MWD directional hydraulic whipstock

Abstract

An MWD directional hydraulic whipstock comprises whipstock inclined iron and a setting anchoring device which are connected with each other, and the setting anchoring device comprises a cylinder sleeve, an upper cone-shaped body, a lower cone-shaped body and a limiting pipe connected with the upper cone-shaped body and the lower cone-shaped body, the device is characterized in that a circulating pipe is fixedly connected to the lower end of the lower conical body, a circulating hole is formed in the wall of the circulating pipe, a liner pipe and a plunger are sequentially arranged in the circulating pipe in a clearance fit mode, a plunger seat is fixed to the lower end in the circulating pipe in a sealed mode, and a plunger rod is arranged at the lower end of the plunger and penetrates out of a center hole of the plunger seat in a sliding fit mode; in the initial state, the liner tube and the plunger are located below the circulating hole, an inner cavity of the circulating tube is communicated with the external space through the circulating hole, and after wireless orientation, the plunger rod makes contact with the well bottom to push the liner tube to move upwards to seal the circulating hole, so that the whipstock is lifted to the setting position to start pressure building and setting. The whipstock can circulate drilling fluid under various well conditions so that a wireless logging instrument can be adopted for orientation, and pressure building setting can be smoothly achieved after orientation is completed.

Description

Technical Field

[0001] This utility model pertains to side-drilling tools, and specifically relates to an MWD directional hydraulic guide tool. Background Technology

[0002] Hydraulic guide tools are tools used for side-drilling with window openings in wells. Existing hydraulic guide tools come in two types: split-type and integrated-type. The split-type guide tool consists of a hollow connector with an internal through-hole, an infeeder connected to the outlet of the hollow connector, a guide wedge fixed to the lower end of the infeeder, and a setting device fixed to the lower end of the guide wedge. The integrated guide tool consists of a milling taper, a guide wedge, and a setting device.

[0003] Since most sidetracking wells require directional drilling, a dedicated logging truck is typically used to lower the logging instrument to the positioning connector above the guide vane via a cable. After the logging instrument is set, the guide vane is positioned based on the measurement data. Because the preparation and operation time for logging with a logging truck is relatively long, it is not only costly but also causes many inconveniences for sidetracking operations.

[0004] With technological advancements, wireless logging, or logging while drilling technology, has become increasingly sophisticated. Wired logging tools are gradually being replaced by wireless logging tools such as MWD and LWD. However, wireless logging tools require circulating drilling fluid to transmit logging parameters to the surface. Therefore, the prerequisite for using wireless logging tools for directional guides is that they must be able to circulate drilling fluid.

[0005] To meet the requirements of circulating drilling fluid for wireless logging tools, CN210918882U discloses a wireless self-orienting hydraulic guide. This guide has a valve core and a pressure spring fitted onto the valve core within a lower conical body, located between the limiting tube and the setting edge. The upper end of the valve core has a clearance fit with the inner hole of the lower conical body; the lower end of the valve core, under the action of the pressure spring, forms a flow gap with the setting edge, allowing drilling fluid to flow out of the setting and anchoring device, thus achieving drilling fluid circulation. Therefore, this guide enables wireless logging tool orientation. When the drilling fluid discharge reaches or exceeds a predetermined value, the pressure spring is compressed, and the valve core is pressed against the setting edge, closing the flow gap and achieving pressure-locked setting. However, due to the presence of large amounts of heavy oil in some wells, the accumulation of heavy oil between the lower conical body and the valve core can easily affect the opening and closing of the valve core, causing the wireless logging tool to malfunction.

[0006] To address the aforementioned issues, CN218912835U discloses an integrated window-opening sidetracking tool that facilitates orientation with a wireless logging tool. This tool has a cap at the lower end of the conical body of the setting and anchoring device, with multiple water passages on the cap. These water passages are stepped, forming annular setting edges at the steps to allow drilling fluid circulation and achieve setting after the insertion of multiple setting balls. A ball-passing groove is provided axially on the other side of the milling cone corresponding to the positioning key, facilitating the insertion of setting balls into the tool after orientation with the wireless logging tool to achieve setting. However, because the inner diameters of the multiple water passages are relatively small, impurities in the drilling fluid, such as iron filings and rock cuttings, easily clog these passages, causing the wireless logging tool to malfunction. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a MWD directional hydraulic guide that can circulate drilling fluid under various well conditions so as to enable orientation using a wireless logging tool, and can smoothly achieve pressure setting and sealing after orientation is completed.

