CN219101253U - Connecting piece and drilling derrick - Google Patents

Abstract

The utility model belongs to the technical field of drilling equipment, and particularly relates to a connecting piece and a drilling derrick. The side wall of the cylinder body is provided with an interface communicated with the inside of the cylinder body. The valve plate is rotatably arranged on the cylinder body. The valve plate is provided with a pressure relief opening. The inside of end cap has the pressure release passageway, and the opening that is linked together with the pressure release passageway has been seted up to the one end of end cap, has seted up the pressure transmission hole that is linked together with the pressure release passageway on the lateral wall of end cap, and the end cap slides to wear to locate in the pressure release mouth, and the opening is located the pressure release mouth and sets up outward, under the exogenic action, and the end cap removes towards the valve plate to make the pressure transmission hole be linked together with the inside of barrel. One end of the reset piece is connected to the valve plate, the other end of the reset piece is located at the pressure relief opening and is abutted to one end of the plug, which is far away from the opening, the reset piece is used for moving one end of the plug, which is close to the reset piece, towards the pressure relief opening to seal the pressure relief opening in a reset state.

Description

Connecting piece and drilling derrick

Technical Field

The utility model belongs to the technical field of drilling equipment, and particularly relates to a connecting piece and a drilling derrick.

Background

When drilling operation is carried out, drilling fluid needs to be injected into the well through a drill string (a drill rod), and during normal working condition operation, the drilling fluid needs to be injected from the top of the drill string, but as the drilling depth is continuously increased, the drill string needs to be additionally connected to the top of the drill string, so that the injection of the drilling fluid needs to be stopped, drill cuttings in a well hole are settled, and underground safety accidents are easy to occur.

Disclosure of Invention

The utility model provides a connecting piece and a drilling derrick, which are used for solving the technical problem that drilling fluid injection needs to be stopped due to the fact that a drilling string is additionally connected to the top of a drilling string in the prior art, so that drilling cuttings in a drilling hole are settled.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme:

in one aspect, embodiments of the present application provide a connector. The connecting piece comprises a cylinder body, a valve plate, a plug and a resetting piece. The side wall of the cylinder body is provided with an interface communicated with the inside of the cylinder body. The valve plate is rotatably arranged on the cylinder body. The valve plate is used for opening and closing the interface, the valve plate is used for enabling fluid to flow into the cylinder body through the interface in a unidirectional mode, and the valve plate is provided with a pressure relief opening. The inside of end cap has the pressure release passageway, the one end of end cap seted up with the opening that the pressure release passageway is linked together, set up on the lateral wall of end cap with the pressure transmission hole that the pressure release passageway is linked together, the end cap slides and wears to locate in the pressure release mouth, the opening is located the pressure release mouth sets up outward, under the exogenic action, the end cap orientation the valve plate removes, so that the pressure transmission hole with the inside of barrel is linked together. One end of the reset piece is connected to the valve plate, the other end of the reset piece is located at the pressure relief opening and is abutted to one end of the plug away from the opening, and the reset piece is used for moving one end of the plug, which is close to the reset piece, towards the pressure relief opening to seal the pressure relief opening in a reset state.

In this application embodiment, reset piece is because under the effect of elasticity, with the end cap looks butt, thereby the end cap shutoff is in the interface, the pressure transmission hole is not linked together with the inside of barrel, thereby make the inside of barrel different with the pressure of pressure release passageway, act on the end cap at external force, the end cap slides towards the inside of barrel, thereby the pressure transmission hole has been balanced, pressure release passageway and the inside intercommunication of barrel each other, thereby the internal pressure of pressure transmission hole has been balanced, pressure release passageway and barrel, the pressure of valve plate both sides has been balanced promptly, make the pressure of valve plate both sides the same, in this way, the valve plate just can inwards open, based on above-mentioned basis, drilling fluid can directly be through the top injection drilling fluid of barrel or through the interface injection drilling fluid, consequently drilling fluid's injection can not take place to stop, the subsidence of drill chip has been avoided.

