CN204283217U - Turbine oscillator - Google Patents

Abstract

The turbine oscillator relates to the technical field of oil exploitation, including a lower joint, an outer cylinder, and an upper joint that are screwed together from bottom to top. The upper end of the lower joint is internally threaded to connect the lower valve seat, and the upper end of the lower valve seat is provided with a lower valve plate. The lower valve plate is provided with a semi-circular arc-shaped lower valve plate hole; the rotor mandrel is arranged in the outer cylinder, and a blind hole is axially arranged at the lower end of the rotor mandrel, and the upper valve seat is connected with the inner thread of the blind hole, and the lower end of the upper valve seat is The upper valve plate is connected, and the upper valve plate is provided with a semicircular arc-shaped upper valve plate hole; the turbine stator and the turbine rotor are arranged between the upper end of the rotor mandrel and the outer cylinder, the turbine stator is fixed on the inner wall of the outer cylinder through the stator locking ring, and the turbine rotor It is fixed on the rotor mandrel by a lock nut; a ring cavity is formed between the rotor mandrel below the turbine rotor and the outer cylinder, and a mandrel through hole is set on the rotor mandrel, and the mandrel through hole connects the ring cavity with the rotor mandrel The blind holes are connected. The utility model simplifies the oscillator structure and improves the service life.

Description

turbo oscillator

technical field

The utility model relates to the technical field of petroleum exploitation, in particular to a hydraulic oscillator for drilling which can effectively increase the drilling pressure of a drill bit to increase the drilling speed in the exploitation of complex-structured wells such as highly deviated wells and horizontal wells.

Background technique

Presently known hydraulic oscillator is to use single screw as the vibration power motor. Due to the high-speed rotation of the single-screw rotor in the stator, the life of the rubber tube in the stator is greatly shortened, and the phenomenon of degumming and puncturing occurs, which cannot meet the needs of the site.

Contents of the invention

The purpose of the utility model is to solve the problems of short service life of the single-screw oscillating motor of the existing hydraulic oscillator and the difficulty in processing the stator, and provide a turbine oscillator which simplifies the structure of the oscillator and improves the service life.

The purpose of this utility model is achieved in this way: the turbine oscillator includes a lower joint, an outer cylinder, and an upper joint that are threaded sequentially from bottom to top, and the upper end of the lower joint is internally threaded to connect the lower valve seat, and the lower valve seat The upper end of the upper end of the rotor is provided with a lower valve plate, and the lower valve plate is provided with a semicircular arc-shaped lower valve plate hole; a rotor core shaft is provided in the outer cylinder, and the diameter of the lower end of the rotor core shaft is larger than the diameter of the upper end, and a blind is arranged axially at the lower end of the rotor core shaft. The upper valve seat is connected to the blind hole internal thread, and the upper valve plate is connected to the lower end of the upper valve seat. The upper valve plate is provided with a semicircular arc-shaped upper valve hole, and the upper valve plate is correspondingly arranged above the lower valve plate; A turbine stator and a turbine rotor are arranged between the upper end of the rotor core shaft and the outer cylinder, the turbine stator is fixed on the inner wall of the outer cylinder through a stator locking ring, and the turbine rotor is fixed on the rotor core shaft through a lock nut; under the turbine rotor An annular cavity is formed between the rotor mandrel and the outer cylinder, and a mandrel through hole is arranged on the rotor mandrel, and the mandrel through hole communicates the annular cavity with the blind hole of the rotor mandrel.

The working principle of the utility model: during the drilling process, the cement slurry passes through the turbine stator and impacts the rotor blades, so that the turbine rotor rotates at a high speed, drives the rotor mandrel to rotate, and then drives the valve plate to rotate. Since the lower valve plate is fixed, the through holes of the valve plate overlap for a while and close for a while, that is, the area of the flow channel changes periodically from large to small and then from small to large. Periodic relative motion causes periodic changes in the cross-sectional area (maximum and minimum) of fluid flow through the tool.

