Hydraulic impact pressurized eye finder

Abstract

The present application belongs to oilfield exploitation equipment, disclose a kind of hydraulic impact pressurized eye-finding tool, including impact cone shell, impact cone key shaft and vibration mechanism.Impact cone key shaft is slidably connected with impact cone shell, impact cone key shaft is hollow in axial direction and is formed with drilling fluid flow channel, first pressure relief hole is provided on impact cone key shaft, and first pressure relief hole is communicated with drilling fluid flow channel, impact cone shell inner cavity.Vibration mechanism includes shell, plug, mobile setting and elastic member.The hydraulic impact pressurized eye-finding tool includes two working modes of impact and gouging operation and pressurized impact operation, in pressurized impact operation state, impact cone key shaft can reciprocate along axial direction, form the impact and gouging operation mode with vibration pressurization, solve the deficiency of eye-finding in simple impact and gouging operation mode, enrich the working mode of eye-finding tool, in partially or totally collapsed open hole section, can effectively improve the success rate of eye-finding, avoid new hole, improve the working efficiency of eye-finding.

Description

Technical Field

[0001] This invention relates to the field of oilfield extraction equipment technology, and in particular to a hydraulic impact pressurized eye-finding tool. Background Technology

[0002] During the sealing of old wells in gas storage facilities, due to their age, some or all of the open-hole sections have collapsed. It is necessary to use locating tools to find the original wellbore and successfully drill to the bottom. However, current locating tools mostly use drill bit guides to flush and scuff with high-pressure drilling fluid, a single working method. If a completely collapsed wellbore is encountered, flushing with high-pressure drilling fluid alone is unreliable and ineffective. It is necessary to pull out the drill bit and run in tools with cutting capabilities, which may create a new wellbore, damaging the old well, increasing the difficulty of locating the well, resulting in high operating costs and a long construction period. Summary of the Invention

[0003] The purpose of this invention is to provide a hydraulic impact pressurization eye-finding tool, which can enrich the eye-finding operation mode and effectively improve the work efficiency of eye-finding.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A hydraulic impact pressurized eye-finding tool includes:

[0006] A punch-cone housing, wherein the punch-cone housing is axially hollow;

[0007] A punch key shaft is slidably connected to the punch housing. The punch key shaft is axially hollow and forms a drilling fluid flow channel. A first pressure relief hole is provided on the punch key shaft. The first pressure relief hole communicates with the drilling fluid flow channel and the inner cavity of the punch housing.

[0008] Vibration mechanism, the vibration mechanism comprising:

[0009] The outer shell is installed inside the punch housing. The outer shell is hollow inside and has an opening at one end. A second pressure relief hole is provided on the side wall of the outer shell. The second pressure relief hole can communicate with the inner cavity of the outer shell and the inner cavity of the punch housing.

[0010] A plug is installed at the open end of the outer casing, and the plug has a through hole.

[0011] The movable setting seal is axially hollow and slidably installed inside the housing. One end of the punch key shaft passes through the housing and is connected to the movable setting seal. The movable setting seal is connected to the drilling fluid flow channel. A ball-throwing setting part is provided inside the movable setting seal, and a sealing part capable of sealing the second pressure relief hole is provided on the outer periphery of the movable setting seal.

[0012] An elastic element is installed inside the housing, with one end of the elastic element connected to the plug and the other end connected to the movable seat seal;

[0013] During the flushing operation, the sealing part covers the second pressure relief hole, and the drilling fluid flows into the flushing cone key shaft through the flushing cone housing and the vibration mechanism, and then flows out through the drilling fluid flow channel;

[0014] Under pressurized impact operation, the ball falls into the ball-setting seat and abuts against it to seal. After the drilling fluid flows into the vibration mechanism, the hydraulic pressure inside the outer shell increases, pushing the movable seat and the punch key shaft to move downwards synchronously. When the second pressure relief hole is exposed, the drilling fluid flows into the drilling fluid channel through the second pressure relief hole, the inner cavity of the punch shell, and the first pressure relief hole. The inner cavity of the outer shell is depressurized, and the movable seat and the punch key shaft are reset under the action of the elastic element.

[0015] Optionally, the end of the punch key shaft away from the punch housing is provided with a primary cutting tooth.

[0016] Optionally, the punch housing is provided with secondary cutting teeth.