In some embodiments, the plug includes a first stop collar, a connecting shaft, and a second stop collar. The first limiting ring is used for being abutted with one end of the resetting piece, which is close to the pressure relief opening, and is located in the cylinder body, and the diameter of the first limiting ring is larger than that of the pressure relief opening. One end of the connecting shaft is connected with the first limiting ring, the pressure relief channel is positioned in the connecting shaft, the opening is formed in the end face of the connecting shaft, which is far away from one end of the first limiting ring, the pressure transmission hole is formed in the side wall of the connecting shaft, and the connecting shaft penetrates through the pressure relief opening and is in sliding fit with the pressure relief opening. The second limiting ring is arranged at one end, far away from the first limiting ring, of the connecting shaft, and the diameter of the second limiting ring is larger than that of the pressure relief opening.

In some embodiments, the plug further comprises a sealing ring sleeved outside the connecting shaft and in sliding fit with the pressure relief opening.

In some embodiments, a plurality of grooves extending along radial direction are arranged on the end face of the connecting shaft far away from one end of the first limiting ring, and the grooves are communicated with the opening.

In some embodiments, the connector further comprises a connector mounted within the interface, and the valve plate is rotatably mounted on an end of the connector extending into the interface.

In some embodiments, the connector further includes an adapter, the interior of the adapter is a hollow structure, one end of the adapter is communicated with the adapter, one end of the adapter is arranged in the adapter in a penetrating manner, and under the action of external force, the adapter moves towards the plug and abuts against the connecting shaft, so that the connecting shaft slides in the pressure relief opening, and the pressure transfer hole is communicated with the interior of the cylinder.

In some embodiments, the adapter includes a first shaft section, a first cone section, a second shaft section, and a steering wheel. One end of the first shaft section is communicated with the joint. One end of the first cone section is communicated with one end of the first shaft section, which is far away from the joint. One end of the second shaft section is communicated with one end of the first cone section away from the first shaft section. The steering wheel is sleeved outside the second shaft section.

In some embodiments, the inner side wall of the connector is provided with a plurality of first clamping grooves and second clamping grooves which are mutually communicated, the first clamping grooves are in one-to-one correspondence with the second clamping grooves, an included angle is formed between the first clamping grooves and the extending directions of the second clamping grooves, the first clamping grooves are far away from the notch of the second clamping grooves and extend to the end face of the connector, the notch of the second clamping grooves far away from the first clamping grooves and the end face of the connector are provided with a distance, and the outer side wall of the first shaft section is provided with a clamping protrusion which slides into the second clamping grooves relative to the first clamping grooves and is in butt joint with the groove wall of one end of the second clamping grooves far away from the first clamping grooves.

In some embodiments, the connector further comprises a connecting tube, a one-way valve, and a sleeve. One end of the connecting pipe is communicated with the cylinder body, and the connecting pipe is positioned above the connector. The check valve is installed in the connecting pipe and is used for enabling fluid to flow into the connecting pipe through the check valve in a one-way mode. And the sleeve is sleeved outside the connecting pipe, and one end of the sleeve, which is close to the cylinder body, is connected with the cylinder body.

In another aspect, embodiments of the present application provide a drilling rig. The drilling derrick comprises the connecting piece, at least one drill string, a drilling floor, a derrick and a three-way valve. One end of at least one drill string is mounted to the bottom of the barrel and communicates with the interior of the barrel. The drill floor is placed on the ground. The derrick is mounted on the drill floor, and the drill string is rotatably connected with the derrick. The three-way valve is provided with an inlet, a first outlet and a second outlet, wherein the first outlet is communicated with the top of the cylinder body through a pipeline, and the second outlet is communicated with the interface through a pipeline.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a drilling derrick according to an embodiment of the present utility model;

FIG. 2 is a schematic structural view of a connector according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an explosion structure of a connector according to an embodiment of the present utility model;

FIG. 4 is a schematic view of another exploded view of a connector according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a joint according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a first card slot and a second card slot according to an embodiment of the present utility model;

