One-trip multi-layer gravel filling pipe column sliding sleeve opening and closing tool and filling pipe column assembly

Abstract

The invention discloses a one-trip multi-layer gravel filling pipe column sliding sleeve opening and closing tool and a filling pipe column assembly, and belongs to the technical field of oil exploitation equipment. The multi-layer gravel filling pipe column sliding sleeve opening and closing tool comprises a first connector, a spacer sleeve, a locking piece, a spring and a second connector. A locking groove is formed in the circumferential side face of the first connector, the first connector is sleeved with the spacer sleeve, the first connector is sleeved with the second connector, and the spacer sleeve and the second connector extend to cover notch areas on the two opposite sides of the locking groove respectively. The locking piece is arranged in the locking groove and can slide in the depth direction of the locking groove, and the spring is connected between the groove bottom of the locking groove and the locking piece in an abutting mode. A first guide inclined surface and a second guide inclined surface which are inclined towards the middle part are arranged on two axial side surfaces of the locking piece; and a clamping groove matched with the boss on the sliding sleeve is arranged between the first guide inclined surface and the second guide inclined surface. According to the multi-layer gravel filling pipe column sliding sleeve opening and closing tool and the filling pipe column assembly, the efficiency of sliding sleeve opening and closing operation can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of oil production equipment, and in particular relates to a one-trip multi-layer gravel-packed pipe column sliding sleeve opening and closing tool and a packing pipe column assembly. Background Art

[0002] The one-trip multi-layer gravel packing process is to carry out gravel packing and sand prevention operations for each oil layer in multiple oil layers in a differentiated and targeted manner. A filling window corresponding to each oil layer is opened on the outer pipe string, and each filling window is provided with a filling sleeve corresponding to the filling window. The filling sleeve can be moved up and down along the axial direction of the outer pipe string to realize the closing and opening of the filling window to cooperate with the filling operation. Usually, the filling sleeve can be hooked by a switch tool carried by a steel wire or a service pipe string to drive the filling sleeve to move; however, a one-trip pipe string can only open or close a certain sleeve alone, so multiple operations are required to complete the opening and closing operations of multiple oil layer filling sleeves, which cannot meet the needs of one-trip multi-layer gravel packing operations, making the filling operation efficiency unsatisfactory. Summary of the invention

[0003] The present application provides a one-pass multi-layer gravel packing column sliding sleeve opening and closing tooling and a packing column assembly, which aims to at least to some extent solve the technical problem that the opening and closing operation of the filling sliding sleeve in the one-pass multi-layer gravel packing process requires multiple passes and the operation efficiency is not ideal. To this end,

[0004] A multi-layer gravel-packed pipe column sliding sleeve opening and closing tool provided in an embodiment of the present application comprises: a first joint, a stopper sleeve, a locking piece, a spring and a second joint;

[0005] A locking groove is formed on the circumferential side of the first joint, the stopper sleeve is sleeved on the first joint, the second joint is sleeved on the first joint, and the stopper sleeve and the second joint respectively extend to cover the notch areas on both sides of the locking groove;

[0006] The locking member is arranged in the locking groove and can slide along the depth direction of the locking groove, and the spring abuts between the groove bottom of the locking groove and the locking member, so as to elastically push the locking member to abut against the stopper sleeve and the second joint at the notch areas on both sides of the locking groove, and constrain the locking member in the locking groove;

[0007] The first and second guiding bevels inclined toward the middle are provided on both axial side surfaces of the locking member, and a snap-in groove matching the boss on the sliding sleeve is provided between the first and second guiding bevels, so that during the axial movement of the first joint, the first guiding bevel or the second guiding bevel abuts against the boss to make the locking member move toward the bottom of the locking groove, thereby preventing the boss from continuing to move, until the snap-in groove is aligned and snap-in with the boss, and pushes and pulls the sliding sleeve to move.

[0008] In some embodiments, the one-trip multi-layer gravel packing pipe column sliding sleeve opening and closing tool further includes: a thrust piece and a shear pin;

[0009] The thrust member is disposed in the gap between the first joint and the second joint and is locked to the first joint by the shear pin;

[0010] The thrust member is arranged on one side of the locking member to limit the axial movement range of the locking member along the first joint.

[0011] In some embodiments, a limiting groove is provided on the locking member, and one end of the spring is disposed in the limiting groove.

