Large-drift-diameter high-temperature high-pressure high-bearing suspension well completion packer

Abstract

The utility model relates to the technical field of oil development underground equipment, and discloses a large-drift-diameter high-temperature high-pressure high-bearing suspension well completion packer. Comprising a packing sealing system assembly, a locking system assembly, a piston hydraulic transmission system assembly, a high-bearing slip anchoring system assembly and a release claw release system assembly which are sequentially arranged on the outer wall of a central pipe in a sleeving mode from top to bottom and detachably connected through threads. The large-drift-diameter high-temperature high-pressure high-bearing suspension well completion packer is large in drift diameter, resistant to high temperature, resistant to high pressure difference and high in bearing capacity, and open hole section suspension supporting and acid fracturing well completion construction can be completed through one pipe column.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil development downhole equipment technical field, concretely relates to a big drift high temperature high pressure high bearing suspension completion packer. BACKGROUND

[0002] In the oil and gas reservoir development, in order to prevent the collapse of open hole wall during production, the lower open hole adopts the suspension packer + well wall support string completion mode, generally, first, a trip of suspension support string is lowered to form high bearing suspension anchoring, then the upper string is released and pulled out, and then a trip of reservoir reconstruction acid fracturing completion string is lowered to complete the well, which meets the sealing of casing annulus, the isolation of target zone and the control of injection or production fluid with big drift, high temperature resistance, high pressure resistance and high bearing.

[0003] In addition, the general suspension completion packer in the market has the problems of small inner drift, low anchoring load, low temperature and pressure resistance, easy anchoring slip and sealing rubber cylinder pressure failure, etc., which leads to packer sealing failure, resulting in well completion reconstruction failure, and even serious production safety accidents. SUMMARY

[0004] The utility model discloses a big drift high temperature high pressure high bearing suspension completion packer, which has big drift, high temperature resistance, high pressure resistance and high bearing, and can realize the suspension support and acidizing fracturing completion construction of open hole section with one string.

[0005] To achieve the above object, the big drift high temperature high pressure high bearing suspension completion packer designed by the utility model comprises a sealing system assembly, a locking system assembly, a piston hydraulic transmission system assembly, a high bearing slip anchor system assembly and a release claw release system assembly, which are sequentially sleeved on the outer wall of the central pipe from top to bottom and are detachably connected through threads.

[0006] Preferably, the sealing system assembly comprises an upper guide ring, a rubber cylinder assembly and a lower guide ring, which are sequentially sleeved on the outer wall of the central pipe from top to bottom, the upper guide ring and the lower guide ring are connected through thread interference, the upper end of the upper guide ring is connected with the positioning boss arranged on the upper end of the central pipe through thread, and the upper guide ring is fixed with the central pipe through the first set pin, the lower end of the lower guide ring is connected with the positioning boss of the cylinder sleeve sleeved on the central pipe through thread, and the lower guide ring is fixed with the cylinder sleeve through the second set pin.

[0007] Preferably, the rubber sleeve assembly comprises a middle rubber sleeve sleeved on the outer wall of the center tube, end rubber sleeves located at both ends of the middle rubber sleeve, and a support back ring located outside the end rubber sleeves and clamping the end rubber sleeves, the outer wall of the center tube is provided with a retaining ring for positioning the middle rubber sleeve at the position of the middle rubber sleeve, the outer wall of the center tube is provided with a rubber sleeve separation ring at the position between the middle rubber sleeve and the end rubber sleeve, the outer wall of the center tube is provided with a drill-proof ring at the position between the end rubber sleeve and the support back ring, and the upper guide ring and the lower guide ring are connected with the support back ring through threaded interference.

[0008] Preferably, the support back ring adopts a bowl-shaped structure, the drill-proof ring adopts a triangular cross-section ring structure, the end rubber sleeve adopts a bowl-shaped structure and has a higher hardness than the middle rubber sleeve which is internally designed with a semicircular groove convex structure, the rubber sleeve separation ring adopts a Z-shaped structure, the retaining ring adopts a semicircular cross-section ring structure, the end rubber sleeve and the middle rubber sleeve both adopt a fluororubber material, and the drill-proof ring adopts a polyether ether ketone material.

