Universal mechanical centralizing device
 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. |
 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. |
 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: oil and gas well drilling, particularly support-and-centralizing devices for bottomhole assembly to perform directionless path control and well wall calibration.
SUBSTANCE: 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.
EFFECT: increased efficiency of bottomhole assembly operation, possibility of rapid changing the main bottomhole assembly parameters, extended range of application due to solution of some technical problems, possibility of device usage for underbalanced drilling.
2 cl, 3 dwg
The invention relates to techniques for drilling oil and gas wells, in particular to the reference-centering device configurations of a bottom hole Assembly (BHA) for misorientations trajectory management and calibration of the borehole wall.
Known centralizer drilling tool (A.S. No. 2001237, MKI E 21 17/10, BI No. 37-38, 1993), includes a hollow cylindrical body placed on it disjoining cone, centering elements and the site of their drive containing the ring hydroporinae plunger.
For reasons that impede the achievement of specified following technical result when using the known structure of the centralizer of the drilling tool, is that it belongs to the group of hydraulic centralizers, characterized by a high complexity of manufacturing, Assembly and adjustment of the design and, as a result, reduced reliability in the borehole, and the need for conservation after work. When this is known the centralizer of the drilling tool does not provide the possibility of rapid regulation of outer diameter to provide misorientations control the trajectory of the wellbore, for example, for land stabilization, natural set or decline Zenith angle.
In addition, when changing the parameters of drilling fluid by deeper wells require su is the natural enemy reconfiguration and rearrangement of the structure as a whole, especially when underbalanced drilling, i.e. the design is not generic.
The closest device to the same destination to the claimed invention on the totality of symptoms is the centralizer of the drilling tool (A.S. No. 1222813 And MCI E 21 17/10, BI No. 13, 1986), which includes a housing mounted on it a sleeve, spring-loaded relative to the sleeve centering elements and guide rods, one ends of which are rigidly connected with the sleeve, and the other freely located in the hole of the centering elements is adopted for the prototype.
For reasons that impede the achievement of specified following technical result when using the known centralizer drilling tool, taken as a prototype, is the inability to regulate its outer diameter immediately before the descent into the well. In addition, its design does not provide the ability to prevent sticking in the hole because of clinicabarcelona over the centering elements, especially when using the centralizer in the layout of the bottom of the coiled tubing industry.
The invention consists in the following.
The proposed invention solves the technical problem, aimed at improving the effectiveness of BHA, particularly in the composition of the composition of the coiled tubing bottom of the complex, the possibility is porativnogo change the main settings of the BHA and versatility, associated with the solution of a number of technological challenges, and the ability to use in underbalanced drilling.
The technical result in the implementation of the claimed invention is to prevent sticking due to the formation of seals over the centering blades and facilitate lifting the drilling tool, which is especially important when the composition of the bottom of the coiled tubing industry. In addition, more accurate stepless adjustment of the outer diameter of the device immediately before the descent of the drilling tool in the well that provides the opportunity to use the device as a centralizer, calibrator, and stabilizer, and simultaneously to eliminate the need to drill a group of 5...15 musculo-centering elements of different diameters. Remove one or two centering elements enables operation mode eccentric nipple, reduces the intensity of the local curvature of the wellbore.
This technical result in the implementation of the present invention is achieved in that in the known centralizer mechanical universal, is included in the composition of the coiled tubing bottom of the complex, comprising a housing and located in the grooves with a uniform step spring-loaded centering elements, obrazowe the gage diameter of the device, according to the invention the spring-loaded centering elements posted by odd or even, concentric or eccentric in the second grooves, performed inclined to the body axis at an angle 4°...9°that tapers towards the bottom of the device, and on the outer surface of the shell in its upper part, has also thrust nut regulation calibrating the diameter of the device, articulated with the body of the left mounting thread and longitudinally relative to an axis of the holes, which are placed in the U-shaped shear bracket to ensure it is possible to prevent sticking of the composition of the coiled tubing bottom of the complex.
Spring-loaded centering elements are placed in the slots of the chassis at random, and the opportunity to not fill all the slots.
Step grooves of the case is made randomly.
In the study of the distinctive features of the proposed centralizer mechanical universal were no analogues characterized by signs, identical with all the essential features of the claimed invention, which ultimately leads to the above technical result and confirms the relevance of features in the claims.
The proposed invention is novel, because it is not detected analogues with a set of essential when Nakov, identical to the proposed invention provides the above technical result, which corresponds to the criterion "novelty".
Declared centralizer mechanical universal not apparent to the expert in the obvious way from the prior art, since the set of essential features of the claimed invention only in the proposed vzaimookonchaniy achieve the above technical result that meets the criterion of "inventive step".
