Time-set packer

Abstract

The application provides a timing setting packer, which is applied to a downhole casing and at least comprises a guide part and a setting part arranged and connected in an up-down mode, the guide part and the setting part form a structure with a hollow cavity, a driving part is packaged in the hollow cavity and is driven by a downhole liquid to drive the setting part to expand radially and bite the casing; and the timing setting packer further comprises a controller for controlling the timing start and stop of the driving part. The timing setting packer is suitable for setting and unsetting in a downhole window sidetracking operation, and precise setting is realized by using a ground real-time or downhole timing setting mode; the downhole liquid is used as a driving force during setting, that is, the downhole liquid drives the setting part to expand radially and bite the casing, and the deeper the depth of the downhole liquid is, the greater the fluid pressure is, and the stronger the setting effect is, thereby effectively avoiding missetting.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of oil and gas field drilling equipment, and particularly relates to a timed setting whipstock. BACKGROUND

[0002] In the process of windowing sidetracking of an old wellbore of an oil and gas field, a whipstock needs to be set at the casing windowing position to facilitate windowing sidetracking. To improve efficiency, it is the best choice to realize the running, setting, windowing and window repairing of the whipstock in one trip. The current whipstock with such a function adopts a reversing groove structure and is set by being pulled up and put down. However, it is inevitable to pull up and put down to remove the sticking of the drill string during normal running of the drill string. Therefore, the whipstock is prone to be set by mistake, which leads to damage of the slips and is not conducive to secondary setting. In addition, with the influence of the hole inclination and the hole depth, the shear pin of the upper connection milling cone of the whipstock is less sensitive to the drilling pressure and the friction resistance, which makes it difficult for the driller to determine whether the whipstock is set and whether the shear pin is sheared on the drilling platform, and large difficulties are caused.

[0003] A timed setting whipstock is disclosed in Chinese Patent Publication No. CN216043526U, which uses powder setting. The powder combustion boosts the upward movement of the lower slip seat, the lower slip seat pushes the slip to move upward along the upper slope of the upper slip seat, and the slip is simultaneously radially stretched and bites into the inner wall of the casing to achieve setting. However, using powder as a boost has the following risks:

[0004] (1) The success rate of using powder as a boost is not high.

[0005] (2) After each use, the setting tool needs to be disassembled and reconditioned and filled with powder, which requires high operation skills and a complicated procedure. SUMMARY

[0006] The present application aims to provide a timed setting whipstock to overcome the above technical defects.

[0007] To solve the above technical problems, the present application provides a timed setting whipstock applied to a downhole casing, which at least includes a whipstock guide part and a setting part arranged and connected in an up-down manner, and the two parts form a structure with a hollow cavity. A driving member is packaged in the hollow cavity, which is boosted by downhole liquid to drive the setting part to radially expand and bite the casing.

[0008] The controller also controls the timing start and stop of the driving member.

[0009] The setting part includes a barrel and a whipstock guide arranged in an up-down manner with a spacing therebetween. A plurality of slips are arranged between the barrel and the whipstock guide. One end of the slip is connected to the whipstock guide, and the other end of the slip is attached to the barrel.

[0010] When the downhole liquid enters the barrel and the controller commands the driving member to start, the slip moves upward along the outer wall of the barrel to make all the slips radially expand and bite the casing.

[0011] The inner part of the barrel is a hollow cavity section and a solid column section, the solid column section is provided with a through hole for the piston rod to pass through and a fluid delivery channel for guiding the downhole fluid into the hollow cavity section;

[0012] A cylinder is arranged in the space formed by the hollow cavity section of the barrel and the hollow cavity of the guide section, the downhole fluid stored in the hollow cavity section drives the piston rod to move the piston installed at the top end of the piston rod in the interior of the cylinder;

[0013] The bottom end of the piston rod is connected to the guide;

[0014] When the piston rod moves upward, the piston rod drives the slips to move upward.

[0015] A spring is arranged between each slip and the guide, one end of the spring is connected to the slip and the other end is connected to the guide.

[0016] The lower end of the cylinder is sealingly inserted into the hollow cavity of the barrel, the piston divides the inner cavity of the cylinder into a rod cavity and a rodless cavity, the downhole fluid from the hollow cavity of the barrel is stored in the rod cavity to change the fluid pressure of the rod cavity and drive the piston to move.

[0017] A plurality of fixed pins are arranged in the rod cavity, one end of each fixed pin is embedded in the cylinder wall of the cylinder and the other end abuts against the piston rod.