[0008] The technical solution of this utility model is as follows:

[0009] A MWD directional hydraulic guide device includes interconnected guide wedges and a setting and anchoring device. The setting and anchoring device includes a cylinder liner, an upper conical body and a lower conical body disposed within the cylinder liner, and a limiting tube connecting the upper and lower conical bodies. Its characteristic is:

[0010] A circulation pipe is fixed to the lower end of the lower conical body. A circulation hole is provided on the wall of the circulation pipe. A liner and a plunger are sequentially arranged inside the circulation pipe through a clearance fit. A plunger seat is sealed and fixed at the lower end of the circulation pipe. A plunger rod is provided at the lower end of the plunger and passes through the central hole of the plunger seat through a sliding fit. In the initial state, the liner and the plunger are located below the circulation hole. The inner cavity of the circulation pipe is connected to the external space through the circulation hole. After wireless orientation, the plunger rod contacts the bottom of the well and pushes the liner upward to close the circulation hole, so as to raise the guide to the setting position and start pressure setting.

[0011] As a further preferred embodiment, the circulation holes are two in number and arranged symmetrically.

[0012] As a further preferred option, sealing rings are provided between the outer edge of the liner and the plunger and the circulation pipe to improve the sealing effect.

[0013] As a further preferred embodiment, the outer edge of the liner has two sets of sealing rings, with two sealing rings in each set; when the liner is pushed to the top dead center by the plunger, the two sets of sealing rings are located on both sides of the circulation hole.

[0014] As a further preferred option, two longitudinal notches are symmetrically provided at the lower end of the liner to ensure the relative position between the liner and the circulation pipe, so as to prevent the liner from slipping off after the circulation hole is closed.

[0015] As a further preferred option, a hollow connector is connected to the guide wedge via a feeder to facilitate the connection of the drill bit.

[0016] As a further preferred option, a milling cone is connected to the wedge of the guide wedge to facilitate the opening operation after the sealing is completed.

[0017] The beneficial effects of this utility model are:

[0018] 1. Because a circulation pipe is fixed to the lower end of the lower cone, and the circulation pipe has circulation holes with a relatively large diameter, impurities in the heavy oil and drilling fluid in the well will not clog the circulation holes. This meets the requirements for circulating drilling fluid when using a wireless logging tool such as MWD for directional drilling. After the directional drilling tool is oriented, it is lowered. When the plunger rod touches the bottom of the well, the plunger pushes the liner to close the circulation holes, thus sealing the internal and external circulation channels of the circulation pipe. The directional drilling tool can then be raised to the setting position to begin pressure setting. This satisfies both the requirements for circulating drilling fluid when using a wireless logging tool for directional drilling and the requirements for setting and pressure setting of the directional drilling tool. This greatly simplifies the directional drilling operation, shortens the directional drilling time, and saves considerable directional drilling costs. Moreover, it is suitable for various well conditions.

[0019] 2. Convenient to use: During operation, the guide vane and wireless logging instrument can be run into the well simultaneously. Once the guide vane reaches the predetermined position in the well, drilling fluid can be circulated directly to begin orientation and setting. This not only eliminates the need to use a logging truck to run up and down the gyroscope, but also avoids the blockage caused by impurities adhering to the inner wall of the drill string and the peeling and accumulation of the inner coating of the drill string due to running up and down the gyroscope, which would prevent the guide vane from being set. This greatly shortens the directional operation time and well construction cycle, and improves the success rate of guide vane setting.

