SU1645453A1 - Head device for releasing sticking pipes - Google Patents

Abstract

Pochobre grepie refers to petroleum and gachopon prom-gti. The goal of the Ichorretenin is to ensure the effectiveness of the development of the primiered pipes, which shortens the time required for bringing the device into operation, while simplifying the design. Yach-h orn n enclosure I follow

Description

The invention relates to the oil and gas industry and can be used to free pipes stuck in wells.

The purpose of the invention is to increase the efficiency of freeing stuck pipes by reducing the time spent bringing the device to the working position while simplifying the design of the device.

Fig. 1 shows a wellhead for releasing stuck pipes, a slit; figure 2 - section aa in Fig, 1; figure 3 - section bb in fig.I.

An orifice device for releasing stuck pipes comprises a housing 1 placed in the housing a measles 2 with a rod 3 and a stator A of a linear impulse motor. The stator 4 is connected with the rod core 2 by means of elastic elements 5 and hydraulic dampers 6.

Coaxially with a linear impulse motor in the housing 1, the main and additional power cylinders 7 with the working cavities of the annular cross section connected hydraulically to the elastic reservoir 8 are connected in series with the hydraulic reservoirs 8 and the outgoing ends are connected to the thrust washers 10. Itok 3 The core 2 is equipped with stops 11, which are installed with the possibility of sequential action on the thrust washer of 10 hydraulic cylinders corresponding to each of them. An elastic element 12 is installed between one of the thrust washers and the anvil.

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A wellhead to release stuck pipes works as follows.

The housing 1 of the device is suspended to the lifting mechanism of the drilling or lifting installation, and the rod 3 core 2 is screwed to the stuck pipe string. By moving the device body 1 in the vertical direction with the help of a lifting mechanism, a certain static tension is created in the pipe string. At the same time, the measles 2 and the stator 4 are not displaced relative to each other, and the linear pulse motor occupies a position in which its weight, including the weight of the core rod, and the force transmitted to the measles from the tensioned column side, is balanced by the forces of the thrust washers 10 power cylinders 7 on the stops 11.

When the body I moves relative to the core 2 with the rod 3 upward, the elastic element 12 is first damped, then the hydraulic cylinders 7 alternately come into action. At the moment of the stop 11 contacting the stop washer 10, the mutual movement of the core relative to the body stops until the column tension increases by an amount that can balance the pressure forces of the fluid in the hydraulic cylinder 7. Further movement of the core 2 relative to the housing 1 in the hydraulic cylinder 7.

Further movement of the core 2 relative to the housing 1 until the next stop 11 contacts the stop washer 10 takes place without a significant increase in the tension force of the column. This is due to the fact that the pressure in the hydraulic cylinders 7 varies insignificantly, since their cavities are hydraulically connected with the elastic reservoir 8. Thus, the step-like law of the stiffness characteristic of the core 2 in the housing 1 is provided, which makes it possible to create a stable, different by the value of the static tension of the column.

As a worker, one chooses such a position of a linear impulse motor in the body, which corresponds to a point on the gentle slope of the fire characteristic. The number of such sections is determined by the number of power cylinders 7 in series in the casing 7. It is recommended to provide 2-4 hydraulic cylinders in the device structures.

To eliminate sticking of the pipe string, a series of linen inclusions is made.

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bringing the linear PULSE DND into an operational state.

Claims (1)

Thus, the wellhead to release stuck pipes makes it possible to create powerful force impulses to form deformation waves in the LONNR in a wide range of preliminary static tension. This simplifies the changeover of the device to a predetermined static tension force. Invention Formula A wellhead device for releasing stuck pipes, comprising a housing, a linear pulse motor located therein, with a stem, a rod and a stator, mounted in a housing coaxially with the stem of a linear pulse pulse power cylinder, which is hydraulically connected to an elastic reservoir, which is effective pulse motor with a variety of 25 release of stuck pipes values of static tension of the column. When the engine triggers, the measles 2 and the stator A perceive the same in magnitude but opposite in direction power pulses. The action of the impulse load on the stator leads to the accumulation in it of kinetic energy dissipated in the hydraulic dampers 6. The impulse load acting on the measles is transmitted through the rod 3 to the stuck pipe string. The static tension force of the column is balanced by the forces of fluid pressure in the hydraulic cylinders 7. The work performed by the linear pulse motor is almost completely expended on the formation of deformation waves of the column. I The adjustment of the device to a predetermined force of static tension of the column is carried out by moving with the help of a lifting mechanism of the body I in the vertical direction. This does not require changes in the fluid pressure in the hydraulic system and the movement of the core 2 relative to the stator 4 for by reducing the time spent on bringing the device to its working position while simplifying the design of the device, it is equipped with additional power hydraulic cylinders connected hydraulically to the elastic pe c-pnvapoM coaxially fixed to the main body along with the main and complementary power hydraulic cylinders the thrust shafts rigidly connected with their pistons, s (j ppok of the linear impulse motor core are the stops installed by the possibility of sequential interaction in the working position the thrust washer of each main or additional hydraulic cylinders corresponding to each of them, with one of the stops I4TOK.J of the linear pulse motor core is spring-loaded relative to the corresponding thrust washer of the power hydraulic cylinder, and the stator of the linear impulse engine is mounted in the housing with the possibility of axial movement and has elastic elements and hydraulic dampers associated with the core of a linear pulse motor. five 0 five 0 FIG. 2 / Yu eight