Detachable protector for drilling pipe. RU patent 2244799.
 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. |
 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: oil and gas extractive industry.
SUBSTANCE: 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.
EFFECT: higher reliability, broader functional capabilities.
9 cl, 5 dwg
The invention is intended primarily for the protection of casing and drill pipe from wear and may find application in drilling, mainly rotary, oil and gas wells.
Known one-piece removable protectors for drill pipes, made in the form of a continuous sleeve of elastic material required for mounting on the pipe increases flow Diametric size which is made by application to the inner surface radial devices removed after completion of installation (1. Review of foreign literature. Bakulin V.M. “Cathodic protection of the pipe during the drilling of deep wells in the U.S.), VNIIEM, 1972, 2 on p.7, rise on p.55, Fig.28 on p.58. 2. GOST 6365-74 “rubber Rings for drill pipe. Technical conditions” and others). Their disadvantage is the complexity of the dismantling of the cavities, the limited lateral walls (for example, perpendicular to the pipe axis), excluding the possibility of input from the outside of the respective expanders between the bottom of the cavity and the inner surface of the sleeve.
Known detachable removable protector containing a split sleeve of elastic material and having clamps for attaching external puller pins (cross), established relative to the sleeve with the ability to transfer it from external pullers tangential (circumferential) the effort required for closing (opening) of the connector sleeve during installation (dismantling) of the tread (Review of foreign literature. Bakulin V.M. “Cathodic protection of the pipe during the drilling of deep wells in the U.S.), VNIIEM, 1972, 6 b,on p. 16). Its disadvantage is the presence of the connector and needed to lock the locking device, reducing the operational reliability of the tread and limiting technological possibilities of its use as a stabilizer or centralizer.
Object of the invention is improving the reliability and extending the technological capabilities of the tread.
This problem is solved due to the exclusion of the protector connector on the sleeve and a lock mechanism while maintaining the possibility of increase due to external pullers its diametrical bore size required, in particular, for the dismantling of the cavities, the limited lateral walls. The exception of the locking mechanism allows you to remove the restriction on the minimum level of circumferential tension in the sleeve necessary for its retention in the closed state, and, if necessary, to mount the protector on the pipe with the possibility of rotation that extends the technological possibilities of its use as a stabilizer or centralizer. Excluding connector and the possibility of reducing circumferential tensile stresses in the elastic sleeve allows to increase service life and reliability of the tread.
The invention consists in that the removable protector for drill pipe, the working body of which is made in the form of a sleeve of elastic material, additionally, there are circumferentially distributed in an amount of not less than three crossbars set with respect to the sleeve in such a way that their movement outward causes an increase in the internal bore diametral size of the tread, and having seizures, providing the ability to attach external pullers, creates the specified move.
To prevent relative movement of the sleeve and cross-beams, they can be provided with the relevant elements of mutual fixation.
The hooks on the crossbars to attach the puller can be performed within areas of their mutual axial overlap with the sleeve or on the areas of cross-beams projecting beyond its ends. In the first case in the sleeve are channels, providing connectivity grips with pullers.
In the particular case of cross-beams can be laid in is performed on the inner surface of the sleeve longitudinal grooves.
For mutual fixation on the cross member can be performed, at least one boss and the sleeve - corresponding radial hole. When assembling the boss is buried in the hole with some diametrical tension.
In this particular case, the capture can be made in the form of a threaded hole in the boss.
To prevent twisting of the tread in the process of drilling a cavity in the drill pipe under the fit may be provided with longitudinal grooves. In this case, the ends of the cross bars projecting beyond the ends of the sleeve have a size and shape enabling them to be installed in these slots when installing the protector. Thus the rotation of the sleeve prevents the fixation elements, such as walls of grooves or bosses.
In the particular case, to ensure mutual fixation of the sleeve and cross the latter may be molded into the body of the sleeve in its manufacture. It should be possible to connect grips with external pullers.
The drawings illustrate some special cases of the execution of a protector for the most adverse conditions, the disassembly of the completed on drill pipe cavity bounded perpendicular to its axis walls:
- figure 1 shows a longitudinal section of the tread, in which the sleeve has on its inner surface with four evenly distributed around the circumference of the groove, each of which is mounted a cross member having two lugs, equipped with a grip in the form of threaded holes,
- figure 2 shows a cross-section “a-a” protector, shown in figure 1,
- figure 3 shows a longitudinal section similar tread, of which the grippers are located on the protruding beyond the ends of the sleeve sections of the crossbars whose shape corresponds to the shape of the longitudinal grooves made on drill pipe and adjacent to the cavity for placement of the protector,
- figure 4 shows a cross-section “a-a” protector, shown in figure 3,
- figure 5 shows a type “B” protector, shown in figure 3.
Each 1...4 on polurazdeta located above the horizontal axis, the protector shown in the state after planting in the cavity on the drill pipe below the axis in the stretched under the influence of the efforts of the pullers state in position prior to installation in the cavity (similar to the situation after extraction of the specified cavity).