[0012] In some embodiments, the number of the limiting grooves is two, and the two limiting grooves are symmetrically arranged on both sides of the clamping groove.

[0013] In some embodiments, the first connector is a tubular member, and a first end of the first connector is provided with an internal thread, and a second end of the first connector is connected to the second connector.

[0014] In some embodiments, the second connector is a tubular member, and the first end of the second connector is threadedly connected to the outside of the second end of the first connector, and the second end of the second connector is provided with an external thread.

[0015] In some embodiments, there are multiple locking members, and the multiple locking members are arranged at intervals on the outer circumferential surface of the first joint.

[0016] Another aspect of the embodiment of the present application further provides a packing string assembly, comprising: an outer string, a sliding sleeve, and a multi-layer gravel packing string sliding sleeve opening and closing tooling;

[0017] The outer pipe column is provided with an expanded diameter section, the expanded diameter section is provided with a filling window, the sliding sleeve is slidably arranged inside the expanded diameter section, and the sliding stroke of the sliding sleeve covers the filling window to realize the opening and closing of the filling window;

[0018] The sliding sleeve is provided with a boss, and in the axial direction of the first joint, the thickness of the boss is smaller than the width of the clamping groove;

[0019] After the sliding sleeve opens or closes the filling window to a preset opening, the second guide bevel or the first guide bevel correspondingly presses against the end of the expanded diameter section, so that in the process of continuing to open or close the filling window, the locking piece gradually moves away from the sliding sleeve until the boss disengages from the snap-in groove after the filling window is opened or closed in place.

[0020] In some embodiments, the two ends of the expanded diameter section are connected to the main body of the outer pipe column through a first connecting bevel and a second connecting bevel respectively.

[0021] In some embodiments, the sliding sleeve is a cylindrical member, and the boss is an annular boss opened on the inner wall of the sliding sleeve.

[0022] The embodiments of the present application have at least the following beneficial effects:

[0023] The embodiment of the present application provides a multi-layer gravel packing pipe column sliding sleeve opening and closing tool and a packing pipe column assembly. A locking groove is provided on the first joint and cooperates with a spring to accommodate and elastically push the locking piece to elastically rise and fall on the side circumferential surface of the first joint, and the two ends of the locking piece are stopped by the stop sleeve and the second joint to maintain the stable rising and falling movement of the locking piece; and a clamping groove and guide inclined surfaces on both sides are provided on the locking piece, so that when the locking piece moves with the first joint and passes through the boss on the sliding sleeve, the thrust can be received by the guide inclined surface, and the locking piece can be pushed to sink into the locking groove to maintain the passability, and the clamping groove and the boss can be immediately clamped after the alignment, and the boss and the locking piece can be connected, so that the filling window on the outer pipe column can be opened and closed by pushing and pulling the first joint and the sliding sleeve, so that the adaptive cooperation of the guide inclined surface, the spring and the locking piece and the boss can realize efficient and stable locking operation, thereby improving the opening and closing operation efficiency of the sliding sleeve. On the other hand, corresponding numbers of opening and closing tools can be configured for multiple oil layers, so that multiple layers can be touched in one trip, the opening and closing control of multiple sliding sleeves can be realized, and the filling operation efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a multi-layer gravel packing column sliding sleeve opening and closing tooling in an embodiment of the present application is shown;

[0026] Figure 2 Shows Figure 1 A schematic diagram of the structure of the locking parts in the sliding sleeve opening and closing tooling of a multi-layer gravel-packed pipe string;

[0027] Figure 3 A structural schematic diagram showing an open state 1 of a filling column assembly in an embodiment of the present application is shown;

[0028] Figure 4A structural schematic diagram showing the second open state of the filling column assembly in the embodiment of the present application is shown;

[0029] Figure 5 A structural schematic diagram showing the third open state of the filling column assembly in the embodiment of the present application is shown;

[0030] Figure 6 A structural schematic diagram showing an open state 4 of a packing column assembly in an embodiment of the present application is shown;

[0031] Figure 7 A structural schematic diagram of the open state five of the filling column assembly in an embodiment of the present application is shown.

