阅读说明：本技术 一种高温盐井定向井对接导航输送系统及应用方法 (Directional well butt-joint navigation conveying system for high-temperature salt well and application method ) 是由 李忠君 刘明军 张光敏 陈友亮 赵中华 李明亮 任伟 于 2020-06-04 设计创作，主要内容包括：本发明属于高温盐井定向井对接技术领域,尤其涉及一种高温盐井定向井对接导航输送系统及应用方法。该高温盐井定向井对接导航输送系统,包括定向井、钻机、钻杆柱、无磁钻铤、导航输送装置、高温盐井溶腔、磁导向对接仪器、电缆和绞车,所述定向井井口安装钻机,所述定向井内部设置有钻杆柱,所述钻杆柱上端连接钻机,所述钻杆柱下端的无磁钻铤连接导航输送装置,所述导航输送装置放置在高温盐井溶腔中心位置。为了能使磁导向对接仪器安全下入和起出高温盐井溶腔来提高施工安全稳定性,能使对接仪器位于高温盐井溶腔中心位置来确保接收对接信号准确性,本发明提供一种高温盐井定向井对接导航输送系统及应用方法。(The invention belongs to the technical field of butt joint of directional wells of high-temperature salt wells, and particularly relates to a butt joint navigation conveying system of a directional well of a high-temperature salt well and an application method. This directional well butt joint navigation conveying system of high temperature salt well, including directional well, rig, drill rod string, no magnetism drill collar, navigation conveyor, high temperature salt well molten cavity, magnetic steering butt joint instrument, cable and winch, directional well wellhead installation rig, directional well inside is provided with the drill rod string, the rig is connected to drill rod string upper end, navigation conveyor is connected to the no magnetism drill collar of drill rod string lower extreme, navigation conveyor places in high temperature salt well molten cavity central point and puts. The invention provides a high-temperature salt well directional well butt-joint navigation conveying system and an application method thereof, aiming at enabling a magnetic steering butt-joint instrument to be safely put into and taken out of a high-temperature salt well dissolution cavity to improve the construction safety and stability and enabling the butt-joint instrument to be located at the center of the high-temperature salt well dissolution cavity to ensure the accuracy of receiving butt-joint signals.)

1. The utility model provides a directional well butt joint navigation conveying system of high temperature salt well which characterized in that: the directional well mouth is provided with the drilling machine, the drilling rod column is arranged in the directional well, the upper end of the drilling rod column is connected with the drilling machine, the non-magnetic drilling collar at the lower end of the drilling rod column is connected with the navigation conveying device, the navigation conveying device is placed at the central position of the high-temperature salt well dissolving cavity, the magnetic guidance butt joint instrument in the navigation conveying device is connected with the lower end of the cable, and the upper end of the cable sequentially penetrates through the non-magnetic drilling collar and the drilling rod column to be connected with the winch;

navigation conveyor is from last to having set gradually down to sit and hanging assembly, unidirectional flow assembly and lead oblique assembly, sit and hang the nonmagnetic drill collar of assembly upper portion connection drilling rod column lower extreme, sit and hang assembly internally mounted and sit and hang the sleeve, sit and hang and place magnetic guide butt joint instrument in the sleeve, sit and hang the assembly cavity and communicate with each other with unidirectional flow assembly cavity, unidirectional flow assembly cavity with lead and be provided with the baffle between the oblique assembly cavity, it has the through-hole to open on the baffle, the baffle mid-mounting has spring back pressure sleeve just spring back pressure sleeve is located unidirectional flow assembly cavity, it has the jet orifice to lead oblique assembly lower part to open.

2. The system according to claim 1, wherein: through holes are symmetrically formed in the partition plates on the left side and the right side of the spring back pressure sleeve.

3. The system according to claim 1, wherein: the lower end of the oblique guide assembly is in a conical shape, and hard wear-resistant alloy blocks are uniformly embedded in the outer surface of the oblique guide assembly.

