RU58596U1 - 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 rod installed inside the housing, as well as a saddle made in the passage channel of the rod to accommodate the ball. The rod is equipped with upper and lower rows of radial holes that communicate with each other through the bypass channel made between the body and the rod. Blades are tangentially placed in the bypass channel on the inner surface of the casing, allowing the casing to rotate relative to the rod, partially overlapping and changing the passage section of the lower row of radial holes of the rod. During the operation of the device, a pulsation of the liquid occurs, leading to vibration of the device, while the frequency of the pulsations is directly proportional to the flow rate of the liquid. As a result, the cone bit only vibrates, excluding impact loads, which significantly extends 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 descent on a flexible pipe and the use of 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 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 of 08.20.2005), comprising a housing, a rod with a passage 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 under-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 the prototype and the analogue, to one degree 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, the device creates shock loads on the bit, which leads to its rapid breakdown and, accordingly, failure;

- fifthly, it is impossible to operate the device when lowering it on a flexible pipe.

The technical task of the utility model is to simplify the design of the device, eliminate shock loads on the bit during operation of the device and increase the efficiency of its operation, as well as the ability to lower the device on a flexible pipe and use the device when drilling small diameter wells.

This problem is solved by a device for vibrational drilling of wells, comprising a housing, a rod with a passage channel, and also a saddle made in the passage channel of the rod to place a ball in it.

What is new is that the stem is provided with upper and lower rows of radial holes that communicate with each other through a bypass channel made between the body and the rod, while in the bypass channel on the inner surface of the body tangentially placed blades that allow the body to rotate relative to the stem, partially overlapping and changing the bore of the lower row of the stem radial holes.

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

A device for vibratory drilling of wells includes a housing 1, a rod 2 mounted inside the housing 1, as well as a saddle 3 made in the passage channel 4 of the rod 2 for placement of a ball 5 in it.

The rod 2 is equipped with an upper 6 and lower 7 rows of radial holes that communicate with each other through the bypass channel 8, made between the housing 1 and the rod 2.

In the bypass channel 8, blades 9 are tangentially placed on the inner surface of the housing 1, allowing the housing 1 to rotate relative to the rod 2, partially overlapping and changing the passage section of the lower row of radial holes 7 of the rod 2.

The device operates as follows.

The device is installed in the layout of the drilling tool as shown in the figure, with the upper end of the rod 2 being screwed onto the shaft of the downhole motor (VZD) 10, and screwed into the lower end of the housing 1 on a bit 11 (for example, roller cone) having a central channel 12.

The device at the end of the flexible pipe or drill pipe string (not shown in Fig.) Is lowered into the well during the drilling interval, after which the fluid circulation in the drill pipe string is restored through the VZD 10, while the fluid flow, reaching the device, enters the rod 2, with this ball 5 sits on the seat 3 and hermetically closes the passage channel 4.

As a result, the fluid flow through the upper row of radial holes 6 of the rod 2 enters the bypass channel 8, where it acts tangentially placed on

the inner surfaces of the casing 1 of the blade 9, which leads to the rotation of the casing 1 relative to the rod 2. The fluid flow rotates down the bypass channel 8, reaching the bottom row of radial holes 7, while the casing 1, rotating relative to the rod 2, increases the passage section of the lower row radial holes 7, opening them and passing the fluid flow into the passage channel 4 below the seat 3 of the rod 2. From where the fluid flow enters the central channel 12 of the bit 11, and from there to the cones 13. The housing 1 continues to rotate and reduces the passage section of the bottom row of radial holes 7 of the rod 1, overlapping them.

In the future, a cycle with a change in the bore of the lower row of radial openings 7 of the rod 2 is repeated, with a ripple of the liquid leading to vibration of the device, while the ripple frequency is directly proportional to the flow rate of the liquid. As a result, the cone bit only vibrates, excluding impact loads, which significantly extends 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 descent on a flexible pipe and the use of the device when drilling small diameter wells expands its functionality.

Claims (1)

A device for vibratory drilling of wells, comprising a housing, a rod with a passage channel, and a saddle made in the passage channel of the rod to accommodate a ball, characterized in that the rod is provided with upper and lower rows of radial holes that communicate with each other via a bypass channel, made between the housing and the stem, while in the bypass channel on the inner surface of the housing tangentially placed blades that allow the housing to rotate relative to the stem, partially overlapping and changing the passage section of the bottom row of stem radial holes.