[0009] Preferably, the piston hydraulic transmission system assembly comprises the lower guide ring and a lower piston sleeved on the center tube, the lower piston is located inside the cylinder sleeve, a limiting split ring sleeved on the center tube is arranged between the lower guide ring and the lower piston, the limiting split ring is installed in a ring groove of the center tube and fixed through a rubber ring, first pressure transmission holes are arranged on both sides of the limiting split ring, second pressure transmission holes are arranged on the wall of the center tube, the second pressure transmission holes communicate with the inner hole of the center tube, and the first pressure transmission holes of the limiting split ring connect the piston cavity of the lower guide ring and the lower piston.

[0010] Preferably, a first O-shaped sealing ring and a group of first O-shaped ring stoppers are arranged between the lower guide ring and the cylinder sleeve, two second O-shaped sealing rings and two groups of second O-shaped ring stoppers are arranged between the lower guide ring and the center tube, two first O-shaped sealing rings and two groups of first O-shaped ring stoppers are arranged between the lower piston and the cylinder sleeve, and two second O-shaped ring stoppers and two groups of second O-shaped ring stoppers are arranged between the lower piston and the center tube.

[0011] Preferably, the locking system assembly comprises a lock ring seat installed on the lower piston, a lock ring is arranged between the lower piston and the lock ring seat, the lock ring adopts a C-shaped double-sided thread structure with an inner-outer profiled sparse and dense one-way tooth, can only move in one direction according to the set tooth direction, the inner side of the lock ring is threadedly locked with the lower piston, the outer side of the lock ring is connected with the lock ring seat through threads and is fixed through a rotation-preventing screw, the lock ring seat is threadedly connected with the cylinder sleeve and is provided with a first locking screw, a shearing sleeve is sleeved on the lower end of the center tube at the position of the lower piston, the lower piston is threadedly connected with the shearing sleeve and is provided with a second locking screw, and the lock ring seat and the shearing sleeve are fixedly connected through a piston starting pin.

[0012] Preferably, the high-bearing slip anchoring system assembly comprises an upper cone, a two-way integrated barrel-shaped elastic slip and a lower cone which are sequentially sleeved on the outer wall of the central pipe from top to bottom, the two-way integrated barrel-shaped elastic slip is integrated by the upper cone and the lower cone, the upper cone is in threaded connection with the shear sleeve, the inner part of the upper end of the upper cone is provided with a lower locking ring sleeved on the outer wall of the central pipe, the lower locking ring is directly provided with an anti-rotation screw with the upper cone, the lower end of the lower cone is in threaded connection with a lower joint connecting sleeve sleeved on the outer wall of the central pipe, the surface of the two-way integrated barrel-shaped elastic slip is provided with uniformly distributed and staggered cutting grooves, the outer side of the upper cone and the lower cone is provided with two uniformly distributed cutting grooves, the cutting grooves of the upper cone and the lower cone are in 90° offset opposite relationship, the upper cone, the lower cone and the corresponding cutting grooves of the two-way integrated barrel-shaped elastic slip are all provided with slip anti-rotation key blocks and are fixed by third set screws, the upper end of the two-way integrated barrel-shaped elastic slip and the upper cone are provided with an upper shear pin in threaded connection, the lower end of the two-way integrated barrel-shaped elastic slip and the lower cone are provided with a lower shear pin in threaded connection, the inner part of the lower cone and the central pipe are provided with a third O-shaped sealing ring and a third O-shaped sealing ring retainer, the outer circle of the lower part of the central pipe is provided with a sawtooth thread, the sawtooth thread is moved to the lower locking ring when the packer is recovered, and the lower locking ring is reversely engaged with the inner teeth of the lower locking ring, after engagement, the upper cone is driven to move upward to release the locking force of the two-way integrated barrel-shaped elastic slip and drive the two-way integrated barrel-shaped elastic slip to be recovered to release anchoring.

