Well wall stabilizing device for tight oil drilling

Abstract

The utility model discloses a well wall stabilizing device for tight oil well drilling, which comprises a reinforcing assembly, the reinforcing assembly comprises a protective frame, an air bag is arranged at one end of the protective frame, the air bag is provided with two groups of open holes, the open holes are respectively and symmetrically arranged on two sides of the air bag, and two groups of hydraulic telescopic rods are arranged on the outer wall of the protective frame. The two sets of hydraulic telescopic rods are fixed to the outer walls of the two sides of the protection frame respectively and are symmetrically arranged, fixing cones are installed at the telescopic ends of the hydraulic telescopic rods, the positions and the sizes of the fixing cones are matched with those of the open holes of the air bags, an air pump is arranged on the outer wall of the top of the protection frame, and a filter screen is detachably arranged at an air inlet of the air pump; a stabilizing assembly used for further reinforcing and improving the stability of the well wall and a limiting assembly used for preventing the device from moving are arranged on one side of the protection frame, the stabilizing assembly comprises two sets of connecting frames, and the two sets of connecting frames are fixedly and symmetrically installed on the outer wall of the bottom of the protection frame.

Description

Technical Field

[0001] This utility model relates to the field of tight oil extraction technology, and in particular to a wellbore stabilization device for tight oil drilling. Background Technology

[0002] Tight oil refers to oil accumulations formed in tight reservoirs sandwiched or adjacent to high-quality source oil formations without undergoing large-scale, long-distance migration. Tight oil extraction is achieved through a series of complex engineering technologies, mainly including horizontal well drilling and multi-stage fracturing. During well drilling, the wellbore is prone to damage or cracking, especially the upper part of the wellbore. Because the upper layer is relatively soft, the wellbore is more susceptible to damage. Moreover, the upper wellbore experiences greater friction and impact forces during drilling. Therefore, the upper wellbore requires extra reinforcement.

[0003] A search revealed Chinese patent application number 202323287666.3, which discloses a wellbore stabilization device, including a mud compensation box and a stabilization assembly. The stabilization assembly includes a sealing ring cover and a support ring plate. A wellbore-adaptive sleeve is fixedly connected to the bottom end of the support ring plate. The wellbore-adaptive sleeve contains multiple sequentially rotatably connected arc plate units. Each arc plate unit includes an integrally formed connecting arc plate and a connecting clamping plate. An assembly sleeve is integrally formed on the top of one side of the connecting arc plate, and an assembly support column is integrally formed on the bottom of the other side. A sleeve pin is welded to the top of the assembly support column. The sealing ring cover is fixedly installed on the top of the multiple connecting clamping plates. The wellbore stabilization device in the aforementioned patent has the following shortcomings: During use, the device does not include a reinforcement device to effectively reinforce the upper part of the wellbore. The upper part of the wellbore is relatively soft and easily damaged, making it extremely susceptible to collapse during drilling. Without a reinforcement device, the stability of the wellbore is severely affected, significantly impacting drilling efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wellbore stabilization device for tight oil drilling.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wellbore stabilization device for tight oil drilling includes a reinforcement component. The reinforcement component includes a protective frame, with an airbag installed at one end of the protective frame. The airbag has two sets of openings, symmetrically arranged on both sides of the airbag. Two sets of hydraulic telescopic rods are installed on the outer wall of the protective frame, fixed to the outer walls on both sides of the protective frame. The two sets of hydraulic telescopic rods are symmetrically arranged, and a fixing cone is installed at the telescopic end of each hydraulic telescopic rod. The position and size of the fixing cone are adapted to the openings of the airbag. An air pump is installed on the top outer wall of the protective frame. A filter screen is detachably installed at the air inlet of the air pump. The airbag is connected to the air pump. A stabilization component for further reinforcement and increasing wellbore stability and a limiting component for preventing displacement of the device are provided on one side of the protective frame.

[0007] As a further improvement of this utility model: the stabilizing component includes a connecting frame, and two sets of the connecting frame are respectively fixedly and symmetrically installed on the bottom outer wall of the protective frame. Several sets of springs are installed on one side of the connecting frame, and a pressure plate is installed on one end of the spring. The pressure plate has serrated protrusions evenly arranged on one side.

