Method and device for drilling under condition of complicated stratum
A technology with complex formations and conditions, applied in drilling equipment and methods, drilling equipment, directional drilling, etc., can solve problems such as wellbore plugging and well wall collapse, and achieve the effect of reducing the possibility of collapse
Active Publication Date: 2013-05-15
CHINA NAT OFFSHORE OIL CORP +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, complex formations have more clay components, which will swell and collapse when exposed to water (that is, the drilling fluid used in drilling), causing wellbore blockage
When drilling in complex formations, it is easy to cause wellbore collapse
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] Such as Figure 1~2 As shown, the present invention includes: formation inclination measurement unit 4, tangential direction measurement unit 5, central control unit 6 and signal transmission unit 3, formation inclination measurement unit 4 is used to measure the inclination angle α of the formation 7 where the drill bit 1 is located. The details of each unit are as follows:
[0020] Tangential direction measuring unit 5 is used for measuring the tangential direction of drill bit 1 (as figure 2 The angle ε between the direction of the arrow B shown) and the horizontal plane 8; the central control unit 6 is used to receive and process the signals measured by the formation inclination measurement unit 4 and the tangential direction measurement unit 5, and then output to the drill bit advance direction control unit 2 Control signal; drill bit advancing direction control unit 2 is used for adjusting the advancing direction of drilling bit 1 in time according to the contro...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for drilling under the condition of a complicated stratum, which comprises the steps of: a, measuring an inclination angle alpha of the stratum where a drill bit is mounted by adopting a stratum inclination angle measuring unit, meanwhile, measuring an included angle sigma of the tangential direction of the drill bit and the plane by using a tangential direction measuring unit, and transmitting signals of the inclination angle alpha and the included angle sigma to a central control unit; and b, outputting a control signal to a drill bit advancing direction control unit by the central control unit according to the inclination angle alpha and the included angle sigma, and regulating the tangential direction of the drill bit through the drill bit advancing direction control unit. The invention also discloses a device for drilling under the condition of the complicated stratum. The stratum inclination angle measuring unit and the tangential direction measuring unit are used for measuring the inclination angle of the stratum wherein the drill bit is mounted and the included angle of the tangential direction of the drill bit and the plane, and the central control unit is used for outputting the control signal to the drill bit advancing direction measuring unit according to the measurement signal, therefore, the invention ensures that the possibility of collapse of the well wall is greatly reduced.
Description
technical field [0001] The invention relates to a drilling method and device under complex formation conditions. Background technique [0002] The so-called complex formation refers to the formation that is easy to cause difficulties for drilling operations. The formation is a rocky formation composed of sandstone and clay in different proportions. Usually, the main sand component of the formation is more, which belongs to the general formation. However, complex formations have more clay components, which swell and collapse when exposed to water (ie, the drilling fluid used in drilling), causing wellbore blockage. When drilling in complex formations, it is easy to cause wellbore collapse. Contents of the invention [0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide a drilling method and device under complex formation conditions, which can effectively prevent the wellbore wall from collapsing in the formation. ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/00E21B7/04E21B44/00
Inventor 郭永峰纪少君唐长全
Owner CHINA NAT OFFSHORE OIL CORP