[0032] Reference numerals:

[0033] 100-upper first joint, 110-locking groove, 120-thrust member, 121-shear pin, 130-internal thread;

[0034] 200-block sleeve;

[0035] 300-locking member, 310-isosceles trapezoidal member, 311-first stop end, 312-first guide slope, 313-locking surface, 314-second guide slope, 315-second stop end, 316-limiting groove, 317-clamping groove, 317a-first pushing top portion, 317b second pushing top portion;

[0036] 400-spring;

[0037] 500-second joint, 510-fastening pin, 520-external thread;

[0038] 600-outer pipe column, 610-expanded diameter section, 611-first connecting slope, 612-second connecting slope, 613-filling window;

[0039] 700-sleeve, 710-boss. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0042] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0043] A multi-layer gravel packing process is to carry out gravel packing and sand prevention operations for each oil layer in multiple oil layers in a differentiated and targeted manner. A filling window corresponding to each oil layer is opened on the outer pipe column, and each filling window is provided with a filling sleeve correspondingly. The filling sleeve can move up and down along the axial direction of the outer pipe column to close and open the filling window to cooperate with the filling operation. In the prior art, in order to operate the filling sleeve, a switch tool is used with a pipe column or a steel wire to hook onto a certain sleeve, and the sleeve is pushed and pulled up and down, which is cumbersome to operate; and when operating the sleeves of multiple oil layers, corresponding independent adjustments are required, and the opening and closing operations of the sleeves are performed multiple times; the overall operating efficiency is not ideal.

[0044] To this end, the present application provides a multi-layer gravel-packed tubular sleeve opening and closing tooling and a filling tubular sleeve assembly, which aims to improve the convenience of slideway operation to a certain extent, improve the efficiency of sleeve opening and closing operation, and be able to realize the opening and closing operation of a multi-layer sleeve to a certain extent, thereby improving the efficiency of the overall filling operation.

[0045] Figure 1 A schematic diagram of the structure of a multi-layer gravel packing column sliding sleeve opening and closing tooling in an embodiment of the present application is shown; Figure 2 Shows Figure 1 Schematic diagram of the structure of the locking parts in the sliding sleeve opening and closing tooling of a multi-layer gravel packing pipe string.

[0046] See also Figure 1 and Figure 2 In some embodiments, the multi-layer gravel-packed tubular column sliding sleeve opening and closing tool comprises: a first joint 100, a stopper sleeve 200, a locking member 300, a spring 400 and a second joint 500.

[0047] Among them, a locking groove 110 is opened on the circumferential side of the first joint 100, and the locking piece 300 can be slidably arranged in the locking groove 110, and the sliding direction of the locking piece 300 is the depth direction of the locking groove 110, that is, the locking piece 300 can rise and fall in the locking groove 110, that is, the locking piece 300 can protrude from the circumferential side of the first joint 100, and can also sink a certain amplitude in the direction of the axial center line of the first joint 100.

[0048] Thus, the locking piece 300 can be connected to the boss on the sliding sleeve by protruding from the circumferential side of the first joint 100 and correspondingly snapping into the boss on the sliding sleeve at an appropriate position, so as to connect the sliding sleeve to the first joint 100, so that the sliding sleeve can be pushed and pulled relative to the outer pipe column by pushing and pulling the first joint 100 to open and close the filling window. It can also sink into the locking groove 110 to disengage the locking piece 300 from the boss of the sliding sleeve, so that the tooling can be recovered after the sliding sleeve moves into place.

[0049] In order to maintain the locking state of the locking member 300, the spring 400 elastically abuts between the locking member 300 and the bottom of the locking groove 110, so that the spring 400 can elastically push the locking member 300 out of the locking groove 110, and then maintain the locking member 300 and the boss of the sliding sleeve.

[0050] The locking member 300 may be provided with a snap-fitting groove 317 for fitting and snap-fitting the boss on the sliding sleeve. Considering that the locking member 300 protrudes from the first joint 100 under the action of the spring 400, in order to facilitate the first joint 100 to pass through the outer pipe column and reduce the influence of the locking member 300 on its passability, a first guiding slope 312 and a second guiding slope 314 may be provided on the locking member 300; they are symmetrically arranged on both sides of the snap-fitting groove 317 and inclined toward the middle snap-fitting groove 317. The first guiding slope 312 and the second guiding slope 314 may be arranged in the moving direction of the first joint 100, that is, in the axial direction of the first joint 100; so that when the first joint 100 encounters an obstacle during its movement, the first guiding slope 312 and the second guiding slope 314 can transform the direction of the external force, generate a thrust along the depth direction of the locking groove 110, and cause the locking member 300 to sink to a certain extent to the bottom of the groove to avoid obstacles, so as to maintain the passability of the first joint 100.