[0018] The piston rod and the piston form a driving member, the driving member further comprises a timing switch valve, the downhole fluid from the hollow cavity of the barrel is connected to the first valve port of the timing switch valve through the first fluid pipeline, the second valve port of the timing switch valve is connected to the rod cavity of the cylinder through the second fluid pipeline;

[0019] The downhole fluid entering the hollow cavity of the barrel through the fluid delivery channel flows into the rod cavity of the cylinder in sequence through the first fluid pipeline and the second fluid pipeline, because the internal and external pressure difference of the rod cavity gradually increases, the fixed pins loosen and disengage from the piston rod, the piston drives the piston rod to move upward, the piston rod stretches upward to drive the guide to move upward, and the slip expands radially to engage the casing while moving upward.

[0020] The controller comprises an uphole part and a downhole part, wherein the uphole part is a PLC, and the downhole part comprises a gyroscope and a battery pack installed in the hollow cavity of the guide section;

[0021] The gyroscope is used to detect the rotation angle of the timing setting whipstock and send it to the PLC of the uphole part, and the PLC of the uphole part sends an opening and closing instruction to the timing switch valve to make the timing switch valve open or close;

[0022] Alternatively,

[0023] The battery pack instantaneously increases the current to the timing switch valve at a predetermined specified time, and the timing switch valve opens or closes.

[0024] The signal receiving amplifier is installed on the deflection part, and surrounds the alignment gyroscope and / or the timing switch valve.

[0025] The beneficial effects of the present application are as follows:

[0026] The timing setting whipstock is suitable for setting and releasing in the downhole window sidetracking operation, and realizes accurate setting in the way of surface real-time or downhole timing setting, adopts downhole liquid as driving force during setting, that is, the downhole liquid pushes to drive the setting part to expand radially and bite the casing, and the deeper the depth is, the greater the fluid pressure is, and the stronger the setting effect is, thereby effectively avoiding mis-setting.

[0027] In order to make the above content of the present application more obvious and easy to understand, the preferred embodiments are specifically described below, and the detailed description is as follows in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural diagram of the timing setting whipstock.

[0029] Figure 2 is a sectional view of the timing setting whipstock.

[0030] Figure 3 is an internal partial schematic view of the timing setting whipstock.

[0031] Figure 4 is a partial enlarged view of the rod cavity.

[0032] Figure 5 is an assembly view of the slip and the deflector.

[0033] Figure 6 is a layout view of the timing switch valve.

[0034] Figure 7 is an assembly view of the fixed pin and the piston rod.

[0035] Explanation of reference signs:

[0036] 10. deflection part;

[0037] 20. setting part; 21. barrel; 211. piston rod; 212. cylinder; 213. liquid channel; 214. piston; 22. deflector; 23. slip; 24. spring; 25. rotating pin; 26. fixed pin; 27. timing switch valve; 271. first fluid line; 272. second fluid line; 273. fluid switch valve; 274. electromagnetic control valve; 275. control valve core;

[0038] 31. gyroscope; 32. battery pack;

[0039] 40. A signal receiving amplifier. DETAILED DESCRIPTION

[0040] The present application is herein described, by way of example only, with reference to certain embodiments thereof, it being understood that deviations in form, detail, and

[0041] It should be noted that in the present application, the up, down, left and right in the figures are considered as the up, down, left and right of the time setting packer as described in the specification.

[0042] With reference to the drawings, exemplary embodiments of the present application are now described. The present application can, however, be carried out in many different ways, and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art. The terminology used in the description of the exemplary embodiments presented herein is not intended to be limiting. Identical elements are denoted using identical reference numerals in the various embodiments.

[0043] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0044] The present embodiment relates to a time setting packer applied to a downhole casing, please refer to Figure 1 , at least comprising a guide section 10 and a setting section 20 laid and connected in up and down directions, both of which form a structure with a hollow cavity, and a driving member is packaged in the hollow cavity, which is boosted by a downhole liquid to drive the setting section 20 to expand radially and engage the casing.

[0045] Compared with the traditional driving force of gunpowder, the present embodiment uses downhole liquid as the driving force, and the deeper the depth of the downhole liquid, the greater the fluid pressure, and the stronger the setting effect. It is not affected by the inclination and depth of the well, and can achieve precise setting and effectively avoid missetting.

[0046] In order to realize real-time setting on the ground or downhole time setting, the time setting packer further comprises a controller for controlling the time starting and stopping of the driving member. The controller sends instructions to the downhole to make the downhole liquid enter the setting section 20, and uses the fluid pressure of the downhole liquid to drive the setting section 20 to expand radially and engage the casing.

