CN117967208A - Multifunctional integrated pipe column and method for well completion and yield increase of ultra-deep and ultra-thick reservoir - Google Patents

Abstract

The invention discloses a multifunctional integrated tubular column for completion and production increase of ultra-deep and ultra-thick reservoirs and a method thereof, wherein each level of packer of the tubular column only needs to be set once, so that the problem of sealing failure of a rubber cylinder caused by repeated setting of the packer is solved; the two purposes of high-temperature high-pressure deep well layered fracturing and well completion production can be realized by one pipe column, the construction period is short, and the production efficiency is high; according to the reservoir condition of the oil and gas well, a telescopic pipe, a hydraulic control bidirectional soluble packer, a hydraulic anchor and a fracturing sliding sleeve with corresponding stages can be arranged in the reservoir, so that multilayer partial pressure is realized. After the hydraulic anchor is decompressed, the hydraulic anchor is retracted under the action of an internal spring, the hydraulic anchor is easy to release and clamp, a soluble block in the hydraulic control bidirectional soluble packer can be automatically dissolved, a sealing rubber barrel rebounds, and the packer is easy to release; the fracturing construction is carried out step by step on the positions of all reservoir sections, so that the sealing performance of each stage of packer can be effectively checked, and the influence of the channeling on the fracturing construction is prevented.

Description

Multifunctional integrated pipe column and method for well completion and yield increase of ultra-deep and ultra-thick reservoir

Technical Field

The invention relates to the technical field of oil and gas exploitation, in particular to a multifunctional integrated pipe column and method for well completion and yield increase of ultra-deep and huge reservoir.

Background

The exploration and development of the conventional oil and gas reservoirs in China gradually turns to deep complex oil and gas reservoirs, and the reservoirs have the characteristics of deep burial, strong heterogeneity, high formation fracture pressure, high temperature and the like, have high yield increasing and transformation difficulty, and provide higher requirements for yield increasing and transformation tools.

Conventional layered fracturing tool strings have the following problems in high pressure reservoir reformation:

1. in a high-temperature high-pressure well, the packer is repeatedly set, so that the performance of a sealing rubber cylinder is reduced, and the sealing of the packer is invalid;

2. the number of partial pressure layers is small, and the number of pipe column running passes is large, so that the construction period is longer, and the production efficiency is lower;

3. After the fracturing construction is finished, the tool is easy to sand-embed and sand-clamp, so that the pipe column is difficult to lift up and the difficulty of unlocking is high;

These shortcomings make the conventional layered fracturing tool pipe column difficult to meet the requirements of layered production increase reconstruction of deep complex oil and gas reservoirs, and become the current problem to be solved urgently

Disclosure of Invention

The invention aims to solve the defects existing in the prior art, and provides a multifunctional integrated pipe column and method for well completion and production increase of an ultra-deep and ultra-thick reservoir, wherein a multi-stage hydraulic control bidirectional soluble packer, a telescopic pipe, a fracturing sliding sleeve and a hydraulic anchor are mutually connected in short circuit, each stage of packer is only required to complete one-time setting, one pipe column can realize two purposes of high-temperature and high-pressure deep well layered fracturing and well completion production, the construction period is short, the production efficiency is high, and the problem that the sealing failure of a packing element is caused by repeated setting of the packer is solved.

The technical scheme of the invention is as follows: a multifunctional integrated tubular column for well completion and production increase of ultra-deep and ultra-thick reservoirs comprises an oil pipe, an underground safety valve, a permanent packer, a multi-section telescopic pipe, a hydraulic anchor, a fracturing sliding sleeve, a hydraulic control bidirectional soluble packer, a setting ball seat, a sieve tube and a round head guide shoe which are sequentially connected from top to bottom; the underground safety valve and the permanent packer are close to the wellhead and are fixedly arranged on the oil pipe.

