding a predetermined size. The invention also relates to a method of using the collecting device (1), the method including the abandoning of a filled collecting device (1).
摘要:
The invention relates to a device for dry drilling using drilling debris flushing and dust extraction, which is suitable for use in a drilling rig having one or especially also a plurality of drilling trucks, wherein each drilling truck having a dust extraction means and drilling debris collector (2') is assigned a vacuum generator (3) that is stable with regard to volume flow, especially in the form of rotary piston blowers (10, 11, 12), and a surface filter (4, 4', 4") having compact elements (5, 6) and serving as a dust filter (2) and drilling debris collector (2'). The surface filter (4) is designed in such a manner that said filter reliably separates both the drilling debris and the dust.
摘要:
A riserless mud recovery system including a mud return line secured by an anchor is disclosed. Some system embodiments for drilling a well bore in an offshore location having a water surface and a subsea formation include an offshore structure positioned on a platform at a water surface, a drill string for forming the well bore suspended from the offshore structure, a drilling fluid source on the platform for supplying drilling fluid through the drill string, a suction module for collecting the drilling fluid emerging from the well bore, a return pipe coupled to the suction module, a pump for receiving the drilling fluid from the suction module and pumping the drilling fluid through the return pipe to a location at the water surface, and an anchor for securing the return pipe, where the anchor is coupled to the return pipe and the subsea formation.
摘要:
Sleeve arrangement for a drill rig, especially adapted for damping sound and sealing to the ground, said drill rig comprising a feed beam (4) having a drill end (41) and a rear end (42), said feed beam (4) comprising a first and a second part (411, 412) near the drill end (41), the first part (411) being fixed in relation to the feed beam (4,) and the second part (412) being movable in relation to the feed beam (4) in a longitudinal direction. The invention is characterized in that said sleeve arrangement comprises a first flexible element (100) attached to the first part (411), and a second flexible element (200) attached to the movable second part (412), such that said first and second flexible elements (100, 200) are movable in relation to each other, wherein said second flexible element (200) is capable of taking an upper and a lower position, as well as all positions there between.