Bag type anti-blowout sealing device

Abstract

The present invention provides a bag-type anti-blowout hole sealing device, comprising: a hole sealing sleeve and an anti-blowout pressure cap, a plurality of flange holes are provided on the pipe wall of the hole sealing sleeve; the anti-blowout pressure cap comprises: a stabilizing sleeve and an inner chamber, a hole sealing bag is arranged inside the inner chamber. During the drilling construction process, the bag-type anti-blowout hole sealing device of the present invention is fixed in the medium to be constructed, the anti-blowout pressure cap and the hole sealing sleeve are fixed together to seal the borehole, the hole sealing bag expands and presses the drill rod to seal the borehole, and the gate valve on the hole sealing sleeve controls the internal pressure of the borehole, so as to realize drilling, pressure relief and pumping at the same time, pressure relief and pumping during the drilling process, thereby improving safety, and the structure is stable and easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling rig drill rods, and in particular relates to a bag-type anti-blowout sealing device. Background Art

[0002] like Figure 1 As shown, in the traditional drilling process, the drill bit 1a is directly connected to the drill rod 1b, the medium enters from the central through hole 1c, and the drilled material 1d is discharged along the gap between the outer surface of the steel pipe of the drill rod 1b and the borehole 1e. In this process, the flow of the medium and the material 1d will damage the borehole 1e, causing the borehole 1e to become larger and the borehole 1e to deviate. In order to prevent damage to the borehole, those skilled in the art have proposed a drill rod with an inner channel and an outer channel, the medium enters the drill bit from the inner channel, and the medium carrying the material flows out from the outside, adopting a dual-channel structure, one channel for liquid intake and the other channel for liquid discharge, which will not damage the borehole, thereby ensuring the size of the borehole. However, the borehole is still open, and due to the high gas pressure and ground pressure around the borehole 1e, as the borehole extends, the pressure field is destroyed, causing gas and materials to spray out along the borehole, which brings inconvenience to the construction and causes safety accidents. Summary of the invention

[0003] To solve the above technical problems, the present invention provides a bag-type anti-spraying sealing device. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0004] The present invention adopts the following technical solution:

[0005] In some optional embodiments, a bag-type blowout-preventing and sealing device is provided, comprising: a sealing casing for sealing a drilled hole and a blowout-preventing pressure cap arranged at the end of the sealing casing, a plurality of flange holes being opened on the pipe wall of the sealing casing; the blowout-preventing pressure cap comprises: a stabilizing casing and an inner chamber arranged between the inner surface of the sealing casing and the outer surface of the stabilizing casing, a sealing bag being arranged inside the inner chamber, and a sealing hole communicating with the inner chamber being opened on the pipe wall of the stabilizing casing.

[0006] In some optional embodiments, a gate valve is provided on the flange hole.

[0007] In some optional embodiments, the number of the flange holes is 1 to 4.

[0008] In some optional embodiments, the blowout preventer pressure cover also includes: a connecting plate welded to the stabilizing sleeve, an extended side plate is arranged at the end of the sealing sleeve, and bolt holes are opened on the connecting plate and the extended side plate so that the blowout preventer pressure cover can be fixed to the sealing sleeve by bolts.

[0009] In some optional embodiments, a sealing gasket is provided between the connecting plate and the extension side plate.

[0010] In some optional embodiments, an inflation channel is opened on the wall of the inner chamber, and a blocking piece is provided at the end of the inflation channel.

[0011] The beneficial effects brought by the present invention are as follows: during the drilling construction process, the bag-type anti-blowout sealing device of the present invention is fixed in the medium being constructed, the anti-blowout pressure cover and the sealing casing are fixed together to seal the borehole, the sealing bag expands and presses the drill rod to seal the borehole, and the gate valve on the sealing casing controls the internal pressure of the borehole, thereby achieving drilling, pressure relief and pumping at the same time. Pressure relief and pumping are carried out during the drilling process, thereby improving safety, and the structure is stable and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the traditional drill pipe structure;

[0013] Figure 2 It is a schematic cross-sectional view of the axial structure of the bag-type anti-blowout sealing device of the present invention;