[0008] As a further embodiment of this utility model: the limiting component includes a fixing frame, and two sets of fixing frames are provided, which are respectively fixed to the top outer wall of the protective frame. A hydraulic lifting rod is provided on the top outer wall of the fixing frame. The telescopic end of the bottom of the hydraulic lifting rod can slide through the fixing frame. A limiting cone is installed at the bottom end of the hydraulic lifting rod. Two sets of limiting holes are opened on the top of the protective frame. The position and size of the limiting cone are adapted to the limiting holes.

[0009] As a further improvement of this utility model: the connecting frame is provided with multiple sets of openings, and a guide rod is slidably installed through the openings. The end of the guide rod is fixed to the pressure plate, and a limit block is provided at the tail end of the guide rod. The diameter of the limit block is larger than the diameter of the opening of the connecting frame.

[0010] As a further embodiment of this utility model: a support frame is fixedly installed on the top outer wall of the protective frame by bolts, a winding motor is fixedly installed on one side of the outer wall of the support frame by bolts, a drive shaft is connected to one side of the winding motor, one end of the drive shaft is rotatably installed through the support frame, and a winch is installed on the other end of the drive shaft.

[0011] As a further improvement of this utility model: a fixed bracket is fixedly installed on the top outer wall of the support frame by bolts, and a rain shield is installed on the top of the fixed bracket.

[0012] As a further improvement of this utility model: a lamp holder is fixed to the top outer wall of the protective frame by bolts, and a warning light is installed at the top of the lamp holder.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By starting the air pump, air is drawn into the airbag through the air inlet, causing it to expand. The inflated airbag inside the well comes into contact with the well wall and presses against the upper part of the well wall for fixation. The expansion of the airbag can compress the relatively soft upper part of the well wall, providing effective support through compression and fixation, thereby preventing the upper part of the well wall from collapsing during drilling. This effectively increases the stability of the well wall, facilitates drilling operations, and indirectly increases drilling efficiency.

[0015] 2. Controlled by the elastic force of multiple springs, the pressure plate moves towards the side closer to the well wall and contacts the well wall to press against it, further reinforcing the well wall and thus increasing its stability.

[0016] 3. The limit cone can be controlled to fall by the hydraulic lifting rod. The tip of the limit cone is inserted into the ground through the limit hole. The insertion of the limit cone into the ground can effectively limit the device and prevent unnecessary displacement of the device during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the wellbore stabilization device for tight oil drilling proposed in this utility model from a frontal perspective.

[0018] Figure 2 This is a schematic diagram of the reinforced part of a wellbore stabilization device for tight oil drilling proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the limiting part of a wellbore stabilization device for tight oil drilling proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the winding section of a wellbore stabilization device for tight oil drilling proposed in this utility model.

[0021] In the diagram: 1-protective frame, 2-airbag, 3-connecting frame, 4-guide rod, 5-spring, 6-pressure plate, 7-fixed cone, 8-hydraulic telescopic rod, 9-filter screen, 10-air pump, 11-lamp holder, 12-warning light, 13-support frame, 14-rain shield, 15-winch, 16-hydraulic lifting rod, 17-fixed frame, 18-limiting cone, 19-winding motor, 20-limiting hole, 21-drive shaft. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0023] The embodiments of this utility model 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 elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] Example 1

[0025] A wellbore stabilization device for tight oil drilling, such as Figure 1-4 As shown, the device includes a reinforcement assembly, which includes a protective frame 1. An airbag 2 is installed at one end of the protective frame 1. The airbag 2 has two sets of openings, which are symmetrically arranged on both sides of the airbag 2. A hydraulic telescopic rod 8 is fixed to the outer wall of the protective frame 1 by bolts. Two sets of hydraulic telescopic rods 8 are fixed to the outer wall of the protective frame 1 by bolts, and the two sets of hydraulic telescopic rods 8 are symmetrically arranged. A fixing cone 7 is installed at the telescopic end of the hydraulic telescopic rod 8. The position and size of the fixing cone 7 are adapted to the opening of the airbag 2. An air pump 10 is fixed to the top outer wall of the protective frame 1 by bolts. A filter screen 9 is detachably installed at the air inlet of the air pump 10. The airbag 2 is connected to the air pump 10. A stabilizing component for further reinforcement and increasing well wall stability and a limiting component for preventing device displacement are provided on one side of the protective frame 1.