[0051] Correspondingly, when the locking member 300 moves to the position of the sliding sleeve, the first guide bevel 312 or the second guide bevel 314 will abut against the boss on the sliding sleeve, causing the locking member 300 to sink a certain distance into the locking groove 110, thereby ensuring that the locking surface 313 of the locking member 300 can abut against the boss and continue to move until the engaging groove 317 is matched and engaged with the boss, thereby achieving the locking of the locking member 300 and the sliding sleeve.

[0052] In order to take into account both the simplicity of processing and the installation stability of the locking member 300, and to prevent the locking member 300 from being separated from the locking groove 110, the stopper sleeve 200 and the second joint 500 can be sleeved on the first joint 100, and the stopper sleeve 200 and the second joint 500 can be respectively extended to cover the opposite two side notch areas of the locking groove 100, correspondingly stopping the two ends of the locking member 300, namely the first stopper end 311 and the second stopper end 315. Therefore, the spring 400 can elastically push the locking member 300 to abut against the stopper sleeve 200 and the second joint 500 at the two side notch areas of the locking groove 110, and constrain the locking member 300 in the locking groove 110.

[0053] It is worth mentioning that the spring 400, the locking piece 300 and the two guiding slopes thereon can adaptively cooperate with the boss on the sliding sleeve. When the tooling passes through the sliding sleeve, the engaging groove 110 and the boss of the sliding sleeve are adaptively engaged, thereby eliminating the need for complicated adjustment operations, which can improve the operating efficiency of the sliding sleeve to a certain extent. At the same time, based on the adaptive locking function, multiple sets of tooling can be synchronously set up to correspond to multiple oil layers, thereby realizing the opening and closing operation of the sliding sleeve for multiple oil layers.

[0054] In some embodiments, considering that there are many kinds of debris such as gravel in the working environment of the tooling, there is a risk of the sleeve getting stuck, which will accordingly cause the locking piece 300 and the first joint 100 to be restricted underground; for this reason, the one-trip multi-layer gravel packing column sleeve opening and closing tooling may also include: a thrust piece 120 and a shear pin 121.

[0055] Specifically, the thrust member 120 can be fixed on the first joint 100 through the shear pin 121, and is arranged in the gap between the first joint 100 and the second joint 500, and the axial end of the locking member 300 is abutted against the thrust member 120 to limit the axial movement of the locking member 300 along the first joint 100; and when the sliding sleeve is stuck, a large force is applied to the first joint 100, so that the locking member 300 and the first joint 100 and the thrust member 120 thereon form a relative movement in the axial direction of the first joint 100, thereby prompting the thrust member 120 to shear the shear pin 121 with great force. At the same time, the locking member 300 can move relative to the second joint 500, prompting the second guide slope 314 to abut against the end of the second joint 500, thereby forcing the locking member 300 to move into the locking groove 110, thereby forcibly separating the locking member 300 and the boss of the sliding sleeve, so that the first joint 100 can be removed.

[0056] It is worth noting that the thrust member 120 can be specifically fixed to a notch on one side of the locking groove 110; the notch corresponding to the thrust member 120 can be further set to be slightly lower than the notches in other areas to ensure that the thrust member 120 can abut against the end of the locking member 300 after installation.

[0057] The gap between the first joint 100 and the second joint 500 should be large enough to allow the thrust member 120 to shear off the shear pin.

[0058] Generally speaking, the locking member 300 can be configured as an isosceles trapezoidal member 310, and the snap-in groove 317 is arranged in the upper bottom area of ​​the isosceles trapezoidal member 310; the first stop end 311 and the second stop end 315 can be respectively arranged at the lower bottom end of the isosceles trapezoidal member 310, and a certain flange can be further extended along the length direction of the lower bottom to facilitate the abutment against the stop sleeve 200 and the second joint 500; the first guide bevel 312 and the second guide bevel 314 can be arranged on the two waist side walls of the isosceles trapezoidal member 310.

[0059] In some embodiments, in order to facilitate the fixation of the spring 400, a limiting groove 316 can be opened on the locking member 300, and one end of the spring 400 is arranged in the limiting groove 316 to limit the swing and radial deformation amplitude of the spring 400, thereby ensuring the stability of its elastic torque and thus ensuring the reliability of the movement of the locking member 300.