FIG. 7 is a schematic structural view of a connecting member when a valve plate is opened according to an embodiment of the present utility model;

FIG. 8 is a cross-sectional view taken along the direction B-B in FIG. 7;

FIG. 9 is an enlarged view of the area indicated by the circle in FIG. 8;

FIG. 10 is a schematic structural view of a connecting member when a valve plate is closed according to an embodiment of the present utility model;

FIG. 11 is a cross-sectional view taken along the line A-A in FIG. 10;

FIG. 12 is an enlarged view of the area indicated by the circle in FIG. 11;

fig. 13 is a schematic structural diagram of a plug according to an embodiment of the present utility model;

fig. 14 is a partial cross-sectional view of a plug provided by an embodiment of the present utility model.

Detailed Description

Embodiments of the present application are described in detail below with reference to the accompanying drawings.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, welded, bolted, or riveted; the connecting device can be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Examples

In the prior art, when the top of the drill string is additionally connected with the drill string, the injection of drilling fluid needs to be stopped, so that the drill cuttings in the drilling well are settled.

In order to solve the above technical problems, as shown in fig. 1, an embodiment of the present application provides a drilling derrick 100. The derrick 100 may include a connection 10, at least one drill string 20, a drill floor 30, a derrick 40, and a three way valve 50. The interior of the drill string 20 is a hollow structure, and the number of the drill strings 20 may be one, two, three or four, etc., and the number of the drill strings 20 is selected according to the depth of the well, which is not particularly limited in the embodiment of the present application.

The structure of the connector 10 is described in detail below, and as shown in fig. 2 to 6, the connector 10 may include a cylinder 11, a valve plate 12, a plug 13, and a restoring member 14. The side wall of the cylinder 11 is provided with an interface 110 which is communicated with the inside of the cylinder 11. The interface 110 is used for introducing drilling fluid, the valve plate 12 is rotatably arranged on the cylinder 11, the valve plate 12 can be rotatably connected to the cylinder 11 through a pin shaft, the valve plate 12 rotates around the pin shaft, so that the valve plate 12 opens and closes the interface 110, opening and breaking of drilling fluid injection are realized, the valve plate 12 can freely rotate in the cylinder 11, when the valve plate 12 rotates to the interface 110, the valve plate 12 is abutted with the inner side wall of the cylinder 11, so that the interface 110 is closed, and the valve plate 12 cannot rotate into the interface 110. That is, the valve plate 12 is used to make fluid (drilling fluid) flow into the cylinder 11 through the port 110 in one direction, and as shown in fig. 8 and 9, a pressure relief port 120 is formed in the valve plate 12, the pressure relief port 120 penetrates through an end surface of the valve plate 12, and the pressure relief port 120 is used to balance the pressure between the port 110 and the cylinder 11 when the valve plate 12 closes the port 110.

As shown in fig. 13 and 14, the inside of the plug 13 is provided with a pressure release channel 130, the pressure release channel 130 extends along the axial direction of the plug 13, one end of the plug 13 is provided with an opening 131 communicated with the pressure release channel 130, the side wall of the plug 13 is provided with a pressure transmission hole 132 communicated with the pressure release channel 130, the pressure transmission hole 132 is far away from the opening 131, the plug 13 is slidably arranged in the pressure release opening 120, the opening 131 is arranged outside the pressure release opening 120, under the action of external force, the plug 13 moves towards the valve plate 12, so that the pressure transmission hole 132 extends into the cylinder 11, the pressure transmission hole 132 is communicated with the inside of the cylinder 11, the pressure inside the cylinder 11 is released through the pressure transmission hole 132, the pressure release channel 130 and the pressure inside the cylinder 11 are balanced, and the pressures at two sides of the valve plate 12 are balanced, so that the valve plate 12 opens the interface 110. One end of the reset piece 14 is connected to the valve plate 12, the other end is located at the pressure relief opening 120 and is abutted to one end of the plug 13 away from the opening 131, the reset piece 14 is used for moving one end of the plug 13, which is close to the reset piece 14, towards the pressure relief opening 120 to seal the pressure relief opening 120 in a reset state, and it should be noted that the reset piece 14 has an elastic force, and the reset piece 14 may be an elastic sheet made of a metal material or an elastic sheet supported by a plastic material.

