Tail pipe well drilling and well completion technique

A liner and drilling technology, applied in drilling equipment, drilling equipment and methods, earthwork drilling and other directions, can solve the problems of difficult to guarantee the cementing quality, short drilling length, long drilling length, etc., and achieve excellent cementing quality, Reliable drilling with fewer tools

Active Publication Date: 2009-04-08
DAQING PETROLEUM ADMINISTRATION +1
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the existing liner drilling technology that the cementing quality is difficult to guarantee, it is easy to cause serious downhole accidents, the process is complicated, there are many tools involved, the reliability is poor, and the drilling length is short, the present invention provides a liner drilling and well completion technology, which The liner drilling and completion process has the characteristics of good cementing quality, safety and reliability, simple process, less tools involved, and long drilling length

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  • Tail pipe well drilling and well completion technique
  • Tail pipe well drilling and well completion technique
  • Tail pipe well drilling and well completion technique

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing:

[0020] Depend on figure 1 combine figure 2 , image 3 As shown, the liner drilling and completion process is after technical casing cementing;

[0021] (1), liner drill string connection. The main function of this operation is to form the liner drill string. It includes kelly 23, drill pipe 24, rotary liner hanger 25 for drilling and completion respectively, liner 26, flower basket rubber plug seat 27, floating hoop 28, and drill bit 29, which are sequentially connected by threads, The rotary table drives the kelly 23 for drilling and cementing, and the rotary liner hanger 25 for drilling and completion controls the connection and release of the drill pipe 24 and the liner 26 .

[0022] (2) Liner drilling. The main function of this operation is to drill smoothly with the liner drill string. Drilling is carried out by adopting the gas used in the existing ordinary dr...

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Abstract

The invention discloses a liner drilling and well completion process, which mainly solves the problems of difficult guarantees of cementing quality to the liner drilling process, easy occurrence of serious drilling troubles, complex processes, a plurality of related tools, poor reliability and short maximum drilling length. The process is characterized in that: after the well completion of an intermediate casing: (1) a liner drilling string is connected; (2) the liner drilling is carried out; (3) the drilling is finished; (4) then a hanging liner and a running tool are disentangled from a liner hanger; (5) a well completion string is connected; (6) the liner is rotated to carry out well cementation; (7) the liner is set; and (8) a drill rod and the running tool are taken out. The liner drilling and well completion process is characterized by good well cementation quality, safety and reliability, simple process, fewer related tools and longest maximum drilling length.

Description

Technical field: [0001] The invention relates to a tailpipe drilling technology in the field of oil field drilling, especially a tailpipe drilling and well completion technology. Background technique: [0002] Casing drilling technology is a revolutionary new technology in the field of drilling worldwide and has broad application prospects. Casing drilling has changed the operation mode of conventional drilling. It synchronizes downhole rock-breaking drilling and casing operation. It has the technical characteristics of integration of drilling and completion, which can not only reduce engineering costs, but also reduce the occurrence of downhole complex accidents. And it is beneficial to reservoir protection and other advantages. Liner drilling is a form of casing drilling. Liner drilling is a type of casing drilling, so it also has the advantages of reducing drilling costs and downhole accidents. Especially for deep wells with complex abnormal conditions such as borehole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/20
Inventor 刘玉民杨智光金志富李秋杰杨决算李玉海张洪君
Owner DAQING PETROLEUM ADMINISTRATION
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