[0013] Preferably, the release claw release system assembly comprises the lower joint connecting sleeve and a release claw sleeved on the outer wall of the central pipe, the upper end of the release claw is in threaded connection with the central pipe, the lower end of the release claw is in threaded connection with the lower joint connecting sleeve, the lower end of the lower joint connecting sleeve is in threaded connection with a lower joint sleeved on the outer wall of the central pipe and is fixed by a fourth set screw, a fourth O-shaped sealing ring is arranged between the lower joint and the lower joint connecting sleeve, a release claw support is arranged in the release claw, and a release shear pin is arranged in a ring groove of the release claw support through a threaded hole of the release claw; the outer circle of the release claw support is provided with two fifth O-shaped sealing rings and forms a seal with the lower joint.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. Large diameter, high temperature resistance, high pressure difference resistance, high bearing;

[0016] 2. Two-way integrated barrel-shaped elastic slip structure, good anchoring performance;

[0017] 3. Can be better used in a trip string to realize suspension support, acidizing and fracturing and well completion construction. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the large-diameter high-temperature high-pressure high-bearing suspension well completion packer of the utility model;

[0019] Figure 2 It is a structure schematic view of the packer sealing system assembly;

[0020] Figure 3 It is a structure schematic view of the piston hydraulic transmission system assembly;

[0021] Figure 4 It is a structure schematic view of the locking system assembly;

[0022] Figure 5 It is a structure schematic view of the high-bearing slip anchoring system assembly;

[0023] Figure 6 It is a structure schematic view of the release claw release system assembly.

[0024] The reference signs of the components in the drawing are as follows:

[0025] The center pipe 1, the upper guide ring 2, the rubber cylinder assembly 3, the lower guide ring 4, the first locking pin 5, the cylinder sleeve 6, the second locking pin 7, the lower piston 8, the limiting split ring 9, the rubber ring 10, the first O-shaped sealing ring 11, the first O-shaped ring retainer 12, the second O-shaped sealing ring 13, the second O-shaped ring retainer 14, the locking ring seat 15, the locking ring 16, the anti-rotation screw 17, the first locking screw 18, the shearing sleeve 19, the second locking screw 20, the piston starting pin 21, the upper cone 22, the bidirectional integral barrel-shaped elastic slip 23, the lower cone 24, the lower locking ring 25, the anti-rotation screw 26, the lower joint connecting sleeve 27, the slip anti-rotation key block 28, the third locking screw 29, the middle rubber cylinder 31, the end rubber cylinder 32, the support back ring 33, the retaining ring 34, the rubber cylinder spacer ring 35, the anti-drilling ring 36, the upper shearing pin 41, the lower shearing pin 42, the third O-shaped sealing ring 43, the third O-shaped sealing ring retainer 44, the fourth O-shaped sealing ring 45, the release claw 46, the lower joint 47, the fourth locking screw 48, the release claw support body 49, the unsealing shearing pin 50, the fifth O-shaped sealing ring 51, the unsealing delivery tool 52. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0027] For example, Figure 1As shown, a large-diameter high-temperature high-pressure high-bearing suspension completion packer comprises, from top to bottom, a sealing system assembly, a locking system assembly, a piston hydraulic transmission system assembly, a high-bearing slip anchoring system assembly and a release claw release system assembly, which are sequentially sleeved on the outer wall of the central pipe 1 and are detachably connected with each other through threads.

[0028] In combination with Figure 1 and Figure 2 As shown, the sealing system assembly comprises, from top to bottom, an upper guide ring 2, a rubber sleeve assembly 3 and a lower guide ring 4, which are sequentially sleeved on the outer wall of the central pipe 1 and are connected through thread interference. The upper end of the upper guide ring 2 is in abutment with the positioning boss provided on the upper end of the central pipe 1 through threads, and the upper guide ring 2 is fixed with the central pipe 1 through the first set pin 5. The lower end of the lower guide ring 4 is in abutment with the positioning boss of the cylinder sleeve 6 sleeved on the central pipe 1 through threads, and the lower guide ring 4 is fixed with the cylinder sleeve 6 through the second set pin 7.

[0029] As shown in Figure 2 The rubber sleeve assembly 3 comprises a middle rubber sleeve 31 sleeved on the outer wall of the central pipe 1 and end rubber sleeves 32 located at both ends of the middle rubber sleeve 31, and a support back ring 33 provided outside the end rubber sleeves 32 and clamping the end rubber sleeves 32. The outer wall of the central pipe 1 is provided with a retaining ring 34 for positioning the middle rubber sleeve 31 at the position of the middle rubber sleeve 31. The outer wall of the central pipe 1 is provided with a rubber sleeve spacer ring 35 at the position between the middle rubber sleeve 31 and the end rubber sleeve 32. The outer wall of the central pipe 1 is provided with a drill-resistant ring 36 at the position between the end rubber sleeve 32 and the support back ring 33. The upper guide ring 2 and the lower guide ring 4 are connected through thread interference between the support back ring 33.