Based on the above, for the purpose of illustrating the specific composition of the drilling derrick 100, one end of at least one drill string 20 is mounted to the bottom of the barrel 11 and communicates with the interior of the barrel 11. The drill floor 30 is placed on the ground. The derrick 40 is mounted on the drill floor 30, the drill string 20 is rotatably connected with the derrick 40, and the drill string 20 is more stable when the drill string 20 performs drilling operation by fixing the drill floor 30 and the derrick 40. The three-way valve 50 is of an existing product structure, the three-way valve 50 is provided with an inlet 51, a first outlet 52 and a second outlet 53, the inlet 51 of the three-way valve 50 is used for introducing drilling fluid, the drilling fluid is respectively discharged from the first outlet 52 and the second outlet 53, the first outlet 52 is communicated with the top of the cylinder 11 through a pipeline, and the second outlet 53 is communicated with the interface 110 through a pipeline. The drill string 20 may be one, two, three or four, etc., and a different number of drill strings may be selected according to the depth of drilling, and when the drill string 20 is one, as described above, the top of the drill string 20 is connected to the bottom of the barrel 11 and communicates with the interior of the barrel 11, and the drilling fluid thereof is introduced into the top of the barrel 11 through the first outlet 52, and the drilling fluid of the second outlet 53 is introduced into the interior of the barrel 11 through the interface 110. In the case of two drillstrings 20, one drillstring 20 is connected to the top of the barrel 11, the other drillstring 20 is connected to the bottom of the barrel 11, and the barrel 11 is positioned between the two drillstrings 20, so that injection of drilling fluid into the top of the barrel 11 is stopped when the drillstring 20 is connected to the top of the barrel 11, and drilling fluid is injected through the ports 110 in the side wall of the barrel 11.

In this application embodiment, reset piece 14 is because under the effect of elasticity, with end cap 13 looks butt, thereby end cap 13 shutoff is in relief vent 120, pressure transfer hole 132 is not linked together with the inside of barrel 11, thereby make the inside of barrel 11 and pressure of relief passage 130 different, act on end cap 13 at external force, end cap 13 slides towards the inside of barrel 11, thereby pressure transfer hole 132, pressure release passage 130 and the inside intercommunication of barrel 11 each other, thereby pressure transfer hole 132 has been balanced, pressure release passage 130 and the inside pressure of barrel 11, the pressure of valve plate 12 both sides has been balanced promptly, the pressure that makes valve plate 12 both sides is the same, in this way, valve plate 12 just can inwards open, based on above-mentioned basis, drilling fluid can directly be poured into drilling fluid through the top of barrel 11 or pour into drilling fluid into through interface 110, consequently drilling fluid's injection can not take place to stop, thereby the subsidence of drilling fluid has been avoided.

In some embodiments, as shown in fig. 13, to prevent the plug 13 from sliding in the pressure relief opening 120 and falling out of the pressure relief opening 120, the plug 13 may include a first stop ring 133, a connecting shaft 134, and a second stop ring 135, where the first stop ring 133, the connecting shaft 134, and the second stop ring 135 have circular cross sections along the vertical axis. The first limiting ring 133 is used for abutting one end of the reset piece 14, which is close to the pressure relief opening 120, the first limiting ring 133 is located inside the cylinder 11, and the diameter of the first limiting ring 133 is larger than that of the pressure relief opening 120. One end of the connecting shaft 134 is connected with the first limiting ring 133, the pressure release channel 130 is located inside the connecting shaft 134, the opening 131 is formed in the end face of the connecting shaft 134 far away from the first limiting ring 133, the pressure transmission hole 132 is located on the side wall of the connecting shaft 134, and the connecting shaft 134 penetrates through the pressure release opening 120 and is in sliding fit with the pressure release opening 120. The second limiting ring 135 is mounted on an end of the connecting shaft 134 away from the first limiting ring 133, and the diameter of the second limiting ring 135 is larger than that of the pressure relief opening 120. The first limiting ring 133, the connecting shaft 134 and the second limiting ring 135 are coaxially disposed, and the first limiting ring 133 and the second limiting ring 135 may be screwed or welded on the connecting shaft, which is not specifically limited herein.