Figure 1 shows the centralizer mechanical universal, partial incision. Figure 2 - centralizer mechanical universal mode eccentric nipple. Figure 3 - cross section a-a in figure 2. The centralizer mechanical universal includes a housing 1, a spring-loaded centering elements 2 with carbide teeth, thrust nut 3, a compression spring 4, U-shaped shear bracket 5. The housing 1 has on the outer surface of the longitudinal grooves 6 of dovetail”, performed inclined to the body axis at an angle 4°...9°that tapers towards the bottom of the device. Centering elements 2 have on their internal surfaces of the grooves 7 for accommodating the compression spring 4. To accommodate the U-shaped shear brackets 5 in the stop nut 3 are longitudinal with respect to its axis of the hole 8.
The device operates as about the time.
In the working position, the centralizer mechanical universal is set at the estimated location from the bit. Due to the rotation of the thrust nut 3 more precisely is continuously adjustable outer diameter of the device immediately before the descent of the drilling tool in the well. Moreover, the thrust nut 3 is threaded to avoid the possibility of increasing the working diameter from unscrewing when the rotary drilling method or increasing the moment of self-oscillations of the drill string. For the same purpose through the holes 8 it is inserted U-shaped shear bracket 5, which their free ends are clinging to the centering elements 2, Cretas with an estimated effort to prevent an emergency situation. When drilling centralizer mechanical universal rotates, calibrating the borehole wall due to the carbide inserts on the centering elements 2. Centering elements instead Zubkov may have carbide-tungsten welding. The regulation of the diameter designed to operate mechanical clamp universal as centralizer, calibrator, and stabilizer. The diameter of the device is changed due to the rotation of the thrust nut 3 to which the compression spring 4 is pressed centering elements 2. During the formation of the stuffing tube above the centralizer mechanical universal, centerus the e elements sink 2 in the housing 1, moving through the grooves 6 of dovetail” angled 4°...9° to the axis of the housing 1. This prevents sticking of the drilling tool and facilitated the rise of the tool, which is especially important when the composition of the coiled tubing bottom of the complex.
The centralizer mechanical universal has the option mode eccentric nipple by the location of the centering elements 2 concentric or eccentric, with an even or odd number of edges and removal of one of the centering element or several of them. This mode allows the column to rotate around the axis of the borehole, and not around its curved axis, reducing the intensity of the local curvature of the wellbore, which improves the stabilization of the Zenith angle of the hole.
With a large number of grooves of the housing, for example more than 6...8, you can install them in the spring centering elements as follows: if there is full information on the work of the BHA pattern is established in a known manner (this may be normal law, the law of the Weibull distribution etc); if there is insufficient information it is advisable to use a number of uniformly distributed random numbers, for example, from the table (table of mathematical statistics. Morethis L.N., Media is a new NV, M.: Nauka, 1983, C, table 7.1 (a) take the number of uniformly distributed random numbers: 1, 3, 6, 8, i.e. from the clamp removed the second, fourth, fifth, and seventh of the centering elements. This increases the reliability of the device when operating in the mode of influence of random oscillatory processes, which is typical for horizontal drilling and allows the centralizer mode eccentric nipples at random oscillatory processes.
The ability to control the outer diameter of the centralizer mechanical universal allows you to replace the claimed device for drilling a set of 5...15 musculo-centering structures.
The claimed invention is intended for use in drilling oil and gas wells, particularly the arrangement of the coiled tubing bottom of the complex, for misorientations control borehole trajectory and the calibration of the borehole wall. This design was developed technical project range for different diameters of drill bits and a number of spring-loaded centering elements.
The advantage of the invention compared with the prototype is that it allows you to quickly adjust the outer diameter, just before descending into the well to prevent sticking of the drilling tool from clinicabarcelona the hell centering elements, in particular the layout of the bottom of the coiled tubing complex to calibrate the borehole wall, to operate in an eccentric nipple.
Therefore, the claimed invention meets the criterion of “industrial applicability”.
1. The centralizer mechanical universal, is included in the composition of the coiled tubing bottom of the complex, comprising a housing located in the grooves with a uniform step spring-loaded centering elements forming calibrating the diameter of the device, characterized in that the spring-loaded centering elements posted by odd or even, concentric or eccentric in the second grooves, performed inclined to the body axis at an angle 4-9°that tapers towards the bottom of the device, and on the outer surface of the casing in the upper part are additional thrust nut regulation calibrating the diameter of the device, articulated with the body of the left mounting thread and longitudinally relative to an axis of the hole, which are U-shaped shear bracket to ensure it is possible to prevent sticking of the composition of the coiled tubing bottom of the complex.
2. The centralizer mechanical universal according to claim 1, characterized in that the spring-loaded centering elements are placed in the slots on the chassis with the possibility of not fill all the slots.