An ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing

Abstract

This invention discloses an ultra-high temperature corrosion-resistant mechanical packer suitable for use with coiled tubing, comprising a sealing seat and a sealing head, wherein the sealing head and sealing seat are connected by a helical toothed outer cylinder. The sealing head comprises an anchoring structure, a coiled tubing sealer, and a slip locking sleeve connected in sequence, wherein the helical toothed outer cylinder and the coiled tubing sealer are connected together. By changing the packer material, the structure of the device is further modified, effectively solving the problem of achieving a good sealing effect that existing technologies cannot achieve, thereby improving the cementing process by changing the sealing method. Therefore, this invention effectively isolates corrosive media in the producing formation from contact with the upper tubing body through a high-temperature resistant mechanical packer, significantly reducing the material grade of the tubing, slowing down the corrosion rate and degree, effectively extending the service life of the tubing string, ensuring wellbore integrity, and significantly reducing well construction costs.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field completion tool technology, specifically to an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing. Background Technology

[0002] Existing packers mainly use rubber sealing rings, which can withstand temperatures up to 250°C. They are also prone to aging in hydrogen sulfide environments and cannot achieve effective sealing over a long period of time. There are currently no reports on packer tools that are suitable for the aforementioned high-temperature and corrosive conditions. Furthermore, most existing packers can be desealed and are all expansion seals.

[0003] In oil and gas field development, to improve recovery rates, heating processes such as formation heating and steam injection are often employed to alter reservoir seepage channels and crude oil properties, thereby increasing single-well production. In certain specialized heating recovery processes, the operating temperature of the heat source well is 550–700℃, with a bottom hole pressure reaching approximately 20–40 MPa. The wellbore temperature of the oil and gas production well is 350–400℃, with a bottom hole flowing pressure of 2–5 MPa. Both the heat source well and the production well operate in ultra-high temperature and high temperature environments. The predicted produced fluids from the reservoir contain corrosive media such as H2S and CO2. The natural gas composition shows an H2S content ≥10%, a CO2 content ≥8%, and the potential presence of elemental sulfur. The predicted average water cut is 11.7–17.0%, with a Cl- content in the produced water ≥32.5 g / L. In this high-temperature, complex corrosive environment, the corrosion types of the oil casing are completely different from those faced by conventional oil and gas field wellbores. Conventional SSCC caused by H2S and electrochemical corrosion caused by CO2 may transform into high-temperature corrosion and electrochemical corrosion caused by sulfur deposition. Based on the development experience of high H2S gas reservoirs in Sichuan, China, the corrosion rate can reach 0.968-2.566 mm / a in the presence of sulfur deposition, indicating severe corrosion.

[0004] For such a complex corrosive environment with extremely high temperatures and corrosive gases containing H2S and CO2, based on existing domestic and international material selection standards such as NACEMR0175-2015, ISO15156-2015 "General Principles for the Selection of Crack-Resistant Materials", GB / T20972 "Materials for Oil and Gas Extraction in Hydrogen Sulfide Environments in the Oil and Gas Industry", SY / T6268-2017 "Recommended Practices for the Selection of Casing and Tubing", APISpec5CT "Oil and Gas Industry - Casing and Tubing Specification", and SY / T 6896.3-2016 "Technical Specifications for Special Pipes in the Oil and Gas Industry - Part 3: Titanium Alloy Tubing", ordinary carbon steel, Cr-containing stainless steel, and nickel-based alloys cannot meet the working conditions. Titanium alloys and cobalt-based alloys are required. However, there are few manufacturers of these types of pipes, and their prices are 20 to 40 times that of ordinary carbon steel, making them expensive and economically unapplicable.

[0005] CN101506559A discloses a high-temperature completion plug for sealing a cylindrical channel passing through a workpiece. It is a metal-to-metal seal that does not rely on elastic materials, suggesting its applicability in high-temperature wellbore conditions, but without specifying clear conditions of application. This completion plug is primarily used for temporary sealing of wellhead tool passages. CN203939478U discloses a hydraulically expandable high-temperature completion packer, which directly expands the expansion tube hydraulically, eliminating the need for a dedicated expansion head. CN102094594A discloses a fully enclosed downhole oil layer device for steam-driven wells. It consists of a release mechanism, a high-temperature resistant packer, and an anchoring structure.