[0047] The structure of the guide section 10 can refer to Figure 1 and Figure 2The outer surface of the guide section 10 is provided with a slope for guiding the lateral drilling pipe column, and a key groove is formed on the outer surface of the guide section 10 near the top of the guide section 10, the key groove being used for connecting the lateral drilling pipe column; the inner lower half of the guide section 10 is hollow, which is equivalent to a blind hole, and is used for placing a driving member and a controller.

[0048] Referring to Figure 2 The setting part 20 comprises an upper and lower cylinder 21 and a guide section 22 which are arranged in parallel and are spaced apart, and a plurality of slips 23 are arranged between the upper and lower cylinder 21 and the guide section 22, the slips 23 being arranged in a ring shape at equal intervals, one end of the slip 23 being connected to the guide section 22, and the other end of the slip 23 being attached to the upper and lower cylinder 21.

[0049] Specifically, the upper and lower cylinder 21 is composed of an upper cylinder and a lower cylinder which are connected by threads, and the outer wall of the top end of the upper cylinder is connected to the inner wall of the bottom end of the guide section 10 by threads, thus the guide section 10, the upper cylinder and the lower cylinder together form a cylindrical structure.

[0050] When the downhole liquid enters the upper and lower cylinder 21 and the controller commands the driving member to be started, the slip 23 moves upward along the outer wall of the upper and lower cylinder 21 so that all the slips 23 expand radially to engage the casing.

[0051] The inner part of the upper and lower cylinder 21 is a hollow cavity section (i.e. the upper cylinder) and a solid column section (i.e. the lower cylinder), the solid column section is provided with a through hole for the piston rod 211 to pass through and a liquid delivery channel 213 for guiding the downhole liquid to enter the hollow cavity section, the downhole liquid enters the upper cylinder through the liquid delivery channel 213, and at this time the downhole liquid is stored in the upper cylinder.

[0052] The lower cylinder of the solid column section is provided with a flow guide square hole as the liquid delivery channel 213, which mainly plays a flow guide role.

[0053] Referring to Figure 2 The cylinder 212 is arranged in the space formed by the hollow cavity section of the upper and lower cylinder 21 and the hollow cavity of the guide section 10, the upper cylinder and the cylinder 212 are connected by threads, and the downhole liquid stored in the hollow cavity section drives the piston rod 211 to move the piston 214 installed at the top end of the piston rod 211 in the cylinder 212.

[0054] It should be noted that the cylinder 212 is composed of two parts which are connected by threads, the upper half part is a gas pump cavity, the gas pump cavity is a cylinder with one end closed and the other end open, the open end is downward, and the open end is connected to the lower half part of the cylinder 212 through a sealing external thread.

[0055] The bottom end of the piston rod 211 is connected to the guide section 22, that is, the lower section of the piston rod 211 is exposed and can directly contact the downhole liquid, the middle section penetrates the lower cylinder, and the upper section is inserted into the cylinder 212, and the piston 214 is installed at the top end of the piston rod 211, when the piston 214 drives the piston rod 211 to move upward, the piston rod 211 drives the slip 23 to move upward, thereby achieving setting.

[0056] As shown in Figure 2 and Figure 5 , a spring 24 is arranged between each slip 23 and the lead 22, one end of the spring 24 is connected to the slip 23, and the other end is connected to the lead 22, the spring 24 functions to limit and fix the movement of the slip 23.

[0057] It should be noted that the bottom end of the slip 23 is installed on the lead 22 by a rotating pin 25, the bottom of the slip 23 can rotate outward through the rotating pin 25, and the slip 23 is initially fixed and stretched in the vertical position by the fixing spring 24, at this time the upper part of the slip 23 is tightly attached to the outer surface of the lower cylinder.

[0058] Continuing to refer to Figure 2 , the lower end of the cylinder barrel 212 is sealingly inserted into the hollow cavity of the cylinder 21, and the piston 214 divides the inner cavity of the cylinder barrel 212 into a rod cavity and a rodless cavity, the downhole fluid from the hollow cavity of the cylinder 21 is stored in the rod cavity to change the fluid pressure of the rod cavity and push the piston 214 to move.

[0059] The piston 214 is tightly fitted to the cylinder barrel 212 by an O-ring.