4. The system according to claim 1, wherein: the upper portion of the sitting and hanging assembly is provided with a threaded female buckle, the upper portion of the sitting and hanging assembly is connected with a non-magnetic drill collar at the lower end of a drill string through the female buckle in a threaded mode, and a sitting and hanging sleeve is installed inside the sitting and hanging assembly through a jackscrew.

5. The system according to claim 1, wherein: lead oblique assembly from down supreme equidistant three injection hole group that is provided with, injection hole group all includes four evenly distributed's injection hole.

6. The application method of the high-temperature salt well directional well butt-joint navigation conveying system in claim 1 is characterized in that: the method comprises the following steps:

step 1, connecting the upper end of a drill rod column with a drilling machine, and connecting a non-magnetic drill collar at the lower end of the drill rod column with a navigation conveying device;

step 2, starting a drilling machine, and putting the drill string, the non-magnetic drill collar and the navigation conveying device into the directional well, if the navigation conveying device is blocked in the putting process, executing step 21, and if the navigation conveying device is smooth in the putting process, executing step 3;

step 3, adjusting the lengths of the drill rod column and the non-magnetic drill collar to enable the navigation conveying device to be located at the center of the high-temperature salt well dissolving cavity; the drilling machine pumps saturated saline water, the saturated saline water enters a sitting and hanging assembly cavity of the navigation conveying device along inner holes of the drill column and the non-magnetic drill collar, the pressure of the saturated saline water in the sitting and hanging assembly cavity enables a spring of a spring back pressure sleeve in the unidirectional flow assembly to contract, the unidirectional flow assembly cavity is opened, the saturated saline water in the sitting and hanging assembly cavity enters the unidirectional flow assembly cavity, the saturated saline water in the unidirectional flow assembly cavity enters the deflection guiding assembly cavity through a through hole in the partition plate and is sprayed out through a spray hole in the lower portion of the deflection guiding assembly, and impurities in the drill column, the non-magnetic drill collar and the navigation conveying device are discharged; stopping pumping saturated brine when the drilling machine is closed, and enabling the pressure of the saturated brine in the cavity of the sitting and hanging assembly to disappear so that the spring of the spring back pressure sleeve in the unidirectional flow assembly is expanded and the cavity of the unidirectional flow assembly is closed;

step 4, starting a winch, conveying the magnetic steering butt-joint instrument to a hanging assembly of the navigation conveying device along the drill string and the inner hole of the non-magnetic drill collar by using a cable on the winch, and closing the winch;

step 5, the magnetic guiding butt joint instrument sends out magnetic line signals according to the strong magnetic joint in the horizontal well to guide a drill bit in the horizontal well to drill until the horizontal well is successfully communicated with the directional well;

step 6, starting a winch, pulling out the magnetic steering butt joint instrument from the seating and hanging assembly of the navigation conveying device along the drill string and the inner hole of the non-magnetic drill collar by the cable on the winch, and closing the winch;

and 7, starting the drilling machine, taking out the drill rod column, the non-magnetic drill collar and the navigation conveying device from the directional well, and closing the drilling machine.

7. The application method of the high-temperature salt well directional well butt-joint navigation conveying system according to claim 6, characterized in that:

step 21, pumping saturated saline water into a drilling machine, enabling the saturated saline water to enter a sitting and hanging assembly cavity of the navigation conveying device along inner holes of a drill column and a non-magnetic drill collar, enabling the pressure of the saturated saline water in the sitting and hanging assembly cavity to enable a spring of a spring back pressure sleeve in a unidirectional flow assembly to contract, opening the unidirectional flow assembly cavity, enabling the saturated saline water in the sitting and hanging assembly cavity to enter the unidirectional flow assembly cavity, enabling the saturated saline water in the unidirectional flow assembly cavity to enter a guide slope assembly cavity through a through hole in a partition plate, enabling the saturated saline water to be sprayed out through a spray hole in the lower portion of the guide slope assembly, enabling the saturated saline water sprayed out through the spray hole to generate water conservancy impact to break rock debris and drop blocks encountered, and discharging the rock debris and the blocks out of a directional well, if the navigation conveying device still encounters resistance in the descending process.

