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Automatic-control casing valve

A technology of casing valve and casing shorting, which is applied in the direction of wellbore/well valve device, wellbore/well parts, earthwork drilling and production, etc. It can solve the problems of oil pipeline deformation and troublesome installation and operation, and achieve the goal of installation and operation. Simple, troublesome installation and operation, safe and reliable drilling operation

Inactive Publication Date: 2012-06-13
CNPC GREATWALL DRILLING ENG
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AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing casing valves, which are troublesome to install and operate in the well and easy to deform with the oil pipeline

Method used

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Embodiment Construction

[0022] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 As shown, an automatic control casing valve, the casing valve is connected with the technical casing 2 in the downhole to form a casing string, and its depth can be located within the depth of the surface casing 1 or outside the depth of the surface casing 1 anywhere; the sleeve valve is composed of a non-magnetic sleeve short-connection assembly 3 and a sleeve valve main assembly 4, the non-magnetic sleeve short-connection assembly 3 is arranged on the sleeve valve main body assembly 4 and passed through the technical The bushing 2 is connected with the cable; the bushing valve main assembly 4 includes the bushing joint nipple 5, the eccentric outer cylinder 7, the connecting sleeve 10 and the lower eccentric joint 12, the bushing joint nipple 5, the eccentric outer cylinder 7, the connection The sleeve 10 and the lower eccentric joint 12 are screwed sequentially from top to bottom. A pist...

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Abstract

The invention relates to the technical field of petroleum engineering underbalance drilling, in particular to an automatic-control casing valve. The casing valve is composed of a non-magnetic casing pup joint assembly and a casing valve main body assembly, a piston barrel is arranged in an eccentric outer barrel of the casing valve main body assembly, the lower end of the eccentric outer barrel is connected with a valve seat through a tiepiece and a tiepiece bolt, the valve seat fastens a rib plate through a rib plate bolt, and a shaft pin enables the rib plate and a torsion spring to be in series connection with a valve plate. An electronic device cavity and a hydraulic driving cavity are respectively arranged on the outer side of a thick pipe wall of the eccentric outer barrel, a pressure sensor is installed at the lower end of the valve seat, an axial wire passing channel is arranged between the pressure sensor and the electronic device cavity, one side of the lower end of the valve seat is provided with a permanent locking mechanism, and the non-magnetic casing pup joint assembly comprises an excitation coil circuit, a detection coil circuit, a non-magnetic casing pup joint and an antenna transceiving circuit. The automatic-control casing valve is simple and convenient to install and operate, and overcomes the shortcomings that installation operation of an existing casing valve in the well is troublesome and an oil pipe line deforms easily.

Description

Technical field: [0001] The invention relates to the technical field of petroleum engineering underbalanced drilling, in particular to an automatic control casing valve. Background technique: [0002] At present, the casing valves used in underbalanced drilling are basically divided into two parts: downhole casing valves and surface hydraulic control systems. The surface hydraulic control systems mainly include hydraulic control cabinets and hydraulic cable reels. The two hydraulic oil pipelines of the hydraulic control cabinet on the ground are connected to the main body of the downhole casing valve through the hydraulic cable reel. When the casing valve switch operation is required, the operator can make the downhole casing The valve performs the corresponding switch operation. Due to the existence of the hydraulic tubing and cable reel, it is very troublesome to operate the existing casing valve on site, and the nearly kilometer-long oil pipeline is easily deformed durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/08
Inventor 吴智中
Owner CNPC GREATWALL DRILLING ENG
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