Drill string rod centralizer
 Universal mechanical centralizing device / 2256768Centralizing device comprises body, spring-loaded centering members arranged in grooves and spaced equal distances one from another. The centering members form calibrating diameter of the device. Centering members are arranged in even or odd manner, concentrically or eccentrically one to another and installed in mating grooves directed at 4°-9° to body axis. The mating grooves converge towards device bottom. Stop nut for calibrating diameter regulation is located on outer body surface in top part thereof. Stop nut is joined with the body by left-handed connection thread and has longitudinal orifices extending along stop nut axis. U-shaped shear clips destined to prevent bottomhole assembly sticking are inserted in stop nut orifices. |
 Spherical centering turbulence promoter / 2255198Device has body in form of cylindrical bushing. Outside the body three blades are mounted symmetrically, with 120° spacing, relatively to central axis and being supports for device, providing for centering of drilling column. Blade is made of variable width with increase towards end portion, wherein rolling body in form of rubber ball is pressed. |
 Well drilling rig / 2254433Drilling rig includes drilling string located above reamer, borer with body and flushing channel. Centralizer is installed at a distance exceeding half-wave length drilling string flexure during drilling process. Centralizer is made as hinged spring-loaded blades with centering diameter corresponding to well diameter in transport position and to expanded borehole part diameter in working position. Reamer has eccentrically located rock cutting blades. Borer body is made as limiting step and is provided with stabilizing members secured to the body from side of rock-cutting blades. |
 Protector for well power cable / 2250977Protector has body of sections, made with possible mutual connection at a well. Body is made with possible mounting at an end of tubing pipes column sleeve. Sections have inner channels for interaction with tubing string, groove for driving power cable and are made with extension at outer surface. Lower section at an end is made with circular recess, and upper - with matching circular groove. Groove for driving power cable is made open in extension at an angle to body axis. In side walls of open groove, in parallel to body axis, inner grooves are made for holding power cable. |
 Protector for protection of force cable in a well / 2250345Device has body, groove for placing force cable and deflectors for interaction with operation columns inner channels. Body is made closed in form of eye, with thickened portion and channel for enveloping tubing pipe. In thickened portion a socket is made and groove is placed, made open for inserting at angle α to axis of force cable groove and its connection during screwing together of pipe and sleeve at well mouth. Width of open groove is less than force cable width. Surfaces of socket, enveloping force cable, are made with possible pressing of cable to surface of tubing pipe. |
 Protector for protection of power cable in a well / 2249668Device has body, made in form of bracket with inner dimensions for power cable and mounted on sleeve of tubing pipe through mounting rind. On ribs of body open grooves are made with side surfaces for interaction to lower end of sleeve. On the opposite side in open grooves holders are mounted for connection of protector body to mounting ring, passing through apertures of mounting ring for interaction with upper end of sleeve. Central channel in mounting ring is made with eccentricity and with size for outer diameter of tubing pipe for holding body of protector on sleeve. |
 Device for protection of power cable in a well / 2249667Device has body and groove for placement of power cable. Body is made closed, of elastic material with thickening and inner conical channel for interaction with conical thread of tubing pipe. Groove is placed on outer surface of body in parallel to its axis at its thickening and has T-like shape, which matches cross-section of power cable, for placement during mounting and holding by T-shaped groove of said power cable during its screwing together in well of next tubing pipe with sleeve. |
 Detachable protector for drilling pipe / 2244799Body of device is made in form of bushing of elastic material. Device additionally has transverse bars spaced along circle in amount no less than three, mounted in such a way relatively to bushing, that outward displacement thereof causes increase of inner passing diametric protector size, and having clamps providing for possible connection of external detachers to it, forming said displacement. Bushing and bars are provided with mutual fixing elements, preventing possibility of their relative displacement after assembling. Clamps are placed on bars within range of portions of their mutual axial overlapping with bushing, and in the latter channels are made, providing for possible connection of detachers thereto. Clamps are made on portions of bars, extending beyond bushing limits, bars are fixed in longitudinal grooves made on inner surface of bushing. Each bar has at least one boss, which is deepened into radial aperture of bushing, connecting to outer surface thereof. Clamp is made in form of threaded aperture in the boss. Bars ends extend beyond bushing ends and have shape providing for possible mounting thereof during mounting of device on drilling pipe in appropriate longitudinal grooves of hollow, made on the latter. Bars are pressed into body with possible connection of clamps to detachers. |