[0017] Optionally, the inner circumference of the punch housing is provided with a spline groove, and the outer circumference of the punch key shaft is provided with spline teeth, the spline teeth being slidably connected to the spline groove.

[0018] Optionally, a guide slope is provided on the outer periphery of the via.

[0019] Optionally, the elastic element includes a disc spring.

[0020] Optionally, multiple second pressure relief holes are provided, spaced apart along the circumference of the housing.

[0021] Optionally, multiple first pressure relief holes are provided, spaced apart circumferentially along the axis of the punch key.

[0022] Optionally, the diameter of the second pressure relief hole is less than or equal to the axial height of the sealing portion.

[0023] Optionally, the outer wall of the movable seat forms a receiving cavity with the inner wall of the outer shell, and the movable seat is provided with a communicating hole that communicates with the receiving cavity and the inner cavity of the movable seat.

[0024] The beneficial effects of this invention are:

[0025] The hydraulic impact pressurized hole-finding tool of this invention enables the punch key shaft to reciprocate up and down along the axial direction, forming a punching operation mode with vibration and pressurization. This solves the shortcomings of the simple punching operation mode for hole finding, enriches the working modes of the hole-finding tool, and can effectively improve the success rate of hole finding in partially or completely collapsed open hole sections, avoid the formation of new well holes, reduce the occurrence of complex downhole conditions, and enable smooth wellbore to the bottom of the well, thereby improving the efficiency of hole finding. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the hydraulic impact pressurized eye-finding tool described in this embodiment of the invention under pressurized impact operation.

[0027] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0028] Figure 3 This is a schematic diagram of the structure of the punched cone shell according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the punch-taper key shaft according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the outer shell structure according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the plug structure according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the movable seat as described in an embodiment of the present invention.

[0033] In the picture:

[0034] 1. Punch housing; 11. Secondary cutting teeth; 12. Spline groove;

[0035] 2. Tapered key shaft; 21. First pressure relief hole; 22. First-stage cutting tooth; 23. Spline tooth; 24. Drilling fluid flow channel;

[0036] 3. Vibration mechanism; 31. Housing; 311. Second pressure relief hole; 32. Plug; 321. Through hole; 3211. Guide slope; 33. Movable seat; 331. Ball-throwing seat part; 332. Sealing part; 333. Receiving cavity; 334. Connecting hole; 34. Elastic element;

[0037] 100. Pitch. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0042] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1-7 As shown, this invention provides a hydraulic impact pressurized drilling tool, including a cone housing 1, a cone key shaft 2, and a vibration mechanism 3. The cone housing 1 is axially hollow, and the cone key shaft 2 is slidably connected to the cone housing 1. The cone key shaft 2 is axially hollow and forms a drilling fluid flow channel 24. Multiple first pressure relief holes 21 are provided on the cone key shaft 2, spaced apart circumferentially along the cone key shaft 2. Figure 2 and Figure 4As shown, the first pressure relief hole 21 is connected to the drilling fluid flow channel 24 and the inner cavity of the punch housing 1. The vibration mechanism 3 includes a housing 31, a plug 32, a movable seat 33, and an elastic element 34. Figure 1 and Figure 2 As shown, the outer casing 31 is installed inside the punch housing 1. The outer casing 31 is hollow inside and has an opening at one end. Multiple second pressure relief holes 311 are provided on the side wall of the outer casing 31, spaced apart along the circumference of the outer casing 31. Figure 5 As shown, the second pressure relief hole 311 can communicate with the inner cavity of the outer casing 31 and the inner cavity of the punch housing 1. The plug 32 is installed at the open end of the outer casing 31, and has a through hole 321. The movable seat 33 is slidably installed inside the outer casing 31, as shown. Figure 2 As shown, the shaft is axially hollow. One end of the punch key shaft 2 passes through the outer shell 31 and connects to the movable seat 33. The movable seat 33 communicates with the drilling fluid flow channel 24. A ball-throwing seat 331 is provided inside the movable seat 33. When a ball is thrown into the movable seat 33, the ball 100 can fall into the ball-throwing seat 331 and abut against the periphery of the ball-throwing seat 331 to seal it. A sealing part 332 that can cover the second pressure relief hole 311 is provided on the outer periphery of the movable seat 33. An elastic element 34 is installed inside the outer shell 31. One end of the elastic element 34 is connected to the plug 32, and the other end is connected to the movable seat 33. In this embodiment, the elastic element 34 is preferably a disc spring.

