Simple pressure control circulating system for well drilling in high-temperature area
By optimizing the simple pressure control circulation system for drilling in high-temperature areas, the problems of blowout and thermal reservoir pollution during drilling are solved, and well control and economic improvements are achieved.
Patent Information
- Application Number
- CN202422479757.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-14
AI Technical Summary
During drilling in high-temperature areas, the prior art prevents blowouts by increasing the solid phase and density of the drilling fluid system, leading to the problem of thermal reservoir pollution.
A simple pressure control circulation system for drilling in high-temperature areas is designed, including casing heads, wellhead safety valves, four-way, well pressure pipe clusters, throttling pipe clusters, double-gate blowout preventers, rotary blowout preventers and drilling mud pumps. By optimizing pipeline connections and valve control, effective well control and blowout prevention are achieved.
It effectively prevents blowouts during drilling, avoids thermal reservoir pollution, reduces drilling costs, and improves economicality.
Smart Images
Figure CN223190389U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of simple pressure-controlled circulation systems for drilling in high-temperature areas, and relates to a simple pressure-controlled circulation system for drilling in high-temperature areas. Background Art
[0002] Drilling fluid, often called the "blood" of drilling, carries cuttings, cleans the bottom of the well, cools and lubricates the drill bit and drill string, transmits hydraulic power, balances formation pressure, and prevents blowouts. Well ZK401 faced a significant risk of blowout during drilling. Traditionally, increasing the solids content and density of the drilling fluid system to balance formation pressure and prevent vaporization of the circulating fluid has been employed to prevent blowouts. However, this approach can lead to severe thermal reservoir contamination. Summary of the Invention
[0003] The purpose of the utility model is to provide a simple pressure-controlled circulation system for drilling in high-temperature areas to solve the problems raised in the above-mentioned background technology.
[0004] The purpose of the utility model can be achieved through the following technical solutions: a simple pressure-controlled circulation system for drilling in high-temperature areas, comprising a casing head, a wellhead safety valve fixedly installed on the top of the casing head, a four-way valve fixedly installed on the top of the wellhead safety valve, a well-killing manifold fixedly installed on one side of the four-way valve, a throttle manifold fixedly installed on the other side of the four-way valve, a double-gate blowout preventer fixedly installed on the top of the double-gate blowout preventer, a rotary blowout preventer fixedly installed on the top of the rotary blowout preventer, an overflow prevention pipe fixedly installed on the top of the rotary blowout preventer, a drilling mud pump connected to the output end pipeline of the drilling mud pump with a drilling fluid tank, a drilling fluid tank pipeline connected to a cooling pool, a cooling pool pipeline connected to a sand settling tank, and the sand settling tank connected to the rotary blowout preventer and the throttle manifold pipeline.
[0005] In the above-mentioned simple pressure-controlled circulation system for drilling in high-temperature areas, a first system valve is fixedly installed in the pipeline between the rotary blowout preventer and the sand settling tank.
[0006] In the above-mentioned simple pressure-controlled circulation system for drilling in high-temperature areas, second system valves are fixedly installed at the connections between the four-way valve and the well-killing manifold and the throttle manifold.
[0007] In the above-mentioned simple pressure-controlled circulation system for drilling in high-temperature areas, a throttling manifold regulating valve is fixedly installed at the end of the throttling manifold.
[0008] In the above-mentioned simple pressure-controlled circulation system for drilling in high-temperature areas, a valve control switch is fixedly provided on the side of the wellhead safety valve.
[0009] In the above-mentioned simple pressure-controlled circulation system for drilling in high-temperature areas, a sealing ring is provided at the connection between the wellhead safety valve and the casing head.
[0010] Compared with the existing technology, the advantages of the simple pressure-controlled circulation system for drilling in high-temperature areas in the utility model are: the pressure-controlled circulation system can effectively prevent the problem of blowout during drilling, thereby avoiding the problem of thermal reservoir pollution, has good economy, and reduces drilling costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The utility model is a structural schematic diagram of a simple pressure-controlled circulation system for drilling in high-temperature areas.