[0014] Figure 3 It is a schematic diagram of the side view of the end face of the bag-type anti-blowout sealing device of the present invention;

[0015] Figure 4 It is a schematic diagram of the axial cross-sectional structure of the sealing sleeve of the bag-type anti-blowout sealing device of the present invention;

[0016] Figure 5 It is a schematic diagram of the side view of the sealing sleeve end face of the bag-type anti-blowout sealing device of the present invention;

[0017] Figure 6 It is a schematic diagram of the axial cross-sectional structure of the blowout prevention gland of the bag-type blowout prevention and sealing device of the present invention;

[0018] Figure 7 It is a schematic diagram of the structure of the blowout prevention pressure cap end face of the bag-type blowout prevention sealing device of the present invention;

[0019] Figure 8 It is a schematic diagram of the axial cross-sectional structure of the sealing bag of the bag-type anti-blowout sealing device of the present invention;

[0020] Fig. 9 It is a schematic diagram of the side view of the end face of the sealing bag of the bag-type anti-blowout sealing device of the present invention;

[0021] Fig.10 It is a working principle diagram of the bag-type anti-blowout sealing device of the present invention. DETAILED DESCRIPTION

[0022] The following description and accompanying drawings fully demonstrate specific embodiments of the present invention so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent possible variations only. Unless clearly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments.

[0023] like Figures 2 to 10 As shown, in some illustrative embodiments, a bag-type blowout prevention and sealing device is provided, comprising: a sealing sleeve 2, a blowout prevention pressure cover 1, a sealing bag 3, a gate valve 4 and a sealing gasket 5.

[0024] During operation, the bag-type anti-blowout sealing device of the present invention is fixed to the opening of the borehole 103 , one end of the sealing sleeve 2 extends into the borehole 103 and seals the borehole 103 , and the anti-blowout pressure cover 1 is arranged at the other end of the sealing sleeve 2 .

[0025] The blowout prevention cap 1 includes: a stabilizing sleeve 14, a connecting plate 13 and an inner chamber 12. The inner chamber 12 is arranged between the inner surface of the sealing sleeve 2 and the outer surface of the stabilizing sleeve 14. A plugging hole 11 communicating with the inner chamber 12 is provided on the tube wall of the stabilizing sleeve 14, so that the inner chamber 12 is a semi-closed cavity. A sealing bag 3 is arranged inside the inner chamber 12. When working, the drill rod 109 extends from the stabilizing sleeve 14 into the sealing sleeve 2 and enters the borehole 103 through the sealing sleeve 2. During the drilling process, the sealing bag 3 is inflated to expand to form a sealing bag. The sealing bag 3 protrudes from the plugging hole 11 to the inside of the stabilizing sleeve 14 due to its own expansion, thereby pressing the drill rod 109 to prevent the borehole 103 from leaking.

[0026] A plurality of flange holes 9 are provided on the pipe wall of the sealing casing 2. During the entire construction process, the gas generated by the drilling hole 103 and the solid-liquid medium material 102 are discharged through the flange holes 9. A gate valve 4 is provided on the flange hole 9. When the drilling hole 103 is in a state of medium spraying, the gate valve 4 is closed to seal the drilling hole 103 to prevent the solid-liquid medium material 102 from spraying out and causing an accident. The number of flange holes is 1 to 4. When the number of flange holes is greater than 1, it is convenient for the gas and the solid-liquid medium material 102 to be discharged through different flange holes, and the drilling displacement can be increased, which is convenient for adjustment, improves operability, and is safer.

[0027] The connecting plate 13 is welded to the stabilizing sleeve 14, and an extension side plate 10 is arranged at the end of the sealing sleeve 2. Bolt holes are provided on the connecting plate 13 and the extension side plate 10 so that the anti-blowout pressure cover can be fixed to the sealing sleeve 2 by bolts 6, which is easy to install and has a stable structure.

[0028] A sealing gasket 5 is provided between the connecting plate 13 and the extended side plate 10 to increase the sealing performance of the bag-type anti-blowout sealing device of the present invention.