The telescopic pipe mainly comprises an upper joint, an outer barrel, a pressing cap, a sealing part, a mandrel, a key sleeve, a guide key, a shear pin and a lower joint, wherein the sealing part and a displacement groove are arranged on the mandrel, the sealing part is formed by stacking V-shaped sealing rings made of fluorine rubber materials and metal sealing rings, the guide key is matched with the displacement groove and is arranged on the key sleeve, the circumferential rotation and the axial expansion amount of the mandrel are limited, the shear pin is arranged on the key sleeve and the mandrel, the shear pin is sheared under the hydraulic action, and the telescopic pipe axially moves, so that each stage of the fracturing sliding sleeve reaches a designated operation position.

The hydraulic anchor mainly comprises a shell, a slip base, a fixed pressing plate, tungsten steel anchors and a reset spring, wherein three groups of slips are uniformly distributed on the shell in the circumferential direction, the reset spring is arranged in the slip base, the fixed pressing plate is arranged above the slip base and is connected with the shell through bolts, the slip base is fixed, four tungsten steel anchors are inlaid on the slip base, under the hydraulic action, the slip base radially moves to the anchor anchoring sleeve, at the moment, the reset spring is in a compressed state, after pressure relief, the slip base retracts under the action of the spring, and the hydraulic anchor is released.

The fracturing sliding sleeve mainly comprises an upper joint, a sliding sleeve, an outer barrel, a guide pin, a fracturing ball, a shearing pin, a ball seat and a lower joint, wherein a guide groove is formed in the surface of the inner sliding sleeve, the guide pin is connected with the outer barrel and matched with the guide groove, circumferential rotation and axial displacement of the sliding sleeve are limited, before operation, the sliding sleeve is connected with the outer barrel through the shearing pin, after ball throwing, the shearing pin is broken under the action of pressure, and the sliding sleeve descends to a surface through hole to correspond to the outer barrel through hole, so that a sand blasting channel is opened.

The hydraulic control bidirectional soluble packer mainly comprises an upper joint, a shearing outer cylinder, a mandrel, a piston, a shearing joint, a dissolvable block, a spacing ring, a spacer sleeve, a sealing rubber cylinder, an inner locking slip, a shearing pin and a lower joint, wherein all parts of the packer are symmetrically arranged up and down, the upper joint is connected with the shearing outer cylinder through bolts, four through holes on the surface of the upper joint correspond to a hydraulic runner of the shearing outer cylinder, the shearing joint is connected with the shearing outer cylinder through the shearing pin, the piston is connected with the shearing joint, the inner locking slip is positioned between the piston and the shearing joint, self-locking threads are arranged on the contact surface of the inner locking slip and the mandrel, the unidirectional displacement of the inner locking slip is limited, the sealing part is formed by four rubber cylinders, two dissolvable blocks, two spacing rings and one spacer sleeve in an up-down symmetrical manner, liquid enters the runner of the shearing outer cylinder through the through holes of the upper joint and the lower joint under the hydraulic action of a central pipeline, so that the shearing pin is broken, the upper piston and the lower piston axially moves to drive the shearing joint and the dissolvable block to extrude the middle rubber cylinder, the rubber cylinder to expand by extrusion, and the inner locking slip is tightly locked at the moment, the inner locking slip is prevented from rebounding, and good sealing effect can be realized after the packer is sealed. After the fracturing operation is finished, as the length of the dissolvable block is larger than the compression stroke of the rubber cylinder, the rubber cylinder rebounds after the dissolvable block is automatically dissolved, so that deblocking is realized.