[0060] In some embodiments, the number of the limiting grooves 316 may be two, and the two limiting grooves 316 are symmetrically arranged on both sides of the clamping groove 317. Accordingly, the number of the springs 400 may also be two, so that the locking member 300 is evenly stressed.

[0061] In some embodiments, the first joint 100 and the second joint 500 can both be configured as tubular parts, and the first end of the first joint 100 is provided with an internal thread for connecting to a service pipe column, and the second end is embedded and threaded in the first end of the second joint 500, and the second end of the second joint 500 is provided with an external thread for connecting to a pipe column below.

[0062] In some embodiments, the number of the locking members 300 can be set to multiple, and the multiple locking members 300 are arranged at intervals on the outer peripheral surface of the first joint 100, so that they can engage with the boss in the sliding sleeve at multiple points to improve the reliability of the opening and closing operation.

[0063] Figure 3 A structural schematic diagram showing an open state 1 of a filling column assembly in an embodiment of the present application is shown; Figure 4A structural schematic diagram showing the second open state of the filling column assembly in the embodiment of the present application is shown; Figure 5 A structural schematic diagram showing the third open state of the filling column assembly in the embodiment of the present application is shown; Figure 6 A structural schematic diagram showing an open state 4 of a packing column assembly in an embodiment of the present application is shown; Figure 7 A structural schematic diagram of the open state five of the filling column assembly in an embodiment of the present application is shown.

[0064] See also Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 In some embodiments, a packing string assembly is also provided, including: an outer string 600, a sleeve 700, and the above-mentioned multi-layer gravel packing string sleeve opening and closing tooling.

[0065] A filling window 613 is provided on the outer tube column 600, and the sliding sleeve 700 can be slidably arranged on the inner side of the outer tube column 600, and can be moved to cover and block the filling window 613 to realize the opening and closing of the filling window 613. When the locking member 300 moves to the boss 710 set on the sliding sleeve 700, it is adaptively engaged to complete the connection between the locking member 300 and the sliding sleeve 700, and the sliding sleeve 700 can be pushed and pulled.

[0066] In some embodiments, the sliding sleeve opening and closing tooling of the multi-layer gravel-packed tubing string can be connected to the service tubing to open the sliding sleeve 700 corresponding to a certain oil layer and keep it in a locked state to realize opening and closing operations at any time. Alternatively, multiple groups of the sliding sleeve opening and closing tooling of the multi-layer gravel-packed tubing string can be set to connect to the service tubing to realize the synchronous opening and closing operations of multiple sliding sleeves 700 corresponding to multiple oil layers.

[0067] In some embodiments, the sliding sleeve opening and closing tooling of the multi-layer gravel-packed tubing string can also be set as a removable tooling, that is, after the sliding sleeve 700 is moved into place, the lock on the sliding sleeve 700 is released, and the sliding sleeve 700 corresponding to other oil layers is operated or the sliding sleeve opening and closing tooling of the multi-layer gravel-packed tubing string is pulled out.

[0068] To this end, in order to unlock the locking piece 300 and the boss 710, an expanded diameter section 610 may be provided on the outer pipe column 600, the filling window 613 is provided on the expanded diameter section 610, and the sliding sleeve 700 may be correspondingly slidably provided on the inner side of the expanded diameter section 610; and in the axial direction of the first joint 100, the thickness of the boss 710 provided on the sliding sleeve 700 is smaller than the width of the snap-in groove 317, so that after the boss 710 is embedded in the snap-in groove 317, it can move along the axial direction of the first joint 100, that is, in the vertical direction, the boss 710 moves between the two axial groove walls of the snap-in groove 317, and can be respectively provided as a first pushing part 317a and a second pushing part 317b.

[0069] In coordination, the length of the expanded diameter section 610, the width of the locking piece 300, and the width specifications of the boss 710 and the snap-in groove 317 can be matched and set, so that after the sliding sleeve 710 opens or closes the filling window 613 to a preset opening, the second guide bevel 314 or the first guide bevel 312 correspondingly presses against the end of the expanded diameter section 610, that is, presses against the step existing in the connection area between the expanded diameter section 610 and the main body of the outer pipe column 600, so that when the locking piece 300 continues to move to continue to open or close the filling window 613, the locking piece 300 is gradually pushed away from the sliding sleeve 700 until the filling window 613 is opened or closed in place, and at this time the boss 710 is just out of the snap-in groove 317 to complete the unlocking.