[0026] When in use, the size of the protective frame 1 is adapted to the wellhead. The bottom of the protective frame 1 is provided with a hollow annular protrusion. When the protective frame 1 is installed at the wellhead, the protrusion at the bottom enters the well. The air pump 10 is started and air is drawn in through the air inlet and fed into the airbag 2, which can inflate it. The airbag 2 in the well is inflated and contacts the well wall, and can contact the upper part of the well wall for pressure and fixation. The inflation of the airbag 2 can squeeze the relatively soft upper part of the well wall to compact it. While compressing and fixing, it provides effective support, thereby avoiding the collapse of the upper part of the well wall during drilling and causing certain safety hazards. The hydraulic telescopic rod 8 can control the movement of the fixed cone 7 to insert into the well wall, which can limit the device and prevent shaking during use. The filter screen 9 can filter the air during intake to avoid the intake of foreign objects and blockage.

[0027] The stabilizing component includes a connecting frame 3, which is provided in two sets and is symmetrically installed on the bottom outer wall of the protective frame 1 by bolts. Several sets of springs 5 ​​are installed on one side of the connecting frame 3, and a pressure plate 6 is installed on one end of the springs 5. The pressure plate 6 has serrated protrusions evenly arranged on one side.

[0028] When in use, after the protective frame 1 is installed at the wellhead, the pressure plate 6 enters the well and is controlled by the elastic force of multiple sets of springs 5. The pressure plate 6 moves to the side closer to the well wall and contacts the well wall to press against it, further reinforcing the well wall and thus further increasing the stability of the well wall. The serrated protrusions of the pressure plate 6 can prevent unnecessary displacement of the pressure plate 6 during pressing and fixing.

[0029] The limiting component includes a fixing frame 17, which has two sets and is fixed to the top outer wall of the protective frame 1 by bolts. A hydraulic lifting rod 16 is fixed to the top outer wall of the fixing frame 17 by bolts. The telescopic end of the bottom of the hydraulic lifting rod 16 can slide through the fixing frame 17. A limiting cone 18 is installed at the bottom of the hydraulic lifting rod 16. Two sets of limiting holes 20 are opened on the top of the protective frame 1. The position and size of the limiting cone 18 are adapted to the limiting holes 20.

[0030] When in use, after the protective frame 1 is placed at the wellhead, the limit cone 18 can be controlled to fall by the hydraulic lifting rod 16. The tip of the limit cone 18 is inserted into the ground through the limit hole 20. The device can be effectively limited by the limit cone 18 being inserted into the ground, which can prevent unnecessary displacement of the device during use.

[0031] To prevent the pressure plate 6 from shifting during movement, such as Figure 1 , 2 As shown, the connecting frame 3 is provided with multiple sets of openings, and a guide rod 4 is slidably installed through the openings. The end of the guide rod 4 is fixed to the pressure plate 6, and a limit block is provided at the tail end of the guide rod 4. The diameter of the limit block is larger than the diameter of the opening of the connecting frame 3.

[0032] During use, the guide rod 4 can be restricted by the limit block to prevent it from coming off the connecting frame 3. When the spring 5 controls the movement of the pressure plate 6, the movement trajectory of the pressure plate 6 can be restricted by multiple sets of guide rods 4 to prevent the pressure plate 6 from deviating during movement.

[0033] To facilitate placement or recycling of equipment, such as Figure 1 , 3 As shown in Figure 4, a support frame 13 is fixedly installed on the top outer wall of the protective frame 1 by bolts. A winding motor 19 is fixedly installed on one side of the outer wall of the support frame 13 by bolts. A drive shaft 21 is connected to one side of the winding motor 19. One end of the drive shaft 21 is rotatably installed through the support frame 13. A winch 15 is installed on one end of the drive shaft 21.

[0034] In use, the steel cable can be wound up by the winch 15. A hook is set at the end of the steel cable. The steel cable can be extended and wound up by controlling the drive shaft 21 and the winch 15 to rotate forward or backward by the winding motor 19. This allows the hook to enter the well to put in or retrieve the required equipment, which can effectively increase efficiency.

[0035] To increase the service life of steel cables, such as Figure 4 As shown, a fixed bracket is fixedly installed on the top outer wall of the support frame 13 by bolts, and a rain shield 14 is installed on the top of the fixed bracket;

[0036] When in use, the size and position of the rain shield 14 are adapted to the winch 15. The rain shield 14 can cover the winch 15, thereby protecting it from rain and preventing the steel cable wound on the winch 15 from being corroded by rainwater, which will affect its service life and reduce unnecessary expenses.