In addition, the invention also aims to protect a use method of the multifunctional integrated tubular column for well completion and production increase of the ultra-deep and ultra-thick reservoir, which comprises the following sequential steps:

1) According to the reservoir condition of an oil and gas well, preparing a corresponding number of telescopic pipes, a hydraulic control bidirectional soluble packer, a hydraulic anchor and a fracturing sliding sleeve, and assembling the telescopic pipes, the hydraulic anchor, the fracturing sliding sleeve, a downhole safety valve, a permanent packer, a setting ball seat, a screen pipe and a round head guide shoe on an oil pipe to form an integrated pipe column;

2) Running the assembled pipe column into a shaft of an oil-gas well;

3) Putting a bottom fracturing ball;

4) Driving hydraulic pressure into the oil pipe, breaking shear pins in the telescopic pipes of each stage, axially displacing the mandrel, and driving the hydraulic anchor, the fracturing sliding sleeve and the hydraulic control bidirectional soluble packer to descend to the positions of all reservoir sections in the oil-gas well;

5) The inside of the oil pipe is in a pressurizing state, the slip bases on the hydraulic anchors at all levels are radially displaced, the anchors are anchored into the sleeve, anchoring is completed, the upper piston and the lower piston of the packer simultaneously squeeze the rubber cylinder, and the packer at all levels is completed in setting;

6) A first-stage fracturing ball is thrown into the pipe column and matched with a fracturing ball seat in a first-stage fracturing sliding sleeve to finish sealing, then the fracturing is continued, a shear pin in the first-stage fracturing sliding sleeve is broken, the sliding sleeve moves downwards, a sand blasting channel is opened, and fracturing fluid enters a first-stage interval from a sand blasting port to perform fracturing construction;

7) After the construction of the first-stage interval is finished, a second-stage fracturing ball is put into the first-stage fracturing ball, the diameter of the second-stage fracturing ball is larger than that of the first-stage fracturing ball, the ball seat in the second-stage fracturing sliding sleeve is tightly adhered to realize sealing, at the moment, the oil pipe of the first-stage interval is in a pressure release state, the hydraulic anchor is released, after the dissolvable block in the first-stage packer is automatically dissolved, the rubber barrel rebounds, the packer is automatically unsealed, the oil pipe of the second-stage interval is continuously pressed, and the fracturing process of the first-stage interval is repeated;

8) Repeating the step 6) for more layers of sections to perform fracturing construction operation, so that the step-by-step deblocking of each hydraulic anchor and the hydraulic control bidirectional soluble packer is realized while the step-by-step fracturing construction of the tubular column is completed; for example, after the third stage fracturing balls are put into, the first stage hydraulic anchors and the second stage hydraulic anchors are released, and the third stage layer section starts fracturing construction.

Compared with the prior art, the invention has the beneficial effects that: the packer of each level of the tubular column only needs to be set once, so that the problem of sealing failure of the rubber cylinder caused by repeated setting of the packer is solved; the two purposes of high-temperature high-pressure deep well layered fracturing and well completion production can be realized by one pipe column, the construction period is short, and the production efficiency is high; according to the reservoir condition of the oil and gas well, a telescopic pipe, a hydraulic control bidirectional soluble packer, a hydraulic anchor and a fracturing sliding sleeve with corresponding stages can be put in to realize multi-layer partial pressure; after the hydraulic anchor is decompressed, the hydraulic anchor is retracted under the action of an internal spring, the hydraulic anchor is easy to release and clamp, a soluble block in the hydraulic control bidirectional soluble packer can be automatically dissolved, a sealing rubber barrel rebounds, and the packer is easy to release; the fracturing construction is carried out step by step on the positions of all reservoir sections, so that the sealing performance of each stage of packer can be effectively checked, and the influence of the channeling on the fracturing construction is prevented.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of a connection structure of a tubular string according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the overall structure of the hydraulically controlled bi-directional dissolvable packer of the present invention

Figure 3 is a schematic view of the overall structure of the telescopic tube of the present invention.

Fig. 4 is a schematic view of the overall structure of the hydraulic anchor of the present invention.