Protector (1,2) contains is made of elastic material continuous sleeve 5, having in original and working condition a cylindrical shape. On the inner surface of the sleeve is made of four evenly spaced around the circumference of the longitudinal groove, each of which has two spaced apart along the axis of radial holes 7 and 10, connecting the groove with the outer surface of the sleeve.
Each of the cross members 8 are in the form of a bar whose width corresponds to the width of the groove in the sleeve, having two lugs 6 and 9, the diameter and axial position which corresponds to the diameter and axial position of the radial holes 7 and 10 in the sleeve.
Each of the cross bars 8 having clamps for connection with external pullers 1 and 13, is made in the present case, each of her bosses 6 and 9 in the form of threaded holes.
Before mounting on the drill pipe 4 protector is collected, for what each of the crossbars 8 deepened with a slight interference fit in a corresponding groove, and her boss 6 and 9 in the respective radial holes 7 and 10 in the sleeve. The side surface of the cross member and the grooves and bosses 6 and 9 and radial holes 7 and 10 perform the role of elements of mutual fixation cross and sleeves, preventing the possibility of their relative movement after Assembly.
After Assembly of the protector external pullers 1 and 13 are passed through the respective channels in the sleeve, made in this case in the form of radial holes 7 and 10, and connect them with the grippers in the form of threaded holes in the bosses 6 and 9, located on the crossbars within their axial overlap with Bush.
Then in each of the pullers are making aimed outward radial force P, which through the grips and then through the cross-beams are passed to the sleeve 5, causing it to warp to form 2 and increasing internal lock protector size up to a diameter d 1 (figure 2, lower half section)in excess of the outer diameter D of the drill pipe 4 (Fig 1). After that, the protector, without disconnecting it from external pullers, move along the drill pipe 4 and is positioned relative to the cavity 12 for its placement, limited perpendicular to the axis of the walls 3 and 11 and a cylindrical bottom surface, having a diameter d (Fig 1, bottom half section). Then directed outward radial force P with the rods removed, resulting in a stretched them through the bars of the sleeve 2 under the influence of its elasticity returns to the form 5. The inner diameter of the tread decreases, and it sits in the cavity 12 (Fig 1, upper half section). After the rods 1 and 13 disconnect from the grips of the cross, and the pipe is installed in its cavity with protector pass to use.
The inner diameter of the protector in the free state and the diameter d of the cavity of the pipe can be selected so that after they install the protector were linked with diametrically tightness precluding rotation of the protector on the pipe, or with technological gap, providing its free rotation. In the latter case, the protector can act as a stabilizer or centralizer.
The removal of the protector from the cavity of the pipe is performed in the opposite order.
If necessary force to prevent rotation of the protector on the pipe ends 15 and 16 of the cross member can be removed from the sleeve 5 (Fig 3, 4) and take the form of allowing their installation mounting the protector on the drill pipe in the respective longitudinal grooves 14 and 17, made to last and adjacent to the cavity 12, and having the form shown, for example, in figure 5.
In the latter case, grips, for example, in the form of threaded holes can be made at the ends 15 and 16 of the crossbars that extend beyond the sleeve 5.
To increase the reliability of the mutual fixation cross member can be molded into the body of the sleeve with links grips with pullers.
To prevent damage to pipe columns or jamming of the bit crossbars or debris caught in the annulus and on the bottom in case of emergency destruction protector, cross bars can be made of razorivshegosya material, such as alloys of aluminum-based, such as AL 3, etc.
1. Removable protector for drill pipe, the working body of which is made in the form of a sleeve of elastic material, characterized in that the removable protector further comprises circumferentially distributed in an amount of not less than three crossbars set with respect to the sleeve in such a way that their movement outward causes an increase in the internal bore diametral size of the tread, and having seizures, providing the ability to attach external pullers, creates the specified move.
2. The protector according to claim 1, characterized in that the sleeve and the cross member is provided with elements of mutual fixation, preventing the possibility of their relative movement after Assembly.
3. The protector according to claim 1, characterized in that the grippers are located on the crossbars within areas of their mutual axial overlap with the sleeve, and at last made channels, providing the opportunity to connect with them pullers.
4. The protector according to claim 1, characterized in that the seizures are made on sections of the crossbars that extend beyond the sleeve.
5. The protector according to claim 1, characterized in that the cross is laid in is performed on the inner surface of the sleeve longitudinal grooves.
6. The protector according to claim 1, wherein each cross member has at least one lug, which is recessed in a radial hole of the sleeve communicates with its outer surface.
7. The protector according to claim 1, characterized in that the grip is made in the form of a threaded hole in the boss.
8. The protector according to claim 1, characterized in that the ends of the cross member protruding beyond the ends of the sleeve and have a form allowing their installation mounting the protector on the drill pipe in the respective longitudinal grooves of the cavity, is made to last.
9. The protector according to claim 1, characterized in that the cross member is molded into the body with the possibility of connecting grips with pullers.