[0029] An inflation channel 8 is provided on the wall of the inner chamber 12, a plugging member 7 is provided at the end of the inflation channel 8, the air inlet of the sealing bag 3 is located in the inflation channel 8, the sealing bag 3 is inflated through the inflation channel 8, and after the inflation is completed, the plugging member 7 is sealed, which is convenient for the inflation and deflation operation, and is simple and reliable. The plugging member 7 can be selected as a rubber block.

[0030] During operation, the medium 101 enters from the first channel 107 of the drill rod 109, the drilled solid-liquid medium material 102 is filtered along with the medium 101 from the holes on the slag collector and stabilizer 104 into the second channel 108 of the drill rod and discharged, and the collapsed hole material of the drill hole 103 and the gas generated by the drilling are discharged through the flange hole 9. When there are multiple flange holes 9, the solid-liquid medium material 102 can be selected to be discharged from one of the flange holes, and the gas generated by the drilling hole 103 can be discharged from another flange hole. During the drilling process, the sealing bag 3 is inflated to expand, and the sealing piece 7 is used to block the inflation port of the sealing bag 3 to form a sealing bag to compress the drill rod 109 to prevent leakage of the borehole 103. When the medium is sprayed out of the borehole 103, the gate valve 4 is closed to seal the borehole 103 to prevent the solid-liquid medium material 102 from spraying out and causing an accident. During the entire construction process, the gas generated by the borehole 103 and the solid-liquid medium material 102 are discharged from different pipe holes 106, realizing drilling, extraction and separation of slag and gas, thereby improving drilling safety and extraction efficiency.

[0031] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

Claims

1. Bag-type anti-blowout sealing device, characterized in that: include: A sealing sleeve for sealing the drilled hole and a blowout-proof pressure cap arranged at the end of the sealing sleeve, wherein a plurality of flange holes are provided on the pipe wall of the sealing sleeve; The anti-blowout pressure cap comprises: a stabilizing sleeve and an inner chamber arranged between the inner surface of the sealing sleeve and the outer surface of the stabilizing sleeve, a sealing bag is arranged inside the inner chamber, a plugging hole communicating with the inner chamber is arranged on the tube wall of the stabilizing sleeve, so that the inner chamber is a semi-closed cavity; an inflation channel is arranged on the wall of the inner chamber, and a plugging piece is arranged at the end of the inflation channel; During operation, the medium enters from the first channel of the drill pipe, and the solid and liquid medium materials drilled are filtered through the holes on the slag collector and stabilizer and discharged into the second channel of the drill pipe. The collapsed hole materials, the drilled materials and the gas generated by drilling are discharged through the flange holes. When there are multiple flange holes, the solid and liquid medium materials are discharged from one of the flange holes, and the gas generated by drilling is discharged from the other flange holes; During the drilling process, the sealing bag is inflated to expand, and the sealing part is used to block the inflation port of the sealing bag to form a sealing bag to compress the drill rod to prevent leakage of the drilling hole. When the medium is sprayed out of the drilling hole, the gate valve is closed to seal the drilling hole to prevent accidents caused by the spraying of solid and liquid medium materials. During the entire construction process, the gas generated by the drilling hole and the solid and liquid medium materials are discharged from different pipe holes, realizing drilling and extraction, and slag gas separation, thereby improving drilling safety and extraction efficiency.

2. The bag-type anti-spray sealing device according to claim 1, characterized in that: A gate valve is arranged on the flange hole.

3. The bag-type anti-spray sealing device according to claim 2, characterized in that: The number of the flange holes is 1 to 4.

4. The bag-type anti-blowout sealing device according to claim 1 or 3, characterized in that: The blowout-proof pressure cap also includes: a connecting plate welded on the stabilizing sleeve, an extension side plate is arranged at the end of the sealing sleeve, and bolt holes are provided on the connecting plate and the extension side plate so that the blowout-proof pressure cap can be fixed to the sealing sleeve by bolts.

5. The bag-type anti-spray sealing device according to claim 4, characterized in that: A sealing gasket is arranged between the connecting plate and the extension side plate.

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