[0060] Referring to Figure 7 , a plurality of fixed pins 26 (three as shown in Figure 7 ) are arranged in the rod cavity, one end of each fixed pin 26 is embedded in the wall of the cylinder barrel 212, and the other end abuts against the piston rod 211, and three grooves for accommodating the end of the fixed pin 26 are formed in the wall of the piston rod 211.

[0061] Please refer to Figure 4 , three holes are formed in the cavity wall of the rod cavity for placing the fixed pins 26, and two annular grooves are formed in the inner hole wall of each hole for placing O-rings, and the fixed pin 26 is tightly fitted with the hole on the rod cavity by passing through the O-ring, the hole is a through hole, and the center line of the hole is perpendicular to the axial center line of the piston rod 211.

[0062] Continuing to refer to Figure 7 , the main body of the fixed pin 26 is a two-section cylinder with different outer diameters, the end of the fixed pin 26 with a larger inner diameter is a circular truncated cone, which is placed in the groove of the piston rod 211, it should be noted that the top circular truncated cone of the fixed pin 26 cannot completely enter the inside of the piston rod 211, and the lateral projection area of the exposed circular truncated cone must be greater than the cross section of the fixed pin 26 with a smaller inner diameter.

[0063] As shown in Figure 2 , the piston rod 211 and the piston 214 form a driving member, which further includes a timing switch valve 27, as shown in Figure 6Downhole fluid from the hollow cavity of the barrel 21 enters the first valve port of the timing switch valve 27 through the first fluid line 271, and the second valve port of the timing switch valve 27 is connected to the rod cavity of the cylinder 212 through the second fluid line 272.

[0064] The downhole fluid entering the hollow cavity of the barrel 21 through the injection channel 213 flows into the rod cavity of the cylinder 212 after passing through the first fluid line 271 and the second fluid line 272 in turn. As the internal and external pressure difference of the rod cavity gradually increases, the fixed pin 26 is loosened and separated from the piston rod 211, the piston 214 drives the piston rod 211 to move upward, the piston rod 211 drives the whipstock 22 to move upward, and the slip 23 expands radially and clamps the casing while moving upward, thereby achieving setting.

[0065] Please refer to Figure 3 Specifically, the timing switch valve 27 includes a fluid switch valve 273, an electromagnetic control valve 274, and a control valve core 275. The fluid switch valve 273 is connected to the electromagnetic control valve 274 by threads, and the control valve core 275 passes through the electromagnetic control valve 274 and the fluid switch valve 273. The second fluid line 272 connects the rod cavity and the fluid switch valve 273, and the first fluid line 271 connects the fluid switch valve 273 and the hollow cavity of the barrel 21.

[0066] One end of the first fluid line 271 is connected to a sealed external threaded joint, and the other end is connected to the side middle inlet of the fluid switch valve 273 through a sealed thread.

[0067] One end of the second fluid line 272 is connected to a sealed external threaded joint, which is inserted into the rod cavity, and the other end is connected to the lower outlet of the fluid switch valve 273.

[0068] The main body of the fluid switch valve 273 is a circular ring body with an upper and lower through-hole in the center. The structure is similar to a tee joint. The bottom of the fluid switch valve 273 is provided with a sealed external thread, and the fluid switch valve 273 is connected to the upper barrel through the sealed external thread at the bottom. The top of the fluid switch valve 273 is provided with a sealed internal threaded hole, and the fluid switch valve 273 is connected to the electromagnetic control valve 274 through the internal thread at the top. Two grooves are formed in the inner wall of the central through-hole of the fluid switch valve 273 for placing O-rings. The middle position of the outer side of the fluid switch valve 273 is connected to the first fluid line 271 through a sealed internal thread. The central through-hole of the fluid switch valve 273 tightly matches the lower part of the control valve core 275.

[0069] The electromagnetic control valve 274 is an electromagnetic switch, and the middle part of the electromagnetic control valve 274 is the control valve core 275. The electromagnetic control valve 274 has a timer and a wireless receiver inside, and the bottom of the electromagnetic control valve 274 is connected to the upper part of the fluid switch valve 273 through a sealed external thread.

[0070] The controller comprises an uphole part and a downhole part, wherein the uphole part is a PLC, and the downhole part comprises a gyroscope 31 and a battery pack 32 installed in the hollow cavity of the whipstock 10, and the battery pack 32 is connected with the electromagnetic control valve 274.

[0071] The battery pack 32 is circular and is embedded in the annular space formed by the cylinder barrel 212 and the hollow cavity of the whipstock 10, i.e. is arranged around the gas pump cavity.