[0030] The support back ring 33 adopts a bowl-shaped structure, the drill-resistant ring 36 is a triangular cross-section ring structure, the end rubber sleeve 32 is a bowl-shaped structure, the hardness of the end rubber sleeve 32 is higher than that of the middle rubber sleeve 31 which is internally designed with a semicircular groove convex letter-shaped structure, the rubber sleeve spacer ring 35 is a Z-shaped structure, the retaining ring 34 is a semicircular cross-section ring structure, the end rubber sleeve 32 and the middle rubber sleeve 31 are made of fluororubber material, the drill-resistant ring 36 is made of polyether ether ketone material, and the entire rubber sleeve assembly 3 has adaptability, reliability and availability under severe and complex well conditions.

[0031] In combination with Figure 1 and Figure 3As shown, the piston hydraulic transmission system assembly includes a lower guide ring 4 and a lower piston 8 sleeved on the central pipe 1, the lower piston 8 is located inside the cylinder sleeve 6, a limiting split ring 9 sleeved on the central pipe 1 is arranged between the lower guide ring 4 and the lower piston 8, the limiting split ring 9 is installed in the ring groove of the central pipe 1 and is fixed by a rubber ring 10, the limiting split ring 9 is provided with a first pressure transmission hole penetrating through both sides, the central pipe 1 is provided with a second pressure transmission hole penetrating through the pipe wall, the second pressure transmission hole communicates with the inner hole of the central pipe 1, and the first pressure transmission hole of the limiting split ring 9 connects the piston cavity of the lower guide ring 4 and the lower piston 8, thereby ensuring the smoothness of the pressure channel of the packer and limiting the lower guide ring 4 and the lower piston 8.

[0032] As shown, a first O-shaped sealing ring 11 and a group of first O-shaped ring stoppers 12 are arranged between the lower guide ring 4 and the cylinder sleeve 6, two second O-shaped sealing rings 13 and two groups of second O-shaped ring stoppers 14 are arranged between the lower guide ring 4 and the central pipe 1, two first O-shaped sealing rings 11 and two groups of first O-shaped ring stoppers 12 are arranged between the lower piston 8 and the cylinder sleeve 6, and two second O-shaped ring stoppers 13 and two groups of second O-shaped ring stoppers 14 are arranged between the lower piston 8 and the central pipe 1, thereby ensuring the sealing and pressure bearing performance of the piston hydraulic transmission system assembly.

[0033] As shown, Figure 1 and Figure 4 As shown, the locking system assembly includes a lock ring seat 15 sleeved and installed on the lower piston 8, a lock ring 16 is arranged between the lower piston 8 and the lock ring seat 15, the lock ring 16 adopts a C-shaped double-sided thread structure with an inner and outer profiled sparse and dense one-way tooth, can only move in one direction according to the set tooth direction, the inner side of the lock ring 16 is threadedly locked with the lower piston 8, the lock ring seat 15 generates a radial holding force on the outer side of the lock ring 16 to maintain stable setting and locking force, the outer side of the lock ring 16 is threadedly connected with the lock ring seat 15 and is fixed by a anti-rotation screw 17, the lock ring seat 15 is threadedly connected with the cylinder sleeve 6 and is provided with a first locking screw 18, a shearing sleeve 19 is sleeved on the lower end of the lower piston 8 on the outer wall of the central pipe 1, the lower piston 8 is threadedly connected with the shearing sleeve 19 and is provided with a second locking screw 20, the lock ring seat 15 is fixedly connected with the shearing sleeve 19 through a piston starting pin 21, the lock ring seat 15 generates a radial holding force on the outer side of the lock ring 16 to maintain stable setting and locking force, which can effectively prevent the rubber tube assembly 3 and the bidirectional integral barrel-shaped elastic slipper 23 from being set and sealed after expansion anchoring, thereby ensuring the sealing and pressure bearing performance of the rubber tube assembly 3 and the anchoring bearing performance of the slipper, reducing the risk of sealing failure of the packer rubber tube and slippage of the anchoring slipper.

