UA133325U - DEVICES FOR THE ELIMINATION OF PIPE COLUMN COLLECTION AT THE Borehole - Google Patents

Abstract

The device for eliminating the clamping of the column of pipes in the well contains a housing with an anvil at the top, with a conical annular bore and radial channels. Inside there is a hollow rod with a thrust protrusion and a groove, on which with the possibility of axial movement of the piston with anvil, bumper, spring-loaded retainers, and a disconnect assembly made in the form of a conical collet, which is rigidly fixed to the lower end of the rod, spring-loaded check valve. The rod is connected to the anvil in the upper part of the housing by a slotted pair with the possibility of mutual movement relative to the longitudinal axis of the device.

Description

The utility model belongs to the field of mechanical engineering and can be used in drilling wells, in particular, when performing fishing operations in wells and removing objects from wells using shock means to release trapped parts.

A well-known device for eliminating the seizure of a column of pipes in a well (Patent Mo 89841,

Ukraine, IPC E 21 V 23/00. The device for the elimination of the pipe string in the well /

Kharchenko E. V., Pukach P. Ya., Gutiy A. V. // Application. 30.12.2013 Mo and 201315503; Publ. 25.04.2014 -

Bul. Mo 8.|, which contains a body with an anvil in the upper part, with a conical ring bore and radial channels, inside which there is a hollow rod with a stop protrusion and a groove, on which a piston with an anvil, striker, spring-loaded retainers is mounted with the possibility of axial movement, and disconnection unit, made in the form of a conical collet, which is rigidly fixed on the lower end of the rod, with a locking sleeve with a spring-loaded check valve.

Such a device during a full working cycle creates a double shock load in the emergency pipe column, which is directed only in the longitudinal direction, which may not be enough to release the caught pipe column, its design does not allow to avoid mutual scrolling of the rod relative to the anvil in the upper part of the housing and makes it possible to create a torque the moment in the stuck part of the drill string of pipes, which requires additional time and energy to release the stuck drill and casing strings and drilling tools, reduces the effectiveness of eliminating stuck emergency strings and the productivity of the drilling rig.

The basis of the useful model is the task of improving the device for the elimination of pipe strings in the well, in which a new connection between the rod and the anvil in the upper part of the casing would avoid mutual scrolling between them and create a double shock load in the stuck part of the drill string at the same time. in the longitudinal direction, and the torque, which will reduce the time and energy required to release stuck drill and casing strings and drilling tools, will increase the efficiency of eliminating snags and the productivity of the drilling rig.

The set task is solved by the fact that the device for eliminating catches of the column of pipes in

From the well, which contains a body with an anvil in the upper part, with a conical ring boring and radial channels, inside which is placed a hollow rod with a stop protrusion and a groove, on which a piston with an anvil, a striker, spring-loaded retainers, and a assembly of 'joint made in the form of a conical collet, which is rigidly fixed to the lower end of the rod, with a locking sleeve with a spring-loaded check valve, according to a useful model, has the rod connected to the anvil in the upper part of the body by means of a splined pair with the possibility of mutual movement relative to longitudinal axis of the device.

This allows for the axial movement of the rod relative to the anvil in the upper part of the casing and to avoid the mutual scrolling of the rod relative to the anvil in the upper part of the casing, and thus: to transmit the torque created by the rotor of the drilling rig from the free part of the drill string through the device for eliminating the seizure of the pipe string in well to the captured. That is, with the help of this innovation, it is possible to create a torque in the trapped part of the string at the same time as a double shock load in the longitudinal direction, which increases the effectiveness of eliminating traps, reduces the time and energy required to release trapped drill strings and casings and drilling tools, and increases the productivity of the drilling rig installation

The essence of the useful model is explained by the drawings, which show the device for eliminating the seizure of the pipe column in the well (Fig. 1), finding the rod in the intermediate position (Fig. 2), finding the rod in the upper position (Fig. 3), where: 1 - the body, 2 - rod, C - conical collet, 4 - conical ring boring, 5 - locking sleeve, 6 - spring-loaded check valve, 7 - radial channels, 8 - thrust projection, 9 - piston anvil, 10 - piston, 11 - spring-loaded retainer, 12 - piston striker, 13 - anvil, 14 - groove, 15 - first section of the body, 16 - second section of the body, 17 - splined pair.

The device for the elimination of a string of pipes in the well contains a body 1 with an anvil 13 in the upper part, with a conical ring boring 4 and radial channels 7, inside which are placed a hollow rod 2 with a stop projection 8 and a disconnection node, made in the form of a conical collet Z , which is rigidly fixed at the lower end of the rod 2, with a locking sleeve 5 with a spring-loaded check valve 6. A groove 14 is made on the part of the rod 2 above the stop protrusion 8 and a piston 10 is installed with an anvil 9 of the piston 10, striker 12 of the piston 10 and spring-loaded latches 11 with the possibility of mutual movement relative to each other.

