Quick connect blowout preventer

Abstract

The utility model discloses a quick connection blowout preventer pipe, which is composed of a connecting pipe and a quick connection sleeve, the quick connection sleeve is composed of a connecting sleeve and a locking mechanism, one end of the connecting pipe is a male buckle end and a first tooth-shaped butt joint boss is arranged on the outer wall of the connecting pipe, the other end of the connecting pipe is a female buckle end and a second tooth-shaped butt joint boss is arranged on the outer wall of the connecting pipe, the connecting sleeve is arranged on the outer side of the connecting pipe, the first annular end plate and the second annular end plate at both ends of the connecting sleeve are respectively embedded and matched with the first tooth-shaped butt joint boss and the second tooth-shaped butt joint boss, the locking mechanism is arranged on the connecting sleeve along the radial direction and can be matched with the locking hole arranged on the connecting pipe, the cable blowout preventer pipe is stably connected and sealed through the plug-in butt joint between the connecting pipes and the locking of the quick connection sleeve, the operation difficulty and the labor intensity are low without the cooperation of complex tools, the quick assembly and disassembly characteristics greatly improve the operation efficiency, and the cable blowout preventer pipe has good emergency performance and can be put into use only by being customized according to the size in various oil and gas field development scenes.

Description

Technical Field

[0001] This utility model relates to the field of petroleum exploration technology, and in particular to a blowout preventer that can be quickly connected. Background Technology

[0002] With the continuous development of oil and gas field drilling and development technologies, people have become increasingly aware of the damage that pollution can cause to the producing formation. As a result, a series of new methods or processes have been proposed to protect oil and gas formations from damage, such as logging, wireline / steel wire injection perforation, and bridge-firing combined operations. The most important means to implement these new methods or processes is to equip the formation with a complete wireline blowout preventer to ensure safe pressurized production operations.

[0003] Currently, with the increasing depth of shale gas development in China, the pressure of oil and gas wells is rising, which places correspondingly higher demands on the pressure resistance of high-pressure wellhead blowout preventers (BOPs). Traditional cable-stayed blowout preventer (BOP) assemblies use a threaded connection between the pipe bodies, with a union nut threaded onto the joint. In actual construction, this presents problems such as difficult installation and disassembly, and long operation times. Therefore, to improve operational efficiency, such as enabling rapid BOP replacement during continuous operations like shale gas fracturing, and reducing non-operational time, it is necessary to modify the existing cable-stayed BOP system. Utility Model Content

[0004] The purpose of this invention is to provide a quick-connectable blowout preventer that solves the aforementioned technical problems.

[0005] Therefore, the technical solution of this utility model is as follows:

[0006] A quick-connect blowout preventer comprises a connecting pipe and a quick-connect sleeve, the quick-connect sleeve consisting of a connecting sleeve and a locking mechanism; wherein...

[0007] One end of the connecting tube is a male end, and a first toothed mating boss is formed on its outer wall; the other end of the connecting tube is a female end, and a second toothed mating boss is formed on its outer wall; a locking hole is provided on the outer wall of the connecting tube near the female end.

[0008] The connecting sleeve is fitted on the outside of the connecting pipe, and its two ends are respectively provided with a first annular end plate and a second annular end plate. The first annular end plate is provided with a first toothed groove that can be fitted with the first toothed mating boss, and the second annular end plate is provided with a second toothed groove that can be fitted with the second toothed mating boss, and the second toothed mating boss can pass through the first toothed groove.

[0009] The locking mechanism is radially mounted on a connecting sleeve located on one side of the first annular end plate. It includes a pin cylinder fixed on the connecting sleeve. Two short through slots and two long through slots are symmetrically opened on the outer end face of the pin cylinder, and a locking pin is inserted into its inner cavity. The inner end of the locking pin cooperates with the locking hole on the connecting pipe, and the outer end is connected to a pull ring that can be selectively embedded in the two short through slots or the two long through slots. A spring is sleeved on the outer side of the locking pin, and the spring drives the locking pin to move towards the inner end of the pin cylinder.

