Wellhead falling object prevention device for petroleum drilling engineering

Abstract

The utility model relates to the technical field of petroleum drilling engineering, in particular to a wellhead falling object preventing device for petroleum drilling engineering, which comprises a drilling opening, a wellhead connecting pipe is movably arranged at the upper end of the drilling opening, and a circular truncated cone type drilling cover is arranged at the upper end opening of the wellhead connecting pipe. The circular-truncated-cone-shaped well drilling cover is inverted, the lower portion of the circular-truncated-cone-shaped well drilling cover is inserted into the well mouth connecting pipe, and a lifting driving mechanism for driving the circular-truncated-cone-shaped well drilling cover to ascend and descend is arranged on the outer side of the well mouth connecting pipe. The circular truncated cone type well drilling cover is arranged at the upper end opening of the well mouth connecting pipe and is inverted, so that the upper end opening of the well mouth connecting pipe can be blocked by the circular truncated cone type well drilling cover, falling objects can be effectively blocked, fine particles can be blocked, and the well drilling efficiency is improved. And the circular-truncated-cone-shaped well drilling cover is circular-truncated-cone-shaped and can adapt to well drilling openings with different diameters. The circular-truncated-cone-shaped well drilling cover is driven to ascend and descend through the lifting driving mechanism, so that the upper end opening of the well mouth connecting pipe can be opened or closed, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling engineering technology, and more specifically, to a wellhead anti-falling object device for oil drilling engineering. Background Technology

[0002] Oil drilling engineering is a systematic project that uses oil drilling equipment to drill through multiple formations along a designed trajectory from the surface to the predetermined target layer (oil and gas layer or potential oil and gas layer), forming a stable channel (i.e., oil and gas well) for the extraction or injection of the required fluids (water, gas, steam). During and after drilling, core sampling, logging, well logging and testing are carried out to obtain various information required for exploration, development and drilling.

[0003] Utility model patent CN221973467U discloses a wellhead anti-falling object device for oil drilling engineering, including a wellhead, a wellhead connecting pipe movably installed at the upper end of the wellhead, two sets of circular grooves penetrating the inner wall of the wellhead connecting pipe, a circular ring fixedly installed on the inner wall of the wellhead connecting pipe, and a strainer plate fixedly installed on the inner wall of the wellhead connecting pipe, the strainer plate being located below the circular ring, two sets of slots penetrating the inner wall of the circular ring, a soft block movably installed inside the circular ring, downward through grooves opened on both sides of the soft block, a first L-shaped rod fixedly installed at one end of the soft block, and a second soft L-shaped rod fixedly installed at the other end of the soft block. Through the design of the soft block, the first semi-circular baffle and the second semi-circular baffle, falling objects can be easily blocked at the wellhead, solving the problem of the inconvenience of blocking falling objects at the wellhead. However, its shortcomings are that it cannot be applied to wellheads of different diameters, and secondly, some fine particles will still fall off the sifted screen, thus affecting the oil extraction effect. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] A wellhead anti-falling object device for oil drilling engineering includes a wellhead, a wellhead connecting pipe movably disposed at the upper end of the wellhead, a frustum-shaped well cover disposed at the upper end of the wellhead connecting pipe, the frustum-shaped well cover being inverted and its lower part inserted into the wellhead connecting pipe, and a lifting drive mechanism for driving the frustum-shaped well cover to rise and fall is disposed on the outside of the wellhead connecting pipe.

[0006] Furthermore, the lifting drive mechanism includes a crossbar, a vertical sleeve, a winding wheel, and a connecting rope. The crossbar is horizontally fixed to the opposite sides of the frustum-shaped well cover. The vertical sleeve is fixed to the outside of the wellhead connecting pipe. The upper end of the vertical sleeve is open and the lower part has a through hole. The winding wheel is rotatably disposed on the outside of the wellhead connecting pipe. One end of the connecting rope is connected to the crossbar, and the other end passes through the upper end of the vertical sleeve and the through hole and is wound around the winding wheel.

[0007] Furthermore, the lifting drive device also includes a drive pulley, a driven pulley, a transmission belt, and a motor. The winding pulley is connected to a rotating shaft, the driven pulley is fixedly sleeved on the rotating shaft, the transmission belt is connected to the drive pulley and the driven pulley, and the drive pulley is fixed on the output shaft of the motor.

