RU62416U1 - VIBRATION DRILLING WELL - Google Patents

Abstract

The proposal relates to drilling equipment and is intended for vibration drilling of wells. A device for vibration drilling of wells includes a housing, a rod with a through passage, hermetically mounted inside the housing. The rod is equipped with upper and lower rows of radial holes, separated by a blank partition, installed in the passage channel of the rod. The upper and lower rows of the radial holes of the rod communicate with each other through the bypass channel made between the body and the rod. Blades are tangentially placed on the outer surface of the casing, allowing the casing to rotate relative to the rod in the working position, overlapping and changing the passage sections of the upper and lower rows of the radial holes of the rod. From above, the housing is coaxially and rigidly equipped with a pulse generator consisting of a casing and a hollow core, the hollow core being hermetically mounted in the casing and spring loaded upward with the possibility of limited axial movement relative to the casing. The stem is rigidly connected to the casing. The pulse generator converts fluid pulsation into coaxial low-amplitude vibrations on the layout of the drilling tool, thereby contributing to a decrease in the friction forces, which results in improved load transfer, i.e., a smooth loading of the load on the bit and a reduction in torsional stresses in the string, especially during directional drilling , which leads to an increase in the life of the bit. The proposed device has a simple design, and increasing the efficiency of its operation is associated with the ability to flush the device during operation, and the possibility of using the device when drilling small diameter wells expands its functionality. 1 ill. for 1 liter

Description

The proposal relates to drilling equipment and is intended for vibration drilling of wells.

A device for vibration drilling of wells is known (patent RU No. 2239043, E 21 B 7/24, publ. BI No. 30 of 10.27.2004), including a housing, pistons installed with the possibility of interaction with each other and formation together with partitions and seals of closed hydraulic chambers, a valve and a rod having a channel, while one of the pistons is mounted above the rod and has a passage channel of rectangular cross section, inside of which there is a valve made in the form of a pendulum mounted on the axis, the upper end of which is made in the form of a blade, and the lower d - at the same time with the plate, which is installed with the possibility of periodic overlapping of the rod channel.

Closest to the proposed technical solution is a device for vibration drilling of wells (patent RU No. 2258791, E 21 B 7/24, published in BI No. 23 dated 08/08/2005), comprising a housing, a rod with a through channel, a nipple and a key wherein the device is equipped with pistons, each of which is installed inside the protective sleeve fixed in the housing, and is equipped with a confuser, a diffuser and a nozzle forming a jet pump, the suction channel of which is connected to the piston cavity, and in the passage channel of the rod for placing the ball in it saddle with the possibility of partial leakage of fluid under the ball, and the rod bends are made to change the fluid flow direction by 180 ° and channels connecting rock fracture zones with zones of vacuum created by the liquid jet of reverse bends.

Both prototype and analogue in one way or another have common disadvantages:

- firstly, the complexity of the design, due to the large number of nodes and parts;

- secondly, the design of the device does not allow drilling of small diameter wells;

- thirdly, the device in the process of work gets dirty and is not washed, in connection with which the efficiency of its work deteriorates;

- fourthly, a rigid supply of load to the bit reduces its service life.

The technical task of the utility model is to simplify the design of the device and increase the life of the bit, as well as increase the efficiency of the device with the possibility of its use when drilling wells of small diameter.

This problem is solved by a device for vibration drilling of wells, comprising a housing, a rod with a passage channel located inside the housing.

What is new is that the stem is provided with upper and lower rows of radial holes separated by a blank partition, installed in the stem passage channel, and communicating with each other by the bypass channel made between the housing and the stem, with blades tangentially placed on the outer surface of the housing allowing the position of the body to rotate relative to the rod, overlapping and changing the passage sections of the upper and lower rows of the radial holes of the rod, while the rod is coaxially and rigidly connected to the generator from above pulse generator, consisting of a casing and a hollow core, and the hollow core is hermetically installed in the casing and is spring-loaded upward with the possibility of limited axial movement relative to the casing.

The figure 1 shows the proposed device for vibration drilling of wells.

The figure 2 shows a cross section of the device along the upper row of radial holes of the device.

A device for vibration drilling of wells includes a housing 1 (see figure 1), a rod 2 with a passage channel 3, hermetically mounted inside the housing 1.

The rod 2 is equipped with upper 4 and lower 5 rows of radial holes, separated by a blank partition 6, installed in the passage channel 3 of the rod 2.

The upper 4 and lower 5 rows of the radial holes of the rod 1 communicate with each other through the bypass channel 7, made between the housing 1 and the rod 2. On the outer surface of the housing 1 tangentially placed blades 8, allowing in the working position of the housing 1 to rotate relative to the rod 2, overlapping and changing flow sections of the upper 4 (see figure 2) and lower 5 (see figure 1) rows of radial holes of the rod 2.