[0012] In the figure, 1. casing head; 2. wellhead safety valve; 3. cross-connection valve; 4. double-gate blowout preventer; 5. rotary blowout preventer; 6. overflow prevention pipe; 7. well kill manifold; 8. choke manifold; 9. drilling mud pump; 10. drilling fluid tank; 11. cooling tank; 12. sand settling tank. DETAILED DESCRIPTION
[0013] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0014] like Figure 1 As shown, the utility model is a simple pressure control circulation system for drilling in high-temperature areas, including a casing head 1, a wellhead safety valve 2 is fixedly installed on the top of the casing head 1, a four-way valve 3 is fixedly installed on the top of the wellhead safety valve 2, a well-killing manifold 7 is fixedly installed on one side of the four-way valve 3, a throttle manifold 8 is fixedly installed on the other side of the four-way valve 3, a double-gate blowout preventer 4 is fixedly installed on the top of the double-gate blowout preventer 4, a rotary blowout preventer 5 is fixedly installed on the top of the rotary blowout preventer 5, an overflow prevention pipe 6 is fixedly installed, the overflow prevention pipe 6 and the well-killing manifold 7 are connected to a drilling mud pump 9 through a pipeline, the output end pipeline of the drilling mud pump 9 is connected to a drilling fluid tank 10, the drilling fluid tank 10 is connected to a cooling pool 11 through a pipeline, the cooling pool 11 is connected to a sand settling tank 12 through a pipeline, and the sand settling tank 12 is connected to the rotary blowout preventer 5 and the throttle manifold 8 through a pipeline.
[0015] Specifically, the pressure-controlled circulation system can effectively prevent blowout during the drilling process, thereby avoiding the problem of thermal reservoir pollution, having good economic efficiency and reducing drilling costs.
[0016] like Figure 1 As shown, the utility model is a simple pressure control circulation system for drilling in high temperature areas, and a first system valve is fixedly installed in the pipeline between the rotary blowout preventer 5 and the sand settling tank 12.
[0017] The second system valves are fixedly installed at the connections between the four-way valve 3, the well-killing manifold 7 and the choke manifold 8.
[0018] A throttle manifold regulating valve is fixedly installed at each end of the throttle manifold 8 .
[0019] A valve control switch is fixedly provided on the side of the wellhead safety valve 2.
[0020] A sealing ring is provided at the connection between the wellhead safety valve 2 and the casing head 1. Specifically, the sealing performance of the connection between the wellhead safety valve 2 and the casing head 1 is improved by providing the sealing ring.
[0021] In specific implementation, the pressure control circulation system is centered on the wellhead device consisting of a rotary blowout preventer 5 and a double-gate blowout preventer 4. The automatic control throttle manifold 8 is optimized to a conventional throttle manifold 8, and the back pressure pump is optimized to a combination of a well kill manifold 7, a throttle manifold 8 and a drilling mud pump 9. It is supplemented by a control system consisting of a remote control console model FK480-5 and a driller's console, which can meet the well control requirements under various working conditions during the drilling construction of high-temperature geothermal wells.
[0022] Matters not described in detail in this specification constitute prior art known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art to which the present invention relates may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
Claims
1. A simple pressure-controlled circulation system for drilling in high-temperature areas, comprising a casing head (1), characterized in that: A wellhead safety valve (2) is fixedly mounted on the top of the casing head (1), a four-way valve (3) is fixedly mounted on the top of the wellhead safety valve (2), a well-killing manifold (7) is fixedly mounted on one side of the four-way valve (3), a throttle manifold (8) is fixedly mounted on the other side of the four-way valve (3), a double-gate blowout preventer (4) is fixedly mounted on the top of the double-gate blowout preventer (4), a rotary blowout preventer (5) is fixedly mounted on the top of the rotary blowout preventer (5), and a double-gate blowout preventer (4) is fixedly mounted on the top of the rotary blowout preventer (5). An overflow prevention pipe (6) is fixedly installed at the top of the blowout preventer (5); the overflow prevention pipe (6) and the well-killing manifold (7) are connected to a drilling mud pump (9); the output end pipeline of the drilling mud pump (9) is connected to a drilling fluid tank (10); the drilling fluid tank (10) pipeline is connected to a cooling pool (11); the cooling pool (11) pipeline is connected to a sand settling tank (12); the sand settling tank (12) is connected to the rotary blowout preventer (5) and the throttling manifold (8) pipeline.
2. A simple pressure-controlled circulation system for drilling in high-temperature areas according to claim 1, characterized in that: A first system valve is fixedly installed in the pipeline between the rotary blowout preventer (5) and the sand settling tank (12).
3. The simple pressure-controlled circulation system for drilling in high-temperature areas according to claim 1, characterized in that: The connection points between the four-way valve (3), the well-killing manifold (7) and the throttle manifold (8) are all fixedly installed with second system valves.
4. A simple pressure-controlled circulation system for drilling in high-temperature areas according to claim 1, characterized in that: A throttling manifold regulating valve is fixedly installed at the end of the throttling manifold (8).
5. The simple pressure-controlled circulation system for drilling in high-temperature areas according to claim 1, characterized in that: A valve control switch is fixedly provided on the side of the wellhead safety valve (2).
6. A simple pressure-controlled circulation system for drilling in high-temperature areas according to claim 5, characterized in that: A sealing ring is provided at the connection between the wellhead safety valve (2) and the casing head (1).