An inner blowout preventer top drive plug

Abstract

The utility model belongs to top drive plug technology field discloses an inner blowout-preventor top drive plug, including valve body, valve seat, valve rod, valve core and rotation handle, the bottom of valve body is equipped with the closed base of integrated mould with valve body, forms fixed cavity in the inside of base, installs the anti -rotation mechanism in fixed cavity, and the anti -rotation mechanism includes magnetic column, locating post and the protruding piece of installing on locating post, still include: the locating iron block of embedding in the bottom of valve core, locating iron block is equipped with the recess and locating hole and mortise, when valve core rotates to the closed position, magnetic column inserts and magnetically attracts fixed in the mortise, locating post inserts in locating hole, protruding piece is clamped into recess, forms three -fold anti -rotation locking, the contact surface of valve body inner wall and the taper surface of valve core adopt taper cooperation. The utility model not only can effectively resist the impact of high pressure fluid to valve core, to ensure the absolute seal under the closed state, can also solve the problem that the fluid of sealing failure spouts caused by valve core accidental rotation.

Description

Technical Field

[0001] This utility model relates to the field of top-drive rotary valve technology, and in particular to an internal anti-spray top-drive rotary valve. Background Technology

[0002] The internal blowout preventer top drive rotary valve is a special safety valve device integrated into the top drive drilling system. It is usually installed between the top drive spindle and the drill string. Its function is to seal the internal passage of the drill string immediately in the event of a blowout or high-pressure fluid runaway by quickly closing the internal valve core, preventing drilling fluid or formation fluid from being ejected. It is a key component of well control equipment.

[0003] Chinese patent CN219529873U discloses an internal anti-spray top drive plug, including a valve body. Both sides of the outer surface of the valve body are provided with connecting plates for connection. A lower valve cover is fixedly installed on one side of the outer surface of the valve body. An upper valve cover is fixedly connected to the top surface of the lower valve cover. A connecting seat is fixedly installed on one side of the outer surface of the valve body. A fixing box is fixedly installed on the bottom surface of the connecting seat. The present invention relates to an internal anti-spray top-drive plug valve. In practical operation, when it is necessary to close the plug valve to block fluid flow, the threaded rod is rotated. As the threaded rod rotates, it drives the rotating plate to rotate inside the support sleeve. As the threaded rod rotates, it pushes the support plate upward. When the support plate rises, it drives the support rod and the locking block to rise. The locking block enters the connecting seat and inserts into the locking groove on the bottom surface of the valve core to restrict the valve core and prevent it from rotating. Thus, when the fluid impacts the valve core, the valve core will not rotate. However, in practical applications, it has been found that during normal operation of the top-drive plug valve, due to the presence of pressure, fluid leaks through the connection between the fixed box and the threaded rod. Therefore, we have proposed an internal anti-spray top-drive plug valve. Utility Model Content

[0004] In view of the problem that fluid leaks through the connection between the fixed box and the threaded rod during normal operation of the existing top drive cock due to pressure, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An internal anti-spray top-drive plug includes a valve body, a valve seat, a valve stem, a valve core, and a rotating handle. The bottom of the valve body is provided with a closed base integrally formed with the valve body. The interior of the base forms a fixed cavity, and an anti-rotation mechanism is installed in the fixed cavity. The anti-rotation mechanism includes a magnetic column, a positioning column, and a protrusion installed on the positioning column.

[0007] It also includes: a positioning iron block embedded in the bottom of the valve core. The positioning iron block has a plug hole, a positioning hole and a groove. When the valve core is rotated to the closed position, the magnetic column is inserted and magnetically fixed in the plug hole, the positioning column is inserted in the positioning hole, and the protrusion is stuck in the groove to form a triple anti-rotation lock.

[0008] As a technical solution of the internal anti-spray top drive plug of this utility model, the contact surface of the inner wall of the valve body and the conical surface of the valve core are taper-fitted, with a taper range of 1:5 to 1:10.

[0009] As a technical solution of the internal anti-spray top drive plug of this utility model, the magnetic column is coaxially arranged with the insertion hole, and the outer surface of the magnetic column is adapted to the inner cavity of the insertion hole.

[0010] As a technical solution of the internal anti-spray top drive plug of this utility model, the positioning post is coaxially arranged with the positioning hole, and the outer surface of the positioning post is adapted to the inner cavity of the positioning hole.

[0011] As a technical solution of the internal anti-spray top drive valve of this utility model, the protrusion is adapted to the groove, and the protrusion and the groove restrict the circumferential displacement of the valve core after they cooperate.