[0006] In practical applications, high-temperature packers are widely used in oil and gas field development, but their operating temperature is mostly below 300℃, and generally does not exceed 250℃. Publicly available patents for high-temperature completion tools (≥200℃) mainly focus on design and improvements in setting methods, throughput, and setting reliability, which are not suitable for the special requirements of ultra-high temperature (≥500℃) and corrosion resistance in oilfield wells. Summary of the Invention

[0007] To address the problems of existing technologies, such as inability to withstand high temperatures and hydrogen sulfide corrosion, and the inability to release expansion seal packers, this invention provides an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing.

[0008] The present invention is achieved through the following technical solution: an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing, comprising a sealing seat and a sealing head, wherein the sealing head and the sealing seat are connected by a helical toothed outer cylinder, and the sealing head comprises an anchoring structure, a coiled tubing sealer and a slip locking sleeve connected in sequence, wherein the helical toothed outer cylinder and the coiled tubing sealer are connected.

[0009] Furthermore, the coiled tubing sealer includes a first sealing sleeve, a split sealing head, and a stop sleeve; the split sealing head is disposed on the outside of the coiled tubing, the first sealing sleeve is disposed on the outside of the split sealing head, the stop sleeve is disposed on the split sealing head, and the first sealing sleeve is connected to a slip locking sleeve; one end of the first sealing sleeve is connected to the slip locking sleeve, and the other end is connected to the split sealing head.

[0010] Furthermore, the sealing seat is provided with a positioning guide structure.

[0011] Furthermore, the anchoring structure comprises a spring claw and a helical toothed outer cylinder; the stop sleeve and the helical toothed outer cylinder are connected, and the spring claw is disposed on the helical toothed outer cylinder and interacts with the sealing seat.

[0012] Furthermore, a V-shaped combined sealing structure is provided inside the sealing seat, and the V-shaped combined sealing structure is connected to the anchoring structure.

[0013] Furthermore, the coiled tubing is equipped with a locking and sealing mechanism, which is constituted by adding a tubing joint, a metal sealing body, and a non-metal sealing body.

[0014] Furthermore, the segmented sealing structure is made of flexible graphene, while the remaining structures are made of nickel-based heat-resistant and corrosion-resistant alloy materials.

[0015] Furthermore, the sealing seat is connected to the continuous oil pipe via a flat snap fastener.

[0016] Furthermore, a set of sealing sleeves is provided at each end of the packer.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] This invention provides an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing. By changing the packer material, the structure of the device is further altered, effectively solving the problem of achieving a good sealing effect that existing technologies cannot achieve. This improves the cementing process by changing the sealing method. Therefore, this invention effectively isolates corrosive media in the producing formation from contact with the upper tubing body through a high-temperature resistant mechanical packer, significantly reducing the material grade of the tubing, slowing down the corrosion rate and degree, effectively extending the service life of the tubing string, ensuring wellbore integrity, and significantly reducing well construction costs.

[0019] Furthermore, by restricting the rotation of the spiral toothed outer cylinder with a stop sleeve, the overall device control and locking are controlled, effectively ensuring the safety and stability of the device and cleverly solving the self-locking effect problem.

[0020] Furthermore, by using a short-circuit connection with the positioning guide structure, the drill pipe sealing positioner insert is automatically positioned on the packer guide short-circuit during cementing. The lower sealing head ensures a seal within the packer sealing hole, preventing the sealing insert from contacting the casing plug. This positioning guide serves as a sealing and anchoring mechanism for the tubing connection; combined with the threads and large casing plug used in actual operations, it effectively ensures the cleanliness of the sealing seat, guaranteeing the safety, stability, and accuracy of the device during operation.

[0021] Furthermore, the split-type sealing head, when in the setting state, achieves a seal between the packer and the coiled tubing after the coiled tubing and the first sealing sleeve are assembled, forming a sealed space between the packer and the coiled tubing. The stop sleeve is used to limit the position of the first sealing sleeve. After the seal between the packer and the coiled tubing is confirmed, the slip locking device is controlled to stop operating, completing the connection and sealing between the packer and the coiled tubing. After the packer is set in the well, the spring claw, under the action of the spring claw, pushes the outer cylinder of the helical gear to rotate through a certain downward pressure, achieving the sealing and anchoring of the outer cylinder of the helical gear and the casing sealing seat. The sealing space is achieved through the spring claw and the packer sealing seat. After the packer and the sealing seat are set, the sealing space between the packer and the casing is achieved through the outer cylinder of the helical gear. Moreover, the outer cylinder of the helical gear has the ability to rotate on its own. After rotation, the outer cylinder of the helical gear and the sealing seat achieve sealing and anchoring, forming a sealed space between the packer and the casing.

