CN215718477U

CN215718477U - Eccentric turbine hydraulic oscillator

Info

Publication number: CN215718477U
Application number: CN202121377726.9U
Authority: CN
Inventors: 余长柏; 古亚敏; 刘晓波; 常永忠; 肖平
Original assignee: Kingdream PLC; Sinopec Oilfield Equipment Corp
Current assignee: Sinopec Oilfield Equipment Corp
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-02-01
Anticipated expiration: 2031-06-21

Abstract

The utility model provides an eccentric turbine hydraulic oscillator, which belongs to the field of petroleum and natural gas downhole tools and comprises a pipe body, wherein an eccentric turbine is arranged in the pipe body, a sliding sleeve structure capable of rotating relatively is formed between the outer wall of the eccentric turbine and the inner wall of the pipe body, the eccentric turbine is provided with an inclined hole which penetrates through the pipe body along the axial direction, an included angle is formed between the inclined hole and the axis of the pipe body, and the inner wall of the inclined hole is provided with a turbine blade. The turbine blade is a plurality of helical blades arranged along the circumference of the inner wall of the inclined hole, and the helical blades are connected with each other in an extending way. By adopting the scheme of the eccentric turbine, one or more drilling tools are connected in series during underground construction, so that the radial vibration of different positions of the drilling tools can be realized, and the problem of underground pressure supporting of the drilling tools is solved. And simple structure, the processing and the assembly of being convenient for realize with low costsly.

Description

Eccentric turbine hydraulic oscillator

Technical Field

The utility model relates to the field of oil and gas downhole tools, in particular to an eccentric turbine hydraulic oscillator.

Background

At present, the drilling of an oil field is developed into a directional well and a horizontal well from a vertical well, a drilling tool is usually tightly attached to a lower side well wall, the friction of the drilling tool on the well wall is overlarge, the drilling efficiency is influenced, and the drilling pressure is difficult to transfer to a drill bit. In order to overcome the defect, the static friction of the drilling tool is changed into dynamic friction by adopting a hydraulic oscillator in the prior art so as to reduce the friction resistance. The conventional hydraulic oscillator generally has three structures, namely 1, a screw motor structure, wherein a screw drives a moving plate to rotate, so that the through-flow section of a hole between the moving plate and a static plate is periodically changed, and vibration is generated. The method has the problems that the pressure consumption is high and generally reaches 3-4 MPa, the service life is generally less than 500 hours, and the price of a screw motor is very high, for example, the structure is similar to that in Chinese patent document CN 205778542U. 2. The jet structure utilizes the vortex cavity to generate vibration and utilizes the periodic variation of a pressure medium to generate high-frequency vibration, but the pressure loss of the scheme is only 0.2-0.3 Mpa, the frequency is high, and the frequency cannot be controlled. Such as the structure in chinese patent document CN 104963624A. 3. The turbine structure is configured to generate vibration by periodically changing a flow cross section of a hole between the rotor and the stator by rotating the rotor by the turbine rotor. The problem that this scheme exists is that, the structure is comparatively complicated, and rotating member is too much, and is with high costs, and the loss is higher, and turbine rotor rotational speed is higher, makes the output frequency of instrument higher, and is difficult to control, and life is also shorter. For example, the structures described in chinese patent documents CN104895517A and CN 104405287A, CN 211648054U. However, various schemes in the prior art have the problems of complex structure and high processing cost, and the existing tools are difficult to completely meet the construction requirements along with the increase of the length of the well.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide an eccentric turbine hydraulic oscillator, which can overcome the problem of underground pressure supporting by a simplified structure, realize radial vibration by lower pressure consumption, reduce the use cost, and realize radial and axial compound vibration in a preferred scheme.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the utility model provides an eccentric turbine hydraulic oscillator, it includes the body, is equipped with eccentric turbine in the body, constitutes the slip cup joint structure that can relatively rotate between eccentric turbine's outer wall and the body inner wall, is equipped with the inclined hole that link up along the axial at eccentric turbine, has the contained angle between the axis of inclined hole and body, and the inner wall of inclined hole is equipped with turbine blade.

In a preferred embodiment, the turbine blade is a plurality of helical blades circumferentially arranged along the inner wall of the inclined hole, and the helical blades are connected with each other in an extending manner.

In a preferred embodiment, the number of the eccentric turbines is multiple, and the multiple eccentric turbines are arranged along the axial direction.