In some embodiments, in order to reduce the gap between the plug 13 and the inner wall of the pressure relief opening 120, the plug 13 may further include a sealing ring sleeved outside the connecting shaft 134 and slidably engaged with the inner wall of the pressure relief opening 120, and in addition, in order to facilitate fixing the sealing ring, an annular groove is formed on the outer wall of the connecting shaft 134, and the sealing ring is located in the annular groove, so as to prevent the sealing ring from sliding relative to the connecting shaft 134.

In some embodiments, as shown in fig. 13, for the convenience of pressure relief, a plurality of grooves 136 extending along a radial direction are provided on an end surface of the connecting shaft 134 far from one end of the first limiting ring 133, the grooves 136 are communicated with the opening 131, and the number of the grooves 136 may be four, six or eight, which is not particularly limited in this embodiment of the present application.

In some embodiments, as shown in fig. 5 and 6, to facilitate the assembly and disassembly of the valve plate 12, the connector 10 may further include a joint 150 installed in the interface 110, and the joint 150 may be screwed, snapped, or bolted to the interface 110. Valve plate 12 is rotatably mounted to the end of fitting 150 that extends into port 110 and is deflectable relative to fitting 150 to open and close port 110, i.e., to open and close the internal passage of fitting 150.

In some embodiments, as shown in fig. 7 and 11, to facilitate the installation of the pipe and the joint 150, the connector 10 further includes a adaptor 160 having a hollow structure inside, one end of the adaptor 160 is connected to the joint 150, one end of the adaptor 160 is disposed through the joint 150, the adaptor 160 moves toward the plug 13 under the action of an external force and abuts against the connecting shaft 134, so that the connecting shaft 134 slides in the pressure relief port 120 to communicate with the pressure transfer hole 132 and the interior of the barrel 11, and when the adaptor 160 abuts against the connecting shaft 134 (one end of the plug 13 having the opening 131), the connecting shaft 134 is driven to slide toward the interior of the barrel 11, so that the pressure transfer hole 132 extends into the interior of the barrel 11, so that the interior of the barrel 11 communicates with the pressure transfer hole 132, thereby realizing the internal pressure relief of the barrel 11, so that the pressure difference is balanced, and the valve plate 12 rotates relative to the joint 150, so that the interface 110 is opened, so that the drilling fluid is injected into the joint 150 through the adaptor 160 and then flows into the interior of the barrel 11.

In some embodiments, as shown in fig. 8, to facilitate operation of the adapter 160 in abutment with the connecting shaft 134, the adapter 160 may include a first shaft section 161, a first cone section 162, a second shaft section 163, and a steering wheel 164. One end of the first shaft section 161 communicates with the joint 150. One end of the first cone segment 162 communicates with one end of the first shaft segment 161 remote from the joint 150. One end of the second shaft section 163 communicates with one end of the first cone section 162 remote from the first shaft section 161. The steering wheel 164 is sleeved outside the second shaft section 163. The small diameter end of the first cone section 162 is communicated with the first shaft section 161, the large diameter end of the first cone section 162 is communicated with the second shaft section 163, the first shaft section 161, the first cone section 162 and the second shaft section 163 are coaxially arranged, and the first shaft section 161, the first cone section 162 and the second shaft section 163 can be integrally formed, welded or in threaded connection. As shown in fig. 9, when the first shaft section 161 extends into the joint 150 and gradually moves toward the pressure relief port 120, when the end of the first shaft section 161 abuts against the connecting shaft 134, the connecting shaft 134 moves toward the inside of the cylinder 11, so that the pressure transfer hole 132 communicates with the inside of the cylinder 11, that is, the pressure relief is completed as described above, and the pressure on both sides of the valve plate 12 is balanced, so that the valve plate 12 opens the port 110. As shown in fig. 12, when the first shaft section 161 is far away from the connecting shaft 134, under the elastic force of the restoring member 14, the restoring member 14 abuts against the second limiting ring 133, so that the second limiting ring 133 moves radially outwards of the cylinder 11, and the pressure transmitting hole 132 is located in the pressure releasing opening 120, so that the pressure releasing opening 120 is not communicated with the inside of the cylinder 11, and in addition, the second limiting ring 133 is blocked at the pressure releasing opening 120.