FIG. 5 is a cross-sectional view of the overall structure of the fracturing sleeve of the present invention

In the figure, the device comprises an A-permanent packer, a B-telescopic pipe, a C-fracturing sliding sleeve, a D-hydraulic anchor, an E-hydraulic control bidirectional soluble packer, an F-setting ball seat, a G-sieve tube, an H-round head shoe, an I-downhole safety valve, an E1-upper joint, an E2-shearing outer cylinder, an E3-mandrel, an E4-piston, an E5-shearing joint, an E6-inner locking slip, an E7-soluble block, an E8-spacer ring, an E9-spacer sleeve, an E10-sealing rubber cylinder, an E11-lower joint, a D1-shell, a D2-fixed pressing plate, a D3-slip base, a D4-reset spring, a D5-tungsten steel anchor, a B1-upper joint, a B2-outer cylinder, a B3-pressing cap, a B4-mandrel, a B5-key sleeve, a B6-guide key, a B7-lower joint, a B8-sealing component, a C1-upper joint, a C2-sliding sleeve, a C3-outer cylinder, a C4-guide pin, a C5-ball seat, a C6-pressing ball, and a C7-lower joint.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.

The underground safety valve, the permanent packer, the hydraulic anchor, the fracturing sliding sleeve, the telescopic pipe, the setting ball seat, the sieve tube, the round head guide shoe and the oil pipe are all common accessories in the well completion process and are commercially available.

The specific embodiment of the invention comprises the following steps:

Examples:

As shown in fig. 1, 2,3 and 4, the multifunctional integrated pipe column for completion and production increase of ultra-deep and ultra-thick reservoir of the embodiment comprises an oil pipe, an underground safety valve I, a permanent packer a, a multi-section telescopic pipe B, a hydraulic anchor D, a fracturing sliding sleeve C, a hydraulic control bidirectional soluble packer E, a setting ball seat F, a sieve tube G and a round head guide shoe H which are sequentially connected from top to bottom; the underground safety valve and the permanent packer A are close to the wellhead and are fixedly arranged on an oil pipe.

The telescopic pipe B is characterized in that a sealing component B and a displacement groove are arranged on a mandrel B4, the sealing component is formed by stacking V-shaped sealing rings made of fluorine rubber and metal sealing rings, a guide key B6 is matched with the displacement groove and is arranged on a key sleeve B5, a shear pin is arranged on the key sleeve B5 and the mandrel B4, under the action of hydraulic pressure, the shear pin is sheared off, and the telescopic pipe B moves axially, so that each stage of fracturing sliding sleeve reaches a designated operation position.

The hydraulic anchor D, circumference evenly distributed three group slips on casing D1, reset spring D4 establishes in slips base member D3, fixed clamp plate D2 establishes in slips base D4 top to adopt bolted connection in casing D1, fixed slips base D3, slips base D3 is last to inlay has four tungsten steel anchor nails D5, under hydraulic pressure, slips base D3 radial displacement is to anchor nail anchor go into on the sleeve pipe, reset spring D4 is compressed state this moment, after the pressure release, slips base D3 is retracted under the spring action, hydraulic anchor D unfreezes.

The fracturing sliding sleeve C, inside sliding sleeve C2 surface be equipped with the guide way, guide pin C4 is connected with urceolus C3 to with the guide way cooperation, restriction sliding sleeve C2's circumferential direction and axial displacement, before the operation, sliding sleeve C2 is connected through cutting the round pin with urceolus C3, after throwing the ball, under the pressure effect, cuts the round pin fracture, sliding sleeve C2 descends to the surface through-hole and corresponds with urceolus C3 through-hole, thereby opens the sandblast passageway.

