Apparatus and method for controlling wellbore pressure
A wellbore pressure and pressure technology, applied in the field of wellbore pressure control equipment, can solve problems such as occupancy, well collapse, and drill bit pressure drop reduction
Active Publication Date: 2017-12-12
CHINA PETROCHEMICAL CORP +1
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Problems solved by technology
[0009] As mentioned above, there are the following problems in the prior art: first, the tools used to control the wellbore pressure in the prior art can only affect the bottom hole pressure, and cannot achieve unified and overall control in the longitudinal direction of the wellbore; secondly, The tools used to control the wellbore pressure in the prior art need to occupy the limited available circulation pressure of the drilling equipment, which will inevitably cause the reduction of the pressure drop of the drill bit and produce adverse effects; again, once the drilling pump fails or the circulation equipment leaks (including marine casing), the wellbore pressure profile will change immediately, which may lead to complex situations such as lost circulation, overflow, and well collapse. However, the wellbore pressure control tools and methods in the prior art cannot be timely and timely respond effectively
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[0045] The present invention will be further described below in conjunction with accompanying drawing. The present invention proposes an apparatus 20 and a corresponding method for controlling wellbore pressure.
[0046] figure 1 One embodiment of an apparatus 20 for controlling wellbore pressure according to the present invention is shown.
[0047] Such as figure 1 As shown, the device 20 for controlling wellbore pressure includes a measuring sensor 6 installed on a drill pipe 5 driven into the earth's crust 4 for measuring downhole parameters and a pressure influencing element 7 capable of adjusting wellbore pressure conditions.
[0048] Wherein the drill pipe 5 has power and signal transmission functions. At present, the power and signal transmission in the drill pipe is basically completed through wired methods. However, it can also be carried out wirelessly under the premise of ensuring stable power and signal transmission.
[0049] The installation positions and quan...
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The invention relates to the field of oil drilling. The present invention proposes a device for controlling wellbore pressure, comprising at least one measuring sensor and at least one pressure influencing element mounted on a drill pipe, and a controller for controlling said pressure influencing element, said measuring sensor will The detected wellbore parameters are sent to the controller, and the controller controls the pressure influencing element to not work or affect the pressure state of the surrounding fluid according to the received wellbore parameters. The invention also proposes a corresponding method. Through the equipment and method for controlling wellbore pressure according to the present invention, firstly, according to the detected wellbore parameters, the state of the wellbore in the entire longitudinal direction can be controlled in real time, and then the pressure-affecting element is controlled by the controller, in the longitudinal direction of the wellbore Achieve unified and overall control.
Description
technical field [0001] The invention relates to the technical field of drilling for oil and gas development, in particular to equipment and methods for controlling wellbore pressure. Background technique [0002] In order to increase the rate of penetration, reduce reservoir pollution, avoid mud loss, increase wellbore stability, and control overflow kicks, etc., controlled pressure drilling and well control technology has become a hot spot in drilling research at home and abroad in recent years. [0003] HydroPulse in state of the art TM The pulse tool uses the opening and closing of the flow circulation valve to block the incoming flow intermittently, and exerts an impact force on the drill bit, thereby forming a suction pressure pulse and producing a suction pulse drilling effect. [0004] In the prior art, a negative pressure pulse tool has been developed based on the Coanda jet principle. The basic principle is: when the high-speed liquid flow passes through the nozzle...
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IPC IPC(8): E21B21/08
Inventor 许卫平任红吴仲华韩来聚马清明温林荣
Owner CHINA PETROCHEMICAL CORP