8. The application method of the high-temperature salt well directional well butt-joint navigation conveying system according to claim 7, characterized in that:

and 22, enabling the drill column and the non-magnetic drill collar to rotate at a low speed by the drilling machine to drive the navigation conveying device to rotate to pull out the blocked rock debris and the fallen blocks, gradually increasing the rotating speed of the drill column and the non-magnetic drill collar by the drilling machine to drive the hard wear-resistant alloy blocks on the surface of the deflection guiding assembly of the navigation conveying device to rotate at a high speed to crush the rock debris and fall the blocks, discharging the rock debris and the fallen blocks out of the directional well, and continuously executing the step 3.

9. The application method of the high-temperature salt well directional well butt-joint navigation conveying system according to claim 6, characterized in that:

step 1, connecting the upper end of a drill string with a drilling machine, and connecting a non-magnetic drill collar at the lower end of the drill string with a navigation conveying device, further comprising connecting the upper end of the drill string with the drilling machine, and connecting the non-magnetic drill collar at the lower end of the drill string with a female buckle on a seating and hanging assembly of the navigation conveying device in a threaded manner.

10. The application method of the high-temperature salt well directional well butt-joint navigation conveying system according to claim 6, characterized in that:

step 3, adjusting the lengths of the drill column and the non-magnetic drill collar to enable the navigation conveying device to be positioned at the central position of the high-temperature salt well dissolving cavity, further comprising the steps of adjusting the lengths of the drill column and the non-magnetic drill collar to enable the navigation conveying device to be positioned at the central position of the high-temperature salt well dissolving cavity, pumping saturated saline by a drilling machine if the high-temperature salt well salt layer collapses, enabling the saturated saline to enter a sitting and hanging assembly cavity of the navigation conveying device along inner holes of the drill column and the non-magnetic drill collar, enabling a spring of a spring back pressure sleeve in the unidirectional flow assembly to contract under the pressure of the saturated saline in the sitting and hanging assembly cavity, opening the unidirectional flow assembly cavity, enabling the saturated saline in the sitting and hanging assembly cavity to enter the unidirectional flow assembly cavity, enabling the saturated saline in the unidirectional flow assembly cavity to enter the deflecting assembly cavity through a through hole in the partition plate and to be sprayed out through a spray hole in the lower part of the, and is discharged from the wellhead of the high-temperature salt well.

Technical Field

The invention belongs to the technical field of butt joint of directional wells of high-temperature salt wells, and particularly relates to a butt joint navigation conveying system of a directional well of a high-temperature salt well and an application method.

Background

With the development of chemical industry in China, the demand for chemical raw materials such as polyvinyl chloride, caustic soda, hydrochloric acid and the like is greatly increased, and the salt mine is promoted to develop vigorously. At present, salt mine exploitation mainly adopts a water dissolution mode for exploitation, namely a horizontal well and a vertical well, after the horizontal well is communicated with the vertical well, saturated saline water is injected from the horizontal well, brine is extracted from the vertical well, and the problems of high cost, large land occupation, inconvenience in management and the like are caused.

After a vertical well is changed into a directional well, some problems occur in the construction process of communicating two wells, how to safely lower a communication probe to a predetermined position and smoothly take out the communication probe, and ensure the accuracy of communication data? At present, the probe tube is mainly conveyed to a preset position by a cable in a direct conveying mode. The mode of horizontal well and vertical well can be easily realized under the action of gravity, but the mode of horizontal well and directional well has the following problems:

