Device for replacing rubber core of rotary blowout preventer in pressure control state of pressure control well drilling
A technology of rotating blowout preventer and managed pressure drilling, which is applied in earth-moving drilling, wellbore/well components, etc., can solve problems such as stopping pressure control, and achieve the effect of reasonable structure and convenient use.
Active Publication Date: 2015-04-08
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0003]The present invention provides a device for replacing the rubber core of the rotary blowout preventer under the pressure control state in managed pressure drilling, which overcomes the above-mentioned deficiencies in the prior art, and can Effectively solve the current problem of stopping pressure control when replacing the rubber core of the rotary blowout preventer in the process of managed pressure drilling
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[0010] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.
[0011] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 For example, the positional relationship of top, bottom, left, right, etc. is determined according to the layout direction of the drawings in the specification.
[0012] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:
[0013] as attached figure 1 As shown, the device for replacing the rubber core of the rotary blowout preventer in the controlled pressure state in the managed pressure drilling includes the rotary blowout preventer 1, the wellbore 3, the internal control pipeline 5 of the we...
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The invention relates to the technical field of pressure control well drilling and relates to a device for replacing a rubber core of a rotary blowout preventer in a pressure control state of pressure control well drilling. The device comprises the rotary blowout preventer, a shaft, a drilling crew internal-control pipeline, a drilling crew throttle manifold, an automatic throttle manifold and a back pressure pump. An annular blowout preventer is fixedly mounted below the rotary blowout preventer, a ram blowout preventer is fixedly mounted between the annular blowout preventer and the shaft, the drilling screw internal-control pipeline is fixedly mounted on the shaft, the other end of the drilling crew internal-control pipeline and the drilling crew throttle manifold are fixedly mounted together, and a first connecting pipeline is fixedly mounted on the rotary blowout preventer. The device is reasonable and compact in structure and convenient to use, the rubber core of the rotary blowout preventer can be replaced in the pressure control state of the pressure control well drilling by the device, requirement for stopping pressure control is omitted, the problem that the downhole pressure temporarily stays in a non-constant state if pressure control is stopped is avoided, and drilling safety is ensured.
Description
technical field [0001] The invention relates to the technical field of pressure-controlled drilling, and relates to a device for replacing the rubber core of a rotary blowout preventer in a pressure-controlled state in the managed-pressure drilling. Background technique [0002] Managed pressure drilling (MPD) technology is a new type of drilling technology, which can precisely control the annular pressure of the wellbore and safely drill through pressure-sensitive formations, so it is gradually favored by domestic oil fields. In the process of managed pressure drilling, if the rubber core of the rotary blowout preventer needs to be replaced, the only way to temporarily stop the pressure control is to stop compensating the back pressure to the annular space in the well. complex. Contents of the invention [0003] The invention provides a device for replacing the rubber core of the rotary blowout preventer under the pressure control state in the managed pressure drilling, ...
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IPC IPC(8): E21B23/00
CPCE21B23/00
Inventor 伊明张伟李润川陆忠梅杨洪黄学刚
Owner BC P INC CHINA NAT PETROLEUM CORP