[0022] Furthermore, the V-shaped combined sealing structure effectively ensures the sealing effect of the sealing space between the anchoring structures.

[0023] Furthermore, the locking and sealing mechanism further enhances the sealing effect of the device and ensures ease of operation during the overall operation process.

[0024] Furthermore, by changing the overall material and using graphene only on the segmented sealing structure, the technical performance of the device can be effectively guaranteed, enabling the device to ensure the sealing stability of the packer in high-temperature and corrosive environments.

[0025] Furthermore, the flat snap design between the sealing seat and the coiled tubing is used to receive the coiled tubing seal and anchor the matching coiled tubing packer.

[0026] Furthermore, the sealing sleeves at both ends are designed to achieve a seal between the packer and the coiled tubing. After the packer is set in the well, the sealing sleeve at one end achieves a double seal between the packer, the coiled tubing, and the sealing seat, while ensuring the sealing space between the packer and the sealing seat.

[0027] Furthermore, by effectively isolating high-temperature, highly corrosive fluids within the oil reservoir's producing layer through the structural design of this invention, the temperature and corrosion resistance standards for the upper casing and tubing in heavy oil thermal recovery and fire-driven oilfields can be significantly reduced, thereby substantially lowering the development costs of such reservoirs. Simultaneously, compared to existing rubber-sleeve elastic sealing packers on the market, the sealing performance is more reliable and has a longer lifespan, significantly improving wellbore integrity. This invention also effectively isolates corrosive media within the producing layer from contact with the upper casing and tubing body, significantly reducing the material grade of the casing and tubing, slowing down the corrosion rate and extent, effectively extending the service life of the tubing string, ensuring wellbore integrity, and substantially reducing well construction costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing, provided by an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the sealing seat of an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing, provided by an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the sealing head of an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing, provided by an embodiment of the present invention.

[0032] Figure 4 This invention provides a schematic diagram of the structure of a packer for an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing.

[0033] Figure 5 This is a schematic diagram of the anchoring structure of an ultra-high temperature corrosion-resistant mechanical packer suitable for use in coiled tubing, provided by an embodiment of the present invention.

[0034] In the diagram: 1-First sleeve, 2-Second sleeve, 3-Locking sleeve, 4-First sealing sleeve, 5-Split sealing head, 6-Stop sleeve, 7-Spring claw, 8-Helical toothed outer cylinder, 9-Sealing seat, 10-Mandrel, 11-V-type combined sealing structure, 12-Second sealing sleeve, 13-Graphite disc, 14-Locking sleeve, 15-Third sleeve. Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] To ensure the sealing stability of the packer in high-temperature and corrosive environments, all components of the sealing head do not use rubber materials.

[0042] The coiled tubing sealer is used to achieve the purpose of sealing the packer and the coiled tubing under high temperature and high pressure.

[0043] The sealing seat consists of three parts: a positioning guide short joint, a sealing anchor thread, and a large rubber plug for the casing. It is used to receive the sealing and anchoring mechanism of the oil pipe connection.

[0044] The sealing seat anchor consists of three parts: spring claw 7, spiral toothed outer cylinder 8, and graphite packing 13. It is configured to radially compressibly engage with the surface of the V-shaped sealing structure inside the sealing seat.

[0045] When the packer and coiled tubing sealer are assembled on the ground, the first sealing sleeve 4 is located between the slip locking sleeve 3 and the split sealing head 6; the slip locking sleeve 3 and the first sealing sleeve 4 are connected by threads.

[0046] The sealing seat 9 is run in with the casing during cementing. The sealing seat and casing are connected by a flat snap fastener, and it is used to receive and seal the coiled tubing and to anchor the coiled tubing packer. Each end of the packer has a set of sealing sleeves to achieve a seal between the packer and the coiled tubing. After the packer is set in the well, the sealing sleeves simultaneously achieve a double seal between the packer and the coiled tubing and the sealing seat, creating a sealed space between the packer and the sealing seat.

[0047] When the split sealing head 5 is in the setting state, it is located between the coiled tubing and the sealing sleeve. After assembly, it achieves a seal between the packer and the coiled tubing, forming a sealing space between the packer and the coiled tubing.