[0010] Furthermore, an annular groove for a built-in sealing ring is provided on the outer wall of the male end of the connecting pipe, so that the connecting pipes of the two blowout preventers are sealed and plugged together.

[0011] Furthermore, the first toothed mating boss consists of a plurality of first limiting protrusions evenly distributed and spaced apart along the circumferential direction on the outer wall of the connecting pipe, and the second toothed mating boss consists of a plurality of second limiting protrusions evenly distributed and spaced apart along the circumferential direction on the outer wall of the connecting pipe; the second limiting protrusions have the same radial height as the first limiting protrusions and are arranged in a corresponding manner.

[0012] Furthermore, the second toothed mating boss is positioned on the connecting pipe such that when two connecting pipes are plugged in, the female thread end face of one connecting pipe abuts against the second toothed mating boss of the other connecting pipe.

[0013] Furthermore, the axial length of the connecting sleeve is adapted to the distance between the first limiting protrusion and the second limiting protrusion at the insertion position of the two connecting pipes, so that the first annular end plate of the connecting sleeve abuts against multiple second limiting protrusions and the second annular end plate abuts against multiple first limiting protrusions.

[0014] Furthermore, the first limiting protrusion is a strip-shaped arc-shaped body, so that multiple first limiting protrusions can form a discontinuous ring structure; the second limiting protrusion is a strip-shaped arc-shaped body, so that multiple second limiting protrusions can form a discontinuous ring structure; wherein, the arc of the first limiting protrusion is 60°, the arc of the second limiting protrusion is 15°, the six second limiting protrusions are divided into three groups, the arc of the arc plate between the two second limiting protrusions in each group is 30°, and the arc of the arc plate between two adjacent second limiting protrusions in different groups is 60°.

[0015] Furthermore, the locking hole is located on the center line between any two second limiting protrusions, so that when the locking hole is engaged with the locking mechanism, the annular end plates at both ends of the connecting sleeve abut against the first toothed mating protrusion and the second toothed mating protrusion, respectively.

[0016] Furthermore, an insert groove is provided on the outer wall of the connecting sleeve opposite to one of the first limiting protrusions, and a mounting hole penetrating the first annular end plate is provided radially at the bottom of the groove; the pin is inserted into the mounting hole, and a boss that mates with the insert groove is provided on its outer wall, and the pin is fixed to the connecting sleeve by screws that pass through the boss and the bottom of the insert groove.

[0017] Furthermore, the locking pin is a cylindrical rod with an annular boss on its inner end. Correspondingly, the outer inner diameter of the pin cylinder is smaller than the inner inner diameter, and an annular step is formed at the diameter change point on the inner wall. The spring is compressed, with its outer end abutting against the annular step of the pin cylinder and its inner end abutting against the annular boss of the locking pin.

[0018] Furthermore, two short through grooves and two long through grooves are respectively opened in a cross shape on the outer end face of the pin cylinder, and the length of the pull ring is greater than the groove depth of the long through groove.

[0019] Compared to existing technologies, the advantages of this quick-connect blowout preventer include:

[0020] (1) The cable blowout preventer is connected by plugging and connecting the connecting pipes and locking the connecting sleeve on the outside of the plugging connection with another connecting pipe. It is not only stable and well sealed, but also does not require complicated tools, which effectively reduces the difficulty of operation and labor intensity. It has the advantage of quick disassembly and installation, which greatly shortens the loading and unloading time and effectively improves the efficiency of operation, maintenance and repair, etc., and reduces equipment downtime.

[0021] (2) In the structural design of the connecting pipe and the connecting sleeve of the cable blowout preventer, a reliable mechanical connection is used, including the embedding and limiting fixation of the annular end plate of the connecting sleeve and the toothed mating boss, and the insertion connection of the locking pin and the positioning hole, so that the connection structure of the blowout preventer remains stable when subjected to high pressure and impact, and is not easy to loosen or fall off, thus ensuring the safety and stability of the operation; moreover, the quick insertion and removal operation method is conducive to the rapid response of the operators in emergency situations, effectively preventing blowout accidents and ensuring the safety of personnel and equipment.