In a preferred scheme, one end of the pipe body close to the downstream is also provided with a limiting step, a fixed valve plate is fixedly arranged at the position of the limiting step, the fixed valve plate is provided with a through hole which is axially communicated with the pipe body, and the through hole is an eccentric hole;

the eccentric turbine is positioned at the upstream of the fixed valve plate and is in contact with the fixed valve plate;

the size of the through-flow section between the eccentric hole and the overflowing hole of the eccentric turbine is periodically changed along with the rotation of the eccentric turbine.

In a preferred scheme, one end of the inclined hole of the eccentric turbine close to the upstream is in a concentric structure with the pipe body, and one end of the inclined hole close to the downstream is in an eccentric structure with the pipe body.

In a preferred embodiment, the turbine blade is located at an end near the upstream;

the end downstream is free of turbine blades.

In the preferable scheme, a guide cylinder is fixedly arranged at the upstream of the eccentric turbine, a guide hole is arranged in the guide cylinder, the guide hole is of an inverted cone structure, the inner diameter of one end close to the upstream is larger, the inner diameter of one end close to the downstream is smaller, and the downstream end face of the guide cylinder is in contact with the end face of the eccentric turbine.

In a preferred scheme, the downstream inner diameter of the diversion hole is smaller than or equal to the upstream inner diameter of the inclined hole.

In the preferred scheme, an end face sealing ring is arranged between the downstream end face of the guide cylinder and the end face of the eccentric turbine;

an outer wall bearing is arranged between the outer wall of the eccentric turbine and the inner wall of the pipe body, and at least two groups of outer wall bearings are arranged along the axial direction;

an end face bearing is arranged between the end face of the eccentric turbine and the end face of the fixed valve plate.

In a preferred scheme, the hydraulic oscillators are connected in series on the drilling tool at intervals.

The utility model provides an eccentric turbine hydraulic oscillator, which is characterized in that one or more eccentric turbines are connected in series on a drilling tool during underground construction by adopting the scheme of the eccentric turbine, so that radial vibration of different positions of the drilling tool can be realized, and the problem of underground pressure of the drilling tool is solved. And simple structure, the processing and the assembly of being convenient for realize with low costsly. In the preferred scheme, the valve group with the variable flow cross section is formed by combining the inclined hole of the eccentric turbine and the fixed valve plate with the eccentric hole, so that composite vibration can be generated, including superimposed radial vibration and axial vibration, and the transmission of vibration waves is facilitated, so that the static friction of a drilling tool in an effect coverage range is converted into dynamic friction, and the transmission of underground drilling pressure is facilitated. The structure is greatly simplified, the pressure loss is low, a plurality of the fixed valve plates can be connected in series on the drilling tool at intervals, so that the vibration effect is fully transmitted to each section of the drilling tool, and in a further preferable scheme, the fixed valve plates with different eccentric distances can be conveniently replaced to adapt to different geological structures, so that the pressure loss and the vibration effect are in the optimal state.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a front view of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 2.

Fig. 4 is a schematic diagram of the vibration curve of the present invention.

In the figure: the device comprises a pipe body 1, an outer cone connector 11, an inner cone connector 12, a limiting step 13, a guide cylinder 2, a guide hole 21, an eccentric turbine 3, a turbine blade 31, an outer wall bearing 32, an end face bearing 33, an end face sealing ring 34, an inclined hole 35, a fixed valve plate 4 and an overflowing hole 41.

Detailed Description

As shown in fig. 1 to 3, an eccentric turbine hydraulic oscillator includes a pipe body 1, an eccentric turbine 3 is arranged in the pipe body 1, a sliding sleeve structure capable of rotating relatively is formed between the outer wall of the eccentric turbine 3 and the inner wall of the pipe body 1, an inclined hole 35 penetrating along the axial direction is arranged on the eccentric turbine 3, an included angle is formed between the inclined hole 35 and the axis of the pipe body 1, and a turbine blade 31 is arranged on the inner wall of the inclined hole 35. From this structure, pass through eccentric turbine 3 when pressure medium, drive eccentric turbine 3 and rotate promptly, because eccentric turbine 3 is eccentric structure, drive whole body 1 and produce radial vibration, connect in series on the drilling tool through the outer cone connector 11 and the interior cone connector 12 at both ends when body 1, then transmit the drilling tool with the mode of transverse wave with the vibration to solve the technical problem of drilling tool backing pressure in the pit.

Preferably, as shown in fig. 3, the turbine blade 31 is a plurality of spiral blades arranged along the circumference of the inner wall of the inclined hole 35, and the spiral blades are connected with each other in an extending manner. Preferably, the turbine blades 31 are three helical blades uniformly arranged along the circumference of the inner wall of the inclined hole 35, each helical blade being spaced apart by 120 ° in the circumference, and the middle portions of each helical blade being connected to each other.

