Universal connecting device for drilling fluid manifold

Abstract

The utility model discloses a universal connecting device for a drilling fluid manifold, which is characterized in that an upper flange is connected with an upper shell and an upper cushion block in a welding way from top to bottom, an upper sealing plate and a sealing ring are arranged in the upper shell, an upper mudguard tightly presses an upper ball joint through a bolt, the upper ball joint is in threaded connection with a lower joint, the sealing ring is arranged on the upper ball joint, and the sealing ring is arranged on the lower ball joint. A lower ball joint is installed in a lower shell, a lower flange is arranged downwards to be sequentially connected with the lower shell and a lower cushion block in a welded mode, then a lower sealing plate is arranged downwards, a sealing ring is installed on the lower sealing plate, the lower shell and a lower mud guard are pressed tightly through bolts, and a lower mud guard is arranged on the lower mud guard. Compared with traditional connection, the device has the advantages that on-site matched welding and matched manufacturing are avoided, mechanical stress is avoided, the installation process is simplified, the repair and matched machining cost is reduced, and the assembly efficiency is effectively improved.

Description

Technical Field

[0001] This utility model patent belongs to the field of oil and gas drilling engineering, and specifically relates to a universal connection device for a drilling fluid manifold. Background Art

[0002] The drilling fluid manifold is an important component of the drilling system. It is an important fluid transmission medium connecting the drilling pump and the drill pipe. Due to its many functional requirements, the manifold matching and structure are complex and diverse, often including various types of tees, crosses, elbows and various valves.

[0003] During on-site drilling fluid manifold assembly, the diverse nature of the entire manifold system presents multiple installation challenges. The most obvious is improper spacing or angles between pre-assembled manifold components, ultimately rendering them impossible to install and requiring repair or scrapping.

[0004] The main reason for this is the accumulation of manufacturing errors during the installation process. Over-positioning during assembly makes the final manifold connection extremely difficult. Common methods used on-site include on-site welding, cutting and re-welding, and on-site heating and bending. However, these methods require a large amount of rework, lack aesthetic appeal after secondary repairs, and are difficult to control and difficult to repair. To address this issue, we propose a universal connection device for drilling fluid manifolds to address the pain points of on-site manifold installation. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned problems existing in the prior art and provide a universal connection device for drilling fluid manifolds. The utility model can easily and conveniently connect the final two pipe string interfaces, and can compensate for the angle error, distance error, direction error, etc. between the connection manifolds. The installation between the manifolds will not generate stress, and the two manifolds can be quickly connected regardless of the error, avoiding the problem of secondary disassembly and assembly. The utility model significantly reduces the workload and work intensity of the staff, shortens the installation operation cycle, and saves the cost of the operators.

[0006] This utility model provides a universal connection device for drilling fluid manifolds used in casing drilling operations. It utilizes a universal slipknot structure, offering adjustable length and angle over a wide range to compensate for various manufacturing dimensional errors. After installation, it eliminates mechanical stress and can withstand the 52 MPa manifold pressure typically encountered in conventional drilling operations.

[0007] The technical solution adopted by the present invention is a universal connection device for a drilling fluid manifold. When a rigid manifold fixed at both ends needs to be connected, the universal connection device is installed to effectively ensure the smooth connection of the two manifolds. After the connection, the manifolds are beautiful and reliable, and there is no installation stress. A universal connection device for a drilling fluid manifold, the structure of which mainly includes: the upper flange at the top is welded to the upper shell, the upper pad is welded inside the upper shell, an upper sealing plate is installed inside the upper shell, an upper sealing ring is installed on the upper sealing plate, the upper sealing plate is pushed into the upper shell by the upper ball joint, the upper ball joint is pressed by the upper fender, and is tightened with bolt a. The upper ball joint is connected to the lower joint by threads, and a groove and a sealing ring are provided on the upper ball joint. The lower ball joint is installed in the lower shell, the lower flange at the bottom is welded to the lower shell, a lower pad is welded inside the lower shell, a lower sealing plate is installed on the lower pad, and the lower sealing plate is sealed by the sealing ring installed on the lower sealing plate and the spherical surface. A lower fender is installed on the lower shell and tightened with bolt b7. A lower fender ring is provided on the lower fender. When the lower fender is matched with the lower ball joint, the lower fender ring acts as a mud barrier. There are standard flange holes on the upper and lower flanges to connect with the corresponding manifolds.

[0008] The utility model is also characterized in that:

[0009] A universal connection device for drilling fluid manifolds. The upper and lower flanges utilize standard flange designs and mate with the flanges on the manifold. During manifold installation, if the two flanges are not coplanar, the upper or lower ball joint can be rotated within its housing to meet installation requirements. If the distance between the two flanges on the manifold is too long or too short, the threads between the upper and lower ball joints can be tightened or loosened to ensure the connection between the two ends of the manifold.