[0022] (3) The quick-plug connection of the cable blowout preventer is applicable to various oil and gas field development scenarios, including conventional and unconventional oil and gas wells. It can be put into use by simply customizing the structure based on the actual size, pressure level and operation requirements of the wellhead. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of two quick-connect blowout preventers in the connection-locked state provided in an embodiment of this utility model;

[0024] Figure 2This is a cross-sectional view of two quick-connect blowout preventers in the connected and locked state, provided in an embodiment of this utility model.

[0025] Figure 3 This is a schematic diagram of the connecting pipe structure for quick connection of the blowout preventer provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of one side of the connecting sleeve in the quick-connect sleeve that can quickly connect to the blowout preventer provided in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the other side of the connecting sleeve in the quick-connect sleeve that can quickly connect to the blowout preventer provided in an embodiment of the present invention.

[0028] Figure 6 This is a partial cross-sectional view of the quick-connect sleeve for quickly connecting to a blowout preventer provided in an embodiment of the present invention.

[0029] Figure 7 This is a top view of the quick-connect sleeve with pin cylinder for quick connection of blowout preventer provided in an embodiment of the present invention.

[0030] Figure 8 This is a side cross-sectional view of the quick-connect sleeve with a pin cylinder that can be quickly connected to a blowout preventer, provided in an embodiment of the present invention.

[0031] Figure 9 This is a cross-sectional view of the locking pin in the quick-connect sleeve for quick connection of the blowout preventer provided in an embodiment of the present invention.

[0032] Figure 10 This is a partial structural diagram of the locking mechanism for quick connection of the blowout preventer provided in an embodiment of the present invention;

[0033] Figure 11 This is a front view of one side of the first annular end plate of the connecting sleeve in an embodiment of the present invention.

[0034] Figure 12 This is a cross-sectional view of a column formed by connecting two quick-connect blowout preventers in an embodiment of this utility model. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0036] See Figure 1 and Figure 2 The quick-connect blowout preventer consists of a connecting pipe 1 and a quick-connect sleeve 2.

[0037] See Figure 3The connecting pipe 1 is a cylindrical tube with a male thread end at one end and a female thread end at the other end. The inner diameter of the female thread end of the tube is adapted to the outer diameter of its male thread end, so that when the two blowout preventers are connected, the male thread end of one connecting pipe 1 is inserted into the female thread end of the other connecting pipe 1.

[0038] See Figure 2 An annular groove for the built-in sealing ring 8 is provided on the outer wall of the male end of the connecting pipe 1, so that a sealed plug-in connection is formed between the connecting pipes 1 of the two blowout preventers.

[0039] See Figure 3 Three first limiting protrusions 3 are evenly distributed and spaced apart along the circumferential direction on the outer wall of the male end near the connecting pipe 1. The first limiting protrusions 3 are strip-shaped arc-shaped bodies, so that the three first limiting protrusions 3 can form a first toothed mating boss with a discontinuous annular structure. Six second limiting protrusions 4 are spaced apart along the circumferential direction on the outer wall of the female end near the connecting pipe 1. The second limiting protrusions 4 are block-shaped arc-shaped bodies, so that the six second limiting protrusions 4 can form a second toothed mating boss with a discontinuous annular structure. The first limiting protrusions 3 and the second limiting protrusions 4 have the same radial height and are correspondingly arranged, specifically, the extension line of every two second limiting protrusions 4 corresponds to the two sides of the first limiting protrusion 3 on the same side.

[0040] As a preferred technical solution of this embodiment, the second toothed mating boss is positioned on the connecting pipe 1 to satisfy the following: when the two connecting pipes 1 are connected by insertion, the end face of the female thread of one connecting pipe 1 abuts against the second toothed mating boss at the end of the male thread of the other connecting pipe 1, so as to avoid the male thread of the two connecting pipes 1 from being over-inserted with the female thread.

[0041] See Figure 1 and Figure 2 The quick-connect sleeve 2 consists of a connecting sleeve 6 and a locking mechanism 7.