1. the instrument is light in weight, is easy to block in an inclined shaft section and cannot reach a preset dissolving cavity; 2. the directional well forms irregular dissolved cavities in the salt layer by dissolving water for cave-making, the top of the target salt layer always has a small salt layer, and a cave is also formed when the water dissolves for cave-making; non-salt interlayers often exist in the target salt layer, and when water is dissolved to make pits, the interlayers cannot be dissolved to form a suspended layer, and the communicating probe tube can be blocked in the places through the own weight; 3. the directional well has a certain inclination, even if the communicating instrument can smoothly enter the target dissolving cavity, the instrument is in a suspension state in the dissolving cavity under the influence of gravity and is positioned at the bottom of the dissolving cavity, and cannot be centered, so that the communicating data are deviated; the instrument is also hung and clamped when the instrument is ready to be lifted out, so that the instrument falls into a well; 4. the target layer of the high-temperature salt well is often deep, crystallization or solid accumulation is easy to occur, and the pump cannot be started for circulation when the connected instrument is difficult to put into the well or is blocked; 5. if the instrument collapses in the cavity, the butt joint instrument is easily buried in the cavity to cause accidents.

Disclosure of Invention

The invention mainly aims to solve the problems in the prior art, and provides a butt-joint navigation conveying system for a directional well of a high-temperature salt well and an application method thereof in order to enable a magnetic guide butt-joint instrument to be safely put into and taken out of a dissolution cavity of the high-temperature salt well to improve the construction safety and stability and enable the butt-joint instrument to be positioned at the center of the dissolution cavity of the high-temperature salt well to ensure the accuracy of receiving butt-joint signals.

The technical problem solved by the invention is realized by adopting the following technical scheme: a high-temperature salt well directional well butt-joint navigation conveying system comprises a directional well, a drilling machine, a drill rod column, a non-magnetic drill collar, a navigation conveying device, a high-temperature salt well dissolving cavity, a magnetic guide butt-joint instrument, a cable and a winch, wherein the drilling machine is installed at the well mouth of the directional well, the drill rod column is arranged inside the directional well, the drilling machine is connected to the upper end of the drill rod column, the non-magnetic drill collar at the lower end of the drill rod column is connected with the navigation conveying device, the navigation conveying device is placed in the center of the high-temperature salt well dissolving cavity, the magnetic guide butt-joint instrument in the navigation conveying device is connected with the lower end of the cable, and the upper end of the cable sequentially penetrates through the;

navigation conveyor is from last to having set gradually down to sit and hanging assembly, unidirectional flow assembly and lead oblique assembly, sit and hang the nonmagnetic drill collar of assembly upper portion connection drilling rod column lower extreme, sit and hang assembly internally mounted and sit and hang the sleeve, sit and hang and place magnetic guide butt joint instrument in the sleeve, sit and hang the assembly cavity and communicate with each other with unidirectional flow assembly cavity, unidirectional flow assembly cavity with lead and be provided with the baffle between the oblique assembly cavity, it has the through-hole to open on the baffle, the baffle mid-mounting has spring back pressure sleeve just spring back pressure sleeve is located unidirectional flow assembly cavity, it has the jet orifice to lead oblique assembly lower part to open.

Furthermore, through holes are symmetrically formed in the partition plates on the left side and the right side of the spring back pressure sleeve.

Furthermore, lead oblique assembly lower extreme and be the cone shape, lead oblique assembly external surface and evenly inlay and have the hard wear-resisting alloy piece.

Further, a threaded female buckle is arranged on the upper portion of the sitting and hanging assembly, the upper portion of the sitting and hanging assembly is connected with a non-magnetic drill collar at the lower end of a drill string through the female buckle in a threaded mode, and a sitting and hanging sleeve is installed inside the sitting and hanging assembly through a jackscrew.

Further, lead oblique assembly from the supreme equidistant three injection hole group that is provided with down, the injection hole group all includes four evenly distributed's injection hole.