[0044] The hydraulic impact pressurized eye-finding tool in this embodiment mainly includes two operating modes: a shoveling operation mode (before throwing) and a pressurized impact operation mode (after throwing). The working process and principle are as follows:

[0045] In the flushing operation mode, the high-pressure drilling fluid ejected by the hydraulic impact pressure-type hole-finding tool is used solely for hole finding. In this mode, no balls are thrown into the vibration mechanism 3, and the vibration mechanism 3 does not reciprocate. In this mode, the sealing part 332 covers the second pressure relief hole 311. The drilling fluid flows through the punch housing 1, plug 32, elastic element 34, movable seat 33, and into the drilling fluid channel 24 of the punch key shaft 2, and is ejected through the drilling fluid channel 24. The drilling fluid discharge rate is ≤32L / S, forming an impact jet state, and hole finding is performed by the flushing action of the drilling fluid. If the hydraulic impact pressure-type hole-finding tool still cannot move in the flushing operation mode, it enters the pressure impact operation mode.

[0046] Under pressure and impact operation, the ball-throwing operation is performed first, that is, the ball is thrown into the vibration mechanism 3. The ball 100 falls into the ball-throwing seat 331 on the movable seat 33 after passing through the plug 32 and the elastic element 34, and abuts and seals against the ball-throwing seat 331. Figure 2As shown, after the drilling fluid flows through the cone housing 1, plug 32, and elastic element 34 to the movable set seal 33, the hydraulic pressure inside the outer shell 31 increases as the drilling fluid continuously enters due to the blockage formed by the ball 100 and the ball set seal 331. As the hydraulic pressure inside the outer shell 31 continuously increases, the movable set seal 33 and the cone key shaft 2 can move downward synchronously under the action of the hydraulic pressure inside the shell. When the second pressure relief hole 311 is exposed, that is, when the plug 332 and the second pressure relief hole 311 can no longer form a blockage, the drilling fluid flows into the drilling fluid flow channel 24 through the second pressure relief hole 311, the inner cavity of the cone housing 1, and the first pressure relief hole 21. The inner cavity of the outer shell 31 is depressurized, and the movable set seal 33 and the cone key shaft 2 move upward and reset under the action of the elastic element 34. After the pressure inside the outer shell 31 is released and the movable seat 33 moves upward and resets, the sealing part 332 re-seals the second pressure relief hole 311. The hydraulic pressure inside the outer shell 31 will increase again as drilling fluid continues to enter. Repeating the above actions allows the punch key shaft 2 to move up and down along the axial direction, forming a punching operation mode with vibration and pressure. The vibration rate can reach 5-10HZ and the amplitude can reach 150-240mm. This solves the shortcomings of finding holes in the simple punching operation mode, enriches the working mode of the hole finding tool, and can effectively improve the success rate of hole finding in partially or completely collapsed open hole sections, avoid the formation of new well holes, reduce the occurrence of complex downhole conditions, and enable smooth wellbore to the bottom of the well, thus improving the efficiency of hole finding.

[0047] Optionally, in this embodiment, the end of the punch key shaft 2 away from the punch housing 1 is provided with a first-stage cutting tooth 22, and the punch housing 1 is provided with a second-stage cutting tooth 11. When the first-stage cutting tooth 22 completely enters the old wellbore, it can continue to punch downwards through the second-stage cutting tooth 11 to enlarge the old wellbore, making the old wellbore smooth and unobstructed.

[0048] Optionally, such as Figure 3 and Figure 4 As shown, a spline groove 12 is provided on the inner circumference of the punch housing 1, and a spline tooth 23 is provided on the outer circumference of the punch key shaft 2. In this embodiment, the punch housing 1 and the punch key shaft 2 are slidably connected by the spline tooth 23 and the spline groove 12.

[0049] Optionally, a guide slope 3211 is provided on the outer periphery of the through hole 321. The guide slope 3211 serves as a guide so that drilling fluid or ball 100 can enter the vibration mechanism 3.

[0050] Optionally, the diameter of the second pressure relief hole 311 is less than or equal to the axial height of the sealing part 332, so that the sealing part 332 can effectively seal the second pressure relief hole 311.