When the valve hole is at the minimum, the cross-sectional area of the fluid passing through the tool is the smallest, and a maximum pressure drop is generated after passing through the tool; when the valve hole is at the largest, the fluid cross-sectional area through the tool is the largest, so the pressure drop generated is the smallest ; Periodic changes in the cross-sectional area lead to synchronous periodic changes in the upstream pressure.

As the pressure varies from time to time, the downward thrust generated in the drilling tool is also from time to time, and at the same time, under the elastic action of the drilling tool, other drilling tools connected with the tool reciprocate in the axial direction, forming oscillation . The temporary static friction of the drilling tool at the bottom of the well is changed into dynamic friction, which reduces the frictional resistance, so the tool can effectively reduce the drilling tool drag phenomenon caused by the wellbore trajectory, and at the same time generate periodic pressure on the lower drilling tool to realize Drill in quickly.

The utility model has the following characteristics:

1. Simple structure, long life and stable performance.

2. Change the pressurization method of the drill bit. Change the simple mechanical pressurization to a pressurization method combining mechanical and hydraulic power to provide real and effective drilling pressure for the drill bit;

3. Avoid false weight-on-bit and drilling tool bending when drilling in highly deviated well sections, eliminate the influence of highly deviated wells and horizontal wells from the gravity component, buoyancy and frictional resistance of drilling tools, and obtain real and stable drilling pressure;

4. Reduce friction and prevent back pressure. During the drilling process, the oscillator makes the upper and lower drilling tools reciprocate longitudinally in the wellbore, so that the static friction of the drilling tool downhole becomes dynamic friction, which greatly reduces the frictional resistance. The tool can effectively reduce the friction caused by the wellbore trajectory. Drill tool back pressure phenomenon, to ensure effective drilling pressure.

As an improvement of the utility model, the turbine stator includes a stator mounting seat and stator blades, the stator mounting seat is fixed on the inner wall of the outer cylinder, and the stator blades are fixed on the inner periphery of the stator mounting seat; the turbine rotor includes a rotor mounting seat and rotor blades , the rotor mounting seat is fixed on the rotor core shaft, the rotor blades are fixed on the outer periphery of the rotor mounting seat, and the rotor blades are arranged below the stator blades.

In order to make the rotor mandrel centered in the outer cylinder, a righting steel ball is arranged between the outer cylinder and the lower end of the rotor mandrel, a steel ball installation groove is arranged on the rotor mandrel, and the righting steel ball is arranged in the steel ball installation groove.

In order to ensure the tightness, a first O-ring is provided between the lower joint and the lower valve seat, between the rotor core shaft and the upper valve seat, and between the upper end of the outer cylinder and the upper joint, the outer cylinder A second O-ring is arranged between the lower end of the lower joint and the lower joint.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the lower valve plate.

FIG. 3 is a top view of FIG. 2 .

Detailed ways

As shown in Figure 1, the turbine oscillator includes a lower joint 10, an outer cylinder 3, and an upper joint 1 that are threaded in turn from bottom to top, between the upper end of the outer cylinder 3 and the upper joint 1, the lower end of the outer cylinder 3 and the lower joint 10 Second O-rings 13 are arranged between them.

The upper end of the lower joint 10 is internally threaded to connect the lower valve plate seat 9, the upper end of the lower valve plate seat 9 is provided with a lower valve plate 8, and the lower valve plate 8 is provided with a semicircular arc-shaped lower valve plate hole 8-1 (as shown in Figures 2 and 3). Show). A rotor mandrel 7 is arranged inside the outer cylinder 3, the diameter of the lower end of the rotor mandrel 7 is larger than the diameter of the upper end, a righting steel ball 11 is arranged between the outer cylinder 3 and the lower end of the rotor mandrel 7, and a steel ball installation groove 7-1 is arranged on the rotor mandrel 7 , The righting steel ball 11 is arranged in the steel ball installation groove 7-1. A blind hole 7-2 is axially arranged at the lower end of the rotor core shaft 7, and the upper valve seat 15 is connected with the internal thread of the blind hole 7-2. A semicircular arc-shaped upper valve plate hole 14 - 1 is provided, and the upper valve plate 14 is correspondingly arranged above the lower valve plate 8 . A first O-ring 12 is provided between the lower joint 10 and the lower valve seat 9 and between the rotor core shaft 7 and the upper valve seat 15 .