[0070] In some embodiments, both ends of the expanded diameter section 610 are connected to the main body of the outer pipe column 600 through a first connecting bevel 611 and a second connecting bevel 612 , respectively, and smoothly match the first guiding bevel 312 and the second guiding bevel 314 .

[0071] The following describes the working process of the tooling by taking the downward movement of the sliding sleeve 700 as the opening direction.

[0072] See also Figure 3 and Figure 4 After the locking member 300 as a whole enters the area of ​​the expanded diameter section 610 , the second guide slope 314 will press against the boss 710 on the sliding sleeve 700 , causing a partial portion of the locking member 300 to pass through until the boss 710 is embedded in the snap-in groove 317 .

[0073] See also Figure 5The locking member 300 moves downward further until the first pushing portion 317a in the clamping groove 317 abuts against the boss 710, thereby pushing the boss 710 and the connected sliding sleeve 700 downward, gradually opening the filling window 613. During the process, the second guiding inclined surface 314 gradually approaches the second connecting inclined surface 612.

[0074] See also Figure 6 and Figure 7 After the sliding sleeve 700 descends a certain distance, the second guiding slope 314 presses against the second connecting slope 612. As the locking member 300 continues to descend, the locking member 300 will be gradually pushed away from the sliding sleeve 700 by the second connecting slope 612 in a direction perpendicular to the vertical direction; until the first pushing portion 317a is completely separated from the boss 710, the filling window 613 is opened and the locking member 300 is unlocked, waiting for the sliding sleeve operation of the next oil layer or closing the opened sliding sleeve 700.

[0075] When the opened sliding sleeve 700 needs to be closed, the above process can be reversed, and the specific process can be as follows.

[0076] After the locking member 300 moves upward and enters the area of ​​the expanded diameter section 610 as a whole, the first guide slope 312 will press against the boss 710 on the sliding sleeve 700, causing a partial portion of the locking member 300 to pass through until the boss 710 is embedded in the snap-in groove 317.

[0077] The locking member 300 moves upward further until the second pushing portion 317b in the clamping groove 317 abuts against the boss 710, thereby pushing the boss 710 and the connected sliding sleeve 700 upward, gradually closing the filling window 613. During the process, the first guiding inclined surface 312 gradually approaches the first connecting inclined surface 611.

[0078] After the sleeve 700 has ascended a certain distance, the first guiding slope 312 abuts against the first connecting slope 611. As the locking member 300 continues to ascend, the locking member 300 will be gradually pushed away from the sleeve 700 by the first connecting slope 611 in a direction perpendicular to the vertical direction; until the second pushing top portion 317b is completely separated from the boss 710, completing the closing and opening of the filling window 613 and the unlocking of the locking member 300, waiting for the sleeve operation of the next oil layer or opening the closed sleeve 700.

[0079] In some embodiments, the sliding sleeve 700 is a cylindrical member, and the boss 710 is an annular boss opened on the inner wall of the sliding sleeve 700 .

[0080] The embodiments of the present application have at least the following beneficial effects:

[0081] The embodiment of the present application provides a multi-layer gravel packing pipe column sliding sleeve opening and closing tool and a packing pipe column assembly. A locking groove is provided on the first joint and cooperates with a spring to accommodate and elastically push the locking piece to elastically rise and fall on the side circumferential surface of the first joint, and the two ends of the locking piece are stopped by the stop sleeve and the second joint to maintain the stable rising and falling movement of the locking piece; and a clamping groove and guide inclined surfaces on both sides are provided on the locking piece, so that when the locking piece moves with the first joint and passes through the boss on the sliding sleeve, the thrust can be received by the guide inclined surface, and the locking piece can be pushed to sink into the locking groove to maintain the passability, and the clamping groove and the boss can be immediately clamped after the alignment, and the boss and the locking piece can be connected, so that the filling window on the outer pipe column can be opened and closed by pushing and pulling the first joint and the sliding sleeve, so that the adaptive cooperation of the guide inclined surface, the spring and the locking piece and the boss can realize efficient and stable locking operation, thereby improving the opening and closing operation efficiency of the sliding sleeve. On the other hand, corresponding numbers of opening and closing tools can be configured for multiple oil layers, so that multiple layers can be touched in one trip, the opening and closing control of multiple sliding sleeves can be realized, and the filling operation efficiency can be improved.