In some embodiments, as shown in fig. 6, in order to facilitate the assembly and disassembly of the adapter 160 and the adapter 150, the inner side wall of the adapter 150 is provided with a plurality of first clamping grooves 151 and second clamping grooves 152 which are mutually communicated, the first clamping grooves 151 and the second clamping grooves 152 are in one-to-one correspondence, an included angle is formed between the extending directions of the first clamping grooves 151 and the second clamping grooves 152, the notch of the first clamping grooves 151 away from the second clamping grooves 152 extends to the end face of the adapter 150, the notch of the second clamping grooves 152 away from the first clamping grooves 151 and the end face of the adapter 150 are spaced, a clamping protrusion (not shown in the drawing) is arranged on the outer side wall of the first shaft section 161, the clamping protrusion slides relative to the first clamping grooves 151 and slides into the second clamping grooves 152, and is abutted against the groove wall of one end of the second clamping grooves 152 away from the first clamping grooves 151, and when the clamping protrusion is clamped into the second clamping grooves 152, the first shaft section 161 is abutted against the plug 13, and accordingly the plug 13 slides in the pressure relief opening 120.

In some embodiments, as shown in fig. 3 and 4, to avoid drilling fluid flowing out of the top of the barrel 11, the connector 10 may further include a connection tube 101, a one-way valve 102, and a sleeve 103. One end of the connecting pipe 101 is communicated with the cylinder 11, and the connecting pipe 101 is positioned above the joint 110. A check valve 102 is installed in the connection pipe 101 for allowing fluid (drilling fluid) to flow into the connection pipe 101 through the check valve 102 in one direction. The sleeve 103 is sleeved outside the connecting pipe 101, and one end of the sleeve 103 close to the cylinder 11 is connected with the cylinder 11. The check valve 102 has a conventional structure, when the valve in the check valve 102 deflects downward, the orifice at the top of the connecting pipe 101 is gradually increased, the orifice at the top of the connecting pipe 101 is gradually opened, when the valve deflects upward, the orifice at the top of the connecting pipe 101 is gradually decreased, the orifice at the top of the connecting pipe 101 is gradually closed, and when the valve abuts against the limiting ring on the inner wall of the connecting pipe 101, the orifice at the top of the connecting pipe 101 is closed by the valve. In addition, the check valve 102 may be directly installed in the cylinder 11 and located at the top of the cylinder 11, which is not described in detail.

The present utility model is not limited to the above embodiments, and any person skilled in the art can easily think about the changes or substitutions within the technical scope of the present utility model, and the changes or substitutions are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. Connecting piece, its characterized in that includes:

the side wall of the cylinder body is provided with an interface communicated with the inside of the cylinder body;

the valve plate is rotatably arranged on the cylinder body and used for opening and closing the interface, the valve plate is used for enabling fluid to flow into the cylinder body through the interface in one way, and a pressure relief opening is formed in the valve plate;

the pressure relief device comprises a plug, a pressure relief opening, a valve plate and a cylinder body, wherein the pressure relief opening is formed in the plug, an opening communicated with the pressure relief opening is formed in one end of the plug, a pressure transmission hole communicated with the pressure relief opening is formed in the side wall of the plug, the plug is arranged in the pressure relief opening in a sliding penetrating mode, the opening is arranged outside the pressure relief opening, and the plug moves towards the valve plate under the action of external force so that the pressure transmission hole is communicated with the inside of the cylinder body;

and one end of the reset piece is connected to the valve plate, the other end of the reset piece is positioned at the pressure relief opening and is abutted to one end of the plug, which is far away from the opening, and the reset piece is used for moving one end, which is close to the reset piece, of the plug towards the pressure relief opening so as to seal the pressure relief opening in a reset state.