[0008] Furthermore, a clamp is provided on the outside of the wellhead connecting pipe, the rotating shaft is rotatably connected to the clamp, and the lower end of the vertical sleeve is connected to the clamp.

[0009] Furthermore, an L-shaped plate is fixedly connected to the bottom surface of the clamp, and the motor is mounted on the L-shaped plate.

[0010] Furthermore, the frustum-shaped well cover includes two symmetrically spliced ​​semi-frustum-shaped cover bodies. Both sides of the two semi-frustum-shaped cover bodies are provided with horizontal bars. Each horizontal bar is provided with a vertical sleeve and a connecting rope. Two winding wheels are provided on the rotating shaft. The connecting rope is wound on the two winding wheels respectively and the winding direction is the same.

[0011] Furthermore, a connecting ring is fixed to one end of the connecting rope near the crossbar. The crossbar is a screw rod, and the connecting ring is movably sleeved on the crossbar with nuts on both sides.

[0012] Furthermore, a connector is provided on the top surface of the semi-circular frustum-shaped cover, which can selectively connect two of the semi-circular frustum-shaped covers.

[0013] Furthermore, the clamp includes two semi-circular ring plates, with connecting plates on both sides of the semi-circular ring plates, and the connecting plates between the two semi-circular ring plates are connected by bolts.

[0014] Furthermore, a horizontal plate is provided on the outer side of the semi-circular ring plate, and the lower end of the vertical sleeve is detachably connected to the horizontal plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model discloses a wellhead anti-falling object device for oil drilling engineering. A frustum-shaped drill cover is installed at the upper end of the wellhead connecting pipe, and this frustum-shaped drill cover is inverted, thus sealing the upper end of the wellhead connecting pipe and effectively blocking falling objects, including fine particles. Furthermore, the frustum-shaped drill cover can accommodate wellheads of different diameters. A lifting drive mechanism moves the frustum-shaped drill cover up and down, allowing the upper end of the wellhead connecting pipe to be opened or closed for ease of use. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the wellhead anti-falling object device for oil drilling engineering in this utility model.

[0019] Figure 2 This is a side view of the wellhead anti-falling object device for oil drilling engineering in this utility model.

[0020] Figure 3 This is a partial structural schematic diagram of the wellhead anti-falling object device for oil drilling engineering in this utility model.

[0021] Figure 4 yes Figure 3 A schematic diagram of another state of the wellhead anti-falling object device used in oil drilling engineering.

[0022] In the diagram: 1. Drill head; 2. Wellhead connecting pipe; 3. Horizontal bar; 4. Vertical sleeve; 5. Winding reel; 6. Connecting rope; 7. Driving pulley; 8. Driven pulley; 9. Transmission belt; 10. Motor; 11. Rotating shaft; 12. L-shaped plate; 13. Semi-circular truncated cone cover; 14. Connecting ring; 15. Nut; 16. Connecting piece; 17. Semi-circular ring plate; 18. Connecting plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-4As shown, the wellhead anti-falling object device for oil drilling engineering in this embodiment includes a wellhead 1, a wellhead connecting pipe 2 is movably provided at the upper end of the wellhead 1, a frustum-shaped well cover is provided at the upper end of the wellhead connecting pipe 2, the frustum-shaped well cover is inverted and the lower part is inserted into the wellhead connecting pipe 2, and a lifting drive mechanism for driving the frustum-shaped well cover to rise and fall is provided on the outside of the wellhead connecting pipe 2.

[0025] In this embodiment, the frustum-shaped well cover includes two semi-frustum-shaped cover bodies 13, which are symmetrically arranged and spliced ​​together to form a frustum-shaped well cover.