[0034] As shown, Figure 1 and Figure 5As shown, the high-bearing slip anchoring system assembly includes an upper cone 22, a two-way integrated barrel-shaped elastic slip 23 and a lower cone 24 which are sequentially sleeved on the outer wall of the central pipe 1 from top to bottom. The two-way integrated barrel-shaped elastic slip 23 is combined into one body through the upper cone 22 and the lower cone 24. The upper cone 22 is threadedly connected with the shear sleeve 19. The inner upper end of the upper cone 22 is provided with a lower locking ring 25 sleeved on the outer wall of the central pipe 1. The lower locking ring 25 is directly provided with an anti-rotation screw 26 with the upper cone 22. The lower cone 24 is threadedly connected with a lower joint connecting sleeve 27 sleeved on the outer wall of the central pipe 1. The surface of the two-way integrated barrel-shaped elastic slip 23 is provided with uniformly distributed and staggered cutting grooves. The outer sides of the upper cone 22 and the lower cone 24 are each provided with two uniformly distributed cutting grooves. The cutting grooves of the two are in a 90° offset opposite relationship. The upper cone 22, the lower cone 24 and the corresponding cutting grooves of the two-way integrated barrel-shaped elastic slip 23 are each provided with a slip anti-rotation key block 28 and are fixed through a third set screw 29. The upper end of the two-way integrated barrel-shaped elastic slip 23 and the upper cone 22 are provided with an upper shear pin 41 which is fixed in a threaded connection. The lower end of the two-way integrated barrel-shaped elastic slip 23 and the lower cone 24 are provided with a lower shear pin 42 which is fixed in a threaded connection. Meanwhile, the outer sides of the upper cone 22 and the lower cone 24 are each provided with multiple uniformly distributed threaded holes. In the running-in process, the fixation of the upper shear pin 41 and the lower shear pin 42 can effectively prevent the two-way integrated barrel-shaped elastic slip 23 from being prematurely set. The inner lower cone 24 and the central pipe 1 are provided with a third O-shaped sealing ring 43 and a third O-shaped sealing ring stop ring 44 which can effectively isolate and seal. The outer circle of the lower part of the central pipe 1 is provided with a sawtooth thread. The sawtooth thread is moved to the lower locking ring 25 and reversely engages with the inner teeth of the lower locking ring 25 when the packer is recovered. After engagement, the upper cone 22 is lifted to release the two-way integrated barrel-shaped elastic slip 23 to release the locking force and recover the two-way integrated barrel-shaped elastic slip 23 to release the anchoring.

[0035] In combination Figure 1 and Figure 6 As shown, the release claw release system assembly includes a lower joint connecting sleeve 27 and a release claw 46 sleeved on the outer wall of the central pipe 1. The upper end of the release claw 46 is threadedly connected with the central pipe 1. The lower end is threadedly connected with the lower joint connecting sleeve 27. The lower end of the lower joint connecting sleeve 27 is threadedly connected with a lower joint 47 sleeved on the outer wall of the central pipe 1 and is fixed through a fourth set screw 48. The lower joint 47 and the lower joint connecting sleeve 27 are provided with a fourth O-shaped sealing ring 45. The release claw 46 is internally provided with a release claw support 49. A release shear pin 50 is installed into the ring groove of the release claw support 49 through the threaded hole of the release claw 46. The outer circle of the release claw support 49 is provided with two fifth O-shaped sealing rings 51 and forms a seal with the lower joint 47. When the unsealing delivery tool 52 needs to unseal and recover the packer, it is placed in the tubing from the wellhead, on the upper part of the release claw support 49 and forms a surface seal with the release claw support 49.

[0036] In this embodiment, the upper end of the central tube 1 is provided with an oil pipe thread for connection to the oil pipe, the outer circle of the upper boss is provided with a trapezoidal thread for connection to the upper guide ring 2, the lower outer circle is provided with a sawtooth thread, and the lower end is provided with a trapezoidal thread for connection to the release claw 46. The sawtooth thread provided on the lower outer circle of the central tube 1 can move to the lower locking ring 25 and engage with the inner teeth of the lower locking ring 25 in the opposite direction when the packer is retracted. After engagement, the upper cone 22 moves upward to release the bidirectional integral barrel-shaped elastic slip 23 to release the locking force and drive the bidirectional integral barrel-shaped elastic slip 23 to retract and release the anchoring.

[0037] The working principle of this embodiment is described according to the sequential operation of the packer, and is divided into three working states: well entry, setting, and unsealing.

