CN201517381U - A hydraulic rotary tool - Google Patents

Abstract

A hydraulic rotary tool is applied to the technical field of oil field well repairing operation. Is characterized in that: consists of a body and a throttle valve. The body is provided with hydraulic holes, the included angle between the hydraulic holes and the circumferential tangent line of the inner cavity is 45 degrees, the central lines of the hydraulic holes are tangent to the inner wall of the inner cavity, and the four hydraulic holes are symmetrically and uniformly distributed in the circumferential direction of the body. Two rows of eight hydraulic holes with the diameter of 20mm are distributed on the body. The throttle valve is welded and fixed in the hydraulic hole. The effect is as follows: the hydraulic power generation device is arranged on the upper parts of tools such as a casing shaper, a milling cone and a milling shoe, and utilizes hydraulic pressure to generate torque to drive the tools on the lower part to rotate, so that friction force is effectively overcome, and the shaping and cutting capabilities of the shaper, the milling cone and the like are improved. In addition, the structure is reasonable, the field use and operation are simple and convenient, the hydraulic pressure is effectively utilized, the generated torque is large, and the hydraulic-.

Description

A hydraulic rotary tool

technical field

The utility model relates to the technical field of oil field workover operations, in particular to a downhole workover tool. It is a device that uses hydraulic pressure to generate torque to drive the lower tool to rotate.

Background technique

In downhole workover operations in the petroleum industry, surface mechanical power and hydraulic pressure are often used at the same time. Ground mechanical power rotates the drill string, and hydraulic pressure circulates the cleaning fluid. For example, when mechanically shaping the downhole deformed casing, a shaper is inserted into the casing, and the shaper needs to be driven by the drill string to rotate, and the center hole of the drill string provides cleaning fluid for the shaper. Another example is when milling downhole casing, there is a milling cone at the lower end of the drill string, the drill string drives the milling cone to rotate, and the center hole of the drill string provides cleaning fluid for the milling cone.

At present, when milling, casing milling or casing shaping in deviated wells, highly deviated wells and horizontal wells, due to the increase of friction between the well wall and the drill string, it is difficult to transmit the rotating torque to the construction section, so ground torque is required during construction larger. At this time, the hydraulic pressure only plays the role of circulation and carrying cuttings, and the hydraulic pressure cannot generate rotational power to the drill string, which is a waste of hydraulic pressure.

Utility model content

The purpose of the utility model is to provide a hydraulic rotary tool, which can generate rotary torque by hydraulic pressure difference to drive the drill string to rotate during the workover operation.

The technical solution adopted by the utility model is: the hydraulic rotary tool is composed of a body and a throttle valve. The body is cylindrical with a central hole, and the upper end of the body has an internal thread, which connects the upper drill pipe to transmit hydraulic pressure, torque and drilling pressure. The lower end of the main body has an external thread, and the external thread is connected with downhole tools such as a shaper and a milling cone. There are hydraulic holes on the body, the angle between the hydraulic holes and the inner cavity circumferential tangent line is 45°, and the center line of the hydraulic holes is tangent to the inner wall of the inner cavity, and four hydraulic holes are symmetrically distributed in a row on the body circumferential direction. Two rows of eight hydraulic holes with a diameter of 20mm are distributed on the body. The throttle valve is welded and fixed in the hydraulic hole. When the high-pressure liquid passes through the throttle valve in the hydraulic hole, a large torque will be generated. Under the action of this torque, the downhole tool will be rotated to overcome resistance such as friction, and effectively improve the shaping and cutting capabilities of the shaper and milling cone.

The throttle valve is in the shape of a cylinder with a central hole; one end of the throttle valve has an inclined plane, and the inclined plane coincides with the outer wall of the body.

When in use, connect the hydraulic rotary tool with the matching shaper or milling cone tool, and after it is lowered to the construction position, start the ground hydraulic system. When the high-pressure liquid passes through the hydraulic hole and the throttle valve, it will generate a reaction force to push the shaper or The milling cone rotates to achieve the purpose of improving construction efficiency and shortening construction time. It can also be used alone for powerful rotary sand washing in highly deviated wells or horizontal wells.

Beneficial effects of the utility model: the hydraulic rotary tool of the utility model is installed on the upper part of the casing shaper, milling cone, shoe grinding tool, etc., and uses hydraulic pressure to generate torque to drive the lower tool to rotate, effectively overcome the friction force, so as to improve the shaping Shaping and cutting capabilities of tools, milling cones, etc. In addition, the utility model has a reasonable structure, is easy to use and operate on site, effectively utilizes hydraulic pressure, and generates a large torque, and can be widely used in various downhole workover tools.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the structure of the utility model hydraulic rotary tool.

FIG. 2 is a schematic diagram of the throttle valve 5 .

In the figure, 1. Body, 2. Hydraulic hole, 3. External thread, 4. Internal thread, 5. Throttle valve.

Detailed ways

Embodiment 1: Taking a hydraulic rotary tool as an example, the utility model is further described in detail.

See Figure 1. The hydraulic rotary tool of the utility model is composed of a body 1 and a throttle valve 5 . The body 1 is cylindrical, with an outer diameter of 114mm and a length of 400mm with a central hole. The upper end of the body 1 has an internal thread 4, and the thread is a 2 ⁷ / ₈ "tubing box or a drill pipe box. The lower end of the body 1 has an external thread 3, and the thread is a 2 ⁷ / ₈ " oil pipe pin or a drill pipe pin. There are two drainage holes 2 on the body 1, each row has four hydraulic holes 2, and the hydraulic holes 2 are evenly distributed along the circumference of the body 1.

The included angle between the hydraulic hole (2) and the tangent line of the inner cavity is 45°, and the center line of the hydraulic hole is tangent to the inner wall of the inner cavity, and the four hydraulic holes are symmetrically and evenly distributed in the circumferential direction of the body. Two rows of eight hydraulic holes with a diameter of 20mm are distributed on the body.

Throttle valve 5 is welded and fixed in hydraulic hole 2. The throttle valve 5 is cylindrical, with an outer diameter of 20 mm and a central hole of 5 mm; the end face of one end of the throttle valve 5 is a slope, and the slope of the throttle valve 5 coincides with the arc surface of the outer wall of the body. During welding, the inclined plane end of the throttle valve 5 is at the outer end of the hydraulic hole 2 .

Claims (2)

1. A hydraulic rotary tool, consisting of a body (1) and a throttle valve (5). The body (1) is cylindrical and has a central hole. The upper end of the body (1) has an internal thread (4), and the body (1) ) has an external thread (3) at the lower end, which is characterized in that: there is a hydraulic hole (2) on the body (1), the angle between the hydraulic hole (2) and the inner cavity circumferential tangent is 45°, and the hydraulic hole (2) The center line is tangent to the inner wall of the inner cavity. The four hydraulic holes (2) are arranged symmetrically and evenly in a row on the body (1), and two rows of eight hydraulic holes (2) with a diameter of 20mm are distributed on the body (1). , the throttle valve (5) is welded and fixed in the hydraulic hole (2). 2. The hydraulic rotary tool according to claim 1, characterized in that: the throttle valve (5) is cylindrical and has a central hole; the end face of one end of the throttle valve (5) is an inclined plane, and the inclined plane and The outer walls of the body overlap.

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