CN103453278A - High-universality hydraulic press sealing head mechanism capable of quickly replacing lower sealing body assembly - Google Patents

Abstract

The invention discloses a hydraulic press sealing head mechanism with high universality and capable of quickly replacing a lower sealing body assembly. The pressure testing device has the advantages of strong universality, capability of testing pressure of workpieces with different pipe diameters, no damage to the workpieces, low cost and quick replacement.

Description

High versatility hydraulic press seal head mechanism that can quickly replace the lower seal body assembly

technical field

The invention relates to a sealing head of a high-pressure testing machine, in particular to a highly versatile sealing head mechanism of a hydraulic machine capable of quickly replacing a lower sealing body assembly.

Background technique

With the development of the machinery industry, some tubular tools (such as downhole tools of different specifications, steel pipes of different specifications) are widely used under high pressure, and the safety of these tools directly affects the production safety on site, so before applying It is necessary to carry out high-pressure test, and the current high-pressure test press is a tool with a sealing head corresponding to a pipe diameter, and a test press can only meet the pressure test workpieces with a few specifications of pipe diameters, which not only costs High, and the utilization rate of the equipment is low, and the versatility is not strong. In addition, the versatile pressure testing machine uses buckle plugs of different specifications at both ends and the workpiece to be screwed on for pressure testing, so that not only the buckle of the workpiece will be damaged during the pressure test, but also the workpiece must be properly tested. There are thread buckles at both ends, and there is no way to test the pressure without buckles.

Taking the pressure test of downhole tools in the petroleum industry as an example, due to the variety of downhole tools and complex structures, the diameters of different types of pipes also vary greatly. For example, there are hundreds of types of downhole tools produced by Chuanqing Drilling Downhole Operation Company, such as packers, spinners, ball catchers, sliding sleeves, etc., and one of them is called a floating hoop. There are dozens of types, with diameters ranging from 90mm to 400mm. If the universality of the pressure testing machine for so many types of downhole tools is not strong, not only the investment in the testing machine equipment will be high, but also the maintenance work of the equipment will be very high. It is also quite heavy. In addition, in order to reduce the cost of pressure testing, many downhole tool manufacturers usually use different pressure testing tools with different plugs (a kind of round cap with internal thread or external thread, which is connected with the outer surface of the pressure test workpiece before pressure test). thread or internal thread), although it is cheap and simple, it will cause damage to the threaded opening of the tool during the pressure test. Convenience, the two ends of the tool must be designed as buckle threads at the beginning of the design, regardless of whether the two ends of the downhole tool need a buckle in function, this will inevitably affect the normal design and use of the downhole tool.

In the prior art, the application number is the Chinese patent of 201020539016.7: the steel pipe end sealing ring of the steel pipe pressure test equipment and the Chinese patent of the application number 201020156402.8: the end seal of the high pressure hydraulic system of the steel pipe pressure test equipment, etc., these technologies all exist. The versatility of the pressure pipe diameter is not strong, and a set of equipment can only be used for the pressure test of a certain pipe diameter workpiece.

Contents of the invention

The purpose of the present invention is to provide a hydraulic press seal head mechanism with high versatility, which can be used for pressure testing of workpieces with different pipe diameters, without damage to the workpieces, low in cost, and can be replaced quickly.

The purpose of the present invention is achieved through the following technical solutions:

The high versatility of the present invention can quickly replace the hydraulic press sealing head mechanism of the lower sealing body assembly, including the protective cover, the upper part of the sealing head, the lower sealing body, and the sealing ring. The lower sealing body and the sealing ring are an integral assembly, and the whole Assemblies include a variety of sizes.

It can be seen from the above-mentioned technical solution provided by the present invention that the high versatility provided by the embodiment of the present invention can quickly replace the hydraulic press seal head mechanism of the lower sealing body assembly. Since the lower sealing body and the sealing ring are an integral assembly, the integral assembly includes A variety of specifications, strong versatility, pressure test for workpieces with different pipe diameters, no damage to workpieces, low cost, and quick replacement.

Description of drawings

Fig. 1 is a structural schematic diagram of a specification of the sealing head mechanism of a hydraulic press with high versatility and quick replacement of the lower sealing body assembly according to Embodiment 1 of the present invention;

Fig. 2 is a structural schematic diagram of another specification of the sealing head mechanism of the hydraulic press with high versatility and quick replacement of the lower sealing body assembly according to Embodiment 1 of the present invention;

Fig. 3 is a schematic structural view of the sealing head mechanism of the hydraulic press with high versatility and quick replacement of the lower sealing body assembly according to the second embodiment of the present invention.

In the picture:

1. Upper part of sealing head, 2. Protective cover, 3. Water inlet hole of sealing ring, 4. Lower sealing body, 5. Briquetting block, 6. Sealing ring, 7. Water inlet hole for pressure test, 8. Vent hole or drainage hole.