A turbine stator 5 and a turbine rotor 6 are arranged between the upper end of the rotor core shaft 7 and the outer cylinder 3. The turbine stator 5 includes a stator mounting seat 5-1 and a stator blade 5-2, and the stator mounting seat 5-1 passes through the stator locking ring. 4 is fixed on the inner wall of the outer cylinder 3, and the stator blade 5-2 is fixed on the inner periphery of the stator mounting seat 5-1. The turbine rotor 6 includes a rotor mounting base 6-1 and a rotor blade 6-2, the rotor mounting base 6-1 is fixed on the rotor mandrel 7 through a lock nut 2, and the rotor blade 6-2 is fixed on the rotor mounting base 6-1. outer periphery, and the rotor blade 6-2 is disposed below the stator blade 6-1. An annular cavity 16 is formed between the rotor mandrel 7 below the turbine rotor 6 and the outer cylinder 3, and a mandrel through hole 7-3 is arranged on the rotor mandrel 7, and the mandrel through hole 7-3 connects the annulus 16 and the rotor core. The blind holes 7-2 of the shaft 7 communicate with each other.

Claims (4)

1. Turbine oscillator, including a lower joint, an outer cylinder, and an upper joint that are threaded sequentially from bottom to top. It is characterized in that: the upper end of the lower joint is internally threaded to connect the lower valve seat, and the upper end of the lower valve seat is provided with a lower For the valve plate, the lower valve plate is provided with a semicircular arc-shaped lower valve plate hole; a rotor mandrel is arranged in the outer cylinder, the diameter of the lower end of the rotor mandrel is larger than the diameter of the upper end, and a blind hole is axially arranged at the lower end of the rotor mandrel. The inner thread of the hole is connected to the upper valve plate seat, and the upper valve plate is connected to the lower end of the upper valve plate seat. The upper valve plate is provided with a semicircular arc-shaped upper valve plate hole, and the upper valve plate is correspondingly arranged above the lower valve plate; A turbine stator and a turbine rotor are arranged between the upper end of the turbine and the outer cylinder, the turbine stator is fixed on the inner wall of the outer cylinder through a stator locking ring, and the turbine rotor is fixed on the rotor core shaft through a lock nut; the rotor core shaft below the turbine rotor An annular cavity is formed between the outer cylinder and the rotor mandrel, and a mandrel through hole is arranged on the rotor mandrel, and the mandrel through hole communicates the annular cavity with the blind hole of the rotor mandrel. 2. The turbine oscillator according to claim 1, characterized in that: the turbine stator comprises a stator mounting seat and stator blades, the stator mounting seat is fixed on the inner wall of the outer cylinder, and the stator blades are fixed on the inner periphery of the stator mounting seat; The turbine rotor includes a rotor mounting seat and rotor blades, the rotor mounting seat is fixed on the rotor core shaft, the rotor blades are fixed on the outer periphery of the rotor mounting seat, and the rotor blades are arranged below the stator blades. 3. The turbine oscillator according to claim 1, characterized in that: a righting steel ball is arranged between the outer cylinder and the lower end of the rotor mandrel, a steel ball installation groove is arranged on the rotor mandrel, and the righting steel ball is arranged in the steel ball installation groove Inside. 4. The turbine oscillator according to claim 1, characterized in that: a first O-ring is provided between the lower joint and the lower valve seat, and between the rotor mandrel and the upper valve seat, A second O-shaped sealing ring is arranged between the upper end of the outer cylinder and the upper joint, and between the lower end of the outer cylinder and the lower joint.