Rotary jarring type expansion shaper

Abstract

The invention discloses a rotary jarring type expansion shaper which comprises an expansion shaping assembly, a hydraulic impact assembly and a connecting assembly. The expansion shaping assembly comprises an impact head, a disc spring, a reset rubber strip, an expansion piece, a sliding block and a limiting sliding groove. The hydraulic impact assembly comprises a flow guide pipe, a jarring block, a flow guide cavity, a first flow guide pipe, a second flow guide pipe, a first flow guide groove and a second flow guide groove. The connecting assembly comprises a connector, a buffer rubber ring, a shell, a guide head, a pressure relief pipe, a third flow guide groove and a fourth flow guide groove. The hydraulic impact assembly and the expansion shaping assembly are connected together through the connecting assembly, and the connecting assembly is connected with a ground control system. A power source is provided by the hydraulic cylinder, shaping is conducted in a jarring expansion mode, traditional axial force shaping is converted into repeated jarring type shaping, fatigue damage is generated at the sleeve deformation position, and the shaping efficiency is improved; the expansion reshaping part adopts a rotary expansion mode, the expansion piece completely covers the casing deformation position during working, the phenomenon that the expansion piece is broken due to the fact that the azimuth angle of the casing deformation position is unknown is prevented, and meanwhile, the expansion piece has a certain torque and a certain jam releasing effect to prevent drill jamming during recovery.

Description

Technical Field

[0001] The invention discloses a rotary shocking expansion shaper, which belongs to the field of deformed casing repair. Background Art

[0002] In the process of oil and gas field development, due to factors such as engineering or geological changes, the downhole casing will be deformed and damaged, resulting in a decrease in production efficiency or even suspension of production, which seriously affects the implementation of subsequent measures for the well. Especially for the Sichuan and Chongqing regions, according to incomplete statistics, the casing deformation rate of shale oil and gas wells is ≥35%, with an annual growth rate of more than 24.5%. At the same time, the casing steel grade has been continuously improved from the original N80 and P110 to the current TP125 and even P140 steel grade casing. The casing deformation and shaping has become more and more difficult. Therefore, casing deformation and shaping has become a key link in the recovery of damaged wells.

[0003] At present, the methods for repairing sleeve changes at home and abroad are mainly mechanical shaping, explosive shaping, sleeve milling, etc., all of which have certain problems. For example, the explosive shaping has a publication number (CN2437844Y) with low reliability and poor controllability, and is prone to secondary damage to the sleeve; the ball shaping has a publication number (CN112377135A) in which the steel ball is prone to fall off during the shaping process, which makes the processing difficult and the construction period long. It is inefficient to replace tools of different specifications to deal with different sleeve changes; the expansion tube shaping has a publication number (CN208870560U) in which after the sleeve is squeezed and expanded, the elastic recovery force of the sleeve material itself will reduce the size of the expander, causing drill jamming.

[0004] In view of the above problems, a rotary shock expansion shaper is proposed to optimize the casing shaping technology and improve the shaping efficiency. Summary of the invention

[0005] In view of the above problems, the present invention proposes a rotary jarring expander to improve the repair efficiency of deformed casing. The present invention innovatively uses a repair method combining a hydraulic impact assembly with a rotary expansion to achieve the purpose of jarring the repair of the deformed casing, which can realize continuous pipeline repair operations and reduce operating costs.

[0006] The purpose of the present invention is to provide a rotary shock-type expansion and shaping tool, which converts traditional axial force shaping into multiple shock-type shaping, so that the sleeve change position produces fatigue damage and the shaping efficiency is improved; and when the rotary expansion component is working, the expansion plate completely covers the sleeve change position to prevent the expansion plate from breaking due to the unknown azimuth angle of the sleeve change position. At the same time, there is a certain torque when the expansion plate is recovered and expanded, which can prevent the drill from getting stuck and ensure the shaping effect.