[0072] The gyroscope 31 is fixed at the top of the gas pump cavity, and the gyroscope 31 contains a signal transmitter, so that the gyroscope 31 is used to detect the rotation angle of the timed setting whipstock and send it to the PLC of the uphole part, and the PLC of the uphole part sends a switch command to the timed switch valve 27 to open or close the valve, so as to realize real-time control of setting on the ground.

[0073] Alternatively, the battery pack 32 instantaneously increases the current to the timed switch valve 27 at a preset specified time, and the timed switch valve 27 is opened or closed, i.e. when the specified time is reached, the electromagnetic control valve 274 triggers the circuit to be connected, the battery pack 32 increases the current to the electromagnetic control valve 274, and the control valve core 275 is lifted to a position capable of ensuring that the fluid switch valve 273 is opened.

[0074] Please refer to Figure 2 A signal receiving amplifier 40 is installed on the whipstock 10, and the signal receiving amplifier 40 is installed on the whipstock 10 through a sealing thread, the signal receiving amplifier 40 surrounds the gyroscope 31 and / or the timed switch valve 27 (specifically, the electromagnetic control valve 274), and the signal receiving amplifier 40 is used to receive and amplify the uphole wireless signal and transmit it to the gyroscope 31 and the electromagnetic control valve 274, respectively.

[0075] In use, the timed setting whipstock needs to be assembled first, and then set, which will be described in detail below.

[0076] The assembly process of the timed setting whipstock is as follows:

[0077] (1) First, install each O-ring and a fixed pin 26 in the cylinder barrel 212, then slowly pass the piston rod 211 through the rod cavity of the cylinder barrel 212, screw the piston 214 with the installed O-ring onto the piston rod 211, and then slowly pull it into the bottom of the cylinder barrel 212.

[0078] (2) Align the fixed pin 26 with the specified position of the piston rod 211, and push the fixed pin 26 from outside to inside to fix the piston rod 211.

[0079] (3) Install the threaded sealing joint, the first fluid line 271 and the second fluid line 272 in the space formed by the hollow cavity section of the barrel 21 and the hollow cavity of the guide 10, then slowly sleeve the bottom of the upper barrel into the upper part of the cylinder barrel 212, rotate the cylinder barrel 212 and the piston 214, piston rod 211 assembly after completely sleeving, ensure the threaded connection between the upper barrel and the cylinder barrel 212, then connect the second fluid line 272 with the cylinder barrel 212.

[0080] (4) Connect the fluid switch valve 273 with the upper barrel and the first fluid line 271, then connect the electromagnetic control valve 274 and the control valve core 275 with the fluid switch valve 273, then pass the lower barrel through the piston rod 211 and connect it with the upper barrel.

[0081] (5) Then connect the gas pump cavity with the lower half of the first fluid line 271, sleeve the battery pack 32 on the upper part of the gas pump cavity and fix it on the upper end of the cylinder barrel 212, at the same time, connect the battery pack 32 with the electromagnetic control valve 274, then fix the gyroscope 31 on the upper part of the gas pump cavity.

[0082] (6) Screw the signal receiving amplifier 40 into the housing of the guide 10, then connect the housing of the guide 10 with the upper barrel, then sleeve the lower barrel into the piston rod 211 and connect it with the upper barrel, then use the rotating pin 25 and the rotating pin nut to fix the slips 23 around the whipstock 22, then connect the whipstock 22 with the piston rod 211, then install the spring 24, fix the slips 23 in the vertical direction, and make the slips 23 tightly adhere to the outside of the lower barrel.

[0083] The setting process of the timing setting whipstock is as follows:

[0084] i. Use the electromagnetic control valve 274 to set the timing in advance, then use the corresponding pipe column to lower the assembled timing setting whipstock to the designated position downhole, rotate the timing setting whipstock to the designated orientation, the gyroscope 31 transmits signals through the signal receiving amplifier 40, then use the controller on the well to transmit the signals to the signal receiving amplifier 40, and then to the electromagnetic control valve 274.

[0085] ii. Or after waiting for a specified time, the current from the battery pack 32 to the electromagnetic control valve 274 rapidly increases, the electromagnetic control valve 274 lifts the control valve core 275, opens the fluid switch valve 273, and the high-pressure fluid downhole flows from the upper barrel, through the threaded sealing joint, the first fluid line 271, the fluid switch valve 273, the second fluid line 272 to the rod cavity of the piston pump in turn.

