RU64671U1 - 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. During operation of the device, a pulsation of the liquid occurs, leading to vibration of the device, while the frequency of the ripple 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 the drilling and overhaul of wells and is intended for vibration drilling of wells.

A device for vibrational drilling of wells is known (patent RU No. 2239043, ЕВВ 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 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 - 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 vibratory drilling of wells (patent RU No. 2258791, ЕВВ 7/24, published in BI No. 23 dated 08/08/2005), comprising a housing, a rod with a passage channel, a nipple and a key, with this 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 a saddle is made in the bore of the rod to accommodate the ball with the possibility of partial flow of fluid under the ball, and in the rod, bends are made to change the direction of fluid flow by 180 ° and channels connecting the rock destruction zones to the rarefaction zones created by the reverse fluid stream from the 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 significantly reduces the resource of the bit;

- fifthly, the device is not possible 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 its efficiency, 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 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.

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.

The device operates as follows.

The device is installed in the layout of the drilling tool as shown in figure 1, with the upper end of the rod 2 being screwed onto the shaft of the downhole motor (VZD) 9, and a bit 10 (for example, cone) having a central channel 11 is screwed into the lower end of the housing 1.

The device at the end of a flexible pipe or drill pipe string (not shown in FIG.) Is lowered into the well during the drilling interval, after which fluid is supplied to the drill pipe string (not shown in FIGS. 1 and 2) through the VZD 9 and then through passage channel 3

rod 2 above the blind partition 6 through the upper row of radial holes 4 of the rod 2 into the bypass channel 7 (thanks to the blind partition 6 made in the passage channel 3 of the rod 2), from where the liquid flows through the lower row of radial holes 5 of the rod 2 into the passage channel 3 of the rod 2 below the blind partition 6 and through the central channel 11 of the bit 10 through the cones 13, the fluid flow rises and upon reaching the casing 1 acts on the blades 9 tangentially placed on the outer surface of the casing 1, which leads to rotation of the casing 1 relative but rod 2. Next, the fluid flow rises at the wellhead and circulation appears. After that, the well begins to drill, while the fluid flow through the drill pipe string and the VZD 9 and then through the passage channel 3 of the rod 2 above the blind partition 6 reaches the upper row 4 of the radial holes of the rod 2, while the rotating body 1, relative to the rod 2, first increases the cross section of the upper row 4 (see FIG. 2) of the radial holes of the rod 2 until they open completely, and then reduces the cross 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 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 lower 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 11 of the bit 10, and from there to the cones 12.

In the future, the above process is repeated, while there is a ripple of the liquid, leading to vibration of the device, while the frequency of the ripple 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 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 blind 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 stem in the working position, overlapping and changing the passage same sections of the upper and lower rows of the stem radial holes.