[0038] Well entry status: such as Figure 1 As shown, all components inside the packer are in their initial state. The number of piston starting pins 21 and unsealing shear pins 50 is adjusted according to the setting and unsealing force values ​​designed in the process. After the packer is directly connected to the tubing, it is lowered to the target layer.

[0039] Sealed state: such as Figure 1 and Figure 3 As shown, hydraulic pressure is applied from the ground through the oil pipe to the central pipe 1 to set the packer. The hydraulic pressure enters the chamber between the lower guide ring 4, cylinder liner 6, and lower piston 8 through the second pressure transmission hole, pushing the lower guide ring 4 upward and the lower piston 8 downward. After shearing the piston starting pin 21, the lower guide ring 4 drives the cylinder liner 6, locking ring seat 15, and locking ring 16 to move upward, squeezing the expansion seal of the rubber sleeve assembly 3 and the annular space gap between the expansion seal and the inner wall of the casing. At this time, the oil sleeve annular space is isolated. The lower piston 8 drives the shear sleeve 19, lower locking ring 25, upper cone 22, and bidirectional integral barrel-shaped elastic slip 23 to move downward. First, cut the lower shear pin 42 to make the lower end of the bidirectional integral barrel-shaped elastic slip 23 contact the sleeve. Then, cut the upper shear pin 41 to make the bidirectional integral barrel-shaped elastic slip 23 expand and anchor evenly in the circumferential direction to the inner wall of the sleeve. This ensures the integrity of the sealing performance of the rubber sleeve assembly 3 and the reliability of the anchoring performance of the bidirectional integral barrel-shaped elastic slip 23. The bidirectional integral barrel-shaped elastic slip 23 enables the packer to withstand both large suspended weight and high upward force. The lower guide ring 4 and the upper cone 22 are locked by the locking ring 16 and cannot move axially upward or downward. At this time, the packer completes the setting.

[0040] Unlocked status: such as Figure 1 and Figure 6As shown, by tubing down a special unblocking delivery tool 52, free fall to the release claw support 49 and form a seal, and then cut the unblocking shear pin 50 on the release claw support 49 by mechanical force or hydraulic pressure, the unblocking shear pin 50 falls into the lower joint 47; then the string central tube 1 is pulled up to separate the release claw 46 from the lower joint connecting sleeve 27, continue to pull up the central tube 1 to move the upper guide ring 2 to release the locking force of the rubber sleeve assembly 3 and make it retract and unblock, continue to pull up the central tube 1 to engage the lower locking ring 25 provided with sawtooth threads in the lower part of the outer circle, the lower locking ring 25 drives the upper cone 22 to move upward to release the locking force of the bidirectional integral barrel-shaped elastic slips 23 and drive the bidirectional integral barrel-shaped elastic slips 23 to be recovered to release the anchoring, and the whole packer unblocking is completed.

[0041] The utility model discloses a big drift high temperature high pressure high bearing suspension completion packer has the characteristics of big drift, high temperature resistance, high pressure difference resistance, high bearing, bidirectional integral barrel-shaped elastic slip structure, good anchoring performance, can be better used in one trip string to realize suspension support, acidification fracturing and completion construction.

[0042] Here, it should be noted that the description of the above technical solutions is exemplary, and the present specification can be embodied in different forms, and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the present disclosure complete and complete, and will fully convey the scope disclosed in the present specification to those skilled in the art. In addition, the technical solutions of the present application are only limited by the scope of the claims.

[0043] The aspects disclosed in the description and claims are only examples, therefore, the description and claims are not limited to the details shown. In the above description, when the detailed description of the related known functions or configurations is determined to be unnecessary to obscure the focus of the present specification and claims, the detailed description will be omitted.

[0044] Finally, it should be noted that the above content is a further detailed description of the utility model in combination with the specific implementation, and the specific implementation of the utility model should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, simple substitutions made without departing from the concept of the present application should be considered to belong to the protection scope of the present application. The above examples are only more representative examples of the present application. Obviously, the present application is not limited to the above examples, and there can be many variations. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above examples should be considered to belong to the protection scope of the present application.

Claims

1. A large-gauge, high-temperature, high-pressure, high-load hanging completion packer, characterized in that: The sealing system assembly, the locking system assembly, the piston hydraulic transmission system assembly, the high-bearing slip anchor system assembly and the release claw release system assembly are sequentially sleeved on the outer wall of the central pipe (1) and are detachably connected with each other through threads.

