SU1684476A1 - Device for unmaking downhole - Google Patents

Abstract

The invention relates to devices for unscrewing both right and left pipes, and can be applied both in production and in drilling wells. The aim of the invention is to increase the efficiency of the device by increasing the torque on its output shaft. For this purpose, the device comprising a housing with a master, driven shafts and a satellite contains an additional satellite and roller bearings located above and below the satellites in the driving and driven shafts . The drive and driven shafts are mounted in the housing with the possibility of rotation and limited axial movement, and the roller bearings are made in the form of nipples mounted for rotation in the drive and driven shafts, and the couplings rigidly connected to each other and forming tightly closed nipples in the closed position compound. When an axial load is transferred to the device to connect it to the swing-off pipes, the nipples and sleeves of the roller bearings close and lock the drive and driven shafts relative to the housing. After being connected to the rotatable piping, tension is applied and the rotation is transmitted to the device, and the pipes are folded. Tooth cuts are made on the inner surface of the drive and driven shafts, the satellites form a toothed gear between them, and each of them is with one of the shafts. This embodiment allows the device to be used for turning the pipes of both the right and left directions of the thread by turning the device 180 °. beat sl с о 00 fc 4 О

Description

The invention relates to devices for unscrewing both right and left pipes, and can be applied both in production and drilling wells.

The aim of the invention is to increase the efficiency of the device by increasing the torque on its output shaft.

Figure 1 shows the device section; figure 2 - section aa in figure 1; on fig.Z section bb in fig. one; figure 4 - section bb In figure 1; Figure 5 shows a roller bearing clutch, isometric projection.

The device comprises a hollow drive shaft 1 with a connecting thread in the upper part with washing holes a, a housing 2 with a supporting sleeve 2, a main 3 and an additional 4 satellites, which are installed in steps and are in engagement with each other, a hollow driven shaft 5 s

connecting thread in the lower part under the loam unit. The satellites 3 and 4 are located eccentrically relative to the longitudinal axis of the housing and are mounted e to the supporting sleeve 2 so as to be rotatable. The driving 1 and driven 5 shafts are made respectively with internal toothed cuts 6 and 7 to ensure the transmission of rotation. The satellites 3 and 4 are parallel to each other and are respectively engaged with the drive shaft 1 and the driven shaft 5. The satellites 3 and 4 are held in the housing by means of detachable top and bottom sleeves 8. which are rigidly interconnected (not shown). In the drive and driven shafts there are roller bearings located above and below the satellites. Each coupling 8 is made with a protrusion 9, which has a wedge groove 10. At the base of the wedge groove 10, teeth 11 are made. A nipple 12 with teeth 13 in the end part is located in the wedge groove 10 of the coupling 8, and the other end of the nipple 12 is pressed with a nut 14 bearing 15. Teeth 11 and 13 increase the coefficient of adhesion between the sleeves 8 and nipples 12 under compressive load, thereby eliminating the possibility of radial movement of the housing 2. The end of the nipple 12 is equipped with a ball 16, which is rotatably mounted, thus the nipples of roller bearings associated with the shafts with the possibility of rotation, the ball 16 is pressed by the strap 17 to the nipple 12, the drive shaft 1 and the driven shaft 5 are kept from downward displacement thanks the roller 1 supports. Leading 1 and driven 5 shafts are installed with the possibility of axial limited movement within the gap between the end face of the nipple 12 and the base of the wedge groove iO. Due to this connection, axial limited movement of the housing 2 relative to the driving 1 and driven 5 shafts is provided, within the gap the teeth of the couplings 8 and the teeth of the nipple 12, as well as the rotational movement of the shafts 1 ii 5 relative to the stationary housing 2 under axial loads,

The device for unscrewing the pipes, depending on the pressing tool used, operates as follows. The device is connected to the drill string with the upper end, and the fishing unit (left tap or bell) is attached to the lower end of the drill pipe and lowers into the well before the fishing unit comes in contact with the upper end of the fished emergency object. Then on the fishing unit the weight of the drill pipe is given a compressive load. In this case, the housing 2 moves downward relative to the driven shaft 5 within the gap between the elements of the roller bearings. The lower coupling 8 with its teeth 11 rests on the teeth 13 of the nipple 12. Simultaneously, the drive shaft 1 is lowered relative to the housing 2 within the gap between the elements of the roller bearing, where the teeth also interact with each other. Due to the large force and coupling coefficient 0 roller bearings, the housing 2 with the couplings 8 is fixed in a stationary position, this prevents rotation of the housing 2 relative to the driver 1 and the driven 5 shafts. After that, the drill pipe 5 is attached to the right-hand rotation. The drive shaft 1, rotating to the right by cutting 6, causes the satellite 3 to rotate to the right. Then, with the right rotation of the satellite 3, the satellite 4 will rotate to the left. Using cutting 7, the left-side rotation of the satellite 4 is communicated to the driven shaft 5, which as a result transmits the left-side torque to the tap or bell attached to it (see 5 Figures 2, 3 and 4). During left rotation of the tap or bell, the latter is connected to a stuck pipe string. At the end of the twisting of the tap or bell, a torque is transmitted to the emergency pipe to be caught, causing them to turn away. After that, the device together with the object zalivannogo removed to the surface.