[0042] The connecting sleeve 6 includes a cylindrical body with an inner diameter larger than the outer diameter of the two toothed mating bosses on the end side of the connecting pipe 1, so that the connecting sleeve 6 can be rotatably fitted onto the insertion connection of the two blowout preventers; a first annular end plate 601 is fixed at one end of the cylinder, and a second annular end plate 603 is fixed at the other end.

[0043] See Figure 4 The first annular end plate 601 has three first arc-shaped grooves 602 evenly distributed along its inner annular surface. These grooves are adapted to the three first limiting protrusions 3 on the connecting pipe 1, so that the three first limiting protrusions 3 on the connecting pipe 1 can be fitted and engaged with the three first arc-shaped grooves 602 on the connecting sleeve 6. This allows the male end of the connecting pipe 1 to be inserted into the connecting sleeve 6 from one side of the first annular end plate 601. In other words, the first annular end plate 601 and the male end of the connecting pipe 1 form a specific insertion and engagement relationship.

[0044] Similarly, see Figure 5 The second annular end plate 603 has six second arc-shaped grooves 604 along its inner annular surface, which are respectively adapted to the six second limiting protrusions 4 on the connecting pipe 1. This allows the female buckle end of the connecting pipe 1 to be inserted into the connecting sleeve 6 from one side of the second annular end plate 603 by engaging the six second limiting protrusions 4 on it with the six second arc-shaped grooves 604 on the connecting sleeve. In other words, the second annular end plate 603 and the female buckle end of the connecting pipe 1 form a specific insertion fit.

[0045] The axial length of the connecting sleeve 6 is adapted to the distance between the first limiting protrusion 3 and the second limiting protrusion 4 at the insertion position of the two connecting pipes 1, so that the inner side of the first annular end plate 601 of the connecting sleeve 6, which is sleeved on the outside of the insertion position of the two connecting pipes 1, abuts against the three first limiting protrusions 3, and the inner side of the second annular end plate 603 abuts against the six second limiting protrusions 4.

[0046] like Figure 2 As shown, in practical applications, when two connecting pipes 1 are plugged in, the connecting sleeve 6 on one connecting pipe 1 moves to the side of its male end; at this time, the first annular end plate 601 of the connecting sleeve 6 is located on the side of the male end of the connecting pipe 1, and the second annular end plate 603 is located on the side of the female end of the connecting pipe 1; then, after the two connecting pipes 1 are plugged in, the connecting sleeve 6 moves to the other connecting pipe 1, and passes through the three first arc-shaped grooves 602 on the first annular end plate 601 through the six second limiting protrusions 4 of the other connecting pipe 1, so that the locking mechanism on the connecting sleeve 6 cooperates with the other connecting pipe 1.

[0047] See Figure 11 As a preferred technical solution in this embodiment, the arc of the three first limiting protrusions 3 is designed to be 60° (as shown in ∠5 in the figure); the arc of the six second limiting protrusions 4 is designed to be 15° (as shown in ∠1 and ∠3 in the figure), and they are divided into three groups. The arc of the arc plate between the two second limiting protrusions 4 in each group is 30° (as shown in ∠2 in the figure), and the arc of the arc plate between the two second limiting protrusions 4 in adjacent groups is 60° (as shown in ∠4 in the figure). The advantage of this arc angle design is that, in practical applications, when the connecting sleeve 6 is sleeved on the outside of the insertion point of the two connecting pipes 1, by rotating the connecting sleeve 6, the three first limiting protrusions 3 can be completely abutted against the second annular end plate 603, and at the same time, the six second limiting protrusions 4 can also be completely abutted against the first annular end plate 601, achieving the maximum contact area. At this time, the connecting sleeve 6 exerts the greatest force on the insertion and fixing of the two connecting pipes 1, and the structure is the most stable. On the other hand, as mentioned above, this angle setting also allows the six second limiting protrusions 4 and the three first arc-shaped grooves 602 to form a plug-in fit.