[0026] The lifting drive mechanism includes a horizontal bar 3, a vertical sleeve 4, a winding reel 5, and a connecting rope 6. Two horizontal bars 3 are fixedly installed on the outer sides of each of the two semi-circular truncated cover bodies 13, with each horizontal bar 3 located at both ends of the splicing surface. The two horizontal bars 3 of each semi-circular truncated cover body 13 are collinear and parallel to each other. Each horizontal bar 3 is correspondingly equipped with a vertical sleeve 4, which is vertically fixed to the outer side of the wellhead connecting pipe 2. Two vertical sleeves 4 located on the same side of the truncated drill cover are respectively positioned on the outer side of the two horizontal bars 3. The upper end of the vertical sleeve 4 is open, and a through hole is provided on the lower part near the horizontal bar 3. Two winding reels 5 are coaxially rotatably mounted on the outer side of the wellhead connecting pipe 2, located below the two horizontal bars 3. One end of the connecting rope 6 is connected to the crossbar 3, and the other end passes through the upper end of the vertical sleeve 4 and the through hole and is wound onto the winding wheel 5. When the winding wheel 5 rotates, the connecting rope 6, which is connected to the crossbar 3 on the outside of the two semi-circular truncated covers 13 respectively, is wound or released at the same time, thereby driving the two semi-circular truncated covers 13 to rise or fall at the same time.

[0027] In this embodiment, the lifting drive device further includes a drive pulley 7, a driven pulley 8, a transmission belt 9, and a motor 10. A take-up pulley 5 is connected to a rotating shaft 11, and both take-up pulleys 5 are fixedly mounted on the same rotating shaft 11. The driven pulley 8 is also fixedly mounted on the rotating shaft 11. The transmission belt 9 is drive-connected to the drive pulley 7 and the driven pulley 8. The drive pulley 7 is fixed to the output shaft of the motor 10. Thus, the motor 10 drives the drive pulley 7 to rotate. Since the transmission belt 9 is drive-connected to the drive pulley 7 and the driven pulley 8, and the driven pulley 8 is fixed to the rotating shaft 11, it can drive the rotating shaft 11 and the take-up pulleys 5 to rotate together, thereby winding or releasing the connecting rope 6.

[0028] In this embodiment, a connecting ring 14 is fixed at one end of the connecting rope 6 near the crossbar 3. The crossbar 3 is a screw rod. The connecting ring 14 is movably sleeved on the crossbar 3, and nuts 15 are provided on both sides of the connecting ring 14. The nuts 15 are threadedly connected to the screw rod, so that the connecting rope 6 and the crossbar 3 can be detachably connected, so that the frustum-shaped well cover can be reused at wellheads 1 of different diameters.

[0029] In this embodiment, a clamp is provided on the outside of the wellhead connecting pipe 2, and the rotating shaft 11 is rotatably connected to the clamp. The lower end of the vertical sleeve 4 is connected to the clamp. Specifically, the clamp includes two semi-circular ring plates 17, and connecting plates 18 are provided on both sides of the semi-circular ring plates 17. The connecting plates 18 between the two semi-circular ring plates 17 are connected by bolts. The rotating shaft 11 is located on the outside of the clamp, and a bearing is connected to the end of the rotating shaft 11 near the clamp. The bearing is detachably installed on the outside of the semi-circular ring plate 17 by bolts. A horizontal plate is provided on the outside of the semi-circular ring plate 17, and the lower end of the vertical sleeve 4 is detachably connected to the horizontal plate by bolts. An L-shaped plate 12 is fixedly connected to the bottom surface of the semi-circular ring plate 17, and the motor 10 is installed on the L-shaped plate 12 by bolts. Thus, when adapting to wellheads 1 of different diameters, only the appropriate clamp needs to be replaced.

[0030] In this embodiment, a connector 16 is provided on the top surface of the semi-frustum-shaped cover, which can selectively connect two semi-frustum-shaped covers. Specifically, a buckle is provided on the top surface of one semi-frustum-shaped cover. The buckle has an L-shaped structure and one end is hinged to the top surface of the semi-frustum-shaped cover via a hinge. A groove is provided on the top surface of the other semi-frustum-shaped cover. The end of the buckle away from the hinge is inserted into the groove, thereby connecting the two semi-frustum-shaped covers to form a frustum-shaped drilling cover. When the frustum-shaped drilling cover is raised and detached from the wellhead connecting pipe 2, the buckle is rotated to disengage from the groove, and the connecting rope 6 is continued to be wound to separate the two semi-frustum-shaped drilling covers, exposing the opening above the wellhead connecting pipe 2, which facilitates oil drilling work below the wellhead 1.