[0020] 3. Because the lower end of the lower cone is fixed with a circulation pipe with circulation holes, the drilling fluid inside and outside the guide tool is connected. This not only avoids mis-setting caused by pressure surges or suction during the tripping of the guide tool, but also prevents the accumulation of heavy oil and drilling fluid impurities in the drill string, which would affect the setting of the guide tool. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0022] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0023] Figure 3 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0024] In the diagram: 1. Plunger rod; 2. Plunger seat; 3. Shoe tube; 4. Plunger; 5. Sealing ring; 6. Circulation tube; 7. Liner; 7. Longitudinal notch; 8. Sealing ring; 9. Circulation hole; 10. Thread; 11. Thread; 12. Longitudinal slip; 13. Shear screw; 14. Lower cone; 15. Sealing ring; 16. Limiting tube; 17. Cylinder liner; 18. Sealing ring; 19. Upper cone; 20. Radial slip; 21. Shear screw; 22. Sealing ring; 23. Jet tube; 24. Guide wedge; 25. Liquid guide tube; 26. Elbow seat; 27. Sealing ring; 28. Elbow body; 29. ​​Hook body; 30. Limiting screw; 31. Set screw; 32. Split retaining ring; 33. Sealing ring; 34. Feeder; 35. Support sleeve; 36. Positioning screw; 37. Connector; 38. Positioning key; 39. Milling cone; 40. Positioning block; 41. Milling cone. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] like Figures 1-2 As shown, this utility model relates to an MWD directional hydraulic guide tool, comprising a hollow connector 37, an infeeder 34, a guide tool wedge 24, and a setting and anchoring device connected in sequence. The connector 37 is threadedly connected to the infeeder 34. A fluid guide tube 26 is provided inside the guide tool wedge 24, connecting the inner hole of the infeeder 34 to the inner cavity of the setting and anchoring device. A positioning key 38 is inserted radially and welded to the middle of the connector 37. The positioning key 38 protrudes from the inner wall of the connector 37 and is aligned with the center line of the inclined surface of the guide tool wedge 24. The positioning key 38 matches the keyway on the lead of the wireless logging tool used to determine the orientation of the inclined surface of the guide tool wedge 24.

[0028] The diameter of a section of the inner hole of the connector 37 corresponding to the positioning key 38 is 2 mm larger than the diameter of the wireless logging tool's lead. The positioning key 38 protrudes 3 mm from the inner wall of the connector 37. The feeder 34 presses against the inclined surface of the guide wedge 24. The upper end of the inclined surface of the guide wedge 24 and the positioning key 38 are located on opposite sides of the axis of the coaxially arranged connector 37 and feeder 34, respectively.

[0029] A hook body 29 is threaded to the lower end of the feeder 34 and fixed by a set screw 31. An elbow body 28 is inserted into the hook body 29. The upper end of the elbow body 28 passes through the center hole of the hook body 29 and is then sealed and inserted into the center hole of the feeder 34. An annular groove is provided on the upper part of the outer edge of the elbow body 28. A split retaining ring 32 is sleeved in the annular groove between the upper end of the hook body 28 and the feeder 34 to hold the elbow body 28 in place. A sealing ring 33 is provided between the upper end of the elbow body 28 and the feeder 34.

[0030] An arc-shaped groove is machined on the inclined surface of the guide wedge 24 corresponding to the hook body 29. An integral arc-shaped hook is provided on the hook body 29 and is locked in the arc-shaped groove after rotation. The lower end of the elbow body 28 is inserted into the guide wedge 24 and connected to the upper end of the fluid guide pipe 25 so that after setting, the drill bit can be rotated to disengage the feeder 34 from the guide wedge 24. A bend seat 26 is embedded and welded on the wedge 24 of the guide rail corresponding to the bend body 28. The bend seat 26 coincides with the outer edge and the inclined surface of the wedge 24 of the guide rail. The arc-shaped groove is provided on the bend seat 26. The lower end of the bend body 28 is inserted into the liquid guide hole provided on the bend seat 26 through a clearance fit and communicates with the liquid guide pipe 25 through the liquid guide hole. Two sealing rings 27 are provided between the lower end of the bend body 28 and the liquid guide hole. A limiting screw 30 for connecting the arc hook is provided radially on the bend seat 26 at the corresponding arc hook position.

[0031] A support sleeve 35 is fixed to the outer edge of the middle part of the feeder 34. A positioning screw 36 is inserted radially into the wedge 24 of the guide rail corresponding to the support sleeve 35. The front end of the positioning screw 36 is connected to the support sleeve 35 to fix the support sleeve 35 and support the feeder 34 through the support sleeve 35.

[0032] The setting and anchoring device includes a cylinder sleeve 17 fixed to the outer edge of the lower end of the guide wedge 24 and a jet tube 23 inserted into and fixed in the central hole of the lower end of the guide wedge 24. The upper end of the jet tube 23 is inserted into the lower end of the liquid guiding tube 25. A hollow upper cone 19 and a lower cone 14 are provided inside the cylinder sleeve 17. The lower end of the jet tube 23 is inserted into the central hole of the upper cone 19 with a clearance fit. Sealing rings 22, 18 and 15 are respectively provided between the jet tube 23 and the upper cone 19, and between the upper and lower cones and the cylinder sleeve 17. Radial slips 20 are evenly distributed around the outer wall of the upper conical body 19 via shear screws 21. Longitudinal slips 12 are evenly distributed around the outer wall of the lower conical body 14 via shear screws 13. The radial slips 20 and longitudinal slips 12 can extend out through rectangular openings on the outer wall of the cylinder liner 17 under the pushing action of the upper conical body 19 and lower conical body 14. A limiting tube 16 is provided in the central hole of the lower conical body 14. The upper end of the limiting tube 16 is connected to the inner hole of the upper conical body 19 via a coarse thread, and the limiting tube 16 is connected to the lower conical body 14 via a fine-tooth sawtooth thread with the sawtooth thread tips facing downwards. Longitudinal strip holes 161 are evenly distributed around the circumference of the limiting tube 16. A guide tube 3 is connected to the lower end of the cylinder liner 17 via a thread 11.