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Detachable protector for drilling pipe / 2244799 Body of device is made in form of bushing of elastic material. Device additionally has transverse bars spaced along circle in amount no less than three, mounted in such a way relatively to bushing, that outward displacement thereof causes increase of inner passing diametric protector size, and having clamps providing for possible connection of external detachers to it, forming said displacement. Bushing and bars are provided with mutual fixing elements, preventing possibility of their relative displacement after assembling. Clamps are placed on bars within range of portions of their mutual axial overlapping with bushing, and in the latter channels are made, providing for possible connection of detachers thereto. Clamps are made on portions of bars, extending beyond bushing limits, bars are fixed in longitudinal grooves made on inner surface of bushing. Each bar has at least one boss, which is deepened into radial aperture of bushing, connecting to outer surface thereof. Clamp is made in form of threaded aperture in the boss. Bars ends extend beyond bushing ends and have shape providing for possible mounting thereof during mounting of device on drilling pipe in appropriate longitudinal grooves of hollow, made on the latter. Bars are pressed into body with possible connection of clamps to detachers. |
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Device for protection of power cable in a well / 2249667 Device has body and groove for placement of power cable. Body is made closed, of elastic material with thickening and inner conical channel for interaction with conical thread of tubing pipe. Groove is placed on outer surface of body in parallel to its axis at its thickening and has T-like shape, which matches cross-section of power cable, for placement during mounting and holding by T-shaped groove of said power cable during its screwing together in well of next tubing pipe with sleeve. |
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Protector for protection of power cable in a well / 2249668 Device has body, made in form of bracket with inner dimensions for power cable and mounted on sleeve of tubing pipe through mounting rind. On ribs of body open grooves are made with side surfaces for interaction to lower end of sleeve. On the opposite side in open grooves holders are mounted for connection of protector body to mounting ring, passing through apertures of mounting ring for interaction with upper end of sleeve. Central channel in mounting ring is made with eccentricity and with size for outer diameter of tubing pipe for holding body of protector on sleeve. |
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Protector for protection of force cable in a well / 2250345 Device has body, groove for placing force cable and deflectors for interaction with operation columns inner channels. Body is made closed in form of eye, with thickened portion and channel for enveloping tubing pipe. In thickened portion a socket is made and groove is placed, made open for inserting at angle α to axis of force cable groove and its connection during screwing together of pipe and sleeve at well mouth. Width of open groove is less than force cable width. Surfaces of socket, enveloping force cable, are made with possible pressing of cable to surface of tubing pipe. |
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Protector for well power cable / 2250977 Protector has body of sections, made with possible mutual connection at a well. Body is made with possible mounting at an end of tubing pipes column sleeve. Sections have inner channels for interaction with tubing string, groove for driving power cable and are made with extension at outer surface. Lower section at an end is made with circular recess, and upper - with matching circular groove. Groove for driving power cable is made open in extension at an angle to body axis. In side walls of open groove, in parallel to body axis, inner grooves are made for holding power cable. |
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Well drilling rig / 2254433 Drilling rig includes drilling string located above reamer, borer with body and flushing channel. Centralizer is installed at a distance exceeding half-wave length drilling string flexure during drilling process. Centralizer is made as hinged spring-loaded blades with centering diameter corresponding to well diameter in transport position and to expanded borehole part diameter in working position. Reamer has eccentrically located rock cutting blades. Borer body is made as limiting step and is provided with stabilizing members secured to the body from side of rock-cutting blades. |
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Spherical centering turbulence promoter / 2255198 Device has body in form of cylindrical bushing. Outside the body three blades are mounted symmetrically, with 120° spacing, relatively to central axis and being supports for device, providing for centering of drilling column. Blade is made of variable width with increase towards end portion, wherein rolling body in form of rubber ball is pressed. |