[0031] The working principle of the wellhead anti-falling object device for oil drilling engineering in this embodiment is as follows:

[0032] By installing a frustum-shaped drill cover at the upper end of the wellhead connecting pipe 2, and inverting the frustum-shaped drill cover, the upper end of the wellhead connecting pipe 2 can be sealed, effectively blocking falling objects and fine particles. Furthermore, the frustum-shaped drill cover can accommodate wellheads 1 of different diameters. A lifting drive mechanism can raise or lower the frustum-shaped drill cover, thereby opening or closing the upper end of the wellhead connecting pipe 2 for ease of use.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wellhead anti-falling object device for oil drilling engineering, characterized in that, The wellhead (1) is provided with a wellhead connecting pipe (2) movably installed at the upper end of the wellhead (1). A frustum-shaped well cover is provided at the upper end of the wellhead connecting pipe (2). The frustum-shaped well cover is inverted and its lower part is inserted into the wellhead connecting pipe (2). A lifting drive mechanism for driving the frustum-shaped well cover to rise and fall is provided on the outside of the wellhead connecting pipe (2).

2. The wellhead anti-falling object device for oil drilling engineering according to claim 1, characterized in that, The lifting drive mechanism includes a horizontal bar (3), a vertical sleeve (4), a winding wheel (5), and a connecting rope (6). The horizontal bar (3) is horizontally fixed on both sides opposite to the frustum-shaped well cover. The vertical sleeve (4) is fixed to the outside of the wellhead connecting pipe (2). The upper end of the vertical sleeve (4) is open and the lower part has a through hole. The winding wheel (5) is rotatably set on the outside of the wellhead connecting pipe (2). One end of the connecting rope (6) is connected to the horizontal bar (3), and the other end passes through the upper end of the vertical sleeve (4) and the through hole and is wound on the winding wheel (5).

3. The wellhead anti-falling object device for oil drilling engineering according to claim 2, characterized in that, The lifting drive mechanism also includes a drive pulley (7), a driven pulley (8), a transmission belt (9), and a motor (10). The winding pulley (5) is connected to a rotating shaft (11). The driven pulley (8) is fixedly sleeved on the rotating shaft (11). The transmission belt (9) is connected to the drive pulley (7) and the driven pulley (8). The drive pulley (7) is fixed on the output shaft of the motor (10).

4. The wellhead anti-falling object device for oil drilling engineering according to claim 3, characterized in that, The wellhead connecting pipe (2) is provided with a clamp on the outside, the rotating shaft (11) is rotatably connected to the clamp, and the lower end of the vertical sleeve (4) is connected to the clamp.

5. The wellhead anti-falling object device for oil drilling engineering according to claim 4, characterized in that, An L-shaped plate (12) is fixedly connected to the bottom surface of the clamp, and the motor (10) is mounted on the L-shaped plate (12).

6. The wellhead anti-falling object device for oil drilling engineering according to claim 5, characterized in that, The frustum-shaped drilling cover includes two symmetrically spliced ​​semi-frustum-shaped cover bodies (13). A crossbar (3) is provided on both sides of the two semi-frustum-shaped cover bodies (13). Each crossbar (3) is provided with a vertical sleeve (4) and a connecting rope (6). Two winding wheels (5) are provided on the rotating shaft (11). The connecting rope (6) is wound on the two winding wheels (5) respectively and the winding direction is the same.

7. The wellhead anti-falling object device for oil drilling engineering according to claim 6, characterized in that, The connecting rope (6) is fixed with a connecting ring (14) at one end near the crossbar (3). The crossbar (3) is a screw rod. The connecting ring (14) is movably sleeved on the crossbar (3) and nuts (15) are provided on both sides.

8. The wellhead anti-falling object device for oil drilling engineering according to claim 7, characterized in that, The top surface of the semi-circular frustum-shaped cover (13) is provided with a connector (16), which can selectively connect two of the semi-circular frustum-shaped covers (13).

9. The wellhead anti-falling object device for oil drilling engineering according to claim 8, characterized in that, The clamp includes two semi-circular ring plates (17), and connecting plates (18) are provided on both sides of the semi-circular ring plates (17). The connecting plates (18) between the two semi-circular ring plates (17) are connected by bolts.

10. The wellhead anti-falling object device for oil drilling engineering according to claim 9, characterized in that, A horizontal plate is provided on the outside of the semi-circular ring plate (17), and the lower end of the vertical sleeve (4) is detachably connected to the horizontal plate.

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