Capsule type cable control head

A technology for controlling heads and capsules, which is applied in wellbore/well parts, earthwork drilling, sealing/package, etc. It can solve problems such as complicated procedures, affecting construction progress, and affecting sealing effects, so as to prevent environmental pollution and benefit Environmental protection, simple structure effect

CN102213082AInactive Publication Date: 2011-10-12承德市开发区富泉石油机械有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-10-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a capsule type cable control head, which comprises an internal capsule, an intermediate capsule and an external capsule, wherein the internal capsule, the intermediate capsule and the external capsule sequentially seal and wrap a cable from inside to outside; the external capsule is sealed and wrapped by a control head main body; and the control head main body is connected with a hydraulic bent joint and sealed by threads. The capsule type cable control head is a well head anti-blowout tool for an oil field. The tool is used for controlling the cable to enter a well and lift from the well in petroleum cable operation, and particularly controlling a fluid pressure in a special situation that a well head is required to be emergently closed after the cable enters the well, so a well blowout accident is effectively prevented, and construction safety is guaranteed. By interaction of the external capsule, the intermediate capsule and the internal capsule, the cable is sealed by radially pushing a capsule body under a hydraulic control pressure, so the cable can smoothly enter the well, and the dynamic sealing of the cable in a lifting and descending process can be realized. The capsule type cable control head has the characteristics of simple structure, small volume, light weight, convenience for use and maintenance, safety, reliability, economy and practicability, and is ideal equipment for preventing environmental pollution in pressurized cable operation in the oil field.
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Description

technical field

[0001] The invention relates to a wellhead blowout prevention tool for an oil field, in particular to a capsule type cable control head. Background technique

[0002] Construction safety is an important condition for oilfield development. Whether it is drilling, cable or tubing transmission, perforation, logging and other construction operations, the preparation of wellhead control equipment is very important to ensure safety and successful production. At present, there are two types of cable control heads used in oil fields: packing type and filling type. The main principle is to squeeze the packing by manually adjusting the upper sealing pressure cap or relying on the force of the hydraulic piston to push the packing to fill from the axial direction. The material achieves the effect of sealing the wellhead cable. However, due to the axial extrusion of the packing, the deformation of the packing will be uneven, resulting in a rapid decrease in the sealing s...

Examples

Embodiment Construction

[0020] Below in conjunction with accompanying drawing, further illustrate the present invention through embodiment.

[0021] Such as figure 1 As shown, the capsule type cable control head of the present invention includes an inner capsule 1 and a middle capsule 2 with two half-split structures that seal and wrap the cable sequentially from the inside to the outside, and the outer capsule 3 uses an integral control head body 4 through a The nuts 6 of the symmetrical lifting ring screws 5 are connected to achieve airtight wrapping, and the control head main body 4 is connected with a hydraulic bend joint 7 through a threaded seal, and the hydraulic bend joint 7 can be connected with a hydraulic pipe through a quick joint 8 to realize capsule sealing. The connection between the cable control head and the hydraulic pressure; the two ends of the inner capsule 1 are provided with two half-split copper pads 9 to support and reduce wear; the two ends of the two half-split middle capsu...