[0048] See Figure 4 A radially recessed groove 605 is provided on the connecting sleeve 6 located on one side of the second annular end plate 603. A mounting hole 606, penetrating into the inner cavity of the connecting sleeve 6, is provided radially centered at the bottom of the recessed groove 605. Correspondingly, two threaded blind holes 607 are symmetrically provided on the bottom of the grooves on both sides of the mounting hole 606. In this embodiment, the recessed groove 605 is located opposite to one of the first limiting protrusions 3 and is centered, so that the mounting hole 606 is specifically opened from the outer wall of the end side of the connecting sleeve 6 on the first annular end plate 601, thereby increasing the axial length of the mounting hole 606 and ensuring the stability of the locking mechanism 7 on the connecting sleeve 6.

[0049] See Figure 3 A locking hole 5 is radially formed on the outer wall near the female buckle end of the connecting tube 1 for insertion and engagement with the locking mechanism 7, so that the connecting sleeve 6 is stably fixed at the connection of the two connecting tubes 1. The locking hole 5 is located on the center line between any two sets of second limiting protrusions 4, so that when the locking hole 5 is engaged with the locking mechanism 7, based on the curvature design of the first limiting protrusion 3 and the second limiting protrusion 4 as described above, the annular end plates at both ends of the connecting sleeve 6 can reach the maximum area with the two toothed mating protrusions at the insertion point of the two connecting tubes 1.

[0050] See Figure 6 The locking mechanism 7 includes a pin cylinder 9, a locking pin 10, a spring 11, and a pull ring 12.

[0051] See Figure 7 and Figure 8 The pin cylinder 9 includes a cylindrical body with an inner diameter that matches the diameter of the radial mounting hole 604, allowing the lower side of the cylinder to be inserted into the radial mounting hole 604. The outer wall of the cylinder has a boss 901 that mates with the fitting groove 603, and symmetrically arranged connecting holes 902 on the boss 901. The pin cylinder 9 is fitted into the fitting groove 603, and the two connecting holes 902 correspond to the positions of two threaded blind holes 607. Pins 13, sequentially inserted into the connecting holes 902 and threaded blind holes 607 on each side, are used to radially fix the pin cylinder 9 onto the connecting sleeve 6. Two short through grooves 903 and two long through grooves 904 are symmetrically arranged axially on the outer end face of the pin cylinder 9, forming a cross-shaped arrangement.

[0052] See Figure 9The locking pin 10 is a cylindrical rod with an annular boss 1001 on its inner end. In terms of size design, the inner diameter of the pin cylinder 9 near the inner end is smaller than the inner diameter of the pin cylinder 9 near the outer end, and an annular step 905 is formed on the inner wall at the diameter change. The outer diameter of the locking pin 10 is adapted to the inner diameter of the pin cylinder 9 near the outer end, and the outer diameter of the annular boss 1001 is adapted to the inner diameter of the pin cylinder 9 near the inner end and the diameter of the locking hole 5. The locking pin 10 is inserted into the pin cylinder 9 from the inner end, so that when it moves up and down relative to the pin cylinder 9, the annular step 905 limits its upward movement distance.

[0053] See Figure 10 The other end of the locking pin 10 has a radial through hole 1002, so that the pull ring 12 is connected to the outer end of the locking pin 10 by passing through the radial through hole 1002; the pull ring 12 is used to pull the locking pin 10 to move and rotate relative to the pin cylinder 9; in practical applications, the pull ring 12 can be selectively fitted into two short through slots 903 or two long through slots 904, so as to control the different lengths of the inner end of the locking pin 10 extending beyond the inner end of the pin cylinder 9 by controlling the different fitting positions of the pull ring 12 on the pin cylinder 9.

[0054] See Figure 6 The spring 11 is compressed and sleeved on the outside of the rod of the locking pin 10. Its outer end abuts against the annular step 905 of the pin cylinder 9, and its inner end abuts against the annular boss 1001 of the locking pin 10.