[0007] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0008] A rotary shock type expansion and shaping device, characterized in that it comprises an expansion and shaping component, a hydraulic impact component, and a connecting component:

[0009] The expansion assembly includes: an impact head, a disc spring, a reset rubber strip, an expansion sheet, a slider, and a slide groove; the impact head is placed in the shell and passes through the limiting hole at the bottom of the shell, and a disc spring is installed between the shell and the impact head; every two expansion sheets are slidably connected through the slider and the slide groove, and the 12 expansion sheets are connected into a ring-shaped whole in the same way, each expansion sheet has two holes for the rubber strip to pass through, and the reset rubber strip is connected in series through the holes, ensuring that it can automatically shrink after each repair is completed, and the expansion sheet is integrally sleeved on the pressure relief pipe, with one side of the cone contacting with the cone of the impact head, and the other side of the cone contacting with the cone of the pressure relief pipe to play a boosting role during expansion;

[0010] The hydraulic impact assembly comprises: a guide block, a shock block, and a plunger. The shock block is provided with a No. 1 chamber through which the plunger can pass, and two guide grooves are provided on the side, namely, a No. 1 guide groove and a No. 2 guide groove, which are connected with the No. 2 guide pipe through the No. 1 guide pipe, and are used for pressure relief when the shock block slides to different positions. The bottom is provided with a No. 2 chamber through which the pressure relief pipe can pass, and is used for pressure holding and pressure relief; the guide block is fixedly connected to the housing through a thread, the top of the plunger is connected to the bottom of the guide block through a thread, and a flow channel is provided inside the plunger;

[0011] The connecting assembly includes: a joint, a buffer rubber ring, a shell, a guide head, a limiting hole, a pressure relief pipe, a No. 3 guide groove, and a No. 4 guide groove; a limiting hole is provided at the bottom of the shell for allowing the impact head to pass through, which plays an axial guiding role, and a No. 3 guide groove and a No. 4 guide groove are provided inside the shell to match the guide groove in the hydraulic impact assembly. The joint is fixedly connected to the shell by threads, the pressure relief pipe is arranged in a threaded hole reserved in the shell, and is fixedly connected by threads, a buffer rubber ring is provided on the top of the pressure relief pipe, and the bottom is connected to the guide head by threads.

[0012] As a further technical solution of the present invention, a flow channel with a diameter of 10 mm is provided inside the plunger so as to have a sufficient flow rate, thereby ensuring high-frequency vibration of the hydraulic impact assembly.

[0013] As a further technical solution of the present invention, the number of expansion pieces is 12, which are evenly connected to form a ring. Under the joint action of the cone surface of the impact head and the cone surface of the pressure relief pipe, the expansion piece can only rely on the slide grooves and sliders set on the front and back sides to slide in a limited manner. Torque will be generated during this sliding. When working, the expansion piece must just coincide with the inner diameter of the casing to be repaired or be slightly larger than the inner diameter of the casing to achieve a good repair effect.

[0014] As a further technical solution of the present invention, an arc-shaped protrusion is provided on the shaping surface of the expansion sheet, and the pressure calculation formula is The protrusion is used to reduce the contact area with the sleeve change position, thereby increasing the pressure and improving the repair effect.

[0015] As a further technical solution of the present invention, two grooves of certain length and matching with each other are opened on the side of the shock block and the inner side of the shell, and when the shock block moves up and down, the flow channel is connected and closed.

[0016] As a further technical solution of the present invention, a No. 1 chamber is opened on the top of the shock block, and a No. 2 chamber is opened on the bottom. When the shock block vibrates up and down, the pressure relief pipe and the plunger will cooperate with the two chambers to achieve pressure holding and pressure relief.

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

[0018] 1. The present invention is designed with a hydraulic vibration component, which utilizes the simple pressure holding and pressure release behavior to make the expansion piece expand outward at high frequency, converting the traditional direct axial hard push into multiple radial vibrations, causing fatigue damage to the sleeve change position, reducing the difficulty of shaping and improving the shaping efficiency.

[0019] 2. The present invention is designed with a new expansion component, which adopts a multi-piece rotating expansion method. It occupies a small volume when contracted and has a large range when expanded. It can be applied to sleeves of different sizes, and the shaping range is also larger than that of traditional expansion shapers.

