Wellhead Backpressure Control System and Wellhead Backpressure Control Method for Managed Pressure Drilling

A technology of managed pressure drilling and control system, which is applied to the automatic control system of drilling, drilling equipment, wellbore/well components, etc. The problem of high cost of the pressure pump can achieve the effect of removing high failure factors, simplifying pressure control equipment, and reducing the number of valves.

Active Publication Date: 2015-10-21
CHINA UNIV OF PETROLEUM (BEIJING) +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a wellhead back pressure control system and a wellhead back pressure control method for managed pressure drilling to solve the problem of many faults caused by relying on a back pressure pump to complete the wellhead back pressure
The present invention can also solve the problem that the back pressure pump system occupies a large area
The invention can also solve the problems of high cost and inconvenient operation of using the back pressure pump
The invention can also solve the problem that the back pressure pump system cannot work for a long time during the grouting operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wellhead Backpressure Control System and Wellhead Backpressure Control Method for Managed Pressure Drilling
  • Wellhead Backpressure Control System and Wellhead Backpressure Control Method for Managed Pressure Drilling
  • Wellhead Backpressure Control System and Wellhead Backpressure Control Method for Managed Pressure Drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0037] Such as Figure 4 As shown, the wellhead back pressure control system of managed pressure drilling according to the embodiment of the present invention includes:

[0038] A mud pump 1, the mud pump has an inlet and an outlet, the inlet is connected to the mud pool 8, and the outlet is connected to the riser;

[0039] Pressure control automatic choke manifold (also called automatic choke manifold or control drilling choke manifold) 4, the pressure control automatic choke manifold has port A and port C, the pressure control automatic choke manifold The port A of the rotary blowout preventer 3 is connected to the main bypass port of the rotary blowout preventer 3, and the pressure control automatic throttle manifold also has...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a wellhead back pressure controlling system of managed pressure drilling and a wellhead back pressure controlling method. The wellhead back pressure controlling system of the managed pressure drilling comprises a slush pump, a managed pressure automatic choke manifold, a liquid-gas separator, a slush pool, a rotary blowout preventer and a slush diversion manifold system, wherein the slush pool is respectively connected with the slush pump, the managed pressure automatic choke manifold and the liquid-gas separator. The slush diversion manifold system comprises a branch path I, a branch path II, a branch path III, a branch path IV and a branch path V, wherein the branch path I, the branch path II, the branch path III and the branch path IV are connected through a cross t3, the branch path V is connected with the branch path II through a tee t5, and the branch path V and the branch path IV are connected through a tee t8. The wellhead back pressure controlling system of the managed pressured drilling is adopted by the wellhead back pressure controlling method. The slush diversion manifold system replaces a back pressure pump system, operational cost is reduced, a site area is saved, and high-fault factors are removed.

Description

technical field [0001] The invention relates to the field of drilling for petroleum exploration and development, in particular to a wellhead back pressure control system and a wellhead back pressure control method for managed pressure drilling. Background technique [0002] In oil and gas development, more and more operations are performed in complex formations. Generally, the difference between collapse pressure and fracture pressure in complex formations is small or the safe density window of mud is narrow, and blowout, leakage, sticking and collapse accidents are often encountered when conventional drilling technology is used. In order to carry out drilling operations safely and reduce accidents, managed pressure drilling technology is often used. One of the methods of MPD technology is to indirectly control the bottom hole pressure by controlling the wellhead back pressure. One of its core technologies and equipment is the pressure-controlled automatic choke manifold. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/08E21B44/00
Inventor 张涛李军柳贡慧何淼
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products