[0055] In practical applications, the pull ring 12 is initially fitted into the two short through slots 903, and the spring 11, which is in a compressed state, keeps the locking pin 10 flush with the inner end of the pin cylinder 9. When the connecting pipes 1 of the two blowout preventers are connected, the pull ring 12 is pulled outward and rotated, so that the pull ring 12 is fitted into the two long through slots 904. At this time, the spring 11, which is in a compressed state, gives the locking pin 10 the power to extend from the inner end of the pin cylinder 9. When the connecting sleeve 6 is rotated, the locking pin 10 moves to the position of the locking hole 5, and the locking pin 10 pops out and inserts into the locking hole 5. Then, the two threaded connecting pipes 1 form a stable locking connection through the quick-connect sleeve 2.

[0056] like Figure 12 As shown, when these cable blowout preventers are connected sequentially to form a pipe column, they are generally arranged with the male end of connecting pipe 1 facing down and the female end facing up, and then connected again. The following describes the specific usage method of this quick-connect blowout preventer using the connection process of two cable blowout preventers as an example.

[0057] A cable blowout preventer is vertically suspended above the wellhead and aligned with the cable blowout preventer at the top of the wellhead. For the cable blowout preventer in the suspended state, its connecting sleeve 6 slides down to the bottom of the connecting pipe 1 under the action of gravity. At this time, since the second annular end plate 603 of the connecting sleeve 6 is pressed against the three first limiting protrusions 3 at the bottom of the connecting pipe 1, and since there is no specific insertion relationship between the two, the connecting sleeve 6 will not slip off the connecting pipe 1.

[0058] The cable blowout preventer is gradually lowered until the male end of the bottom of the connecting pipe 1 begins to align with the female end of the lower connecting pipe 1 and forms a plug-in connection. During this process, the connecting sleeve 6 is obstructed by the second toothed mating boss on the lower connecting pipe 1 and moves upward relative to the upper connecting pipe 1 until the two connecting pipes 1 are plugged in.

[0059] Next, the on-site workers rotated the connecting sleeve 6. When the connecting sleeve 6 rotated to the point where the three first arc-shaped grooves 602 on the first annular end plate 601 at its bottom were engaged with the six second limiting protrusions 4, as shown... Figure 11 As shown, the connecting sleeve 6 automatically falls and is fitted onto the insertion connection of the two connecting rods 1; pull the pull ring 12 on the locking mechanism 7 to change the pull ring from being embedded in the two short through grooves 903 to being embedded in the two long through grooves 904.

[0060] Continue rotating the connecting sleeve 6 until the locking mechanism 7 is aligned with the locking hole 5 on the lower connecting tube 1. The locking pin 10 in the locking mechanism 7 is then inserted into the locking hole 5 under the driving action of the spring 11, thus completing the structural locking of the connecting sleeve 6 and the two connecting tubes 1.

Claims

1. A quick-connectable blowout preventer, characterized in that, It consists of a connecting pipe (1) and a quick-connect sleeve (2), the quick-connect sleeve (2) consisting of a connecting sleeve (6) and a locking mechanism (7); wherein, One end of the connecting tube (1) is a male end, and a first toothed mating boss is formed on its outer wall; the other end of the connecting tube (1) is a female end, and a second toothed mating boss is formed on its outer wall; a locking hole (5) is provided on the outer wall of the connecting tube (1) on the side near the female end. The connecting sleeve (6) is fitted on the outside of the connecting tube (1). The two ends of the sleeve are respectively provided with a first annular end plate and a second annular end plate. The first annular end plate is provided with a first toothed groove that can be fitted with the first toothed docking boss. The second annular end plate is provided with a second toothed groove that can be fitted with the second toothed docking boss. The second toothed docking boss can pass through the first toothed groove. The locking mechanism (7) is radially disposed on the connecting sleeve (6) located on one side of the first annular end plate. It includes a pin cylinder (9) fixed on the connecting sleeve (6). Two short through slots (903) and two long through slots (904) are symmetrically opened on the outer end face of the pin cylinder (9). A locking pin (10) is inserted into its inner cavity. The inner end of the locking pin (10) is engaged with the locking hole (5) on the connecting pipe (1). The outer end is connected to a pull ring (12) that can be selectively embedded in the two short through slots (903) or the two long through slots (904). A spring (11) is sleeved on the outer side of the locking pin (10). The spring (11) drives the locking pin (10) to move towards the inner end of the pin cylinder (9).

