RU60121U1 - VIBRATION DRILLING WELL - Google Patents

Abstract

The proposal relates to drilling equipment and is intended for vibration drilling of wells. A device for vibratory drilling of wells includes a housing, a nipple mounted inside the housing and a rod located inside the nipple, the rod having the possibility of limited axial movement relative to the nipple with the housing. The rod is made deaf, and the nipple is provided with upper and lower rows of radial holes that communicate through the bypass channel made between the body and the nipple. The bottom nipple is provided with an inner ring sample, relative to which the rod is spring-loaded by means of a spring and overlaps the upper row of radial holes of the nipple in the initial position. From above, a pulse generator consisting of a casing and a core is coaxially and rigidly connected to the casing, the core being hermetically mounted in the casing and spring-loaded upward with the possibility of limited axial movement relative to the casing. The pulse generator converts the pulsation of the fluid into coaxial low-amplitude vibrations on the layout of the drilling tool, thereby contributing to a decrease in the friction forces. The result of which is an improvement in load transfer, that is, a smooth loading of the load on the bit and a reduction in torsional stresses in the string are ensured, 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 associated with the ability to flush the device during operation, and the ability to use 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 st at the same time with the plate, which is installed with the possibility of periodic overlapping of the stem 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 is contaminated and not washed during operation, and therefore its performance is deteriorating.

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 vibrational drilling of wells, comprising a housing, a nipple installed inside the housing and a rod located inside the nipple, while the rod has the possibility of axial movements relative to the nipple with the housing.

What is new is that the stem is blind, and the nipple is provided with upper and lower rows of radial holes that communicate through a bypass channel made between the body and the nipple, while the nipple is provided with an inner ring selection from below with respect to which the rod is spring-loaded and overlaps the upper row of radial holes of the nipple in the initial position, while on top of the housing coaxially and rigidly equipped with a pulse generator, consisting of a casing and a hollow core, and the hollow core is hermetically installed in the casing and spring-loaded with limited axial movement relative to the casing.

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

The device for vibratory drilling of wells includes a housing 1, a nipple 2 mounted inside the housing 1 and a rod 3 located inside the nipple 2, while the rod 3 has the possibility of limited axial movement relative to the nipple 2 with the housing 1. The rod 3 is made deaf, and the nipple 2 is provided the upper 4 and lower 5 rows of radial holes that communicate through the bypass channel 6, made between the housing 1 and the nipple 2. The bottom nipple 2 is equipped with an inner ring sample 7, relative to which the rod 3 is spring loaded ruzyne 8 and overlaps the upper row of radial holes 4 of the pin 2 in the initial position.

From above, the housing 1 is coaxially and rigidly equipped with a pulse generator 9, consisting of a casing 10 and a hollow core 11, the hollow core 11 being hermetically installed in the casing 10 and spring loaded upward by means of a spring 12 with the possibility of limited axial movement relative to the casing 10.

The device operates as follows.

The device is installed in the layout of the drilling tool as shown in the figure, and the lower end of the turbodrill 13 is screwed onto the upper end of the hollow core 11 of the pulse generator 9, and a bit 14 (for example, abrasive) having a central channel 15 and an abrasive working surface is screwed into the lower end of the housing 1 16. In order to avoid "pistoning" during operation of the device, the casing 10 is equipped with a technological hole 17.

The device at the end of the drill pipe string (not shown in FIG.) Is lowered into the well during the drilling interval. Then restore the circulation of fluid through the string of drill pipes and a turbodrill 13, while the fluid flow, reaching the device

enters the hollow core 11 and then through the inner space of the casing 10 of the pulse generator 9 enters the housing 1. The fluid pressure inside the casing 1 and the inner space 18 of the casing 10 of the pulse generator 9 increases.

The fluid flow inside the housing 1 exerts an influence on the stem 3 from above. At the same time, the fluid flow in the inner space 18 of the casing 10 of the pulse generator 9 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, the turbodrill 13 and accordingly, the entire assembly of the drilling tool up, that is, the pulse generator 9 increases in length, while the rod 3, compressing the spring 8, goes down relative to the nipple 2 with the housing 1 until the upper row opens for the sake of openings 4, which was blocked by the rod 3 in the initial position, while the upward movement of the hollow core 11 in the casing 10 of the pulse generator 9, the turbodrill 13 and, accordingly, the entire assembly of the drilling tool is stopped and the hollow core 11 is rigidly connected to the turbodrill 13 due to the return force of the spring 12 fall down and returns to its original position, that is, the pulse generator 9 is reduced in length.

At this moment, the fluid flow through the upper row of radial holes 4 of the nipple 2 opened under the pressure of the liquid through the bypass channel 6 through the lower row of radial holes 5 of the nipple 2 enters the central channel 15 of the bit 14 and then onto the abrasive working surface 16, while the fluid pressure above the stem 3 falls, and the latter due to the return force of the spring 8 is returned back, blocking the upper row of radial holes 4 of the nipple 2. The fluid continues to circulate, while the fluid pressure in the inner space of 18 to burner 10 of the pulse generator 9 and above the rod 3 inside the housing 1 again increases. Subsequently, the cycle described above is repeated, with a ripple of the liquid leading to vibration of the device. The pulsation frequency is directly proportional to the flow rate.

The pulse generator converts the pulsation of the fluid into coaxial low-amplitude vibrations on the layout of the drilling tool, thereby contributing to a decrease in the friction forces. The result of which is an improvement in load transfer, that is, a smooth loading of the load on the bit and a decrease in torsional stress in the string are ensured, 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 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 nipple installed inside the housing and a rod located inside the nipple, the rod having the possibility of axial movements relative to the nipple with the housing, characterized in that the rod is blind and the nipple is provided with upper and lower rows of radial holes which are communicated by means of a bypass channel made between the housing and the nipple, the nipple being provided at the bottom with an internal annular selection, relative to which the rod is spring-loaded and overlaps The outer row of radial holes of the nipple is in the initial position, with the top of the housing coaxially and rigidly equipped with a pulse generator consisting of a casing and a hollow core, the hollow core being hermetically seated in the casing and spring-loaded upward with the possibility of limited axial movement relative to the casing.