[0037] Example 2

[0038] To enhance security, refer to Figure 1 A wellbore stabilization device for tight oil drilling. This embodiment makes the following improvements compared to embodiment 1: a lamp holder 11 is fixed to the top outer wall of the protective frame 1 by bolts, and a warning light 12 is installed at the top of the lamp holder 11.

[0039] When in use, the warning light 12 can flash to alert passing staff and prevent them from colliding with the device and getting injured in dark or other difficult-to-observe environments.

[0040] The above description is only a preferred embodiment of the present utility model. For parts that do not require creative effort in circuit control, signal control and transmission, please refer to the prior art. However, the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wellbore stabilizing device for compact oil drilling comprising a reinforcement assembly, characterized in that, The reinforcing assembly comprises a protective frame (1), one end of the protective frame (1) is provided with an air bag (2), the air bag (2) is provided with an opening, the opening is provided with two groups, which are symmetrically arranged on the two sides of the air bag (2), the outer wall of the protective frame (1) is provided with two groups of hydraulic telescopic rods (8), which are fixed on the outer walls of the two sides of the protective frame (1), the two groups of hydraulic telescopic rods (8) are symmetrically arranged, the telescopic end of the hydraulic telescopic rod (8) is provided with a fixing cone (7), the position and size of the fixing cone (7) are matched with the opening of the air bag (2), the top outer wall of the protective frame (1) is provided with an air pump (10), the air inlet of the air pump (10) is detachably provided with a filter screen (9), the air bag (2) is connected with the air pump (10), one side of the protective frame (1) is provided with a stabilizing assembly for further reinforcing and increasing the stability of the well wall and a limiting assembly for preventing displacement of the device.

2. A borehole wall stabilizing device for tight oil drilling according to claim 1, characterized in that, The stabilizing assembly comprises a connecting frame (3), the connecting frame (3) is provided with two groups, which are fixed and symmetrically arranged on the bottom outer wall of the protective frame (1), one side of the connecting frame (3) is provided with a plurality of groups of springs (5), one end of the spring (5) is provided with a pressing plate (6), one side of the pressing plate (6) is uniformly provided with a sawtooth-shaped protrusion.

3. A borehole wall stabilizing device for tight oil drilling as defined in claim 1, wherein, The limiting assembly comprises a fixing frame (17), the fixing frame (17) is provided with two groups, which are fixed on the top outer wall of the protective frame (1), the top outer wall of the fixing frame (17) is provided with a hydraulic lifting rod (16), the telescopic end of the bottom of the hydraulic lifting rod (16) can slide through the fixing frame (17), the bottom end of the hydraulic lifting rod (16) is provided with a limiting cone (18), two groups of limiting holes (20) are formed in the top of the protective frame (1), the position and size of the limiting cone (18) are matched with the limiting hole (20).

4. A borehole wall stabilizing device for tight oil drilling according to claim 2, characterized in that, The connecting frame (3) is provided with a plurality of groups of openings, a guide rod (4) is slidably arranged in the opening, the end of the guide rod (4) is fixed to the pressing plate (6), the tail end of the guide rod (4) is provided with a limiting block, and the diameter of the limiting block is greater than the diameter of the opening of the connecting frame (3).

5. A borehole wall stabilizing device for tight oil drilling as defined in claim 1 wherein, The top outer wall of the protective frame (1) is provided with a support frame (13) fixed by bolts, one side outer wall of the support frame (13) is provided with a winding motor (19) fixed by bolts, one side of the winding motor (19) is connected with a transmission shaft (21), one end of the transmission shaft (21) is rotatably arranged through the support frame (13), and one end of the transmission shaft (21) is provided with a winch (15).

6. A borehole wall stabilizing device for tight oil drilling according to claim 5, characterized in that The top outer wall of the support frame (13) is provided with a fixed support fixed by bolts, and the top end of the fixed support is provided with a rain shelter (14).

7. A borehole wall stabilizing device for tight oil drilling according to claim 1, wherein, The top outer wall of the protective frame (1) is provided with a lamp holder (11) fixed by bolts, and the top end of the lamp holder (11) is provided with a warning light (12).

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