[0010] After the drilling fluid manifold universal connection device is installed, the central fluid can pass smoothly from the center of the connection device and can pass the maximum drilling fluid pressure of 52MPa. A sealing ring that can seal high pressure is provided between the threaded connections of the upper and lower ball joints, effectively ensuring the safety and reliability of the drilling fluid manifold after connection.

[0011] The beneficial effects of the utility model are:

[0012] The utility model discloses a universal connection device for a drilling fluid manifold, which does not require on-site welding and matching during installation, thereby avoiding the problem of large connection errors at the final interface of on-site hard pipe manifold assembly. After the universal connection device is installed, there is no mechanical stress between the manifolds, thus avoiding the procedures of rework and matching processing, and greatly reducing production costs.

[0013] The utility model discloses a universal connection device for a drilling fluid manifold, which solves the problem of difficult assembly of a hard manifold. It adopts a structure with adjustable length and angle, which can reduce the manufacturing precision between the manifolds and reduce the processing cost. After the manifolds are installed and adjusted, bolts a and bolt b are tightened to lock the upper and lower ball joints. The entire installation process is simple, and multiple seals effectively ensure the reliable connection of the manifold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural schematic diagram of a universal connection device for a drilling fluid manifold.

[0015] In the figure, 1. upper flange, 2. upper shell, 3. upper fender, 4. bolt a, 5. upper ball joint, 6. lower ball joint, 7. bolt b, 8. lower fender, 9. lower shell, 10. lower flange, 11. lower gasket, 12. lower sealing ring, 13. lower sealing plate, 14. lower fender ring, 15. axial sealing ring, 16. upper fender ring, 17. upper sealing plate, 18. upper sealing ring, 19. upper gasket. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] The utility model discloses a universal connection device for a drilling fluid manifold, the structure of which is as follows Figure 1 As shown, it mainly includes: the upper flange 1 at the top is welded to the upper shell 2, the upper pad 19 is welded inside the upper shell 2, the upper sealing plate 17 is installed in the upper shell 2, and the upper sealing plate 17 is installed on the upper sealing ring 18. The upper sealing plate 17 is pressed against the upper shell 2 by the upper ball joint 5. The upper fender 3 presses the upper ball joint 5 and is tightened with bolts a4. The upper ball joint 5 is threadedly connected to the lower ball joint 6. The upper ball joint 5 is provided with a groove and a sealing ring 15. The lower ball joint 6 is installed in the lower shell 9, and the lower flange 8 at the bottom is welded to the lower shell 9. The lower pad 10 is welded inside the lower shell 9, and the lower pad 10 is installed on the lower sealing plate 13. The lower sealing plate 13 is sealed with the sealing ring 12 installed on it. A lower fender 8 is installed on the lower shell 9 and tightened with bolts b7. A lower fender ring 14 is provided on the lower fender 8. When the lower fender 8 is matched with the lower ball joint 6, the lower fender ring 14 acts as a mud barrier. Standard flange holes are provided on the upper flange 1 and the lower flange 10 to connect with the corresponding manifolds.

[0018] The present invention is implemented as follows: after the drilling fluid manifold is installed using a universal connection device, when the manifold is connected, the upper flange 1 and the lower flange 10 are connected to the two ends of the manifold. First, the bolts a4 and b7 are loosened, and the flange positions are fully adjusted to ensure that the upper and lower flanges are aligned. If the distance is not appropriate, the connection distance is adjusted by tightening and loosening the upper ball joint 5 and the lower ball joint 6. By adjusting the angle and distance, the upper flange 1 and the lower flange 10 at both ends are finally connected to the manifold smoothly without generating installation stress. After the flanges at both ends of the manifold are tightened, the bolts a4 on the upper fender 3 and the bolts b7 on the lower fender 8 are tightened to achieve a reliable connection between the manifolds.

Claims

1. A universal connection device for a drilling fluid manifold, wherein the upper flange (1) at the top is welded to the upper shell (2), an upper pad (19) is welded inside the upper shell (2), an upper sealing plate (17) is installed inside the upper shell (2), an upper sealing ring (18) is installed on the upper sealing plate (17), the upper sealing plate (17) is pressed against the upper shell (2) by an upper ball joint (5), the upper fender (3) presses the upper ball joint (5), and is tightened with a bolt a (4), the upper ball joint (5) and the lower ball joint (6) are connected by threads, a groove and a sealing ring (15) are provided on the upper ball joint (5), and the lower ball joint (6) is installed in the lower shell (9), the lower flange (10) at the lower part is welded to the lower shell (9), a lower pad (11) is welded inside the lower shell (9), a lower sealing plate (13) is installed on the lower pad (11), and the lower sealing plate (13) is sealed with the spherical surface by the sealing ring (12) installed on itself. A lower mud guard (8) is installed on the lower shell (9) and is tightened with bolts b (7). A lower mud guard ring (14) is provided on the lower mud guard (8). When the lower mud guard (8) is matched with the lower ball joint (6), the lower mud guard ring (14) plays a mud guard role. Standard flange holes are provided on the upper flange (1) and the lower flange (10) to connect with the corresponding manifolds.

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