[0020] 3. The rotary expansion assembly of the present invention generates a certain torque during expansion and contraction. During expansion, it generates both radial force and tangential force along the contact surface. The shaping force is greater, the shaping process is faster, and the shaping cycle is reduced.

[0021] 4. When the expansion piece contracts, there is a torque in the reverse direction, which can prevent the drill from getting stuck and has a certain unblocking effect, making the plastic surgery process more reliable and safe.

[0022] 5. During the expansion process, the expansion piece always keeps completely covering the circumference of the sleeve transformer to prevent the expansion piece from breaking due to the unknown azimuth of the sleeve transformer.

[0023] 6. In terms of technology, the expansion piece of the present invention is provided with an arc-shaped protrusion. According to the principle that the smaller the contact area, the greater the pressure, this method is used to reduce the contact area with the sleeve change position, thereby increasing the pressure and improving the repair effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings mentioned herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of the present invention, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a schematic diagram of a single expansion piece of the present invention.

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the impact head of the present invention.

[0028] Figure 4 The present invention is attached Figure 1 Enlarged schematic diagram at point A in the middle.

[0029] Figure 5 The present invention is attached Figure 1 Enlarged schematic diagram of point B in the middle.

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the expansion piece connection of the present invention.

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the bottom of the shell of the present invention.

[0032] Legend

[0033] 1-connecting assembly, 2-hydraulic impact assembly, 3-expansion assembly, 101-joint, 102-buffer rubber gasket, 103-housing, 104-guide head, 105-limiting hole, 106-pressure relief pipe, 107-No. 3 guide groove, 108-No. 4 guide groove, 201-guide block, 202-shock block, 203-plunger, 204-No. 1 guide pipe, 205-No. 2 guide pipe, 206-No. 1 guide groove, 207-No. 2 guide groove, 208-No. 1 chamber, 209-No. 2 chamber, 301-impact head, 302-disc spring, 303-reset rubber strip, 304-expansion sheet, 305-slider, 306-slide groove DETAILED DESCRIPTION

[0034] The scheme in the embodiment of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0035] Example:

[0036] Reference Figure 1-6 The present invention provides an embodiment: a rotary shock-type expansion shaper, which can be connected in sequence to a hydraulic impact component 2, a connecting component 1, and an expansion component 3.

[0037] Reference Figure 1The top of the shell 103 is connected to the joint 101 through threads, the bottom of the joint 101 is in contact with the guide block 201, and the bottom of the guide block 201 is in contact with the protrusion of the shell 103 and has a certain limiting effect.

[0038] Reference Figure 4 The top of the plunger 203 is connected to the threaded hole reserved at the bottom of the guide block 201 through a thread. A sealing rubber ring is provided at the plug head at the lower end of the plunger 203, which cooperates with the No. 1 chamber 208 at the upper end of the shock block 202. A flow channel is opened inside the plunger 203.

[0039] Reference Figure 1 and Figure 4 The upper part of the shock block 202 is provided with a No. 1 chamber 208 for the piston 203 to pass through, and cooperates with the sealing rubber ring on the piston 203 to form a certain sealing effect. The side is provided with a No. 1 guide groove 206 which is connected with the No. 1 chamber 208 through the No. 1 guide pipe 204; the bottom of the shock block 202 is provided with a No. 2 chamber 209 for the pressure relief pipe 106 to pass through, and cooperates with the pressure relief pipe 106 through the rubber ring to form a certain sealing effect. The side is provided with a No. 2 guide groove 207 which is connected with the No. 2 chamber 209 through the No. 2 guide pipe 205.

[0040] Reference Figure 1 Figure 3 Figure 5 and Figure 7 The impact head 301 is placed in the shell 103. A buffer rubber gasket 102 is laid on the top of the impact head 301. The bottom is divided into four even petals, which pass through the limiting hole 105 at the bottom of the shell 103. The limiting hole 105 provides a certain axial guiding effect for it. A disc spring 301 is installed between the shell 103 and the impact head 301 to play a restoring role.

[0041] Reference Figure 2 The surface of the expansion piece 304 is provided with a cylindrical protrusion, which increases the pressure by reducing the contact area with the sleeve, thereby reducing the difficulty of the shaping process. A slider 305 and a slide groove 306 are provided on the front and rear sides thereof, and two holes are provided for the resetting rubber strip 303 to pass through.

