Novel annular blowout preventer

Abstract

The novel annular blowout preventer is applied to the technical field of blowout preventers and comprises an upper shell and a lower shell, threaded rods rotationally connected with the lower shell are arranged on the two sides of the bottom of the upper shell, and a motor matched with the threaded rods for use is bolted to one side of the bottom of the lower shell. The tops of the two threaded rods are in bolted connection with disc gears, the interior of the upper shell is rotationally connected with annular gears meshed with the disc gears, and the surfaces of the two threaded rods are in threaded connection with piston bodies slidably connected with the upper shell. The motor drives the threaded rod to rotate to be engaged with the piston body in a threaded mode, so that the piston body moves up and down in the blowout preventer. The rubber core can be normally extruded and held, and meanwhile the sealing performance between the rubber core and the blowout preventer does not need to be guaranteed. Even if a gap is generated by friction between the piston and the blowout preventer, the use of the blowout preventer cannot be influenced, and the replacement frequency of the piston is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of blowout preventers, particularly relates to a novel annular blowout preventer. BACKGROUND

[0002] When oil is exploited, the blowout preventer is needed to close the oil well, so as to prevent blowout accidents.

[0003] At present, the Chinese utility model with the announcement number CN212656796U discloses a novel annular blowout preventer. The existing blowout preventer generally adopts hydraulic mode to push the piston to move upwards. The rubber core is extruded and compressed to the well center under the action force of the piston inner taper surface, and the drilling tool is embraced or the well mouth is closed. However, this mode needs to ensure the sealing property of the piston and the inner surface of the blowout preventer shell, so as to avoid the hydraulic oil seepage. However, in long-term use, the piston slides up and down in the blowout preventer shell and is rubbed with each other, which causes certain abrasion, so as to reduce the sealing property. Therefore, the piston needs to be replaced regularly, and it is relatively troublesome to actually use. At the same time, in order to facilitate the drilling tool to penetrate into the blowout preventer, the inner hole of the blowout preventer is often larger than the drilling tool by several circles. This makes the drilling tool easy to move to the edge when penetrating into the blowout preventer, and thus it is difficult to keep at the center position of the inner hole of the blowout preventer, so as to cause the position deviation of the drilling tool. UTILITY MODEL CONTENTS

[0004] The utility model discloses a novel annular blowout preventer, which has the advantages that the piston can move up and down to make the rubber core seal and tightly embrace the drilling tool, the piston replacement frequency is reduced, and the drilling tool penetrating into the blowout preventer can be positioned at the center position.

[0005] The above technical purpose of the utility model is realized through the following technical scheme: a novel annular blowout preventer, including upper shell body and lower shell body, both sides of the bottom of the upper shell body are provided with the threaded rod rotationally connected with the lower shell body, one side of the bottom of the lower shell body is bolted with the motor used in cooperation with the threaded rod, the top of two threaded rods is bolted with the disc gear, the inside of the upper shell body is rotationally connected with the ring gear meshed with the disc gear, the surface of two threaded rods is threadedly connected with the piston body slidingly connected with the upper shell body, the upper shell body and the lower shell body are slidingly connected with the elastic rubber core used in cooperation with the piston body.

[0006] Adopting the technical scheme, the threaded rod is driven to rotate by the motor, and the piston body is engaged with the threaded rod, so that the piston body moves up and down inside the blowout preventer. Not only can the rubber core be normally squeezed and clamped, but also the sealing between the piston and the blowout preventer does not need to be ensured. Even if a gap is generated between the piston and the blowout preventer due to friction, the use of the blowout preventer is not affected, and the replacement frequency of the piston is reduced. The trapezoidal abutting blocks are abutted to the surface of the drill rod by the elastic force of the spring, so that the two trapezoidal abutting blocks can assist in supporting the drill rod to keep the center position inside the inner hole when the drill rod penetrates into the blowout preventer. In this way, the drill rod is not easy to move to the edge, and the risk of drill position deviation is reduced.

[0007] The utility model further sets up: the inside of upper shell and lower shell all is equipped with inner hole, the inner hole is equipped with the drill rod in the whole, the elastic rubber core is equipped in the surface of drill rod.

[0008] Adopting the technical scheme, the liquid drilled by the drill can be discharged outward through the gap between the drill rod and the inner hole.

[0009] The utility model further sets up: the both sides of upper shell inside all are connected with spring, two spring mutual approach one end all are connected with trapezoidal abutting block of cooperation use of drill rod, trapezoidal abutting block is connected with telescopic link of same upper shell fixed connection away from drill rod one end, the spring is equipped in the surface of telescopic link.

[0010] Adopting the technical scheme, the two trapezoidal abutting blocks can assist in supporting the drill rod to keep the center position inside the inner hole when the drill rod penetrates into the blowout preventer.