2. The quick-connectable blowout preventer according to claim 1, characterized in that, An annular groove for a built-in sealing ring (8) is provided on the outer wall of the male end of the connecting pipe (1) so that the connecting pipes (1) of the two blowout preventers are sealed and connected.

3. The quick-connectable blowout preventer according to claim 1, characterized in that, The first toothed mating boss consists of multiple first limiting protrusions (3) evenly distributed and spaced on the outer wall of the connecting pipe (1) along the circumferential direction, and the second toothed mating boss consists of multiple second limiting protrusions (4) evenly distributed and spaced on the outer wall of the connecting pipe (1) along the circumferential direction; the second limiting protrusions (4) have the same radial height as the first limiting protrusions (3) and are arranged in a corresponding manner.

4. The quick-connectable blowout preventer according to claim 1, characterized in that, The second toothed mating boss is positioned on the connecting pipe (1) such that when two connecting pipes (1) are connected by insertion, the end face of the female thread of one connecting pipe (1) abuts against the second toothed mating boss of the other connecting pipe (1).

5. The quick-connectable blowout preventer according to claim 1, characterized in that, The axial length of the connecting sleeve (6) is adapted to the distance between the first limiting protrusion (3) and the second limiting protrusion (4) at the insertion position of the two connecting pipes (1), so that the first annular end plate (601) of the connecting sleeve (6) abuts against multiple second limiting protrusions (4) and the second annular end plate (603) abuts against multiple first limiting protrusions (3).

6. The quick-connectable blowout preventer according to claim 3, characterized in that, The first limiting protrusion (3) is a strip-shaped arc body, so that multiple first limiting protrusions (3) can form a discontinuous ring structure; the second limiting protrusion (4) is a strip-shaped arc body, so that multiple second limiting protrusions (4) can form a discontinuous ring structure; wherein, the arc of the first limiting protrusion (3) is 60°, the arc of the second limiting protrusion (4) is 15°, the six second limiting protrusions (4) are divided into three groups, the arc of the arc plate between the two second limiting protrusions (4) in each group is 30°, and the arc of the arc plate between the two adjacent second limiting protrusions (4) in different groups is 60°.

7. The quick-connectable blowout preventer according to claim 1, characterized in that, The locking hole (5) is located on the center line between any two second limiting protrusions (4) in any group, so that when the locking hole (5) is engaged with the locking mechanism (7), the annular end plates at both ends of the connecting sleeve (6) abut against the first toothed mating protrusion and the second toothed mating protrusion respectively.

8. The quick-connectable blowout preventer according to claim 1, characterized in that, An insert groove (605) is provided on the outer wall of the connecting sleeve (6) opposite to one of the first limiting protrusions 3. A mounting hole that passes through the first annular end plate (601) is provided in the bottom of the groove in the radial direction. The pin cylinder (9) is inserted into the mounting hole. A boss (901) that cooperates with the insert groove (605) is provided on its outer wall. The pin cylinder (9) is fixed to the connecting sleeve (6) by screws that pass through the boss (901) and the bottom of the insert groove (605).

9. The quick-connectable blowout preventer according to claim 1, characterized in that, The locking pin (10) is a cylindrical rod with an annular boss (1001) on its inner end. Correspondingly, the outer inner diameter of the pin cylinder (9) is smaller than the inner inner diameter, and an annular step (905) is formed at the diameter change point on the inner wall. The spring (11) is compressed, with its outer end abutting against the annular step (905) of the pin cylinder (9) and its inner end abutting against the annular boss (1001) of the locking pin (10).

10. The quick-connectable blowout preventer according to claim 1, characterized in that, Two short through grooves (903) and two long through grooves (904) are respectively opened in a cross shape on the outer end face of the pin cylinder (9), and the length of the pull ring (12) is greater than the groove depth of the long through groove (904).

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