CN111852370A - a hydraulic vibrator - Google Patents

Abstract

The invention discloses a hydraulic vibrator which comprises an upper joint, a stator pipe fitting and a lower joint which are sequentially connected, wherein the end part of the upper joint connected with the stator pipe fitting is sleeved in the stator pipe fitting, the end part of the lower joint connected with the stator pipe fitting is sleeved in the stator pipe fitting, a rotor mounting part is fixedly arranged at the end part of the stator pipe fitting, which is close to the upper joint, a wavy rotor is rotatably arranged on the rotor mounting part, a valve seat is fixedly arranged at the end part of the lower joint, which is close to the stator pipe fitting, and a valve plate and a motor are arranged on the valve seat. The invention has the advantages that: the drilling requirements of a vertical well, a horizontal well and a directional well can be met, the timeliness of the drilling process can be maximized, and the problem of frictional resistance in drilling is effectively solved.

Description

a hydraulic vibrator

technical field

The invention relates to the technical field of drilling equipment, in particular to a hydraulic vibrator.

Background technique

During the pressurization process, the drilling tools are brought close to the lateral well wall during the horizontal drilling process, resulting in excessive friction of the drilling tools during the drilling process, seriously affecting the drilling, and even causing the drilling tools to be decompressed and unable to be pressurized. to the drill. Reducing friction, reducing sticking accidents in conventional drilling, increasing dynamic WOB, and improving the efficiency of conventional drilling are the urgent problems to be solved in current drilling engineering.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems mentioned in the background art and provide a hydraulic vibrator.

In order to solve the above technical problems, the technical solution provided by the present invention is: a hydraulic vibrator, comprising an upper joint, a stator pipe fitting and a lower joint which are connected and arranged in sequence, and the end of the upper joint connected with the stator pipe fitting is sleeved In the stator tube, the end of the lower joint connected to the stator tube is sleeved in the stator tube, and the end of the stator tube close to the upper joint is fixedly provided with a rotor mounting member, A wave-shaped rotor is rotatably mounted on the rotor mounting piece, a valve seat is fixedly arranged on the end of the lower joint close to the stator pipe piece, and a valve plate and a motor are arranged on the valve seat.

As a preferred solution, the inside of the upper joint is provided with a circular truncated groove and an upper joint cylindrical groove, the upper joint cylindrical groove communicates with the stator pipe, and the lower joint is provided with a lower joint cylindrical groove.

As a preferred solution, the inner diameter of the cylindrical groove of the upper joint and the cylindrical groove of the lower joint are the same.

As a preferred solution, the central axes of the cylindrical groove of the upper joint and the cylindrical groove of the lower joint are on a straight line.

As a preferred solution, the end of the lower joint away from the stator tube is provided with a circular truncated protrusion that matches the shape of the circular truncated groove.

Compared with the prior art, the advantage of the present invention is that: by applying the present invention, the pressure of the mud can be changed, thereby causing the drilling tool to oscillate regularly, so that the drilling tool oscillates during the drilling process, so as to reduce the drilling tool The resistance in the drilling process, and then the effect of increasing the ROP solves the problem of drilling efficiency in the process of oil and gas drilling, and reduces the frictional resistance between the drill string and the well wall, which can meet the requirements of vertical wells, horizontal wells and directional wells. Drilling needs, so that the timeliness of the drilling process can be maximized, and the problem of frictional resistance in drilling can be effectively solved.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

As shown in the picture: 1. Upper joint, 2. Stator pipe fitting, 3. Lower joint, 4. Rotor mounting piece, 5. Rotor, 6. Valve seat, 7. Valve plate, 8. Motor, 9. Truncated groove, 10 , The upper joint cylindrical groove, 11, the lower joint cylindrical groove, 12, the round table convex.

Detailed ways

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore It should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings.

Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

With reference to the drawings, a hydraulic vibrator includes an upper joint 1, a stator pipe 2 and a lower joint 3 which are connected in sequence, and the end of the upper joint 1 connected to the stator pipe 2 is sleeved on the stator pipe 2, the end of the lower joint 3 connected to the stator pipe piece 2 is sleeved in the stator pipe piece 2, and the end of the stator pipe piece 2 close to the upper joint 1 is fixedly provided with a rotor mounting piece 4. A wave-shaped rotor 5 is rotatably mounted on the rotor mounting piece 4 , a valve seat 6 is fixedly arranged at the end of the lower joint 3 close to the stator pipe piece 2 , and a valve plate is arranged on the valve seat 6 7 and motor 8.

The inside of the upper joint 1 is provided with a circular truncated groove 9 and an upper joint cylindrical groove 10, the upper joint cylindrical groove 10 is communicated with the stator pipe 2, and the lower joint 3 is provided with a lower joint cylindrical groove 11. . The inner diameters of the upper joint cylindrical groove 10 and the lower joint cylindrical groove 11 are the same. The central axes of the upper joint cylindrical groove 10 and the lower joint cylindrical groove 11 are on a straight line. The end of the lower joint 3 away from the stator tube 2 is provided with a circular truncated protrusion 12 that matches the shape of the circular truncated groove 9 .

The working principle of the present invention is as follows: 1-2 motors are installed inside the stator pipe, hydraulic pulses are provided to the valve plate through the motor, and the rotor is driven by the hydraulic pulse to form the reciprocating motion of the short joint, and the rotor is designed as a wear-resistant sleeve inside the stator pipe The structure combined with the fixed valve plate, the advantage of this structure is that the connection is simple, the cooperation is tight during work, and the fluid flows through the short section of the rotor, which will produce periodic pressure difference changes, which will eventually cause axial vibration and achieve hydraulic vibration. Purpose. This design method optimizes the internal structure, the design and connection of each matching mechanism are less difficult, the reliability is high in the actual use process, and it is not easily affected by the external environment. Considering the large frictional resistance between the drill string and the well wall during the drilling process, the vibration of the drill string can reduce the contact surface between the drill string and the well wall, thereby achieving the purpose of reducing frictional resistance.