[0033] The lower end of the lower conical body 14 is fixedly connected to a circulation pipe 6 via a thread 10. The circulation pipe 6 is located inside the guide shoe tube 3. Two circulation holes 9 are provided on the upper part of the circulation pipe 6, symmetrically arranged on both sides of its center line. A liner 7 and a plunger 4 are arranged vertically within the circulation pipe 6 via a clearance fit. A plunger seat 2 is sealed and welded to the lower end of the circulation pipe 6. An integral plunger rod 1 is located at the center of the lower end of the plunger 4 and extends through the center hole of the plunger seat 2 via a sliding fit. In the initial state, the liner 7 and the plunger 4 are located below the circulation holes. The inner cavity of the circulation pipe 6 communicates with the external space through the circulation holes. After wireless orientation, the plunger rod 1 contacts the bottom of the well, pushing the liner 7 upward to close the circulation holes 9, thereby raising the guide tool to the setting position to begin pressure setting.

[0034] Sealing rings 8 and 5 are respectively provided between the outer edges of the liner 7 and the plunger 4 and the circulation pipe 6 to improve the sealing effect. There are two sets of sealing rings 8 on the outer edge of the liner 7, and each set has two sealing rings 8. When the liner 7 is pushed to the top dead center by the plunger, the two sets of sealing rings 8 are located on both sides of the circulation hole 9.

[0035] Two longitudinal notches 701 are symmetrically provided at the lower end of the liner 7 so that the lower end of the liner 7 can be tightly attached to the inner wall of the circulation pipe 6 after it expands outward. This is to ensure the relative position between the liner 7 and the circulation pipe 6 and to prevent the liner 7 from slipping off after the circulation hole is closed.

[0036] The specific operating steps for performing the task are as follows:

[0037] 1. Connect the guide to the drill string via connector 37 and place the MWD (wireless logging tool) inside the drill string. Under its own gravity, the MWD reaches the inner cavity of connector 37. When the MWD guide continues to descend through the positioning key 38, it is restricted by the size of the inner cavity of connector 37 and positioning key 38, as well as its own gravity, which forces the tip of the MWD guide to guide its own keyway to lock onto the positioning key 38.

[0038] 2. After the guide tool is lowered to the predetermined position in the well using the drill string, the upper drill pipe or top drive is connected, and the pump is started to circulate the drilling fluid. The drilling fluid passes through the inner hole of the drill string, the MWD, into the connector 37, the feeder 34, the elbow body 28, the fluid guide pipe 25, the jet pipe 23, the inner hole of the upper cone body 19, the limiting pipe 16, and reaches the inner cavity of the circulation pipe 6, from which it is ejected from the circulation hole 9. It then passes through the circulation pipe 6 and the guide shoe pipe 3, enters the well from the bottom of the guide shoe pipe 3, and then returns to the surface through the annular space between the guide tool and the drill string and the casing in the well. Based on the logging data read by the MWD received on the surface, the drill string is rotated to adjust the orientation of the inclined surface of the guide tool slant 24 to the designed orientation, thus completing the orientation work of the guide tool slant 24.

[0039] 3. After placing the guide wedge 24, slowly lower the drill string without rotating it until the lower end of the plunger rod 1 contacts the bottom of the well. Apply a slight drilling pressure of about 30KN and push the liner 7 up to the lower end face of the lower cone 4 through the plunger 4 at the upper end of the plunger rod 1. At this time, the two sets of sealing rings 8 on the liner 7 are located on both sides of the circulation hole 9, completing the sealing of the circulation hole.