[0011] The utility model further sets up: the inside rotation of upper shell is connected with the ball of same annular gear inner surface sliding connection.

[0012] Adopting the technical scheme, the friction of the annular gear rotating inside the upper shell is reduced, and the rotation stability is improved.

[0013] The utility model further sets up: the upper shell and lower shell are all connected with mounting bolt between.

[0014] Adopting the technical scheme, the installation fastening is improved, and the upper shell and the lower shell are stably connected with each other.

[0015] The utility model further sets up: the top of upper shell and the bottom of lower shell are all welded with connecting flange.

[0016] Adopting the technical scheme, the blowout preventer can be conveniently installed on the oil exploitation pipeline, so that blowout protection is performed.

[0017] The trapezoidal resisting block is further provided with a sealing ring which is sleeved with the surface of the trapezoidal resisting block and is slidably connected with the upper shell.

[0018] By the technical scheme, the sealing property between the trapezoidal resisting block and the upper shell is improved, and liquid is prevented from penetrating into the inside of the upper shell.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. The threaded rod is driven to rotate by the motor and is engaged with the piston body, so that the piston body moves up and down in the blowout preventer. Not only can the rubber core be normally squeezed and held, but also the sealing property between the piston and the blowout preventer does not need to be ensured. Even if a gap is generated by the friction between the piston and the blowout preventer, the use of the blowout preventer is not affected, and the replacement frequency of the piston is reduced.

[0021] 2. The trapezoidal resisting blocks are pushed to adhere to the surface of the drill rod by the elastic force of the springs, so that the two trapezoidal resisting blocks can assist in supporting the drill rod to keep the center position of the inner hole when the drill rod penetrates into the blowout preventer. In this way, the drill rod is not easy to move to the edge, and the risk of position deviation of the drill is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the utility model;

[0023] Figure 2 is a structural sectional view of the utility model;

[0024] Figure 3 is an enlarged view of point A in the utility model; Figure 2

[0025] Figure 4 is a partial structural top view of the utility model.

[0026] Reference signs: 1, upper shell; 2, lower shell; 3, motor; 4, threaded rod; 5, disc gear; 6, ring gear; 7, piston body; 8, elastic rubber core; 9, drill rod; 10, inner hole; 11, spring; 12, trapezoidal resisting block; 13, telescopic rod; 14, ball; 15, mounting bolt; 16, connecting flange; 17, sealing ring. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings.

[0028] Example 1:

[0029] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 ​The utility model provides a new type annular blowout preventer, including upper casing 1 and lower casing 2, both sides of upper casing 1 bottom are provided with the threaded rod 4 of rotation connection with lower casing 2, one side of lower casing 2 bottom is bolted with the motor 3 of threaded rod 4 cooperation and use of motor 3, the top of two threaded rods 4 is bolted with disc gear 5, the inside rotation of upper casing 1 is connected with the ring gear 6 of meshing with disc gear 5, the surface of two threaded rods 4 is all screw thread connection with the piston body 7 of sliding connection with upper casing 1, and the sliding connection of upper casing 1 and lower casing 2 is with the elastic rubber core 8 of piston body 7 cooperation and use. Through motor 3 drive threaded rod 4 rotation and piston body 7 screw thread bite, make piston body 7 move up and down in blowout preventer inside. Not only can normal to rubber core extrude hold tightly, also need not guarantee the leakproofness between with blowout preventer. Even if the gap of piston and blowout preventer friction, will not cause the influence to the use of blowout preventer, reduces the replacement frequency of piston.

[0030] Reference Figure 1 、 Figure 2 The inside of upper casing 1 and lower casing 2 is provided with an inner hole 10, and a drilling tool rod 9 is arranged through the inner hole 10. The elastic rubber core 8 is sleeved on the surface of the drilling tool rod 9. The liquid drilled by the drilling tool can be discharged outward through the gap between the drilling tool rod 9 and the inner hole 10.

[0031] Reference Figure 3 A ball 14 is rotatably connected to the inner surface of the ring gear 6 in the inside of the upper casing 1. The friction of the ring gear 6 rotating in the inside of the upper casing 1 is reduced, and the rotation stability is improved.

[0032] Reference Figure 1 、 Figure 2 A mounting bolt 15 is threadedly connected between the upper casing 1 and the lower casing 2. The mounting fastening is improved, and the upper casing 1 and the lower casing 2 are stably connected to each other.