[0012] As a technical solution of the internal anti-spray top drive plug of this utility model, the magnetic column and the positioning column are asymmetrically distributed on the bottom wall of the fixed cavity, and the magnetic column is corresponding to the insertion hole and the positioning column is corresponding to the positioning hole.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] 1. This utility model, by setting an integrally formed and enclosed base with the valve body, avoids gaps when connecting with the valve body. Combined with a triple anti-locking mechanism, it can effectively resist the impact of high-pressure fluid on the valve core, ensuring absolute sealing in the closed state. At the same time, it can solve the problem of fluid ejection due to seal failure caused by accidental rotation of the valve core.

[0015] 2. This utility model enhances sealing durability by adopting a tapered fit design, and reduces assembly errors by combining asymmetrical distribution and precision-fitting components. It simplifies the overall structure and reduces maintenance costs, and is suitable for drilling operations under high-frequency and high-pressure conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0019] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Figure 4 This is a schematic diagram of the connection and assembly structure of the valve body, base, and anti-rotation mechanism of this utility model.

[0021] Figure 5 This is a schematic diagram of the connection and assembly structure of the valve core and the anti-rotation mechanism of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the diagram: 1. Valve body; 101. Contact surface; 2. Valve seat; 3. Valve stem; 4. Valve core; 401. Conical surface; 5. Rotating handle; 6. Base; 601. Fixed cavity; 701. Magnetic column; 702. Positioning column; 703. Protrusion; 704. Positioning block; 705. Insertion hole; 706. Positioning hole; 707. Groove. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-5 An internal anti-blowout top drive plug is provided. The internal anti-blowout top drive plug includes a valve body 1, a valve seat 2, a valve stem 3, a valve core 4, and a rotating handle 5. The bottom of the valve body 1 is provided with a closed base 6 integrally formed with the valve body 1. The interior of the base 6 forms a fixed cavity 601. An anti-rotation mechanism is installed in the fixed cavity 601. The anti-rotation mechanism includes a magnetic column 701, a positioning column 702, and a protrusion 703 installed on the positioning column 702.

[0026] It also includes: a positioning iron block 704 embedded in the bottom of the valve core 4. The positioning iron block 704 is made of low carbon steel and has a plug hole 705, a positioning hole 706, and a groove 707. When the valve core 4 rotates to the closed position, the magnetic column 701 is inserted and magnetically fixed in the plug hole 705, the positioning column 702 is inserted into the positioning hole 706, and the protrusion 703 is engaged in the groove 707, forming a triple anti-rotation locking. The positioning iron block 704 at the bottom of the valve core 4 is ferromagnetic, and the magnetic column 701 is a permanent magnet (neodymium iron boron). When the valve core 4 rotates to near the closed position, the magnetic column 701... A strong magnetic attraction is generated between the magnetic post 701 and the positioning iron block 704, which can actively pull the two closer. In application, after the magnetic post 701 is inserted into the insertion hole 705, it magnetically attracts the positioning iron block 704, providing initial fixing force and enhancing the stability of the valve core 4 in the closed position. The positioning post 702 is inserted into the positioning hole 706 to limit radial displacement. At the same time, the protrusion 703 is inserted into the groove 707 to prevent circumferential rotation, forming a double mechanical lock. The triple locking mechanism (magnetic attraction and double mechanical limit) can significantly improve the valve core 4's resistance to fluid impact, so as to solve the problem of fluid ejection due to sealing failure caused by accidental rotation of the valve core 4.

[0027] Reference Figures 2-5 The contact surface 101 of the inner wall of the valve body 1 and the conical surface 401 of the valve core 4 are taper-fitted, with a taper range of 1:5 to 1:10. In application, the contact surface 101 of the valve body 1 and the conical surface 401 of the valve core 4 are taper-fitted with a range of 1:5 to 1:10 to increase the sealing contact area, improve the sealing performance under high pressure, and at the same time reduce wear and extend service life.

[0028] Reference Figures 2-5 The magnetic post 701 is coaxially arranged with the insertion hole 705, and the outer surface of the magnetic post 701 is adapted to the inner cavity of the insertion hole 705. The positioning post 702 is coaxially arranged with the positioning hole 706, and the outer surface of the positioning post 702 is adapted to the inner cavity of the positioning hole 706. The protrusion 703 is adapted to the groove 707, and the protrusion 703 and the groove 707 restrict the 4-dimensional displacement of the valve core after they are engaged. In application, the magnetic post 701 and the insertion hole 705, the positioning post 702 and the positioning hole 706, and the protrusion 703 and the groove 707 are all designed with precision fit, which can ensure that the components fit tightly, eliminate the shaking caused by tolerance, and enhance the reliability of locking.