[0086] ⅲ. With the fluid pressure in the piston pump rod cavity gradually increasing, the fixed pin 26 is out of contact with the piston rod 211 due to the difference between the internal and external forces, and the high-pressure fluid in the piston pump rod cavity pushes the piston 214 to move upward, while driving the piston rod 211 to move upward, the piston rod 211 is stretched upward to drive the guide slope 22 to move upward, and the slip 23 is guided by the outer side wall surface of the lower cylinder, so that the slip 23 expands outward while moving upward, when the slip 23 contacts the well wall, the piston 214 stops moving upward, and the timing packer whipstock completes the setting.

[0087] Finally, it should be noted that those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for implementing the present application, and in actual application, various changes can be made in form and detail without departing from the spirit and scope of the present application.

Claims

1. A timing setting whip-lay device, applied to downhole casing, comprising at least a whip-lay part (10) and a setting part (20) arranged and connected in an up-down manner, both of which form a structure with a hollow cavity, characterized in that, A driving member is arranged in the hollow cavity and is driven by downhole fluid to expand the setting part (20) radially to engage the casing; A controller is further arranged to control the timing of the driving member; The setting part (20) comprises a barrel (21) and a whipstock (22) arranged in sequence and spaced apart, and a plurality of slips (23) are arranged between the barrel (21) and the whipstock (22), one end of the slip (23) is connected to the whipstock (22), and the other end is attached to the barrel (21); When the downhole fluid enters the barrel (21) and the controller commands to start the driving member, the slip (23) moves upward along the outer wall of the barrel (21) to make all the slips (23) radially expand to engage the casing; The inner part of the barrel (21) is a hollow cavity section and a solid column section, the solid column section is provided with a through hole for the piston rod (211) to pass through and a liquid delivery channel (213) for guiding the downhole fluid into the hollow cavity section; A cylinder (212) is arranged in the space formed by the hollow cavity section of the barrel (21) and the hollow cavity of the whipstock (10), and the downhole fluid stored in the hollow cavity section drives the piston rod (211) to push the piston (214) installed at the top end of the piston rod (211) to move inside the cylinder (212); The bottom end of the piston rod (211) is connected to the whipstock (22); When the piston rod (211) moves upward, the piston rod (211) drives the slip (23) to move upward; The lower end of the cylinder (212) is sealingly inserted into the hollow cavity of the barrel (21), and the piston (214) divides the inner cavity of the cylinder (212) into a rod cavity and a rodless cavity, the downhole fluid from the hollow cavity of the barrel (21) is stored in the rod cavity to change the fluid pressure of the rod cavity and drive the piston (214) to move; A plurality of fixed pins (26) are arranged in the rod cavity, one end of each fixed pin (26) is embedded in the cylinder wall of the cylinder (212), and the other end abuts against the piston rod (211); The piston rod (211) and the piston (214) constitute the driving member, the driving member further comprises a timing switch valve (27), the downhole fluid from the hollow cavity of the barrel (21) enters the first valve port of the timing switch valve (27) through the first fluid pipeline (271), and the second valve port of the timing switch valve (27) is connected to the rod cavity of the cylinder (212) through the second fluid pipeline (272); Downhole fluid entering the hollow cavity of the barrel (21) through the infusion channel (213) flows into the rod cavity of the cylinder (212) through the first fluid line (271) and the second fluid line (272) in turn. Due to the gradually increasing pressure difference between the inside and outside of the rod cavity, the fixed pin (26) is loosened and separated from the piston rod (211), the piston (214) drives the piston rod (211) to move upward, the piston rod (211) drives the whipstock (22) to move upward, and the slip (23) expands radially and clamps the casing while moving upward.

2. The timed-set packer of claim 1, wherein, A spring (24) is arranged between each slip (23) and the whipstock (22), one end of the spring (24) is connected to the slip (23), and the other end is connected to the whipstock (22).

3. The timed-set packer of claim 1, wherein, The controller includes an uphole part and a downhole part, wherein the uphole part is a PLC, and the downhole part includes a gyroscope (31) and a battery pack (32) installed in the hollow cavity of the whipstock (10); the gyroscope (31) is used to detect the rotation angle of the timing setting whipstock and send it to the PLC of the uphole part, and the PLC of the uphole part sends switch instructions to the timing switch valve (27) to open or close the timing switch valve (27); Alternatively, The battery pack (32) is preset to instantaneously increase the current to the timing switch valve (27) for a specified time, and the timing switch valve (27) is opened or closed.

4. The timed-set packer of claim 3, wherein, A signal receiving amplifier (40) is installed on the whipstock (10), which surrounds and aligns with the gyroscope (31) and / or the timing switch valve (27).

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