2. The connector of claim 1, wherein the plug comprises:

the first limiting ring is used for being abutted with one end of the resetting piece, which is close to the pressure relief opening, and is positioned in the cylinder body, and the diameter of the first limiting ring is larger than that of the pressure relief opening;

one end of the connecting shaft is connected with the first limiting ring, the pressure relief channel is positioned in the connecting shaft, the opening is formed in the end face of one end, far away from the first limiting ring, of the connecting shaft, the pressure transmission hole is formed in the side wall of the connecting shaft, and the connecting shaft penetrates through the pressure relief opening and is in sliding fit with the pressure relief opening;

the second limiting ring is arranged at one end, far away from the first limiting ring, of the connecting shaft, and the diameter of the second limiting ring is larger than that of the pressure relief opening.

3. The connector of claim 2, wherein the plug further comprises:

the sealing ring is sleeved outside the connecting shaft and is in sliding fit with the pressure relief opening.

4. The connector of claim 2, wherein the end surface of the connecting shaft remote from the end of the first stop collar is provided with a plurality of radially extending grooves, and the grooves are in communication with the opening.

5. The connector of claim 4, further comprising:

the joint is arranged in the interface, and the valve plate is rotatably arranged at one end of the joint extending into the interface.

6. The connector of claim 5, further comprising:

the adapter is of a hollow structure, one end of the adapter is communicated with the adapter, one end of the adapter is arranged in the adapter in a penetrating mode, the adapter moves towards the plug under the action of external force and is abutted to the connecting shaft, the connecting shaft slides in the pressure relief opening, and therefore the pressure transmission hole is communicated with the inside of the cylinder body.

7. The connector of claim 6, wherein the adapter comprises:

a first shaft section, one end of which is communicated with the joint;

one end of the first cone section is communicated with one end of the first shaft section, which is far away from the joint;

one end of the second shaft section is communicated with one end of the first cone section far away from the first shaft section;

and the steering wheel is sleeved outside the second shaft section.

8. The connector of claim 7, wherein the inner side wall of the connector is provided with a plurality of first clamping grooves and second clamping grooves which are mutually communicated, the first clamping grooves are in one-to-one correspondence with the second clamping grooves, an included angle is formed between the extending directions of the first clamping grooves and the second clamping grooves, the notch of the first clamping grooves, which is far away from the second clamping grooves, extends to the end face of the connector, the notch of the second clamping grooves, which is far away from the first clamping grooves, is spaced from the end face of the connector, a clamping protrusion is arranged on the outer side wall of the first shaft section, slides into the second clamping grooves relative to the first clamping grooves, and is in butt joint with the groove wall of one end, which is far away from the first clamping grooves, of the second clamping grooves.

9. The connector according to any one of claims 1-8, further comprising:

one end of the connecting pipe is communicated with the cylinder body, and the connecting pipe is positioned above the interface;

a check valve installed in the connection pipe for allowing fluid to flow into the connection pipe through the check valve in one direction;

and the sleeve is sleeved outside the connecting pipe, and one end of the sleeve, which is close to the cylinder body, is connected with the cylinder body.

10. Drilling derrick, characterized by comprising:

the connector of any one of the preceding claims 1-9;

at least one drill string, one end of which is arranged at the bottom of the cylinder and communicated with the inside of the cylinder;

the drill floor is arranged on the ground;

the derrick is arranged on the drill floor, and the drill string is rotationally connected with the derrick;

the three-way valve is provided with an inlet, a first outlet and a second outlet, the first outlet is communicated with the top of the cylinder body through a pipeline, and the second outlet is communicated with the interface through a pipeline.

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