[0033] The use process is briefly described as follows: the threaded rod 4 is rotated by starting the motor 3, and then the two threaded rods 4 are driven to rotate in the same direction in the inside of the upper casing 1 and the lower casing 2 by the mutual meshing of the disc gear 5 and the ring gear 6. Then, the two piston bodies 7 are simultaneously moved up and down by the screw thread bite of the threaded rod 4 and the piston body 7. When the piston body 7 moves upward, the elastic rubber core 8 is pushed downward to the well center and extruded and compressed by the action force of the inner tapered surface of the piston body 7, so as to enclose the surface of the drilling tool rod 9 and seal the inside of the upper casing 1 to prevent blowout. When the piston body 7 moves downward, the extrusion force on the elastic rubber core 8 is cancelled, so that the elastic rubber core 8 can be reset by the self-resilience, and then the inner holes 10 of the upper casing 1 and the lower casing 2 are connected.

[0034] Example 2:

[0035] Reference Figure 1 ,Figure 2 、 Figure 3 A new type of annular blowout preventer, the upper shell 1 inside both sides are bolted with spring 11, two spring 11 close to each other one end are bolted with the same drill rod 9 cooperation using trapezoidal block 12, trapezoidal block 12 away from the drill rod 9 one end bolted with the same upper shell 1 fixed connection telescopic rod 13, spring 11 set in the surface of telescopic rod 13. By using the spring 11 of elastic force to push trapezoidal block 12 adhere to the surface of drill rod 9, so that two trapezoidal block 12 can be in the drill rod 9 into the inside of the blowout preventer, auxiliary support drill rod 9 keep the center position inside the hole 10. So that the drill rod 9 is not easy to move to the edge, reduce the risk of drilling position offset.

[0036] Reference Figure 1 、 Figure 2 The top of the upper shell 1 and the bottom of the lower shell 2 are welded with connecting flange 16. It is convenient to install the blowout preventer on the oil exploitation pipeline, so as to prevent the blowout protection.

[0037] Reference Figure 3 The surface of the trapezoidal block 12 is fixedly sleeved with the sealing ring 17 which is slidably connected with the upper shell 1. The sealing property between the trapezoidal block 12 and the upper shell 1 is improved, and the liquid is prevented from penetrating into the inside of the upper shell 1.

[0038] The use process is briefly described as follows: when the drill rod 9 is inserted into the inside of the hole 10, the elastic force of the spring 11 drives the telescopic rod 13 to extend, so that the telescopic rod 13 pushes the trapezoidal block 12 to adhere to the surface of the drill rod 9, so that the two trapezoidal blocks 12 can support the drill rod 9 at the center position inside the hole 10. At the same time, when the drill rod 9 moves downward, the trapezoidal block 12 is retracted into the inside of the upper shell 1 by overcoming the elastic force of the spring 11, so that the trapezoidal block 12 does not affect the sliding of the drill rod 9 in the hole 10.

[0039] The specific embodiment is only an explanation of the utility model, which is not a limitation of the utility model. Those skilled in the art can make modifications without creative contribution according to the needs after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A new type of annular preventer comprising an upper housing (1) and a lower housing (2), characterized in that: Both sides of the bottom of the upper shell (1) are provided with threaded rods (4) rotatably connected with the lower shell (2), one side of the bottom of the lower shell (2) is bolted with a motor (3) used in cooperation with the threaded rod (4), the top of the two threaded rods (4) is bolted with a disc gear (5), the inside of the upper shell (1) is rotatably connected with an annular gear (6) engaged with the disc gear (5), the surface of the two threaded rods (4) is threadedly connected with a piston body (7) slidingly connected with the upper shell (1), the upper shell (1) and the lower shell (2) are slidingly connected with an elastic rubber core (8) used in cooperation with the piston body (7).

2. A new type of annular preventer according to claim 1, characterized in that: The inside of the upper shell (1) and the lower shell (2) is provided with an inner hole (10), the inside of the inner hole (10) is provided with a drilling rod (9), the elastic rubber core (8) is sleeved on the surface of the drilling rod (9).

3. A new type of annular preventer according to claim 2, characterized in that: Both sides of the inside of the upper shell (1) are bolted with springs (11), one end of the two springs (11) close to each other is bolted with a trapezoidal stop block (12) used in cooperation with the drilling rod (9), one end of the trapezoidal stop block (12) away from the drilling rod (9) is bolted with a telescopic rod (13) fixedly connected with the upper shell (1), the spring (11) is sleeved on the surface of the telescopic rod (13).

4. A new type of annular preventer according to claim 1, characterized in that: The inside of the upper shell (1) is rotatably connected with a ball (14) slidingly connected with the inner surface of the annular gear (6).

5. A new type of annular preventer according to claim 1, characterized in that: The upper shell (1) and the lower shell (2) are threadedly connected with mounting bolts (15).

6. A new type of annular preventer according to claim 1, characterized in that: The top of the upper shell (1) and the bottom of the lower shell (2) are welded with connecting flanges (16).

7. A new type of annular preventer according to claim 3, characterized in that: The surface of the trapezoidal stop block (12) is fixedly sleeved with a sealing ring (17) slidingly connected with the upper shell (1).

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