[0051] Optionally, such as Figure 2As shown, the outer circumferential wall of the movable set 33 and the inner circumferential wall of the outer shell 31 form a receiving cavity 333. The movable set 33 is provided with a connecting hole 334, which communicates with the receiving cavity 333 and the inner cavity of the movable set 33. When the ball 100 and the ball set 331 form a blockage, some of the drilling fluid in the movable set 33 can enter the receiving cavity 333 formed by the outer circumferential wall of the movable set 33 and the inner circumferential wall of the outer shell 31 through the connecting hole 334, which facilitates pushing the movable set 33 downward.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A hydraulic impact pressurized eye-finding tool, characterized in that, include: A punch cone housing (1), wherein the punch cone housing (1) is axially hollow; The punch key shaft (2) is slidably connected to the punch housing (1). The punch key shaft (2) is axially hollow and forms a drilling fluid flow channel (24). The punch key shaft (2) is provided with a first pressure relief hole (21). The first pressure relief hole (21) is connected to the drilling fluid flow channel (24) and the inner cavity of the punch housing (1). Vibration mechanism (3), the vibration mechanism (3) includes: The outer shell (31) is installed inside the punch housing (1). The outer shell (31) is hollow inside and has an opening at one end. The side wall of the outer shell (31) is provided with a second pressure relief hole (311). The second pressure relief hole (311) can communicate with the inner cavity of the outer shell (31) and the inner cavity of the punch housing (1). A plug (32) is installed at the open end of the outer casing (31), and a through hole (321) is provided on the plug (32); The movable set seal (33) is axially hollow and slidably installed inside the housing (31). One end of the punch key shaft (2) passes through the housing (31) and is connected to the movable set seal (33). The movable set seal (33) is connected to the drilling fluid flow channel (24). The movable set seal (33) is provided with a ball-throwing set seal part (331) inside. The movable set seal (33) is provided with a sealing part (332) on the outer periphery that can cover the second pressure relief hole (311). An elastic element (34) is installed inside the housing (31). One end of the elastic element (34) is connected to the plug (32), and the other end is connected to the movable seat (33). During the flushing operation, the sealing part (332) covers the second pressure relief hole (311), and the drilling fluid flows into the flushing key shaft (2) through the flushing cone housing (1) and the vibration mechanism (3), and flows out through the drilling fluid flow channel (24); Under pressurized impact operation, the ball (100) falls into the ball-setting seat (331) and abuts and seals against the ball-setting seat (331). After the drilling fluid flows into the vibration mechanism (3), the hydraulic pressure in the inner cavity of the outer shell (31) increases, pushing the movable seat (33) and the punch key shaft (2) to move downward synchronously. When the second pressure relief hole (311) is exposed, the drilling fluid flows into the drilling fluid channel (24) through the second pressure relief hole (311), the inner cavity of the punch shell (1), and the first pressure relief hole (21). The inner cavity of the outer shell (31) is depressurized, and the movable seat (33) and the punch key shaft (2) are reset under the action of the elastic element (34).

2. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, The end of the punch key shaft (2) away from the punch housing (1) is provided with a first-stage cutting tooth (22).

3. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, The punch housing (1) is provided with secondary cutting teeth (11).

4. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, The inner circumference of the punch housing (1) is provided with a spline groove (12), and the outer circumference of the punch key shaft (2) is provided with spline teeth (23), and the spline teeth (23) are slidably connected to the spline groove (12).

5. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, A guide slope (3211) is provided on the outer periphery of the through hole (321).

6. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, The elastic element (34) includes a disc spring.

7. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, The second pressure relief hole (311) is provided in multiple locations, and is spaced apart along the circumference of the outer shell (31).

8. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, Multiple first pressure relief holes (21) are provided, and they are spaced apart circumferentially along the punch key axis (2).

9. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, The diameter of the second pressure relief hole (311) is less than or equal to the axial height of the sealing part (332).

10. The hydraulic impact pressurized eye-finding tool according to claim 1, characterized in that, The outer wall of the movable seat (33) and the inner wall of the outer shell (31) form a receiving cavity (333) in the circumferential direction. The movable seat (33) is provided with a connecting hole (334), which communicates with the receiving cavity (333) and the inner cavity of the movable seat (33).

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