On top, the housing 1 is coaxially and rigidly connected to a pulse generator 9, consisting of a casing 10 and a hollow core 11, the hollow core 11 being sealed in the casing 10 and spring loaded upward by means of a spring 12 with limited axial movement relative to the casing 10. The rod 2 is rigidly connected to casing 10.

The device operates as follows.

The device is installed in the layout of the drilling tool as shown in figure 1, and on the upper end of the hollow core 11 of the pulse generator 9 is screwed onto the shaft of a downhole motor (VZD) 13, and a bit 14 (for example, abrasive) having a central channel 15 and working

surface 16. In order to avoid "pistoning" during operation of the pulse generator 9, the casing 10 is equipped with a technological hole 17.

The device at the end of the drill pipe string (not shown in FIGS. 1 and 2) is lowered into the borehole during the drilling interval, after which fluid is supplied to the drill pipe string and the IDT 13, while the fluid flow enters the hollow core 11 and then through the inner space 18 the casing 10 of the pulse generator 9 enters the passage channel 3 of the rod 2 above the blind partition 6 and then through the upper row of radial holes 4 of the rod 2 into the bypass channel 7 (due to the blind partition 6 made in the passage channel 3 of the rod 2), from where the liquid flows through the bottom rowthe adial holes 5 of the rod 2 enters the passage channel 3 of the rod 2 below the blind partition 6 and rises upward (between the device and the inner walls of the well) through the central channel 15 of the bit 14 and upon reaching the casing 1, the fluid flow acts on the blades tangentially placed on the outer surface of the casing 1 9, which leads to the rotation of the housing 1 relative to the rod 2. Next, the fluid flow rises at the wellhead and circulation appears, after which the drilling of the well begins, while the fluid flow through the drill pipe string and the VZD 13 enters the hollow core 11 and then through the inner space 18 of the casing 10 of the pulse generator 9 enters the passage channel 3 of the rod 2 above the blind partition 6 and reaches the upper row 4 of the radial holes of the rod 2, while the rotating housing 1, relative to the rod 2, first increases the cross section of the upper row 4 (see figure 2) of the radial holes of the rod 2 until they are fully opened, and then reduces the passage section of the upper row 4 of the radial holes of the rod 2 until they are completely closed.

As a result, a pulsating fluid flow enters the passage channel 7 (see FIG. 1), which goes down the bypass channel 7 and reaches the bottom row 5 of the radial holes of the rod 2, while the housing 1 continues to rotate relative to the rod 2, first increasing the passage section of the lower row 5 of the radial holes of the rod 2 until they are fully open, and then reducing the passage section of the bottom row 5 of the radial holes of the rod 2 until they are completely closed, while the fluid flow, pulsating, enters the passage channel 3 of the rod 2 below the blind partition and 6, from where the fluid flow enters the central channel 15 of the bit 14.

Thus, during operation of the device, when the rotating housing 1 closes the upper 4 and lower 5 rows of the radial holes of the rod 2, the pressure in the inner space 18 of the casing 10 of the pulse generator 9 increases and the fluid flow acts from below on the lower end of the hollow core 11, compressing the spring 12, which leads to the movement of the hollow core 11, as well as VZD 13 and the entire layout of the drill

tool up, that is, the pulse generator 9 increases in length. When the rotating housing 1 opens the upper 4 and lower 5 rows of the radial holes of the rod 2, the pressure in the inner space 18 of the casing 10 of the pulse generator 9 decreases and at this moment the upward movement of the hollow core 11 in the casing 10 of the pulse generator 9, VZD 13 and the entire assembly of the drilling tool stops , the pulse generator 9 is reduced in length and due to the return force of the spring 12, the above structural elements of the device are lowered, while the hollow core 11 is returned to its original position (see figure 1).

Further, the above described cycle is repeated, while there is a pulsation of the liquid, leading to vibration of the device. The pulsation frequency is directly proportional to the flow rate. The pulse generator converts fluid pulsation into coaxial low-amplitude vibrations on the layout of the drilling tool, thereby contributing to a decrease in the friction forces, which results in improved load transfer, i.e., a smooth loading of the load on the bit and a reduction in torsional stresses in the string, especially during directional drilling , which leads to an increase in the life of the bit.

The proposed device has a simple design, and increasing the efficiency of its operation is associated with the ability to flush the device during operation, and the possibility of using the device when drilling small diameter wells expands its functionality.

Claims (1)

A device for vibrational drilling of wells, comprising a housing, a rod with a passage channel located inside the housing, characterized in that the rod is provided with upper and lower rows of radial holes separated by a blank partition, installed in the passage channel of the rod, and communicating with each other via a bypass channel made between the body and the stem, and on the outer surface of the body tangentially placed blades that allow the body to rotate relative to the rod in the working position, blocking and changing the passage cross sections of the upper and lower rows of the radial holes of the rod, with the top of the rod coaxially and rigidly connected to a pulse generator consisting of a casing and a hollow core, the hollow core being hermetically mounted in the casing and spring loaded upward with the possibility of limited axial movement relative to the casing.