The hydraulic control bidirectional soluble packer is characterized in that all parts are symmetrically arranged up and down, an upper connector E1 is connected with a shearing outer cylinder E2 through bolts, four through holes on the surface of the upper connector correspond to the hydraulic flow passage of the shearing outer cylinder E2, the shearing connector E5 is connected with the shearing outer cylinder E2 through a shearing pin, a piston E4 is connected with the shearing connector E5, an inner locking slip E6 is positioned between the piston E4 and the shearing connector E5, a self-locking thread is arranged on the contact surface of the inner locking slip E6 and a mandrel E3, unidirectional displacement of the inner locking slip E6 is limited, a sealing part is formed by four rubber cylinders E10, two dissolvable blocks E7, two isolating rings E8 and a isolating sleeve E9 in an up-down symmetrical mode, liquid enters the flow passage of the shearing outer cylinder E2 through the upper connector through holes and the lower connector through holes and acts on the surface of the piston E4 under the hydraulic action of a central pipeline, so that the shearing pin is broken, the upper piston and the lower piston axially move to drive the shearing connector E5 and the dissolvable blocks E7 to extrude the middle rubber cylinder, the rubber cylinder E10 to be extruded and expand, the inner locking slip E6 is tightly attached to a sleeve, the inner locking slip E6 is prevented from self-locking slip E10, and a good sealing effect can be achieved. After the fracturing operation is finished, as the length of the dissolvable block E7 is larger than the compression stroke of the rubber cylinder E10, the rubber cylinder E10 rebounds after the dissolvable block E7 is automatically dissolved, so that the deblocking is realized.

The application method of the multifunctional integrated pipe column of the embodiment is as follows:

1) According to the reservoir condition of an oil and gas well, preparing a corresponding number of telescopic pipes B, a hydraulic control bidirectional soluble packer E, a hydraulic anchor D and a fracturing sliding sleeve C, and assembling the telescopic pipes B, the hydraulic anchor D, the fracturing sliding sleeve C, the underground safety valve I, a permanent packer A, a setting ball seat F, a screen pipe G and a round head guide shoe H on the oil pipe to form an integrated pipe column;

2) Running the assembled pipe column into a shaft of an oil-gas well;

3) Putting a bottom fracturing ball C5;

4) Driving hydraulic pressure into the oil pipe, breaking shear pins in the telescopic pipes B at each level, axially displacing the mandrel B4, and driving the hydraulic anchor D, the fracturing sliding sleeve C and the hydraulic control bidirectional soluble packer E to descend to the positions of all reservoir sections in the oil-gas well;

5) The inside of the oil pipe is in a pressurizing state, the slip bases D3 on the hydraulic anchors D at all levels are radially displaced, the anchors are anchored into the casing, anchoring is completed, the upper piston E4 and the lower piston E4 of the packer E simultaneously squeeze the rubber cylinder E10, and the packer E at all levels is completed in setting;

6) A first-stage fracturing ball C5 is thrown into the pipe column and matched with a setting ball seat C6 in the first-stage fracturing sliding sleeve C, sealing is completed, then pressing is continued, a shear pin in the first-stage fracturing sliding sleeve C is broken, the sliding sleeve C2 descends, a sand blasting channel is opened, and fracturing fluid enters a first-stage interval from a sand blasting port to carry out fracturing construction;

7) After the construction of the first-stage interval is finished, a second-stage fracturing ball is put into the first-stage fracturing ball, the diameter of the second-stage fracturing ball is larger than that of the first-stage fracturing ball, the ball seat in the second-stage fracturing sliding sleeve is tightly adhered to realize sealing, at the moment, the oil pipe of the first-stage interval is in a pressure release state, the hydraulic anchor is released, after the dissolvable block in the first-stage packer is automatically dissolved, the rubber barrel rebounds, the packer is automatically unsealed, the oil pipe of the second-stage interval is continuously pressed, and the fracturing process of the first-stage interval is repeated;

8) Repeating the step 6) for more layers, gradually throwing the fracturing balls with the diameters larger than those of the previous stages into the fracturing balls for carrying out the fracturing construction operation of each stage, and after the pipe column step-by-step fracturing construction is completed, gradually unsealing the hydraulic anchors and the hydraulic control bidirectional soluble packer.

The use of the pipe string in the above embodiments is only described for several possible fracturing construction procedures of the pipe string of the present application, and is not intended to limit the invention, and any equivalent replacement, improvement, etc. of the fittings in the fracturing construction procedure, which meets the actual needs, are all within the scope of the present invention.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (6)

1. An ultra-deep and ultra-thick reservoir well completion and production increase multifunctional integrated tubular column comprises an oil pipe, an underground safety valve (I), a permanent packer (A), a plurality of sections of telescopic pipes (B), a hydraulic anchor (D), a fracturing sliding sleeve (C), a hydraulic control bidirectional soluble packer (E), a setting ball seat (F), a screen pipe (G) and a round head guide shoe (H) which are sequentially connected from top to bottom; the underground safety valve (I) and the permanent packer (A) are close to the wellhead and are fixedly arranged on the oil pipe.