When using a die at the time of fishing work, it is lowered into the well to the upper end of the emergency pipes, then the grab head is gradually put inside these pipes or covered. After that, the string of pipes is given tension. The drive shaft 1 j is moved upwards within the gap between the elements of the roller bearing. The upper and lower nipples 12 are wedged in the respective wedge grooves 10 of the sleeves 8. When this happens, braking of the body 5 2 occurs. After fixing the body 2, the right rotation of the drill string is reversed and the left rotation of the driven shaft 5 with the fishing unit. After unscrewing the emergency pipes, the device is raised to 0 surface

When it is necessary to unscrew the emergency stuck pipes with left-handed threading, the device rotates 180 °.

5 Such an embodiment of the device makes it possible to increase the reliability of its operation by significantly increasing the torque by increasing the diameter of the intermediate gears and their locations. In addition, due to the lack of communication housing

devices with well walls can be used in both cased and un-cased boreholes.

The advantage of the proposed device in comparison with the known ones is the possibility of using it for unscrewing pipes of both the right and left direction of the thread with the same device.

FORUMAWLAH AND ISLANDS

A device for unscrewing pipes in a borehole, including a hollow body with a support sleeve installed in the cavity, placed in the upper part of the case rotatably, a hollow drive shaft with a gear cut, located in the body support sleeve of an eccentric satellite axis, connected with its gear cutting a drive shaft and mounted in the lower part of the housing for rotationally a hollow driven shaft with internal gearing, connected in its lower part with a fishing unit, characterized in that, in order to increase The efficiency of the device by increasing the torque on its driven shaft, it is equipped with two

roller bearings and an additional satellite rotatably located in the body support sleeve eccentric to the axis of the latter and connected with its teeth with the teeth of the main satellite and teeth of the driven shaft, the gear shaft of the driving shaft being cut on its inner surface and the main satellite placed in its cavity , the drive and driven shafts are installed in the housing with the possibility of limited axial movement and are connected by means of roller bearings placed above and below the satellites, each of which One is made in the form of a coupling and installed in it with the possibility of rotation and limited axial movement of the nipple, connected with a free end with the possibility of rotation with the corresponding shaft, while the clutches of the roller supports of the free ends face each other and are rigidly connected to each other, On each end face of the clutch and the nipple of each roller support facing each other, teeth that respond to each other are made to form in the closed position the clutch and the nipple of a rigid connection.

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FIG. 2

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Claims (1)

Claim A device for turning pipes in a well, including a hollow body with a support sleeve installed in the cavity, rotatably mounted in the upper part of the body, a hollow drive shaft with gear cutting located in the support sleeve of the body eccentrically to its satellite axis, connected by its teeth to gear cutting the drive shaft and installed in the lower part of the housing with the possibility of rotation of the hollow driven shaft with internal gear cutting, connected in its lower part with the fishing unit, characterized in that, in order to increase the efficiency of the device by increasing the torque on its driven shaft, it is equipped with two roller bearings and an additional satellite located rotatably in the bearing sleeve of the housing eccentrically to the axis of the latter and connected by its teeth with the teeth of the main satellite and the teeth of the driven shaft, while the gear cutting of the drive shaft is made on its inner surface, and the main satellite is placed in its cavity, drive and driven shafts are installed in the housing with limited axial movement and are connected by means of roller bearings located above and below the satellites, each of which they are made in the form of a coupling and a nipple mounted in it with the possibility of rotation and limited axial movement, connected with the free end with the possibility of rotation with the corresponding shaft, while the coupling of the roller bearings with their free ends facing one another and rigidly connected to each other, facing one another the end surfaces of the coupling and the nipple of each of the roller bearings are made reciprocal teeth for the formation in the closed position of the coupling and nipple of a rigid connection. in ~ in FIG. 5 Compiled by I. Levkoyev Editor E. Sligan Tehred M. Morgenthal Corrector T. Paly Order 3492 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.