In a preferred embodiment, the eccentric turbines 3 are multiple, and the multiple eccentric turbines are arranged along the axial direction. With this structure, the processing difficulty is reduced, which is not shown in the figure.

In a preferred scheme, a limiting step 13 is further arranged at one end, close to the downstream, of the pipe body 1, in an optional scheme, the limiting step 13 is formed on the inner wall of the pipe body 1 through machining, and in another optional scheme, the limiting step 13 is formed by a collar fixedly installed, for example, in an interference fit or in a threaded fit mode. The position of the limiting step 13 is fixedly provided with a fixed valve plate 4, the fixed valve plate 4 and the inner wall of the pipe body 1 are circumferentially positioned through threads or mutually meshed grooves, and the axial positioning is realized through the limiting step 13; or the end surface of the fixed valve plate 4 and the limiting step 13 are circumferentially positioned through mutually meshed grooves, and the axial positioning is realized through the limiting step 13. The fixed valve plate 4 is provided with an overflowing hole 41 which is axially communicated along the pipe body 1, and the overflowing hole 41 is an eccentric hole;

the eccentric turbine 3 is positioned at the upstream of the fixed valve plate 4, and the eccentric turbine 3 is in sliding contact with the fixed valve plate 4; upstream in this example refers to the left end in fig. 2. From which end the pressure medium enters the body 1.

As shown in fig. 3, the size of the flow cross section between the eccentric bore of the eccentric turbine 3 and the flow passage 41 varies cyclically with the rotation of the eccentric turbine 3. From the change of the through-flow cross section, the pressure medium will generate periodic vibration and transmit the vibration to the drill tool in the form of longitudinal wave, the vibration pattern is shown in fig. 4, the left side in fig. 4 shows the projected change of the eccentric hole at 90 ° from the through-flow hole 41, and the right side shows the superimposed vibration waveform, where T represents a period. The vibration transmission range can be further extended by optimally combining the eccentric vibration of the eccentric turbine 3. Preferably, the eccentricity of the overflowing hole 41 of the fixed valve plate 4 can be adjusted by replacement, so that the fixed valve plate can be adapted to different underground geological conditions, and the optimal effect can be achieved. The optimization effect in this example means that a balance is achieved between the anti-back-pressure effect, the pressure loss and the use cost. Through measurement and calculation, the structure of the utility model is simplified, so the production and manufacturing cost is greatly reduced, the volume is correspondingly reduced, even if a plurality of rotating tools are connected in series, the total pressure consumption and the use cost are lower than those of the screw motor type hydraulic oscillator with better oscillation effect in the prior art.

Preferably, as shown in fig. 2, the inclined hole 35 of the eccentric turbine 3 is concentric with the pipe 1 at the upstream end and eccentric with the pipe 1 at the downstream end. With this structure, it is convenient to cooperate with the guide shell 2 to reduce the axial pressure of the eccentric turbine 3. The eccentric turbine 3 is prevented from being pressed on the fixed valve plate 4 or the limiting step because of overhigh pressure of the pressure medium.

In a preferred embodiment, the turbine blade 31 is located at an end near the upstream; the turbine blade 31 is not provided at the downstream end. By the structure, the eccentric turbine 3 is more conveniently driven to rotate, the eccentric turbine 3 is prevented from being clamped, and the design can enable the variation range of the through-flow section to be larger under the same pipe body diameter.

In a preferred scheme, as shown in fig. 2, a guide shell 2 is fixedly arranged at the upstream of an eccentric turbine 3, a guide hole 21 is arranged in the guide shell 2, the guide hole 21 is of an inverted cone structure, the inner diameter of one end close to the upstream is larger, the inner diameter of one end close to the downstream is smaller, and the downstream end face of the guide shell 2 is in sealing sliding contact with the end face of the eccentric turbine 3. Upstream refers to the left end in fig. 2, and downstream refers to the right end in fig. 2. In a preferable scheme, the downstream inner diameter of the diversion hole 21 is smaller than or equal to the upstream inner diameter of the inclined hole 35. The guide shell 2 has the function of reducing the axial pressure of the eccentric turbine 3. And secondly, the flow velocity of the pressure medium is improved, so that the pressure medium can better do work on the turbine blades 31 to drive the eccentric turbine 3 to rotate. In a further preferred scheme, a conical guide cap is arranged at the downstream central position of the guide cylinder 2, and the tip of the guide cap is aligned with the upstream so that the pressure medium acts on the position of the root of the turbine blade 31 more. The structure of the deflector cap is not shown in the figures.