2. The large-passage high-temperature high-pressure high-load suspension completion packer according to claim 1, characterized in that: The sealing system assembly includes an upper guide ring (2), a rubber sleeve assembly (3) and a lower guide ring (4) which are sequentially sleeved on the outer wall of the central pipe (1) from top to bottom, and the upper guide ring (2) and the lower guide ring (4) are threadedly connected with the rubber sleeve assembly (3), the upper end of the upper guide ring (2) is threadedly connected with a positioning boss arranged on the upper end of the central pipe (1), and the upper guide ring (2) is fixed with the central pipe (1) through a first set pin (5), and the lower end of the lower guide ring (4) is threadedly connected with a positioning boss of a cylinder sleeve (6) sleeved on the central pipe (1), and the lower guide ring (4) is fixed with the cylinder sleeve (6) through a second set pin (7).

3. The large-pilot, high-temperature, high-pressure, high-load, hanger, completion packer of claim 2, wherein: The rubber sleeve assembly (3) includes a middle rubber sleeve (31) sleeved on the outer wall of the central pipe (1) and end rubber sleeves (32) arranged at both ends of the middle rubber sleeve (31), and a support back ring (33) arranged outside the end rubber sleeves (32) and clamping the end rubber sleeves (32), the outer wall of the central pipe (1) is provided with a retaining ring (34) for positioning the middle rubber sleeve (31) at the position of the middle rubber sleeve (31), the outer wall of the central pipe (1) is provided with a rubber sleeve spacer ring (35) at the position between the middle rubber sleeve (31) and the end rubber sleeve (32), the outer wall of the central pipe (1) is provided with a drill-proof ring (36) at the position between the end rubber sleeve (32) and the support back ring (33), and the upper guide ring (2) and the lower guide ring (4) are threadedly connected with the support back ring (33).

4. The large-passage, high-temperature, high-pressure, high-load suspension completion packer of claim 3, wherein: The support back ring (33) adopts a bowl-shaped structure, the drill-proof ring (36) is a triangular cross-section ring structure, the end rubber sleeve (32) is a bowl-shaped structure and has a higher hardness than the middle rubber sleeve (31) which is internally provided with a semicircular groove convex structure, the rubber sleeve spacer ring (35) is a Z-shaped structure, the retaining ring (34) is a semicircular cross-section ring structure, the end rubber sleeve (32) and the middle rubber sleeve (31) are made of fluororubber material, and the drill-proof ring (36) is made of polyether ether ketone material.

5. The large-pilot, high-temperature, high-pressure, high-load, hanger, completion packer of claim 2, wherein: The piston hydraulic transmission system assembly includes the lower guide ring (4) and a lower piston (8) sleeved on the central pipe (1), the lower piston (8) is located in the cylinder sleeve (6), a limiting split ring (9) sleeved on the central pipe (1) is arranged between the lower guide ring (4) and the lower piston (8), the limiting split ring (9) is installed in a ring groove of the central pipe (1) and is fixed through a rubber ring (10), first pressure transmission holes are arranged on both sides of the limiting split ring (9), a second pressure transmission hole is arranged on the pipe wall of the central pipe (1) and communicates with the inner hole of the central pipe (1), and the first pressure transmission hole of the limiting split ring (9) connects the piston cavity of the lower guide ring (4) and the lower piston (8).

6. The large-pore high-temperature high-pressure high-load suspension completion packer according to claim 5, characterized in that: The lower guide ring (4) and the cylinder sleeve (6) are provided with a first O-shaped sealing ring (11) and a set of first O-shaped ring stopper (12), the lower guide ring (4) and the center tube (1) are provided with two second O-shaped sealing rings (13) and two sets of second O-shaped ring stopper (14), the lower piston (8) and the cylinder sleeve (6) are provided with two first O-shaped sealing rings (11) and two sets of first O-shaped ring stopper (12), the lower piston (8) and the center tube (1) are provided with two second O-shaped sealing rings (13) and two sets of second O-shaped ring stopper (14).