The application method of the high-temperature salt well directional well butt-joint navigation conveying system comprises the following steps:

step 1, connecting the upper end of a drill rod column with a drilling machine, and connecting a non-magnetic drill collar at the lower end of the drill rod column with a navigation conveying device;

step 2, starting a drilling machine, and putting the drill string, the non-magnetic drill collar and the navigation conveying device into the directional well, if the navigation conveying device is blocked in the putting process, executing step 21, and if the navigation conveying device is smooth in the putting process, executing step 3;

step 3, adjusting the lengths of the drill rod column and the non-magnetic drill collar to enable the navigation conveying device to be located at the center of the high-temperature salt well dissolving cavity; the drilling machine pumps saturated saline water, the saturated saline water enters a sitting and hanging assembly cavity of the navigation conveying device along inner holes of the drill column and the non-magnetic drill collar, the pressure of the saturated saline water in the sitting and hanging assembly cavity enables a spring of a spring back pressure sleeve in the unidirectional flow assembly to contract, the unidirectional flow assembly cavity is opened, the saturated saline water in the sitting and hanging assembly cavity enters the unidirectional flow assembly cavity, the saturated saline water in the unidirectional flow assembly cavity enters the deflection guiding assembly cavity through a through hole in the partition plate and is sprayed out through a spray hole in the lower portion of the deflection guiding assembly, and impurities in the drill column, the non-magnetic drill collar and the navigation conveying device are discharged; stopping pumping saturated brine when the drilling machine is closed, and enabling the pressure of the saturated brine in the cavity of the sitting and hanging assembly to disappear so that the spring of the spring back pressure sleeve in the unidirectional flow assembly is expanded and the cavity of the unidirectional flow assembly is closed;

step 4, starting a winch, conveying the magnetic steering butt-joint instrument to a hanging assembly of the navigation conveying device along the drill string and the inner hole of the non-magnetic drill collar by using a cable on the winch, and closing the winch;

step 5, the magnetic guiding butt joint instrument sends out magnetic line signals according to the strong magnetic joint in the horizontal well to guide a drill bit in the horizontal well to drill until the horizontal well is successfully communicated with the directional well;

step 6, starting a winch, pulling out the magnetic steering butt joint instrument from the seating and hanging assembly of the navigation conveying device along the drill string and the inner hole of the non-magnetic drill collar by the cable on the winch, and closing the winch;

and 7, starting the drilling machine, taking out the drill rod column, the non-magnetic drill collar and the navigation conveying device from the directional well, and closing the drilling machine.

And step 21, pumping saturated saline water into a drilling machine, enabling the saturated saline water to enter a sitting and hanging assembly cavity of the navigation conveying device along inner holes of a drill column and a non-magnetic drill collar, enabling the pressure of the saturated saline water in the sitting and hanging assembly cavity to enable a spring of a spring back pressure sleeve in a unidirectional flow assembly to contract, opening the unidirectional flow assembly cavity, enabling the saturated saline water in the sitting and hanging assembly cavity to enter the unidirectional flow assembly cavity, enabling the saturated saline water in the unidirectional flow assembly cavity to enter a slope guiding assembly cavity through a through hole in a partition plate and to be sprayed out through a spray hole in the lower portion of the slope guiding assembly, enabling the spray hole to spray the saturated saline water to generate water conservancy impact to break detritus and fall blocks meeting resistance and discharge the detritus and the blocks out of a directional well, executing step 22 if the navigation conveying device is still meeting resistance in the descending process, and.

And step 22, the drilling machine rotates the drill column and the non-magnetic drill collar at a low speed to drive the navigation conveying device to rotate to pull out the blocked rock debris and the dropped rock debris, the drilling machine gradually increases the rotation speed of the drill column and the non-magnetic drill collar to drive the hard wear-resistant alloy blocks on the surface of the deflection assembly of the navigation conveying device to rotate at a high speed to crush the rock debris and drop the rock debris and discharge the rock debris out of the directional well, and the step 3 is continuously executed.

And step 1, connecting the upper end of the drill column with a drilling machine, and connecting the non-magnetic drill collar at the lower end of the drill column with the navigation conveying device.

