CN-224214154-U - Novel plug valve for blowout prevention meter reading of drilling and repairing tubular column

CN224214154UCN 224214154 UCN224214154 UCN 224214154UCN-224214154-U

Abstract

The utility model discloses a novel plug valve for a blowout-preventing meter reading of a drilling and repairing tubular column, which comprises a plug valve body, a plug valve core and limiting steering blocks, wherein the plug valve core is arranged below an upper valve seat in threaded connection with the plug valve body through the two limiting steering blocks, a meter reading pressure relief joint which is communicated with a central hole of the plug valve body and provided with a one-way valve core is arranged in a lower body of the plug valve body, and the meter reading pressure relief joint can be connected with a pressure meter or a pressure relief needle valve through a clamping tenon and is used for reading pressure in a construction tubular column or relieving pressure of the construction tubular column. The plug valve is simple in structure, safe and reliable in operation, convenient and quick to assemble and disassemble, and convenient to operate, and a plurality of auxiliary tools can be used during assembly and disassembly. The plug valve has the advantages that the plug valve is safe and reliable in operation, multiple functions are realized, and the labor intensity and the construction efficiency of workers are effectively reduced. The blowout prevention effect of the plug valve is effectively improved, the use effect is obvious, and good economic benefits can be generated.

Inventors

GAO YANWEN
LI BIN
JIANG XIAO
YANG BIN
LI BOQUN

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司胜利油田分公司

Dates

Publication Date: 20260508
Application Date: 20250627

Claims (10)

1. A novel plug valve for a blowout-preventing meter reading of a drilling and repairing tubular column comprises a plug valve body, a plug valve core and limiting steering blocks, and is characterized in that the plug valve core is arranged below an upper valve seat in threaded connection with the plug valve body through the two limiting steering blocks, a meter reading pressure relief connector which is communicated with a central hole of the plug valve body and provided with a one-way valve core is arranged in a lower body of the plug valve body, and the meter reading pressure relief connector can be connected with a pressure meter or a pressure relief needle valve through a clamping tenon and used for reading pressure in a construction tubular column or relieving pressure for the construction tubular column.
2. The novel plug valve for the blowout prevention and reading of the drilling and repairing tubular column is characterized in that an inner circle of a plug valve body is a non-equal-diameter inner circle and is a blowout prevention component connecting cavity, an upper valve seat connecting cavity, a lower valve seat, a central hole and a drainage cavity from top to bottom, a limiting steering block mounting hole is formed in a body wall between the upper valve seat connecting cavity and the lower valve seat, internal threads are formed in the blowout prevention component connecting cavity and the upper valve seat connecting cavity of the plug valve body, external threads are formed in an outer circle of the plug valve body at the drainage cavity, the external threads at the blowout prevention component connecting cavity and the drainage cavity in the plug valve body can be in threaded connection with a well control pipeline and a tubular column coupling respectively, and the internal threads in the upper valve seat connecting cavity are airtight threads.
3. The novel plug valve for blowout prevention and meter reading of drilling and repairing pipe columns, which is disclosed in claim 2, is characterized in that the outer circle of the plug valve body is a non-equal diameter outer circle, the outer diameter of the lower part connected with an oil pipe coupling is smaller than the outer diameter of the upper part, more than two stress application rod jacks are arranged on the outer circle below the blowout prevention part connecting cavity, the limit steering block mounting holes are symmetrically arranged on two sides of the plug valve body between the upper valve seat connecting cavity and the lower valve seat, and the two limit steering block mounting holes are all stepped holes with small outer part and large inner part.
4. The novel plug valve for blowout prevention meter reading of drilling and repairing tubular column as set forth in claim 3, wherein two limit steering blocks are installed in opposite directions and symmetrically in the limit steering block installation hole and connected with a plug valve core.
5. The plug valve for the blowout-preventing meter reading of the novel drilling and repairing tubular column according to claim 4, wherein one end outer circle of each of the two limiting steering blocks is a stepped outer circle corresponding to a mounting hole of the limiting steering block, an inner rotating square is arranged at the outer end part of the stepped outer circle, square block bodies matched with connecting grooves of plug valve cores are arranged at the other ends of the two limiting steering blocks, the square block bodies in the two limiting steering blocks are connected in the connecting grooves of the plug valve cores in a facing manner, and a sealing rubber ring is arranged between the outer surfaces of the square block bodies in the two limiting steering blocks and the connecting grooves of the plug valve cores.
6. The plug valve for the blowout prevention meter reading of the novel drilling and repairing tubular column according to claim 5, wherein a rotation direction is arranged on the outer circle of a plug valve body below the limit steering block mounting hole, and the meter reading pressure release connector is arranged in a quick connector connecting hole in the plug valve body below the rotation direction.
7. The plug valve for blowout prevention and meter reading of the novel drilling and repairing tubular column is characterized in that the quick connector connecting hole is a convex hole with small inside and large outside, internal threads in the small hole diameter can be in threaded connection with a meter reading and pressure releasing connector, a pressure meter connector or a body of a pressure releasing needle valve of a pressure meter connected with a connecting clamping tenon in the meter reading and pressure releasing connector can be installed in the large hole diameter at the outer side of the quick connector connecting hole, and the meter reading and pressure releasing connector is a high-pressure self-locking quick connector.
8. The plug valve for the blowout-preventing meter reading of the novel drilling and repairing tubular column according to claim 5, wherein the lower valve seat is an arc-shaped inner cavity which is arranged below the installation hole of the limiting steering block and is positioned around the central hole of the plug valve body, the upper valve seat is a tubular body with an outer thread arranged at the lower part, the central hole of the upper valve seat is larger than the central hole of the plug valve body, an anti-corrosion layer is arranged outside the arc surface of the arc-shaped inner cavity at the lower part of the upper valve seat, and the arc-shaped inner cavities of the upper valve seat and the lower valve seat are both in accordance with the appearance of a plug valve core.
9. The plug valve for blowout prevention meter reading of novel drilling and repairing tubular column as set forth in claim 8, wherein the plug valve core is a sphere with a flow center hole, and the connecting grooves are arranged on two sides of the sphere of the plug valve core and are through grooves perpendicular to the flow center hole.
10. The plug valve for the blowout prevention meter reading of the novel drilling and repairing tubular column according to claim 9, wherein the inner diameter of a liquid flow center hole in the plug valve core is smaller than the inner diameter of an upper valve seat and is the same as the aperture of a center hole below a lower valve seat in the plug valve body.