2. The multifunctional integrated tubular column for completion and production increase of ultra-deep and huge thick reservoirs according to claim 1, wherein the telescopic tube (B) mainly comprises an upper joint (B4), an outer tube (B2), a press cap (B3), a sealing component (B8), a mandrel (B4), a key sleeve (B5), a guide key (B6), a shear pin and a lower joint (B7), the sealing component (B8) and a displacement groove are arranged on the mandrel (B4), the sealing component (B8) is formed by stacking V-shaped sealing rings made of fluorine rubber and metal sealing rings, the guide key (B6) is matched with the displacement groove and is installed on the key sleeve (B5), the circumferential rotation and axial expansion of the mandrel (B4) are limited, the shear pin is installed on the key sleeve (B5) and the mandrel (B4), the shear pin is sheared under the hydraulic action, and the telescopic tube (B) moves axially, so that the fracturing sliding sleeve (C) reaches a designated operation position.

3. The multifunctional integrated pipe column for completion and production increase of ultra-deep and huge thick reservoir according to claim 1, wherein the hydraulic anchor (D) mainly comprises a shell (D1), a slip base (D3), a fixed pressing plate (D2), tungsten steel anchors (D5) and a reset spring (D4), three groups of slips are uniformly distributed on the periphery of the shell (D1), the reset spring (D4) is arranged in the slip base, the fixed pressing plate (D2) is arranged above the slip base (D3) and is connected with the shell (D1) through bolts, the slip base (D3) is fixed, four tungsten steel anchors (D5) are inlaid on the slip base (D3), under the hydraulic action, the slip base (D3) radially moves to the anchor anchoring sleeve, at the moment, the reset spring (D4) is in a compressed state, after pressure relief, the slip base (D3) retracts under the action of the spring, and the hydraulic anchor (D) is released.

4. The multifunctional integrated pipe column for completion and production increase of ultra-deep and huge reservoir according to claim 1, wherein the fracturing sliding sleeve (C) mainly comprises an upper joint (C1), a sliding sleeve (C2), an outer barrel (C3), a guide pin (C4), a fracturing ball (C5), a shear pin, a ball seat (C6) and a lower joint (C7), a guide groove is formed in the surface of the inner sliding sleeve (C2), the guide pin (C4) is connected with the outer barrel (C3) and matched with the guide groove, circumferential rotation and axial displacement of the sliding sleeve (C2) are limited, the sliding sleeve (C2) is connected with the outer barrel through the shear pin before operation, after ball throwing, the shear pin is broken under the action of pressure, and the sliding sleeve (C2) descends to a surface through hole corresponding to the through hole of the outer barrel (C3), so that a sand blasting channel is opened.