The main technical indicators of the present invention include: diameter size range, working flow, vibrating force, maximum working pressure drop, and vibration frequency parameters as shown in Table 1. The functional parameters and connecting threads of some vibrators vary according to the needs of the drilling site.

Table 1 Technical performance parameter table of hydraulic vibrator

The technical instructions for use are as follows:

1. Determination of the placement position: The hydraulic vibrator works by the vibration of the main motor to reduce the axial frictional resistance and radial frictional torque of the downhole drill string, and is located on the drill bit, the screw drilling tool and the MWD. The placement position of the hydraulic vibrator is related to factors such as the radius of curvature of the wellbore, the drill string combination structure, and the expected length of the horizontal section. There are two combination methods:

1) Split type: axial vibrator (1D) + X1 drill pipe + X2 drill pipe + (MWD + screw drilling tool + drill bit);

2) Integral type: axial vibrator (1D)++X2 drill rods+(MWD+screw drilling tool+drill bit).

How to choose the placement location and combination method depends on the design and consideration of the drilling process in advance. The specific recommended methods are as follows: 1) Integral layout is adopted; 2) If the inclination angle of the well is less than or equal to 45°, the vibrator should be placed at a distance of about 80-150 meters from the drill bit; 3) If the inclination angle of the well is 45-80°, the vibration The placement position of the vibrator should be about 60-100 meters away from the drill bit; 4) For horizontal wells, the inclination angle = 80-90°, and the horizontal section is greater than 1200 meters, two vibrators can be arranged, and the first placement position is at a distance from the drill bit. 60-100 meters, the other is placed at a distance of 1000 meters from the drill.

2. Requirements before leaving the factory: Before leaving the factory, the hydraulic vibrator should be divided into axial vibrators (1-dimensional), independently assembled, and the connecting threads should be buckled according to regulations.

3. Preparations before going down: 1) Prepare the mating joints or adapters of the drilling tools; 2) Know the basic situation of the well before the tools are inserted into the well: including: drilling rig performance, current formation, well depth, the situation of the bit used in the upper part of the well section, mechanical Drilling speed, whether there are complex conditions, mud parameters, mud cleaning; 3) The working displacement of the vibrator is the same as the displacement of normal drilling; but in the trial operation, it can be gradually increased from small to large, and finally increased 4) At the initial startup, the pump pressure is generally relatively high (about 3.3-6.5MPa of vertical pressure consumption); after 1-2 minutes, when the vibrator is running normally, the pump pressure will drop; 5) During the test run, observe the amplitude of the axial vibration of the vibrator and the corresponding frequency change.

4. Connecting tools and drilling down: On the drilling floor, according to the pre-designed requirements, connect and fasten the vibrator and the corresponding drilling tool assembly; the operation of drilling down is the same as that of conventional drilling; the distance from the bottom of the well is 10-20 Open the pump to prevent the drill bit from directly contacting the bottom of the well or the sediment at the bottom of the well to prevent the water hole from being blocked; after the end, check the pump pressure and displacement to see if it is normal. Before the abnormality is eliminated, it is forbidden to contact the bottom of the well for drilling.

5. Drilling: Make sure the displacement and pump pressure are normal, and then start to contact the bottom of the well; use normal drilling parameters. The operation of the brake handle is stable, preventing stagnation and slippage, and evenly feeding the drill; according to the speed of drilling, timely observe and judge the condition of the tool and drill bit; observe and record various drilling parameters, and it is easy to compare if there is an abnormal situation; when the ROP continuously slows down , first to determine whether the formation is the cause. If the ROP gradually decreases, judge the conditions of the downhole tools and drill bits, make timely judgments, and start drilling in time. Pay close attention to the change of pump pressure. When the pump pressure suddenly rises sharply, stop drilling to check whether the vibrator is suffocated.

6. Trip out: remove the vibrator from the drill string and place it separately; contact the manufacturer or technical service personnel in time to inspect or repair the vibrator.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification. The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (5)

1. A hydraulic vibrator, characterized by: including top connection, stator pipe fitting and the lower clutch that connects gradually the setting, the top connection with the tip that the stator pipe fitting is connected cup joints in the stator pipe fitting, the lower clutch with the tip that the stator pipe fitting is connected cup joints in the stator pipe fitting, be close to in the stator pipe fitting the end fixing of top connection is provided with the rotor installed part, install wavy rotor on the rotor installed part, the lower clutch is close to the end fixing of stator pipe fitting is provided with the disk seat, be provided with valve plate and motor on the disk seat.

2. The hydraulic vibrator according to claim 1, wherein: the inner part of the upper joint is provided with a circular platform groove and an upper joint cylindrical groove which are communicated, the upper joint cylindrical groove is communicated with the stator pipe fitting, and a lower joint cylindrical groove is arranged in the lower joint.

3. A hydraulic vibrator according to claim 2, characterized in that: the inner diameters of the upper joint cylindrical groove and the lower joint cylindrical groove are the same.

4. A hydraulic vibrator according to claim 3, characterized in that: the central axes of the upper joint cylindrical groove and the lower joint cylindrical groove are on the same straight line.

5. A hydraulic vibrator according to any one of claims 2-4, characterized by: the end part of the lower joint far away from the stator pipe fitting is provided with a circular truncated cone bulge matched with the circular truncated cone groove in shape.

Images