Step 3, adjusting the lengths of the drill column and the non-magnetic drill collar to enable the navigation conveying device to be located at the central position of the high-temperature salt well dissolving cavity, further comprising the steps of adjusting the lengths of the drill column and the non-magnetic drill collar to enable the navigation conveying device to be located at the central position of the high-temperature salt well dissolving cavity, pumping saturated saline into a seating and hanging assembly cavity of the navigation conveying device by a drilling machine if a high-temperature salt well salt layer collapses, enabling the saturated saline to enter the seating and hanging assembly cavity of the navigation conveying device along inner holes of the drill column and the non-magnetic drill collar, enabling a spring of a spring back-pressure sleeve in the unidirectional flow assembly to contract under the pressure of the saturated saline in the seating and hanging assembly cavity to be opened, enabling the saturated saline in the seating and hanging assembly cavity to enter the unidirectional flow assembly cavity, enabling the saturated saline in the unidirectional flow assembly cavity to enter the deflecting assembly cavity through a through hole in the partition plate and to be sprayed out through a, and is discharged from the wellhead of the high-temperature salt well.

The invention has the beneficial effects that:

1. the non-magnetic drill collar at the lower end of the drill column is connected with the navigation conveying device, the navigation conveying device is placed in the center of the high-temperature salt well dissolving cavity, the magnetic guide butt-joint instrument is placed in a hanging sleeve of a hanging assembly on the navigation conveying device, therefore, the upper portion of the navigation conveying device is rigidly supported by the drill column and the non-magnetic drill collar and is located in the center of the high-temperature salt well dissolving cavity, the magnetic guide butt-joint instrument is placed in the hanging assembly and is also located in the center of the high-temperature salt well dissolving cavity, so that the accuracy of receiving butt-joint signals is high, and the magnetic guide butt-joint instrument in the hanging assembly is extremely small in external vibration due to the fact that the weight of the non-magnetic drill collar and the drill column is dozens of tons, the accuracy of receiving butt-joint signals is high, accurate parameters of the high-temperature salt well dissolving cavity are mastered.

2. The magnetic guide butt joint instrument in the navigation conveying device is connected with the lower end of a cable, the upper end of the cable sequentially penetrates through the non-magnetic drill collar and the drill rod to be connected with a winch, and the magnetic guide butt joint instrument is conveyed into the navigation conveying device along inner holes of the drill rod and the non-magnetic drill collar through a cable on the winch.

3. The drilling machine can pump saturated saline water into a sitting and hanging assembly cavity of the navigation conveying device along inner holes of the drill column and the non-magnetic drill collar, the pressure of the saturated saline water in the sitting and hanging assembly cavity enables a spring of a spring back pressure sleeve in the unidirectional flow assembly to contract, the unidirectional flow assembly cavity is opened, the saturated saline water in the sitting and hanging assembly cavity enters the unidirectional flow assembly cavity, the saturated saline water in the unidirectional flow assembly cavity enters the deflection guide assembly cavity through a through hole in the partition plate and is sprayed out through a jet hole in the lower portion of the deflection guide assembly, impurities in the drill column, the non-magnetic drill collar and the navigation conveying device are discharged, the inner holes of the drill column and the non-magnetic drill collar are enabled to form a smooth channel, the magnetic steering of a docking instrument is facilitated, safe descending and lifting of the magnetic steering docking instrument are guaranteed, and the construction safety and stability are improved.

4. The navigation conveying device is provided with the unidirectional flow assembly, saturated saline water can only flow in a unidirectional mode, and rock debris in the well cannot enter inner holes of the non-magnetic drill collar and the drill rod column through the jet holes in the deflection guiding assembly, so that the situation that the rock debris in the well meets resistance in the non-magnetic drill collar and the drill rod column when a magnetic guide butt joint instrument is conveyed is avoided, the safe descending and the lifting of the magnetic guide butt joint instrument into and out of a high-temperature salt well dissolving cavity are guaranteed, and the construction safety and stability are improved.

Drawings

Fig. 1 is a schematic structural diagram of a high-temperature salt well directional well butt-joint navigation conveying system of the invention.

Fig. 2 is a schematic structural diagram of a navigation transportation device of the present invention.

FIG. 3 is a schematic diagram of the butt joint construction of the high-temperature salt well directional well butt joint navigation conveying system.