Description

Novel plug valve for blowout prevention meter reading of drilling and repairing tubular column Technical Field The utility model relates to a blowout preventer in a drilling and repairing pipe column in the petroleum industry, in particular to a novel plug valve for a blowout prevention reading meter of a drilling and repairing pipe column. Background With the development of offshore oil fields, the development force of the offshore productivity is increased year by year, the offshore drilling and repairing workload is increased, and the number of annual drilling and repairing wells is increased year by year. The construction of drilling and workover involves all the horizons of the offshore hydrocarbon reservoir. In recent years, in order to protect the environment, the requirements on safety and environmental protection are very strict, and laws and regulations on offshore well control are increasingly perfected and stringent. For example, in the process of drilling and repairing, the stop clearances of a tripping pipe column, filling liquid and the like are all required to be provided with a plug valve at the position of an upper end joint hoop of the pipe column, so that a hydraulic ram blowout preventer is required to be closed, and a pressure gauge stand and a pressure gauge are required to be arranged at the upper end of a plug valve body, thereby increasing construction procedures and operation. Meanwhile, the pressure is recorded before the pressure gauge is dismantled, the pressure release jackscrew of the pressure gauge seat is loosened, and the pressure gauge seat is dismantled, so that the operation is complex and the time is long. In the construction process of drilling and repairing the well, when overflow occurs at the wellhead, the plug valve is required to be installed at the upper end joint hoop of the construction pipe column in a robbing way, and then the hydraulic ram blowout preventer or hydraulic annular blowout preventer is required to be closed, and the wellhead plug valve is required to be closed again. A traditional plug valve is characterized in that a spanner is inserted into a limit knob on one side of a valve body, a valve core is rotated to close a pipe column inner channel in a well, after the upper part of the plug valve is connected with a construction pipeline, the spanner of the plug valve is inserted into the limit knob on one side of the valve body, and the valve core is reversely rotated to open the pipe column inner circulation channel in the well. At this time, if the valve core of the plug valve is pushed up by pressure in the circulation channel in the well tubular column, the rotation friction of the valve core of the plug valve is increased, and the operation of rotating the valve core of the plug valve is difficult. The traditional method is that a force lever sleeved on a plug valve spanner is used for rotation, if the pressure in a well is high, the rotation friction of a plug valve core is continuously increased, and the moment of the force lever cannot overcome the high friction of the plug valve core rotation, then a liquid flow channel of the plug valve cannot be opened. Over time, the risk of loss of control of the blowout is highlighted by the continued increase in pressure in the well. At the moment, the stress application lever is used for opening the plug valve, and the defects that the value of the pressure in the well cannot be judged, the later well killing operation is influenced and the like exist. In order to solve the above-described problems, the following related patent technologies have appeared: The low-torsion plug valve and the internal blowout preventer disclosed by the patent application number CN201720854990.4 comprise an upper valve seat, a lower valve seat and a valve plug arranged between the upper valve seat and the lower valve seat, wherein the upper valve seat, the lower valve seat and the valve plug are internally provided with inner through holes which are sequentially communicated and used for fluid to pass through, the valve plug is rotationally connected with the upper valve seat and the lower valve seat, an outer valve rod which extends out of the valve body is connected with the valve plug and drives the valve plug to rotate through the outer valve rod, a spring is arranged between the valve body and the upper valve seat and/or the lower valve seat, and the expansion direction of the spring is consistent with the extension direction of the inner through holes. Said invention can not release pressure in the pipe column below valve seat, and can not conveniently read pressure in the pipe column below valve seat. Therefore, the technical requirements of offshore and land well control and daily production cannot be met. The patent application number CN200720081563.3 discloses a drilling blowout-preventing double-knob plug valve, which comprises a valve body, an upper valve seat, a lower valve seat, a double-knob valve core,