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Universal mechanical centralizing device / 2256768 Centralizing device comprises body, spring-loaded centering members arranged in grooves and spaced equal distances one from another. The centering members form calibrating diameter of the device. Centering members are arranged in even or odd manner, concentrically or eccentrically one to another and installed in mating grooves directed at 4°-9° to body axis. The mating grooves converge towards device bottom. Stop nut for calibrating diameter regulation is located on outer body surface in top part thereof. Stop nut is joined with the body by left-handed connection thread and has longitudinal orifices extending along stop nut axis. U-shaped shear clips destined to prevent bottomhole assembly sticking are inserted in stop nut orifices. |
 Drill string rod centralizer / 2260107Centralizer has rod, pivotally connected casing halves with supports and retainer adapted to fix casing halves. Casing halves are provided with flat projections. Outer faces of the projections have additional rectangular extensions. Centralizer is provided with two additional casing halves with supports, slots and grooves having characteristics corresponding to that of pivotally connected case halve projections and located transversely to jointing plane. Circumferences and diameters of the supports of pivotally connected and additional casing halves are mutually aligned. Retainers are arranged in supports of additional casing halves, retainer ends are located in pivotally connected casing halves. |
 Centralizer for casing pipe / 2260667Centralizer comprises locating member, support members and axes with friction reducing rollers arranged on the axes. Locating member is made as two locating rings. Support members are formed as resilient bars with ends connected to location rings. Resilient bars define boxes in cross-sections of medium parts thereof. Bottoms of the boxes have at least two slots to expose rollers. Roller axes are installed in orifices formed in box sides. Gap is formed between sides of resilient bar boxes and pipe to which centralizer is connected when centralizer is in unloading state. |
FIELD: boring equipment, particularly for drilling directional wells.
SUBSTANCE: centralizer has rod, pivotally connected casing halves with supports and retainer adapted to fix casing halves. Casing halves are provided with flat projections. Outer faces of the projections have additional rectangular extensions. Centralizer is provided with two additional casing halves with supports, slots and grooves having characteristics corresponding to that of pivotally connected case halve projections and located transversely to jointing plane. Circumferences and diameters of the supports of pivotally connected and additional casing halves are mutually aligned. Retainers are arranged in supports of additional casing halves, retainer ends are located in pivotally connected casing halves.
EFFECT: increased reliability of centralizer operation and service life thereof.
3 dwg
The invention relates to a drilling technique and can be used when drilling directional wells.
Known centralizer (see Vmesa "layout of the bottom of the drill string", M, 1972, p.64-65, Fig. 21 g), includes a Central shaft with a bearing in the form of rings located in grooves of the Central trunk, and the lantern consisting of a sleeve, limiters and clips, which use finger, washer and cotter pin installed cavity of rubber-metal core. A disadvantage of this device is the design complexity and high cost of time for the installation of the centralizer, because the installation of the centralizer shall be made at rassledovanie rods and drilling becoming rods need to support using additional devices.
Closest to the proposed technical solution is guiding device for drill rods (autospecs No. 825909), including the hinge of the United polumbaum installed in the groove of the rod, provided with supports and apparent from the disclosure a latch that is located in the eyes of polumbaum.
A disadvantage of this device is the rapid destruction of the bearings and the fixing unit of polumbaum action on them in the process of drilling from the side of the rod considerable axial, radial loads and load torque transmitted from the in the usausausa rod.
Unified technical result is to increase the reliability of the centralizer and its durability. Unified technical result is achieved by the fact that known centralizer rod drill rod comprising a rod pivotally connected polumbaum with supports and lock polumbaum, fitted with swivel United polumbaum flat shoulders, the outer plane which have an additional rectangular protrusions, as well as two additional paleobotany with supports and located perpendicular to the plane of their parting grooves and grooves, with the parameters corresponding to parameters of the projections articulated the United polumbaum, with support pivotally United and additional polumbaum combined circumference and diameter, and the latches are placed in the supports additional polumbaum and their ends are hinge supports of the United polumbaum.
The device of the centralizer rod drill rod is illustrated by drawings, showing the section in the axial plane (figure 1), the section in the radial plane (figure 2) and side view (Fig 3).