5. The multifunctional integrated pipe column for completion and production increase of ultra-deep and huge thick reservoir according to claim 1, wherein the hydraulic control bidirectional soluble packer (E) mainly comprises an upper joint (E1), a shearing outer barrel (E2), a mandrel (E3), a piston (E4), a shearing joint (E5), a soluble block (E7), a spacing ring (E8), an isolation sleeve (E9), a sealing rubber cylinder (E10), an inner locking slip (6), a shearing pin and a lower joint (E11), all parts of the packer (E) are arranged symmetrically up and down, the upper joint (E1) is connected with the shearing outer barrel (E2) by adopting bolts, four through holes on the surface of the upper joint (E1) correspond to a hydraulic runner of the shearing outer barrel (E2), the shearing joint (E5) is connected with the shearing outer barrel (E2) by adopting a shearing pin, the piston (E4) is connected with the shearing joint (E5), the inner locking slip (6) is positioned between the piston and the shearing joint (E5), the inner locking slip (6) and the mandrel contact surface are provided with self-locking threads, the inner locking slip (6) and the limiting the inner locking slip (6) can move in a way through the upper sealing block (E7), the two sealing blocks (E8) and the lower sealing sleeve (E2) and the two through the upper joint (E2) and the lower joint (E2), the two hydraulic runners (E2) are symmetrically applied to the upper joint (E2) and the lower joint (E2) and the hydraulic runner (8), the shear pin is broken, the upper piston (E4) and the lower piston (E4) axially move to drive the shear joint (E5) and the dissolvable block (E7) to extrude the middle rubber cylinder (E10), the rubber cylinder (E10) is extruded to expand and is tightly attached to the sleeve, at the moment, the inner locking slips (6) are self-locked, the rubber cylinder (E10) is prevented from rebounding, and the packer (E) is used for completing setting and can realize a good sealing effect. After the fracturing operation is finished, as the length of the dissolvable block (E7) is larger than the compression stroke of the rubber cylinder (E10), the rubber cylinder (E10) rebounds after the dissolvable block (E7) is automatically dissolved, so that the deblocking is realized.

6. A method for using an ultra-deep and ultra-thick reservoir completion and production-increasing multifunctional integrated tubular column, applying the high-temperature and high-pressure completion and production-increasing multifunctional integrated tubular column according to any one of claims 1-5, characterized in that the method comprises the following steps:

1) According to the reservoir condition of an oil and gas well, preparing a corresponding number of telescopic pipes (B), a hydraulic control bidirectional soluble packer (E), a hydraulic anchor (D) and a fracturing sliding sleeve (C), and assembling the telescopic pipes, the underground safety valve (I), a permanent packer (A), a setting ball seat (F), a sieve tube (G) and a round head guide shoe (H) on the oil pipe to form an integrated tubular column;

2) Running the assembled pipe column into a shaft of an oil-gas well;

3) Throwing a bottom fracturing ball (C5);

4) Driving hydraulic pressure into the oil pipe, breaking shear pins in the telescopic pipes (B) at each level, axially displacing the mandrel (B4), and driving the hydraulic anchor (D), the fracturing sliding sleeve (C) and the hydraulic control bidirectional soluble packer (E) to descend to the positions of all reservoir sections in the oil-gas well;

5) The inside of the oil pipe is in a pressurizing state, a slip base (D3) on each level of hydraulic anchors (D) radially displaces, an anchor nail is anchored into a sleeve, anchoring is completed, an upper piston (E4) and a lower piston (E4) of a packer (E) simultaneously squeeze a rubber cylinder (E10), and each level of packer (E) completes setting;

6) A first-stage fracturing ball (C5) is thrown into the pipe column and matched with a setting ball seat (C6) in the first-stage fracturing sliding sleeve (C), sealing is completed, then the pipe column is continuously pressed, a shear pin in the first-stage fracturing sliding sleeve (C5) is broken, the sliding sleeve (C2) descends, a sand blasting channel is opened, and fracturing fluid enters a first-stage interval from a sand blasting port to carry out fracturing construction;

7) After the construction of the first-stage interval is finished, a second-stage fracturing ball is put into, the diameter of the second-stage fracturing ball is larger than that of the first-stage fracturing ball, the second-stage fracturing ball is tightly adhered to a ball seat in a second-stage fracturing sliding sleeve to realize sealing, at the moment, an oil pipe of the first-stage interval is in a pressure release state, a hydraulic anchor is released, after a dissolvable block in a first-stage packer is automatically dissolved, a rubber barrel rebounds, the packer is automatically unsealed, the oil pipe of the second-stage interval is continuously pressed, and the fracturing process of the first-stage interval is repeated;

8) Repeating the step 6) for more layers of sections, performing fracturing construction operation on the sections, and after the pipe column step-by-step fracturing construction is completed, gradually unsealing each hydraulic anchor and each hydraulic control bidirectional soluble packer.