[0082] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0083] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0084] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0085] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0086] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0088] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0089] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A one-trip multi-layer gravel packing column sliding sleeve opening and closing tool, characterized in that: include: A first joint, a stopper sleeve, a locking member, a spring and a second joint; A locking groove is formed on the circumferential side of the first joint, the stopper sleeve is sleeved on the first joint, the second joint is sleeved on the first joint, and the stopper sleeve and the second joint respectively extend to cover the notch areas on both sides of the locking groove; The locking member is arranged in the locking groove and can slide along the depth direction of the locking groove, and the spring abuts between the groove bottom of the locking groove and the locking member, so as to elastically push the locking member to abut against the stopper sleeve and the second joint at the notch areas on both sides of the locking groove, and constrain the locking member in the locking groove; The first and second guiding bevels inclined toward the middle are provided on both axial side surfaces of the locking member, and a snap-in groove matching the boss on the sliding sleeve is provided between the first and second guiding bevels, so that during the axial movement of the first joint, the first guiding bevel or the second guiding bevel abuts against the boss to make the locking member move toward the bottom of the locking groove, thereby preventing the boss from continuing to move, until the snap-in groove is aligned and snap-in with the boss, and pushes and pulls the sliding sleeve to move.

2. The multi-layer gravel packing column sliding sleeve opening and closing tool as claimed in claim 1, characterized in that: The multi-layer gravel-packed pipe column sliding sleeve opening and closing tooling also includes: a thrust piece and a shear pin; The thrust member is disposed in the gap between the first joint and the second joint and is locked to the first joint by the shear pin; The thrust member is arranged on one side of the locking member to limit the axial movement range of the locking member along the first joint.

3. The multi-layer gravel packing column sliding sleeve opening and closing tool as claimed in claim 1, characterized in that: The locking member is provided with a limiting groove, and one end of the spring is arranged in the limiting groove.

4. The multi-layer gravel packing column sliding sleeve opening and closing tool as claimed in claim 3, characterized in that: The number of the limiting grooves is two, and the two limiting grooves are symmetrically arranged on both sides of the clamping groove.

5. The multi-layer gravel packing column sliding sleeve opening and closing tool as claimed in claim 1, characterized in that: The first joint is a tubular member, and a first end of the first joint is provided with an internal thread, and a second end of the first joint is connected to the second joint.

6. The multi-layer gravel packing column sliding sleeve opening and closing tool as claimed in claim 5, characterized in that: The second joint is a tubular member, and the first end of the second joint is threadedly connected to the outside of the second end of the first joint, and the second end of the second joint is provided with an external thread.

7. The multi-layer gravel packing column sliding sleeve opening and closing tool as claimed in claim 1, characterized in that: There are multiple locking members, and the multiple locking members are arranged at intervals on the outer circumferential surface of the first joint.

8. A packing column assembly, characterized in that: include: An outer pipe string, a sliding sleeve, and a multi-layer gravel packing pipe string sliding sleeve opening and closing tool as claimed in any one of claims 1 to 7; The outer pipe column is provided with an expanded diameter section, the expanded diameter section is provided with a filling window, the sliding sleeve is slidably arranged inside the expanded diameter section, and the sliding stroke of the sliding sleeve covers the filling window to realize the opening and closing of the filling window; The sliding sleeve is provided with a boss, and in the axial direction of the first joint, the thickness of the boss is smaller than the width of the clamping groove; After the sliding sleeve opens or closes the filling window to a preset opening, the second guide bevel or the first guide bevel correspondingly presses against the end of the expanded diameter section, so that in the process of continuing to open or close the filling window, the locking piece gradually moves away from the sliding sleeve until the boss disengages from the snap-in groove after the filling window is opened or closed in place.

9. The packed column assembly according to claim 8, characterized in that: include: Both ends of the expanded diameter section are connected to the main body of the outer pipe column through a first connecting inclined surface and a second connecting inclined surface respectively.

10. The packed column assembly according to claim 8, characterized in that: The sliding sleeve is a cylindrical part, and the boss is an annular boss arranged on the inner wall of the sliding sleeve.

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