The piston 10 is rigidly connected to the anvil 9 of the piston 10 and the striker 12 of the piston 10. In the inner part of the piston 10, spring-loaded latches 11 are installed, which, when combined with the groove 14, fix the piston 10 relative to the rod 2. The inner cavity of the housing 1 is formed by two hermetically isolated relative to each other in sections: the first section 15 and the second section 16. In the first section 15, the lower part of the rod 2 with a stop protrusion 8, a conical collet 3, a locking sleeve 5 with a spring-loaded check valve 6 are placed in the first section 16, in which there is a piston 10 with striker 12 of the piston 10, made in the form of two hydraulically interconnected chambers of different cross-sections, of which the lower chamber has a smaller cross-section, and the upper one has a larger one, due to the longitudinal grooves made on the wall of the housing 1. To the upper part of the housing 1 by the anvil 13 is connected by means of a threaded connection. A conical collet 3 is rigidly attached to the lower end of the rod 2, which interacts with the conical ring bore 4 of the housing 1 and locking sleeve 5, which is movable relative to the rod 2 with a conical collet 3. The rod 2 is connected to the anvil 13 in the upper part of the housing 1 by means of a splined pair 17 with the possibility of mutual movement relative to the longitudinal axis of the device.

The device for the elimination of a column of pipes in a well works as follows.

First, the uncaught part of the drill string is disconnected from the caught part. Next, between them, a device is installed to eliminate the pipe column from getting stuck in the well, connecting rod 2 to the free part of the column, and body 1 to the stuck part. Then, with the help of the rotor of the drilling rig, the emergency column is twisted, and due to the fact that the rod 2 and the anvil 13 in the upper part of the housing 1 are connected to each other with the help of a splined pair 17, that is, without the possibility of mutual scrolling relative to each other, the torque is transmitted from the uncaught part of the string through the device for eliminating the clinging of the pipe string in the well to the caught part.

The drilling pump is turned on and flushing fluid is pumped into the pipes until the required pressure is created in the injection line. At the same time, the non-return valve 6 opens.

At the same time, the emergency column is pulled using the winch of the drilling rig, which creates longitudinal forces in the column. After pumping the required volume of liquid, stop the pump and release the pressure in the discharge line above the non-return valve 6 by opening the valve. The non-return valve b closes the passage channel in the locking sleeve 5, which, under the influence of the pressure difference, moves up, releasing the conical collet 3. The rod 2 moves sharply up, applying

With the impact of the thrust protrusion 8 on the anvil 9 of the piston 10, which is in the second section 16, hermetically isolated from the first section 15, with the simultaneous opening of the radial channels 7, through which the flushing liquid pulses out of the column of pipes into the atmosphere (Fig. 2). The second section 16 consists of two hydraulically interconnected chambers of different cross-sections, filled with a working fluid - oil. Shock loads from the piston 10 through the working fluid are transmitted to the housing 1 and the attached part of the column, that is, a hydraulic shock is created in the second section 16 of the housing 1 - the first shock load. The large hydraulic resistance to the movement of the piston 10 is provided by the design of the gap between the rings of the piston 10 and the chamber of the smaller cross-section of the second section 16. The speed of the movement of the piston 10 will be low, which makes it possible to select with the help of the winch of the drilling rig the required impact force and tension force of the emergency assembly . At the same time, the retainers 11 of the piston 10 enter the groove 14, fixing the piston 10 with the anvil 9 of the piston 10 and the striker 12 of the piston 10 relative to the rod 2.

After some time, the piston 10 enters the chamber with a larger cross-sectional area of the second section 16, the walls of which have longitudinal grooves. As a result, the working fluid flows freely from one chamber to another, and the striker 12 of the piston 10, together with the rod 2, moves at high speed to the anvil 13 (Fig. 3) and strikes the anvil 13, creating longitudinal forces in the captured column to move it - second impact load. If, after that, the seizure of the drill string was eliminated, then the device for eliminating the seizure of the pipe string in the well is disconnected from the drill string, and the disconnected parts of the drill string are connected to each other and the drilling of the well is continued. But, if after applying this blow, the drill string was still not freed from the grip, then repeated shock loads are applied.

To deliver a second blow, the emergency assembly is unloaded by disconnecting the winch and the rotor of the drilling rig, lowering rod 2 down. At the same time, the piston 10, moving together with the rod 2, distills the oil through the annular gaps into the piston part and enters the chamber of the smaller cross-section of the second section 16 until it stops in the initial position and stops.

Overcoming the forces of the springs of the latches 11, the rod 2 continues to move down (the latches 11 come out of the groove 14) until the stop of the conical collet Z in the housing 1. After that, the drilling pump is turned on.

At the same time, the locking sleeve 5 moves down, fixing the rod 2 relative to the body 1. This is how the device is charged.

Claims (1)

FORMULA OF THE USEFUL MODEL A device for eliminating the seizure of a string of pipes in a well, which contains a housing with an anvil in the upper part, with a conical ring boring and radial channels, inside which are placed a hollow rod with a stop projection and a groove, on which pistons with an anvil are mounted with the possibility of axial movement , striker, spring-loaded latches, and a disconnection assembly made in the form of a conical collet, which is rigidly fixed to the lower end of the rod, with a locking sleeve with a spring-loaded non-return valve, which is characterized by the fact that the rod is connected to the anvil in the upper part of the body by using a splined pair with the possibility of mutual movement relative to the longitudinal axis of the device. z Ya i рн ny PKU , Kri to I: y She IY NI dents vs Tam mok : y : BEN E v V NI E 5 for Ek Shi eh Ko Uh ! 7. Yah: N Ot AOS Ko AD How! I KA I I Ka and same and MA on Fig. 1