Detailed ways

The embodiments of the present invention will be further described in detail below.

The high versatility of the present invention can quickly replace the hydraulic press sealing head mechanism of the lower sealing body assembly, and its preferred specific implementation mode is:

It includes a protective cover, an upper part of a sealing head, a lower sealing body, and a sealing ring. The lower sealing body and the sealing ring are an integral assembly, and the entire assembly includes various specifications.

The upper part of the sealing head, the lower sealing body and the sealing ring are an integral assembly.

The protective cover is arranged on the upper part of the integral assembly, and a suspension ring is provided on one side of the integral assembly. The lower surface of the protective cover and the upper surface of the integral assembly are both planes without steps.

A pressure block is provided between the integral assembly and the upper part of the sealing head, and the protective cover is arranged on the side edge of the integral assembly and the upper part of the sealing head.

The side edge portion of the integral assembly and the upper part of the sealing head is a wedge-shaped structure, and the inner wall of the protective cover is a wedge-shaped groove engaged with the wedge-shaped structure.

The pressing block is arranged between the upper part of the sealing head and the sealing ring.

The high versatility of the present invention can quickly replace the hydraulic press sealing head mechanism of the lower sealing body assembly, has strong versatility, can perform pressure tests on workpieces with different pipe diameters, does not damage the workpieces, has low cost, and can be replaced quickly.

Specific embodiment one:

As shown in Figure 1 and Figure 2, the floating hoop (the structure is a one-way valve) is a component of two downhole tools with pipe diameters of 89mm and 400mm. In Figure 1, it is the sealing head of the 89mm floating hoop, and in Figure 2 The structure of the sealing head is 400mm floating hoop. After the pressure test is completed for a tool of one specification, if you need to test a tool of another specification, you only need to:

The first step is to open the protective cover 2;

The second step is to replace the lower sealing body assembly as a whole (including the overall assembly of the lower sealing body 4, the pressing block 5, and the sealing ring 6);

The third step is to close the protective cover 2.

The conversion of sealing heads with different specifications can be completed in three steps, and the cost of the equipment is low. Only a part of the equipment needs to be replaced, and the other overall equipment remains unchanged.

Specific embodiment two:

As shown in Figure 3, quick replacement is achieved according to the following steps:

The first step is to directly lift the sealing head core (including the overall assembly of the upper part of the sealing head 1, the lower sealing body 4 and the sealing ring 6) from the protective cover 2 through the lifting ring;

The second step is to replace the corresponding sealing head parts;

The third step is to put the sealing head core back.

Similarly, the conversion of sealing heads with different specifications can be completed in three steps, and the cost of the equipment is low, only part of the equipment needs to be replaced, and the other overall equipment remains unchanged.

The beneficial effects brought by the technical solution of the present invention:

Strong versatility, a set of equipment can be designed to be suitable for pressure testing of workpieces with different pipe diameters; fast replacement; low cost; no damage to workpieces; in specific embodiment 1, the inner wall of the protective cover and the shoulder of the sealing head are designed as a wedge-shaped structure Can play a very good locking effect.

In a specific implementation, the sealing head can be designed from a circular shape to a square shape or other shapes. When the shape of the protective cover changes, the shape of the sealing head core also changes.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (6)

1. A highly versatile hydraulic press seal head mechanism that can quickly replace the lower seal body assembly, including a protective cover, the upper part of the seal head, a lower seal body, and a seal ring, characterized in that the lower seal body and the seal ring are integrally combined The overall assembly includes a variety of specifications. 2. The hydraulic press sealing head mechanism with high versatility and quick replacement of the lower sealing body assembly according to claim 1, wherein the upper part of the sealing head, the lower sealing body and the sealing ring are an integral assembly. 3. The hydraulic press sealing head mechanism with high versatility and quick replacement of the lower sealing body assembly according to claim 2, characterized in that, the protective cover is arranged on the upper part of the integral assembly, and one of the integral assembly A suspension ring is provided on the side, and the lower surface of the protective cover and the upper surface of the integral assembly are planes without steps. 4. The sealing head mechanism of the hydraulic press with high versatility and quick replacement of the lower sealing body assembly according to claim 1, characterized in that, a pressure block is provided between the integral assembly and the upper part of the sealing head, and the protection The cover is arranged on the side edge of the integral assembly and the upper part of the sealing head. 5. The hydraulic press sealing head mechanism with high versatility and quick replacement of the lower sealing body assembly according to claim 4, characterized in that, the integral assembly and the side edge of the upper part of the sealing head are wedge-shaped structures, so that The inner wall of the protective cover is a wedge-shaped groove engaged with the wedge-shaped structure. 6 . The highly versatile sealing head mechanism of a hydraulic press that can quickly replace the lower sealing body assembly according to claim 5 , wherein the pressure block is arranged between the upper part of the sealing head and the sealing ring. 7 .

Images