In the figure:

1. directional well 2, drilling machine 3, drilling string

4. Non-magnetic drill collar 5, navigation conveying device 6 and high-temperature salt well dissolving cavity

7. Magnetic guide butt joint instrument 8, cable 9 and winch

10. A sitting and hanging assembly 11, a unidirectional flow assembly 12 and an inclined guide assembly

13. A sitting and hanging sleeve 14, a clapboard 15 and a through hole

16. Spring back pressure sleeve 17, jet hole 18 and hard wear-resistant alloy block

19. Female buckle 20, jackscrew 21 and horizontal well

22. Ferromagnetic joint 23, drill bit

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, the high-temperature salt well directional well butt-joint navigation conveying system provided by the invention comprises a directional well 1, a drilling machine 2, a drill column 3, a non-magnetic drill collar 4, a navigation conveying device 5, a high-temperature salt well dissolving cavity 6, a magnetic guide butt-joint instrument 7, a cable 8 and a winch 9, wherein the drilling machine 2 is installed at the well mouth of the directional well 1, the drill column 3 is arranged in the directional well 1, the drilling machine 2 is connected to the upper end of the drill column 3, the non-magnetic drill collar 4 at the lower end of the drill column 3 is connected to the navigation conveying device 5, the navigation conveying device 5 is placed at the center of the high-temperature salt well dissolving cavity 6, the magnetic guide butt-joint instrument 7 in the navigation conveying device 5 is connected to the lower end of the cable 8, and the upper end of the cable 8 sequentially passes through the.

The navigation conveying device 5 is sequentially provided with a sitting and hanging assembly 10, a unidirectional flow assembly 11 and a deflection guiding assembly 12 from top to bottom, the upper portion of the sitting and hanging assembly 10 is connected with a non-magnetic drill collar 4 at the lower end of a drill string 3, a sitting and hanging sleeve 13 is installed inside the sitting and hanging assembly 10, a magnetic steering butt-joint instrument 7 is placed inside the sitting and hanging sleeve 13, a cavity of the sitting and hanging assembly 10 is communicated with a cavity of the unidirectional flow assembly 11, a partition plate 14 is arranged between the cavity of the unidirectional flow assembly 11 and the deflection guiding assembly 12, a through hole 15 is formed in the partition plate 14, a spring back-pressure sleeve 16 is installed in the middle of the partition plate 14, the spring back-pressure sleeve 16 is located in the cavity of the unidirectional flow assembly 11, and.

Through holes 15 are symmetrically formed in the partition plates 14 on the left side and the right side of the spring back pressure sleeve 16.

The lower end of the inclination guiding assembly 12 is in a cone shape, and hard wear-resistant alloy blocks 18 are uniformly embedded on the outer surface of the inclination guiding assembly 12. Wherein, the lower end of the slope guiding assembly 12 is in a cone shape, the cone is in an eighteen-degree lead angle, and the abrasion resistance with the wall of the salt well is reduced in the process of pulling out and putting down the drill rod. The outer diameter of the navigation conveyor 5 is one hundred twenty millimeters. The hard wear-resistant alloy block 18 can effectively pull or crush fallen blocks and rock debris by rotating under the driving of the ground drilling machine 2, so that the positions and states of the fallen blocks and the rock debris are changed, and the fallen blocks or the rock debris are effectively discharged out of the directional well 1.

The upper part of the sitting and hanging assembly 10 is provided with a threaded female buckle 19, the upper part of the sitting and hanging assembly 10 is in threaded connection with the non-magnetic drill collar 4 at the lower end of the drill string 3 through the female buckle 19, and the sitting and hanging sleeve 13 is installed inside the sitting and hanging assembly 10 through a jackscrew 20.

The oblique guide assembly 12 is provided with three injection holes 17 at equal intervals from bottom to top, and the injection holes 17 all comprise four evenly distributed injection holes 17. Wherein each injection hole 17 has an aperture of about five millimeters. The jet hole 17 is mainly used for discharging saturated brine and impurities in the inner hole of the drill string 3, and can also generate hydraulic impact to break broken pieces and debris in the well bore and discharge the broken pieces and debris out of the well.