Preferably, as shown in fig. 2, an end face seal ring 34 is arranged between the downstream end face of the guide shell 2 and the end face of the eccentric turbine 3; since the eccentric turbine 3 is mainly subjected to pressure from left to right in fig. 2, the sealing ring 34 is provided there to form a seal and compensate for the change in clearance due to axial play of the eccentric turbine 3.

An outer wall bearing 32 is arranged between the outer wall of the eccentric turbine 3 and the inner wall of the pipe body 1, and at least two groups of the outer wall bearings 32 are arranged along the axial direction; the outer wall bearing 32 in this example is preferably a teflon plain bearing. The outer wall bearing 32 is configured as an annular inlay or a plurality of columnar inlays. It is also possible to use ball bearings.

An end face bearing 33 is arranged between the end face of the eccentric turbine 3 and the end face of the fixed valve plate 4 to bear the axial pressure of the eccentric turbine 3. The end face bearing 33 is preferably a teflon plain bearing. It is also possible to use ball bearings.

In a preferred scheme, the hydraulic oscillators are connected in series on the drilling tool at intervals. The utility model has the advantages of simple structure, low price and low pressure consumption, can be connected in series on a drilling tool, and is particularly suitable for long horizontal well drilling operation.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. An eccentric turbine hydraulic oscillator, which is characterized in that: it includes body (1), is equipped with eccentric turbine (3) in body (1), constitutes rotatable slip cup joint structure relatively between the outer wall of eccentric turbine (3) and body (1) inner wall, is equipped with along axially through-going inclined hole (35) at eccentric turbine (3), has the contained angle between the axis of inclined hole (35) and body (1), and the inner wall of inclined hole (35) is equipped with turbine blade (31).

2. The eccentric turbine hydroscillator of claim 1 wherein: the turbine blade (31) is a plurality of helical blades arranged along the circumference of the inner wall of the inclined hole (35), and the helical blades are connected with each other in an extending way.

3. The eccentric turbine hydroscillator of claim 1 wherein: the eccentric turbines (3) are multiple and are arranged along the axial direction.

4. The eccentric turbine hydroscillator of claim 1 wherein: a limiting step (13) is further arranged at one end, close to the downstream, of the pipe body (1), a fixed valve plate (4) is fixedly arranged at the position of the limiting step (13), a through hole (41) which penetrates through the pipe body (1) in the axial direction is formed in the fixed valve plate (4), and the through hole (41) is an eccentric hole;

the eccentric turbine (3) is positioned at the upstream of the fixed valve plate (4), and the eccentric turbine (3) is in contact with the fixed valve plate (4);

the size of the through-flow section between the eccentric hole of the eccentric turbine (3) and the overflowing hole (41) changes periodically along with the rotation of the eccentric turbine (3).

5. An eccentric turbine hydroscillator as defined in any of claims 1, 2 or 4 wherein: the end of the inclined hole (35) of the eccentric turbine (3) close to the upstream is concentric with the pipe body (1), and the end close to the downstream is eccentric with the pipe body (1).

6. The eccentric turbine hydroscillator of claim 5 wherein: the turbine blade (31) is positioned at one end close to the upstream;

the turbine blade (31) is not provided at the downstream end.

7. The eccentric turbine hydroscillator of claim 5 wherein: the upper stream of the eccentric turbine (3) is also fixedly provided with a guide shell (2), a guide hole (21) is arranged in the guide shell (2), the guide hole (21) is of an inverted cone structure, the inner diameter of one end close to the upper stream is larger, the inner diameter of one end close to the lower stream is smaller, and the lower stream end face of the guide shell (2) is in contact with the end face of the eccentric turbine (3).

8. The eccentric turbine hydroscillator of claim 7 wherein: the inner diameter of the downstream of the diversion hole (21) is smaller than or equal to the inner diameter of the upstream of the inclined hole (35).

9. The eccentric turbine hydroscillator of claim 7 wherein: an end face sealing ring (34) is arranged between the downstream end face of the guide cylinder (2) and the end face of the eccentric turbine (3);

an outer wall bearing (32) is arranged between the outer wall of the eccentric turbine (3) and the inner wall of the pipe body (1), and at least two groups of outer wall bearings (32) are arranged along the axial direction;

an end face bearing (33) is arranged between the end face of the eccentric turbine (3) and the end face of the fixed valve plate (4).

10. An eccentric turbine hydraulic oscillator according to any one of claims 1 to 4 and 6 to 9, wherein: the hydraulic oscillators are connected in series on the drilling tool at intervals.