[0048] The stop sleeve 6 is used to limit the position of the sealing sleeve. After the packer and the coiled tubing are sealed, the control slip locking device is stopped, thus completing the connection and sealing between the packer and the coiled tubing.

[0049] After the packer is set in the well, the spring claw 7, under the action of the spring claw 7, pushes the spiral toothed outer cylinder 8 to rotate by a certain downward pressure, thereby achieving the sealing and anchoring of the spiral toothed outer cylinder 8 and the sealing seat 9, and creating a sealed space between the spring claw 7 and the packer sealing seat.

[0050] The spiral toothed outer cylinder 8, after completing the setting of the packer and the sealing seat 9, realizes the sealing space between the packer and the sleeve. The spiral toothed outer cylinder 8 has self-rotation. After self-rotation, the spiral toothed outer cylinder 8 and the sealing seat achieve sealing and anchoring, forming a sealing space between the packer and the sleeve.

[0051] The top of the sealing seat 9 is designed with a guide short connector. During cementing, the drill pipe sealing locator insert is automatically positioned on the packer guide short connector, and the lower sealing head ensures that it is sealed within the packer sealing hole, preventing the sealing insert from touching the casing plug. The sealing insert structure includes a V-shaped combined sealing structure 11 at the lower end of the packer and sealing seat. When the packer is set, this sealing structure, along with the sealing sleeve and sealing seat, creates a sealing space between the packer and the sealing seat. A locking sealing mechanism is provided, consisting of a tubing connector, a helical toothed outer cylinder 8, a spring claw 7, a metal sealing body, and a non-metallic sealing body. Its unsealing mechanism is a lifting unsealing; by lifting the continuous tubing, the spring claw relaxes, allowing the helical toothed outer cylinder 8 to rotate and unseal the packer sealing seat.

[0052] The spiral toothed outer cylinder 8 in the sealing tube structure has at least five sets of integral arc-shaped flanges extending outward in a petal-like pattern on its outer sealing surface. The V-shaped combination seal is formed by the V-shaped teeth on the mandrel and the sealing grooves on the sealing seat.

[0053] In another embodiment of the ultra-high temperature corrosion-resistant mechanical packer for use in coiled tubing proposed in this invention, it consists of two main parts: a sealing seat and a sealing head; together they form a high temperature corrosion-resistant packer. The sealing seat consists of a helical toothed outer cylinder 8 and a sealing seat 9. The sealing head consists of a stop sleeve 6, a helical toothed outer cylinder 8, a spring claw 7, a mandrel 10, a V-type combined seal 11, and a second sealing pressure sleeve 12.

[0054] The sealing seat is composed of a spiral outer cylinder 8 and a sealing seat 9. During use, it is lowered along with the casing. After the casing is lowered, cementing is performed. The cemented casing is stable and reliable. After the casing is lowered and cemented, the sealing head is assembled to form a packer structure. The sealing head assembly consists of a first sealing sleeve 4, a split sealing head 5, a spring claw 7, a spiral toothed outer cylinder 8, a mandrel 10, a V-shaped combination seal 11, and a second sealing sleeve 12. When the tubing is lowered, the sealing seat 9 is inserted. During insertion, the V-shaped seal combination 11 is inserted into the sealing hole, and the metal step contacts the sealing metal step. The spring claw 8 elastically jumps into the nut of the sealing seat 9. At the same time, the rotating sleeve 5 rotates on the rotating outer cylinder 6, tightly hooking the spring claw into the nut of the sealing seat 9 to ensure a reliable metal-to-metal seal and prevent it from retracting. When unsealing, simply turn the oil pipe clockwise. The pin of the rotating sleeve 5 will be cut off. The rotation of the oil pipe will not cause the rotating sleeve to rotate. Instead, the spring pawl will be released from the nut of the sealing seat by clockwise rotation and separate from the sealing seat 9, allowing the sealing seat 9 to be lifted out of the ground.

[0055] This invention employs a metal seal, which effectively prevents the device from expanding under applied pressure. The process involves three steps: First, the sealing seat is lowered into the well along with the casing. Second, the sealing plug is fixed to the middle of the coiled tubing, inserted into the sealing seat, and locked in place; it will not detach or move until the operation is complete. Third, when unsealing is required, the tubing string is simply pulled up, separating the sealing head from the sealing seat and bringing it out of the wellhead. During cementing operations, the metal-sealed packer, through the sealing seat provided by this device, ensures the device's sealing performance. Special cementing operations are required, and the specific steps are as follows:

[0056] Step 1: Connect the packer sealing seat and casing rubber plug into the casing string and lower it to the bottom of the well. The depth of the packer sealing seat should correspond to the packer setting position.