7. The large-passage, high-temperature, high-pressure, high-load suspension completion packer of claim 5, wherein: The locking system assembly includes a lock ring seat (15) installed on the lower piston (8), the lower piston (8) and the lock ring seat (15) are provided with a lock ring (16), the lock ring (16) adopts a C-shaped double-sided thread structure with inner and outer different-shaped sparse and dense one-way teeth, according to the set tooth direction, only one-way movement can be carried out, the inner side of the lock ring (16) is threadedly locked with the lower piston (8), the outer side of the lock ring (16) is connected with the lock ring seat (15) through threads and is fixed by a anti-rotation screw (17), the lock ring seat (15) is threadedly connected with the cylinder sleeve (6) and is provided with a first locking screw (18), the outer wall of the center tube (1) is provided with a shearing sleeve (19) at the lower end of the lower piston (8), the lower piston (8) and the shearing sleeve (19) are connected through threads and are provided with a second locking screw (20), the lock ring seat (15) and the shearing sleeve (19) are fixedly connected through a piston starting pin (21).

8. The large-passage, high-temperature, high-pressure, high-load suspension completion packer of claim 7, wherein: The high bearing slip anchoring system assembly comprises an upper cone (22), a two-way integrated barrel-shaped elastic slip (23) and a lower cone (24) which are sequentially sleeved on the outer wall of the central pipe (1) from top to bottom, the two-way integrated barrel-shaped elastic slip (23) is combined into one body through the upper cone (22) and the lower cone (24), the upper cone (22) is threadedly connected with the shear sleeve (19), and the inner upper end of the upper cone (22) is provided with a lower locking ring (25) sleeved on the outer wall of the central pipe (1), the lower locking ring (25) is directly provided with an anti-rotation screw (17) with the upper cone (22), the lower cone (24) is threadedly connected with a lower joint connecting sleeve (27) sleeved on the outer wall of the central pipe (1), the surface of the two-way integrated barrel-shaped elastic slip (23) is provided with uniformly distributed and staggered cutting grooves, the outer sides of the upper cone (22) and the lower cone (24) are each provided with two uniformly distributed cutting grooves, the cutting grooves of the two are in a 90° offset opposite relationship, the upper cone (22) and the lower cone (24) are provided with slip anti-rotation key blocks (28) in the corresponding cutting grooves of the two-way integrated barrel-shaped elastic slip (23), and are fixed through the third set screw (29), the upper end of the two-way integrated barrel-shaped elastic slip (23) and the upper cone (22) are provided with an upper shear pin (41) which is fixed in a threaded connection, the lower end of the two-way integrated barrel-shaped elastic slip (23) and the lower cone (24) are provided with a lower shear pin (42) which is fixed in a threaded connection, the inner lower cone (24) and the central pipe (1) are provided with a third O-shaped sealing ring (43) and a third O-shaped sealing ring blocking ring (44), the outer circle of the lower part of the central pipe (1) is provided with a sawtooth thread, the sawtooth thread is moved to the lower locking ring (25) and the inner teeth of the lower locking ring (25) in reverse engagement when the packer is recovered, after engagement, the upper cone (22) is driven to move upwards to release the two-way integrated barrel-shaped elastic slip (23) to release the locking force and drive the two-way integrated barrel-shaped elastic slip (23) to be recovered to release the anchoring.

9. The large-passage, high-temperature, high-pressure, high-load suspension completion packer of claim 8, wherein: The releasing claw releasing system assembly comprises the lower joint connecting sleeve (27) and a releasing claw (46) sleeved on the outer wall of the central pipe (1), the upper end of the releasing claw (46) is threadedly connected with the central pipe (1), the lower end is threadedly connected with the lower joint connecting sleeve (27), the lower end of the lower joint connecting sleeve (27) is threadedly connected with a lower joint (47) sleeved on the outer wall of the central pipe (1) and is fixed through a fourth set screw (48), a fourth O-shaped sealing ring (45) is arranged between the lower joint (47) and the lower joint connecting sleeve (27), a releasing claw support body (49) is arranged in the releasing claw (46), a releasing shear pin (50) is arranged in the ring groove of the releasing claw support body (49) through the threaded hole of the releasing claw (46), two fifth O-shaped sealing rings (51) are arranged on the outer circle of the releasing claw support body (49) and form a seal with the lower joint (47), when the releasing and launching tool (52) needs to release and recycle the packer, the releasing and launching tool (52) is arranged in the tubing from the wellhead, the upper part of the releasing claw support body (49) and forms a surface seal with the releasing claw support body (49).

Images