The centralizer consists of drill rod 1 (smfh), annular groove which is placed lower polumbaum 2, 3, hinge-connected to each other axis 4 (smig) and an additional upper polumbaum 5 (smpeg)fixed relative to the hinge connecting the floor of the Boim clamps 6. The upper ends of the latches are located in the cylindrical holes formed in the supports (ribs) 7 (smpeg) additional polumbaum 5 (smig) and preloaded by springs 8. Holes on one side have a reduced diameter, and on the other hand closed threaded plugs 9. The lower ends of the latches 6 are holes formed in the supports (ribs) 10 (smpeg) bottom hinge of the United polumbaum 2,3 (smfg).
Pivotally connected polumbaum 2, 3 have a flat ledges 11 (smpeg, 3), parallel to the plane of their connector, the outer surfaces of which have an additional rectangular protrusions 12, and additional polumbaum 5 (smpeg) is made perpendicular to the plane of their corresponding connector on the size of the slots and grooves.
The rod 1 has a radial kalibrovaniya holes 13, which connects the internal cavity with an annular groove 14 made on the inner cylindrical surfaces of polumbaum.
For securing the centering rod rods within the depths of drilled wells used set of centralizers of different diameters on the supports with a step corresponding to the maximum loss of the diameter of the drilling tool during the flight.
Installation of the centralizer rod drill rod is as follows.
Well subuniverse and drilled to a depth until the stiffness of the rod, both of which ensures the preservation of a given direction of drilling. Then the machine is a rod 1 of the centralizer, and supplied to the side of the face to the exit of the annular grooves NC lunette or gearbox of the machine. Select the centralizer, the diameter of which supports sootwetstwuet possible loss of the diameter of the set of drilling tools for the flight (before replacement). In an annular groove of the rod are lower hinge connected polumbaum 2, 3, utomlyayutsya clamps 6 in polumbaum 5 and is input polumbaum in an annular groove coverage of the projections 11, 12 (smpeg) bottom hinge of the United polumbaum. When this occurs, the combination of supports (ribs) 7 and 10 pivotally United and additional polumbaum circumference and diameter, and disclosure and loss of polumbaum from the annular groove prevents the axis 4 (smfh), the tabs 6 and locking their connection lugs 11 and 12 (smfg).
The work clamp is as follows. The centralizer is introduced into the well, turn on the rotation rod rods and continues drilling.
As uglubki wells support (ribs) 7 and 10 (smpeg, 3) polumbaum slide on the borehole wall in the axial direction, and the rod 1 (smpeg) rotates in polumbaum and its axis coincides with the axis of the borehole. The reduction of friction and the wear rate of the friction surfaces is provided by the entry of air-oil-water mixture from int is nna cavity of the rod through the holes 13 and groove 14. Because in the process of the centralizer at the same time he can build no more than three supports (ribs), and each bearing (edge) element includes upper and lower polumbaum, then load from the rotating rod for fixation of polumbaum reduced, thereby increasing the reliability of the centralizer.
Disassembly of the centralizer as follows. The centralizer is extracted from the well. Special dvuhtokovoe plug, is inserted through the adjacent holes on the bottom hinge of the United polumbaum 2, 3, the tabs 6 are moved to the top additional fixing half-clamp 5 and it is extracted from the ring groove of the rod 1. Similarly extracted second additional fixing half-clamp 5. Then removed the lower hinge connected polumbaum 2, 3. The rod 1 is passed through the lunette and the cartridge and removed from the machine.
The application of the proposed centralizer rod rods compared to the prototype will allow to increase the efficiency of drilling wells by increasing its reliability and durability.
The centralizer rod drill rod comprising a rod pivotally connected polumbaum with supports and lock polumbaum, characterized in that the hinge connected polumbaum equipped with flat shoulders, the outer plane which have an additional rectangular protrusions, and also has the two additional paleobotany with supports and located perpendicular to the plane of their parting grooves and grooves with parameters the relevant parameters of the hinge protrusions of the United polumbaum, with support pivotally United and additional polumbaum combined circumference and diameter, and the latches are placed in the supports additional polumbaum and their ends are hinge supports of the United polumbaum.