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Integrated oil casing head

An oil-casing, integral technology, applied in the field of integral oil-casing head, can solve the problems of time-consuming, cost, safety risk, etc.

Active Publication Date: 2012-01-18
BAOJI PETROLEUM MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an integral oil casing head, which solves the need to re-test the pressure of the blowout preventer group and the ground facilities in the prior art, which takes time and cost, and compares the safety risks when changing the wellhead. big problem

Method used

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Embodiment Construction

[0018] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0019] Such as figure 1 As shown, the structure of the wellhead device of the present invention includes a bracket 2 welded to the upper port of the catheter 1. The upper end of the bracket 2 is kept in contact with the body 4 of the wellhead device through a clamp block. The inner cavity of the body 4 is provided with three steps, from below From the top, there are the technical casing hanger step 8, the pressure test step 11, and the tubing hanger step 13. The main body 4 is provided with a flat head screw 16, two sets of side diameter holes 7, and a top Wire 10 and two pressure test holes 33; the inner circumference of the lower section of the body 4 is covered with a surface casing 6, and the lower end of the body 4 is equipped with an inverted slip 3, which is used to hang the surface casing 6, and the inverted slip 3 The circle is tightly sleeved with th...

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Abstract

The invention discloses an integrated oil casing head. The integrated oil casing head comprises a carrier welded to the upper port of a conduit, the upper end of the carrier keeps contact with the body of a wellhead assembly through a clamping block, the inner cavity of the body is provided with three steps from bottom to top, namely technical casing hanger step, a pressure test step and an oil pipe hanger step, the body is provided with a flat head jackscrew, two groups of side drift diameter holes, a jackscrew and two pressure test holes in sequence from top to bottom along the radial direction, and the upper end of the body is connected with a christmas tree cover plate flange. Once the integrated oil casing head is installed, well drilling, well cementing and well testing well completion special operations such as underground pressure test, well cleaning, fracture acidizing and the like can be completed without replacing the wellhead assembly and changing ground facilities, therefore time and cost for lifting and placing drilling tools or tubing strings, replacing a wellhead and testing pressure can be reduced, and the risk caused by the absence of a blowout preventer assembly can be avoided during the replacement of the wellhead.

Description

Technical field [0001] The invention belongs to the technical field of oil drilling equipment and relates to an integral oil casing head. Background technique [0002] A complete set of wellhead equipment and Christmas tree is mainly composed of three parts: casing head, tubing head and oil (gas) tree. When drilling, install the blowout preventer on the upper part of the casing head to form a wellhead device; when completing the well, install the oil (gas) tree above the tubing head to form an oil (gas) wellhead device. Among them, the role of the casing head is to connect the surface casing, suspend the multi-layer casing in the well, and seal the annular space between the casing and the casing; the main function of the tubing head is to suspend the tubing and seal the gap between the tubing and the casing. Annular space; the main function of the Christmas tree is to switch, control and guide the oil flow and seal the oil pipe. The entire device needs to meet special operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04
Inventor 胥志雄张斌康延军肖力彤彭建新刘义石希天杨晓峰李怀忠张浩刘会良李峰秦世宽
Owner BAOJI PETROLEUM MASCH CO LTD
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