[0042] Reference Figure 6 Every two expansion pieces 304 are slidably connected with the slide groove 306 through the slider 305, and the same method is used to connect 12 expansion pieces 304 into a ring-shaped whole. The reset rubber strip 303 connects the expansion pieces 304 in series through the hole, ensuring that they can automatically shrink after each repair. The expansion piece 304 is integrally sleeved on the pressure relief pipe 106, and its one side conical surface contacts the conical surface of the impact head 301, and the other side conical surface contacts the conical surface of the pressure relief pipe 106, which plays a boosting role during expansion.

[0043] Compared with the prior art, the above scheme adds a hydraulic impact component on the basis of the traditional expansion shaping, converting the axial hard push during shaping into radial vibration, so that the sleeve position is fatigued and damaged, reducing the difficulty of shaping; compared with the traditional expander, the expansion component adopts a multi-piece rotation expansion method, which occupies a small volume when contracted and can be extended to a larger size when expanded. The shaping range is larger than that of the traditional expander and can be applied to sleeves of different sizes; the expansion piece will generate a certain torque during the expansion and retraction process, and will generate radial force and tangential force during expansion. Compared with the traditional tool shaping force, it is greater and the dressing cycle is also lower. When contracting, it generates reverse torque, which can prevent the occurrence of drill jamming and has a certain ability to release the jam. When the expansion piece is expanded, the expansion piece is always kept completely covering the circumference of the sleeve change to prevent the expansion piece from breaking due to the unknown azimuth of the sleeve change. In terms of technology, an arc-shaped protrusion is arranged on the outside of the expansion piece. According to the principle that the smaller the contact area, the greater the pressure, the pressure at the contact part is increased, the fatigue damage of the sleeve change position is strengthened, and the shaping process is faster.

[0044] Working principle: When the entire tool pipe string is lowered to the sleeve change position, the hydraulic cylinder is connected to the shaper through the joint 101 and the liquid is input. When the liquid flows through the guide block 201, the aperture gradually decreases, thereby accelerating the flow rate. The high-pressure fluid flows out from the flow channel at the bottom of the plunger 203 at a high speed. The liquid will quickly fill the sealed space formed by the No. 1 chamber 208 and the No. 1 guide groove 206 and the cavity formed by the top of the shock block 202 and the guide block 201, thereby pushing the shock block 202 to move downward quickly and hit the impact head 301. When the plunger 203 plug is in contact with the No. 1 chamber 208, the No. 2 guide groove 207 will The pressure relief pipe 106 is connected to the No. 4 guide groove 108 on the shell 103, and the pressure relief pipe 106 is also inserted into the No. 2 chamber 209. The pressure accumulated on the top of the shock block 202 is discharged from this flow channel. At the same time, the liquid flowing out of the plunger 203 can only flow out through the channel formed by the No. 1 guide groove 206 of the No. 1 guide pipe 204 and the No. 3 guide groove 107, and is stored in the space between the shock block 202 and the impact head 301, and pushes the shock block 202 upward. When the pressure relief pipe 106 is detached from the No. 2 chamber 209, the liquid between the impact head 301 and the shock block 202 is discharged again, and this reciprocating cycle completes the shock part of the present invention. The conical surface of one side of the expansion piece 303 cooperates with the conical surface of the impact head 301, and the conical surface of the other side cooperates with the conical surface of the pressure relief pipe 106. When the vibration component shocks the impact head 301, the impact head 301 will impact the expansion piece 303, so that the expansion piece 303 moves along the reserved slide groove, thereby completing the axial expansion. When the impact head 301 retreats, the expansion piece is restored under the action of the reset rubber strip, completing an expansion shaping. The hydraulic impact component 2 and the expansion component 3 continuously cooperate to transform the direct radial expansion into multiple radial hammering, so that the sleeve position is fatigued and gradually expands outward, thereby completing the shaping process.

