Abstract:
This invention relates to a housing having a shaft with a drill bit for tapping a pressurized fluid pipe. A saddle having a valve is attached to a pipe. A housing having a shaft passing therethrough is threaded to the valve. A drill bit is attached to one end of the shaft and a drill is connected to the other end of the shaft. The housing has a chamber in which the drill bit is retracted before connecting the housing to the valve. With the valve in the open position, the shaft is extended until the drill bit engages the pipe. The drill rotates the drill bit and cuts a hole in the pipe. The housing is sealed such that fluid entering the housing chamber does not escape along the shaft. The shaft and drill bit is then withdrawn into the housing chamber and the valve closed. The housing is then removed from the valve and a branch pipe connected thereto. The valve is then opened to fluidly connect a branch.
Abstract:
The apparatus enables a saddle-shaped parallel connection tapping to be installed on a pipe from the top of a hole in the ground. The apparatus comprises a frame having a tipping thrust device in the form of a spade controlled by rodding and designed to take up a position beneath the pipe, and a removable tapping positioner guided in the frame and including a tubular column that is split along one of its generator lines and that is fitted at its bottom end with a disconnectable module engaging the rims of the tapping. Means are provided on the frame to exert downwards pressure on the tapping support module in selective manner, and the removable module includes means for welding the tapping to the pipe. A device for driving a plug or a perforator device can be inserted in the cylindrical column of the tapping positioner from above.
Abstract:
A tapping assembly comprising a main valve for selectively opening and closing a valve passageway, a support for holding the main valve adjacent a unit to be tapped, a drill for piercing a wall of that unit with the drill including a housing and a cutting element. A coupler is provided with left-hand threads and right-hand threads for easily connecting and disconnecting the drill housing from the main valve, thereby allowing easy replacement of a drill bit. Vents are provided both upstream and downstream of the main valve for permitting controlled removal of the contents of the unit with the main valve closed and for permitting controlled removal of any contents of the unit from the coupler with the main valve closed.
Abstract:
A threaded hole may be formed in a lid of an underground petrol tank without emptying the tank or removing the lid, using a tool (FIG. 3) having a taper tap section (61), an intermediate tap section (62) and a final tap section (63). At the leading end of the tool, there is a reamer section (60) and supported on the free end of the tool is a centerless hole cutter (50). A resilient mounting transmits drive from the main part of the tool to the cutter (50), but allows the cutter to float. A sleeve (23) surrounds the tool, so that a column of inert gas may be caused to lie in the cutting region. A magnet (57) mounted within the cutter (50) catches and holds a released disk of the cover. Also described is a rig (FIG. 1), for operating the tool (FIG. 3), and a method (FIG. 5) of securing a collar threaded into a hole formed by the tool.
Abstract:
A tapping assembly comprising a main valve for selectively opening and closing a valve passageway, a support for holding the main valve adjacent a unit to be tapped, a drill for piercing a wall of that unit with the drill including a housing and a cutting element. A coupler is provided with left-hand threads and right-hand threads for easily connecting and disconnecting the drill housing from the main valve, thereby allowing easy replacement of a drill bit. Vents are provided both upstream and downstream of the main valve for permitting controlled removal of the contents of the unit with the main valve closed and for permitting controlled removal of any contents of the unit from the coupler with the main valve closed.
Abstract:
An apparatus of reinforcing a hollow underwater member of an offshore platform which includes removable power-actuated motors, retaining means for preventing rotational movement of the motors relative to the retaining means while permitting axial movement of the motors, a drill and tap operatively connected to and driven by the motors for forming at least one port through a side wall of the hollow underwater member, and means operatively engageable with the motors for controlling the axial movement of the drill and tap in at least one direction during a port-forming operation.
Abstract:
A set screw pocket drilling device for drilling blind holes in a pipe surface at a pipe joint for set screws holding the joint together including an externally threaded sleeve sized to fit the set screw hole and engage the surface of a pipe within a retainer in which the set screw hole is drilled, a drill fitting through and rotatable relative to the sleeve, and apparatus for rotating the drill relative to the sleeve. One embodiment of the device includes only a sleeve and a drill fitting through the sleeve having an outward end extending from the outward end of the sleeve for engagement of a wrench to rotate the drill and the sleeve. Another form of the device has a sleeve provided with a head having locking lugs, a drill extendable through the sleeve and having a head provided with a locking flange, and a clamping bracket for securing the sleeve head with the drill head at a position at which the cutting end of the drill is extended beyond the sleeve end so that a set screw pocket is drilled as the sleeve is screwed into a set screw hole of a pipe joint retainer. A third form of the device includes an externally threaded sleeve having a rotatable head and a drill provided with a cam coacting with the head to advance the drill as the head and cam are turned by means of a cam handle.
Abstract:
To tap a main pipe for connection of a branch pipe thereto, a tubular enclosure is applied to the main so that one end of the enclosure is formed by the main pipe side-wall to be holed. A drill is penetrated through the main pipe side-wall from the interior of the enclosure while being operated from outside the enclosure; the enclosure having its end remote from the main pipe filled by a removable plug which acts as a bearing for the drill-shaft. The enclosure is equipped with a closure member (such as that of a gate valve) which is used as a lock to prevent movement of the plug during drilling. After drilling, the means used to drive the drill are removed and replaced by an extension of the enclosure, the plug is then unlocked so that the plug and the drill retract into the extension under pressure of the main pipe's contents. The closure member is then operated to close the enclosure at a point between the retracted drill and the main pipe, and the tapping completed by removal of the plug, drill and extension from the enclosure.
Abstract:
A method for connecting a sewer pipe to a larger pipe or manhole wherein the connection between the pipe and manhole opening is sealed by means of an elastomeric gasket or boot. A rigid ring is inserted within one end of an elastomeric boot, which has an outer diameter slightly larger than the inner diameter of the opening in the manhole. The boot is inserted into the opening up to the enlarged end, a jacking device is inserted through the gasket, and a circular, stepped plate is connected to the end of the jacking device which has been inserted through the gasket so that it is positioned to engage the end of the gasket assembly having the ring inserted therein. The jacking device includes a spider element which is braced against the outer wall of the manhole, and the device is operated such that the plate is drawn toward the spider thereby pulling the gasket and ring into the opening wherein the gasket is compressed between the opening and the rigid ring so that a compressive water-tight seal is achieved. In the disclosed embodiment of the invention, the jacking device comprises a threaded rod secured to the plate at one end and threadedly connected to a nut at the other end, which is turned by means of a ratchet device so as to draw the rod, stepped plate and gasket assembly into the opening.
Abstract:
A tapping machine is herein disclosed. The tapping machine includes a base. A frame is connected to the base. A movable drive assembly is movably connected to the frame. A cutter is connected drivingly to the movable drive assembly. The base is adapted to engage a gate valve, or the like. In operation the drive assembly moves along the frame to bring the cutter through the gate valve into selective engagement with a pipe which is to be tapped.