Device for protection of power cable in a well
 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. |
 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. |
 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. |
 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 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. |
 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. |
 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. |
 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: mining industry.
SUBSTANCE: 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.
EFFECT: simplified construction, higher manufacturability and reliability.
4 dwg
The invention relates to the field of mining, in particular to the oil and gas industry, and can be used to protect the power cable from mechanical damage during descent-ascent suspension tubing with the installation of electrical submersible pump in the well.
Known devices protect the power cable in the well, containing the appropriate split housings, fasteners and holes Rethimno key (2, 3).
The disadvantages of the known devices is the design complexity, difficulty in manufacturing, inconvenience during installation and dismantling.
Known protection device power cable in the well, comprising a housing and a groove to accommodate the power cable (1).
The disadvantages of the known devices are large shell base, the design complexity, low-tech, difficulty in manufacturing, inconvenience during installation and dismantling, unreliable in operation.
The objective of the invention is to reduce the element base structure of the device to protect the power cable in the borehole, to improve the processability during manufacture, the ease of use during installation and dismantling, to increase reliability and competitiveness.
The technical result is achieved in that the protection device power cable in a borehole containing a housing and a groove to accommodate the power cable, characterized in that the casing closed from an elastic material with thickening and inner tapered channel to communicate with the tapered threads of the tubing, and the groove is located on the outer surface of the body parallel to its axis in its thicker and has a T-shape, which corresponds to the section of the power cable, to accommodate the installation and capture the T-shaped groove mentioned power cable screwing in the borehole once the tubing with the clutch.
1 shows a protection device power cable during installation.
Figure 2 shows the device before screwing the tubing and couplings.
Figure 3 shows the protection device power cable in the well during the operation.
Figure 4 - cross section a-a figure 3.
Device to protect the power cable contains:
- closed housing 1,
- tapered channel 2,
- pump-compressor pipe 3.
- tapered thread 4 tubing 3,
- thickness portion 5 of the closed casing 1,
- T-shaped groove 6,
- power cable 7,
- the clutch 8,
- the seal 9,
operating the column 10.
In a static position the elements of the device protect the power cable in the borehole interact as follows.
Over the mouth of the hole before with what iniwanan regular tubing 3 and the clutch 8 closed casing 1 device protect the power cable, made of elastic material, compress and power cable 7 freely set in the extended T-shaped groove 6, is made in the thickened portion 5 of the housing 1 parallel to the axis of the housing (1).
After installation of the power cable 7 in T-shaped groove 6 a closed housing 1 is released from the compression force of and it takes the original form (before compression), while the T-shaped groove 6 captures the power cable 7 (figure 4).
Before screwing the tubing 3 it freely inserted into the sleeve 8 through the conical channel 2 of the closed casing 1 device protect the power cable in the borehole (figure 2).
In the process of screwing the tubing 3 to the sleeve 8 by the interaction of the conical channel 2 of the closed casing 1 and the conical thread 4 tubing 3 protection device power cable deforms and the cylindrical surface of the pipe is in a tapered channel 2 of the closed casing 1 (Fig 3).
In the process of screwing the tubing 3 and the clutch 8 power cable 7 through T-shaped groove 6 eliminates the twisting devices protect the power cable with respect to an axis of the suspension tubing, and after screwing the closed casing 1 is fixed on the cylindrical surface of the pipe.
In the dynamic position of the elements of the device protect the power cable is La in the well interact as follows.
In the process of running, lifting of the suspension tubing with electrical submersible pump and power cable in areas of curvature of the casing 10, especially in deviated or horizontal wells, there is friction between the inner diameter of the production string 10 and the thickened part 5 of the closed casing 1 device protect the power cable.
Therefore, power cable 7 laid in the T-shaped groove 6 when the descent-ascent tubing, protected from mechanical damage due to contact with the inner diameter of the production string 10 thickened part 5 protection devices power cable.
The presence of the coupling 8 sealing collars 9 (patent RU 2173764 C2 (2001) provides a reliable tightness of the suspension tubing during operation.
Proposed new technical solution devices protect the power cable from mechanical damage in the well differs from the known technical solutions novelty, easy to manufacture, convenient for installation and dismantling, reliable in operation, competitive, and its use in production will provide a positive technical and economic effect.
The level of technical solutions protection device power cable in the borehole has no analogues in Russian the Federation, and abroad.
Sources of information
1. RF patent №2120537 C1, CL E 21 17/10, 1998
2. U.S. patent No. 4042023 And class. E 21 17/10, 1977
3. U.S. patent No. 3893778 A, class F 16 L 58/00, 1975
4. GOST 633-80. Pipe tubing and couplings.
The protection device power cable in the well, comprising a housing and a groove to accommodate the power cable, characterized in that the casing closed from an elastic material with thickening and inner tapered channel to communicate with the tapered threads of the tubing, and the groove is located on the outer surface of the body parallel to its axis in its thicker and has a T-shape, which corresponds to the section of the power cable, to accommodate the installation and capture the T-shaped groove mentioned power cable screwing in the borehole once the tubing with the clutch.