[0040] 4. Keep the drill string still and slowly lift the guide vane to the predetermined position, then start the pump. As the pump pressure increases, it pushes the plunger 4 down into the plunger seat 2 in the circulation pipe 6 and begins to pressurize. The high-pressure drilling fluid in the drill string enters between the upper cone 19 and the lower cone 14 through the strip hole 161, which will push the upper cone 19 and drive the limit tube 16 to cause a "slip-locking" phenomenon between it and the lower cone 14. Finally, the upper cone 19 cuts off the shear screw 21, and the lower cone 14 cuts off the shear screw 13, forcing the radial slip 20 and the longitudinal slip 12 to extend and lock onto the well wall. When the pump pressure reaches the predetermined value, stop the pump and stabilize the pressure for 30 seconds.

[0041] 5. Then rotate the drill string forward. The drill string drives the feeder 34 to rotate and cut off the positioning screw 36 and the limit screw 30, so that the arc hook on the hook body 29 is unscrewed from the arc groove, and the lower end of the elbow body 28 is pulled out from the elbow seat 26. Then, the drill string is pulled out, and the connector 37, feeder 34, hook body 29 and elbow body 28 are brought out from the well. Finally, the milling cone is lowered into the well to perform the window opening operation along the inclined surface of the guide wedge 24.

[0042] Example 2

[0043] like Figure 3As shown, this utility model relates to an MWD directional hydraulic guide tool, comprising a hollow milling cone 41, a guide tool wedge 24, and a setting and anchoring device connected in sequence. A positioning key 38 is radially inserted and welded into the upper part of the milling cone 41. The positioning key 38 protrudes from the inner wall of the milling cone 41 and is aligned with the center line of the inclined surface of the guide tool wedge 24. The positioning key 38 matches the keyway on the wireless logging tool guide used to determine the orientation of the inclined surface of the guide tool wedge 24. The inner hole of the milling cone 41 is a stepped hole with decreasing diameter from top to bottom. The upper end of the inner hole of the milling cone 41 is a connecting screw hole for connecting the drill string. The diameter of a section of the inner hole of the milling cone 41 corresponding to the positioning key 38 is 2 mm larger than the diameter of the wireless logging tool guide. The positioning key 38 protrudes 3 mm from the inner wall of the milling cone 41.

[0044] The lower outer edge of the milling cone 41 presses against the upper part of the inclined surface of the guide wedge 24. An annular groove is machined along the circumferential direction on the lower part of the milling cone 41. The annular groove on one side of the guide wedge 24 is a section of arc-shaped dovetail groove that is wider inside and narrower outside, and most of the rest is a trapezoidal groove that is narrower inside and wider outside. A positioning block 40 is fixed on the inclined surface of the guide wedge 24 at the location corresponding to the annular groove. The positioning block 40 is cylindrical on one side of the guide wedge 24 and is inserted and welded to the guide wedge 24. An arc-shaped retaining edge is provided on the positioning block 40 to cooperate with the arc-shaped dovetail groove. The positioning block 40 is inserted into the arc-shaped dovetail groove through the arc-shaped retaining edge. A limit screw 30 is connected between the positioning block 40 and the milling cone 41.

[0045] A positioning bolt 36 is provided radially between the upper end of the guide wedge 24 and the milling cone 41. A liquid guide tube 25 is provided inside the guide wedge 24, which connects the inner hole of the milling cone 41 and the inner cavity of the setting and anchoring device. A milling cone head 39 is fixed to the lower end of the milling cone 41. A nozzle hole communicating with the inner hole of the milling cone 41 is provided on the milling cone head 39. The upper end of the liquid guide tube 25 is led out from the upper part of the inclined surface of the guide wedge 24 and inserted and welded into the nozzle hole.

[0046] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again in this embodiment.

[0047] The specific operating steps for performing the task are as follows:

[0048] 1. Connect the upper end of the milling cone 41 to the drill string and place the wireless logging instrument inside the drill string. The wireless logging instrument reaches the inner cavity of the milling cone 41 under its own gravity. When the wireless logging instrument guide continues to descend after passing the positioning key 38, it is restricted by the size of the inner cavity of the milling cone and the positioning key 38, as well as its own gravity, which forces the tip of the wireless logging instrument guide to lock itself onto the positioning key 38.