[0045] Finally, it should be noted that the above is only the preferred principle of the present invention and does not limit the present invention. Although the present invention is described in detail with reference to the signed embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. At the same time, the number of components in this article is only for structural explanation. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary shock expansion shaper, characterized in that Including expansion components, hydraulic impact components, connection components: The expansion assembly comprises: an impact head (301), a disc spring (302), a reset rubber strip (303), an expansion sheet (304), a slider (305), and a slide groove (306); the impact head (301) is clamped in the shell and passes through the limiting hole (105), and a disc spring (302) is installed between the shell (103) and the impact head (301); every two expansion sheets (304) are slidably connected with the slide groove (306) through the slider (305), and are connected in series with each other through the reset rubber strip (303); the expansion sheet is integrally sleeved on the shell (103), and the conical surface on one side contacts the conical surface of the impact head (301), and the conical surface on the other side contacts the shell (103); The hydraulic impact assembly comprises: a guide block (201), a shock block (202), a plunger (203), a first guide pipe (204), a second guide pipe (205), a first guide groove (206), a second guide groove (207), a first chamber (208), and a second chamber (209). The shock block (202) is provided with a first chamber (208) for the plunger (203) to pass through, and two guide grooves are provided on the side, respectively. A first guide groove (206) and a second guide groove (207) are connected to the second guide pipe (205) through the first guide pipe (204), and a second chamber (209) is provided at the bottom for the pressure relief pipe (106) to pass through; the top of the guide block (201) contacts the joint (101) and the bottom contacts the protrusion of the shell (103), the protrusion plays a limiting role, and the top of the plunger (203) is connected to the bottom of the guide block (201) through a thread; The connection assembly comprises: a joint (101), a buffer rubber ring (102), a shell (103), a guide head (104), a limiting hole (105), a pressure relief pipe (106), a third guide groove (107), and a fourth guide groove (108); the bottom of the shell (103) is provided with a limiting hole (105) through which the impact head (301) can pass, and the inside is provided with a third guide groove (107) and a fourth guide groove (108) that match the hydraulic impact assembly (2); the joint (101) and the shell (103) are fixedly connected by threads; the pressure relief pipe (106) is arranged in a threaded hole reserved in the shell (103) and is fixedly connected by threads; the top of the pressure relief pipe (106) is provided with a buffer rubber ring (102), and the bottom is connected to the guide head (104) by threads.

2. A rotary shock expansion and shaping device according to claim 1, characterized in that: The conical surface of the impact head (301) is divided into four evenly spaced petals on the same circumference, with a hole in the middle for the pressure relief pipe (106) to pass through.

3. The rotary shock expansion shaper according to claim 1, characterized in that: The bottom of the pressure relief pipe (106) is conical, and the pressure relief pipe (106) passes through the threaded hole reserved at the bottom of the shell (103) to achieve a fixed connection with the shell (103), thereby ensuring that the rear end of the expansion piece (304) is boosted during expansion.

4. The rotary shock expansion shaper according to claim 1, characterized in that: The shock block (202) has a No. 1 chamber (208) at the top and a No. 2 chamber (209) at the bottom. The minimum diameter of the top of the No. 1 chamber (208) and the diameter of the No. 2 chamber (209) are respectively the same as the outer diameters of the plunger (203) plug and the pressure relief pipe (106), so that the pressure holding and pressure relief function is achieved under the action of the sealing ring. The shock block (202) has a No. 1 guide groove (206) on one side and is connected to the No. 1 chamber (208) through the No. 1 guide pipe (204), and has a No. 2 guide groove (207) on the other side and is connected to the No. 1 chamber (208) through the No. 2 guide pipe. (205) is connected with the second chamber (209); the shell (103) is provided with a third guide groove (107) and a fourth guide groove (108), and the positions of the third guide groove (107) and the fourth guide groove (108) need to be determined according to the shock block (202), the depth of the first chamber (208), the depth of the second chamber (209), the first guide groove (206), the second guide groove (207), the extension length of the pressure relief pipe (106), and the length of the plunger (203), so as to ensure that the various components cooperate with each other to achieve pressure holding and pressure relief during the shock process.

5. The rotary shock expansion shaper according to claim 1, characterized in that: The guide block shrinks the liquid flow channel input by the hydraulic cylinder to 10mm.

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