[0029] Reference Figures 2-5 The magnetic pillars 701 and positioning pillars 702 are asymmetrically distributed on the bottom wall of the fixed cavity 601, and the magnetic pillars 701 and the insertion holes 705 and the positioning pillars 702 and the positioning holes 706 are respectively set one-to-one. In application, the asymmetrical distribution of the magnetic pillars 701 and the positioning pillars 702 on the bottom wall of the fixed cavity 601 ensures a unique alignment direction during forced assembly, avoiding misassembly. At the same time, they correspond one-to-one with the insertion holes 705 and the positioning holes 706 at the bottom of the valve core 4 to improve its fault tolerance.

[0030] The working principle of this utility model is as follows: When the valve needs to be closed, the valve core 4 is rotated to the closed position by operating the rotating handle 5. At this time, the conical surface 401 of the valve core 4 is pressed against the contact surface 101 of the valve body 1 to form a preliminary seal. Then, after the valve core 4 is in place, the magnetic column 701 strongly attracts the positioning iron block 704, which can automatically insert the magnetic column 701 into the insertion hole 705. The positioning iron block 704 is attracted by magnetic force to prevent axial displacement. The positioning column 702 is simultaneously inserted into the positioning hole 706 to restrict the radial movement of the valve core 4. The protrusion 703 on the positioning column 702... The embedded groove 707 completely prevents the valve core 4 from rotating circumferentially, thus achieving triple locking triggering. When the valve needs to be opened, simply rotate the handle 5 in the opposite direction. At this time, the conical surface 401 of the valve core 4 disengages from the contact surface 101 of the valve body 1. The magnetic column 701, the positioning column 702, and the protrusion 703 disengage sequentially from the insertion hole 705, the positioning hole 706, and the groove 707 to release the lock. This effectively resists the impact of high-pressure fluid on the valve core 4, ensuring absolute sealing in the closed state. It also solves the problem of fluid ejection due to seal failure caused by accidental rotation of the valve core 4.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An internal anti-spray top-drive plug, comprising a valve body (1), a valve seat (2), a valve stem (3), a valve core (4), and a rotating handle (5), characterized in that: The bottom of the valve body (1) is provided with a closed base (6) integrally formed with the valve body (1). The interior of the base (6) forms a fixed cavity (601). An anti-rotation mechanism is installed in the fixed cavity (601). The anti-rotation mechanism includes a magnetic column (701), a positioning column (702), and a protrusion (703) installed on the positioning column (702). It also includes: a positioning iron block (704) embedded in the bottom of the valve core (4), the positioning iron block (704) having a plug hole (705), a positioning hole (706) and a groove (707), when the valve core (4) is rotated to the closed position, the magnetic column (701) is inserted and magnetically fixed in the plug hole (705), the positioning column (702) is inserted in the positioning hole (706), and the protrusion (703) is inserted into the groove (707) to form a triple anti-rotation lock.

2. The internal anti-spray top drive plug according to claim 1, characterized in that: The contact surface (101) of the inner wall of the valve body (1) and the conical surface (401) of the valve core (4) are taper-fitted, with a taper range of 1:5 to 1:

10.

3. The internal anti-spray top drive plug according to claim 1, characterized in that: The magnetic post (701) is coaxially arranged with the insertion hole (705), and the outer surface of the magnetic post (701) is adapted to the inner cavity of the insertion hole (705).

4. The internal anti-spray top drive plug according to claim 3, characterized in that: The positioning post (702) is coaxially arranged with the positioning hole (706), and the outer surface of the positioning post (702) is adapted to the inner cavity of the positioning hole (706).

5. The internal anti-spray top drive plug according to claim 1, characterized in that: The protrusion (703) is adapted to the groove (707), and the protrusion (703) and the groove (707) restrict the circumferential displacement of the valve core (4) after they are engaged.

6. The internal anti-spray top drive plug according to claim 4, characterized in that: The magnetic post (701) and the positioning post (702) are asymmetrically distributed on the bottom wall of the fixed cavity (601), and the magnetic post (701) is corresponding to the insertion hole (705), and the positioning post (702) is corresponding to the positioning hole (706).

Images