[0049] 2. After the guide tool is lowered to the predetermined position in the well using the drill string, the upper drill pipe or top drive is connected, and the pump is started to circulate the drilling fluid. The drilling fluid passes through the inner hole of the drill string, the MWD, the inner hole of the milling cone 41, the fluid guide tube 25, the jet tube 23, the inner hole of the upper cone 19, the limiting tube 16, and reaches the inner cavity of the circulation tube 6, from which it is ejected from the circulation hole 9. It then passes through the circulation tube 6 and the guide shoe tube 3, enters the well from the bottom of the guide shoe tube 3, and then returns to the surface through the annular space between the guide tool and the drill string and the casing in the well. Based on the logging data read by the MWD received on the surface, the drill string is rotated to adjust the orientation of the inclined surface of the guide tool 24 to the designed orientation, thus completing the orientation work of the guide tool 24.

[0050] 3. After placing the guide wedge 24, slowly lower the drill string without rotating it until the lower end of the plunger rod 1 contacts the bottom of the well. Apply a slight drilling pressure of about 30KN and push the liner 7 up to the lower end face of the lower cone 4 through the plunger 4 at the upper end of the plunger rod 1. At this time, the two sets of sealing rings 8 on the liner 7 are located on both sides of the circulation hole 9, completing the sealing of the circulation hole.

[0051] 4. Keep the drill string still and slowly lift the guide vane to the predetermined position, then start the pump. As the pump pressure increases, it pushes the plunger 4 down into the plunger seat 2 in the circulation pipe 6 and begins to pressurize. The high-pressure drilling fluid in the drill string enters between the upper cone 19 and the lower cone 14 through the strip hole 161, which will push the upper cone 19 and drive the limit tube 16 to cause a "slip-locking" phenomenon between it and the lower cone 14. Finally, the upper cone 19 cuts off the shear screw 21, and the lower cone 14 cuts off the shear screw 13, forcing the radial slip 20 and the longitudinal slip 12 to extend and lock onto the well wall. When the pump pressure reaches the predetermined value, stop the pump and stabilize the pressure for 30 seconds.

[0052] 5. Then rotate the drill bit forward. The drill bit drives the milling cone to rotate and shear off the positioning screw 36 and the limit screw 30. At the same time, the positioning block 40 is unscrewed from the arc-shaped dovetail groove. Continue to rotate the drill bit. The fluid guide tube 25 is twisted off at the nozzle hole outlet, so that the nozzle hole naturally forms a milling cone nozzle. At this time, the guide wedge 24 and the milling cone 41 are completely separated. Then the pump can be restarted to circulate the drilling fluid. Rotate the drill bit and apply drilling pressure to perform window side drilling.

[0053] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A MWD directional hydraulic whipstock, comprising a whipstock wedge and a setting anchor device connected with each other, the setting anchor device comprising a cylinder, an upper cone and a lower cone arranged in the cylinder and a spacer pipe connecting the upper and lower cones; characterized in that: a circulation pipe is fixed to the lower end of the lower cone, a circulation hole is arranged on the wall of the circulation pipe, a liner and a plunger are arranged in the circulation pipe in sequence through clearance fit, a plunger seat is fixed and sealed at the lower end in the circulation pipe, a plunger rod is arranged at the lower end of the plunger and passes out through the center hole of the plunger seat through sliding fit; in the initial state, the liner and the plunger are located below the circulation hole, the inner cavity of the circulation pipe is communicated with the outside space through the circulation hole, and after wireless orientation, the liner is pushed up to close the circulation hole by the plunger rod contacting the bottom of the well, so as to lift the whipstock to the setting position and start pressure build-up setting.

2. The MWD directional hydraulic whipstock of claim 1, wherein: The circulation hole is two and symmetrically arranged.

3. The MWD directional hydraulic whipstock of claim 1, wherein: Sealing rings are respectively arranged between the outer edges of the liner and the plunger and the circulation pipe to improve the sealing effect.

4. The MWD directional hydraulic whipstock of claim 1, wherein: The sealing rings of the outer edge of the liner are two groups and each group of sealing rings is two; when the liner is pushed to the upper dead center by the plunger, the two groups of sealing rings are respectively located on both sides of the circulation hole.

5. The MWD directional hydraulic whipstock of any of claims 1-4, wherein: Two longitudinal slits are symmetrically arranged at the lower end of the liner to ensure the relative position between the liner and the circulation pipe, so as to prevent the liner from sliding down after closing the circulation hole.

6. The MWD directional hydraulic whipstock of claim 5, wherein: A hollow joint is connected to the whipstock wedge through a running tool to facilitate the connection of drilling tools.

7. The MWD directional hydraulic whipstock of claim 5, wherein: A milling cone is connected to the whipstock wedge to facilitate windowing operation after setting.

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