[0057] Step 2: Lower the drill pipe along with the cementing casing and insert it into the sealing seat; the drill pipe rubber plug passes through the drill pipe from the ground to the large rubber plug (casing rubber plug).

[0058] Step 3: Pressurize the surface, the small rubber plug drives the large rubber plug, which is pulled off and moved down from the casing sealing seat; cementing is completed.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. An ultra-high temperature corrosion resistant mechanical packer suitable for use with coiled tubing, characterized by, The sealing seat (9) and the sealing head are connected through the spiral tooth outer cylinder (8), the sealing head comprises an anchoring structure, a coiled tubing sealer and a slip locking sleeve (3) connected in sequence, wherein the spiral tooth outer cylinder (8) is connected with the coiled tubing sealer; The coiled tubing sealer comprises a first sealing pressure sleeve (4), a split sealing head (5) and a stop sleeve (6); the split sealing head (5) is arranged outside the coiled tubing, the first sealing pressure sleeve (4) is arranged outside the split sealing head (5), the stop sleeve (6) is arranged on the split sealing head (5), and the first sealing pressure sleeve (4) is connected with the slip locking sleeve (3); one end of the first sealing pressure sleeve (4) is connected with the slip locking sleeve (3), and the other end is connected with the split sealing head (5); The anchoring structure comprises a spring claw (7) and the spiral tooth outer cylinder (8); the stop sleeve (6) and the spiral tooth outer cylinder (8) are connected, and the spring claw (7) is arranged on the spiral tooth outer cylinder (8) and interacts with the sealing seat (9); The sealing seat (9) is provided with a V-shaped combined sealing structure (11) inside; the V-shaped combined sealing structure (11) is connected with the anchoring structure; The outer sealing surface of the spiral tooth outer cylinder (8) has at least five groups of integral arc-shaped flanges extending outward in the shape of petals; the V-shaped combined sealing structure is formed by the V-shaped teeth on the mandrel and the sealing teeth groove on the sealing seat; When cementing, the sealing seat (9) is lowered into the casing; after the casing is lowered and cementing is completed, the sealing head is assembled to form a packer structure, and the first sealing pressure sleeve (4), the split sealing head (5), the spring claw (7), the spiral tooth outer cylinder (8), the mandrel (10), the V-shaped combined sealing structure (11) and the second sealing pressure sleeve (12) form a sealing head assembly; when the tubing is lowered, the sealing seat (9) is inserted; during the insertion process, the V-shaped combined sealing structure (11) is inserted into the sealing hole, and the metal step contacts the metal step; the spring claw elastically jumps into the nut of the sealing seat (9); at the same time, the rotating sleeve rotates on the rotating outer cylinder; the spring claw tightly hangs on the nut of the sealing seat (9), so that the metal-to-metal sealing is reliable, and the spring claw cannot be pulled back; when the seal is released, the tubing is directly rotated to the right, the pin of the rotating sleeve is cut, the rotation of the tubing cannot rotate the rotating sleeve, the spring claw is rotated in the nut of the sealing seat, and the sealing seat (9) is separated from the sealing seat (9), so that the sealing seat (9) is pulled out of the ground; The packer adopts metal sealing.

2. A super-temperature corrosion resistant mechanical packer suitable for use with coiled tubing as claimed in claim 1, wherein, The sealing seat (9) is provided with a positioning guide structure.

3. A super-temperature corrosion resistant mechanical packer suitable for use with coiled tubing as defined in claim 1, wherein, The coiled tubing is provided with a locking and sealing mechanism, which is composed of an added tubing joint, a metal sealing body and a non-metal sealing body.

4. A super-temperature corrosion resistant mechanical packer suitable for use with coiled tubing according to claim 1, characterized in that, The split sealing head (5) is made of flexible graphene material, and the remaining structures are made of nickel-based heat-resistant and corrosion-resistant alloy material.

5. A super-temperature corrosion resistant mechanical packer suitable for use with coiled tubing as defined in claim 1, wherein, The sealing seat (9) is connected with the coiled tubing through a flat buckle.

6. An ultra-high temperature corrosion resistant mechanical packer suitable for coiled tubing use according to claim 1, wherein, Each end of the packer is provided with a set of sealing pressure sleeves.

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