Casing coring drill and casing coring drilling method

A core drilling tool and casing technology, applied in the direction of extracting undisturbed core devices, drill bits, drilling equipment, etc., to achieve the effect of flexible and reliable convergence action, flexible and reliable convergence, and elimination of influencing factors

Inactive Publication Date: 2014-02-26
INST OF EXPLORATION TECH OF CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a casing coring drill and a casing coring drilling method; the casing coring drilling tool of the present invention is directly used in a core drilling project, and the core drilling process is adopted without drilling and changing the drill bit, To avoid the impact of frequent tripping and tripping on the stability of the borehole, fast and effective drilling and isolation of complex formations can be achieved by running casing while drilling; the casing coring drilling method of the present invention adopts casing core drilling while drilling Advanced technology to solve but not limited to the technical problems of complex formation drilling

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  • Casing coring drill and casing coring drilling method

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Experimental program
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Effect test

Embodiment 1

[0050] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, a casing coring drilling tool, the gyrator 58 of the core drilling machine 51 drives the upper drill rod 62 to rotate, drives the casing 56 in the hole instead of the drill rod to rotate, and drives the casing at the bottom of the hole in the working state of drilling. The core drilling tool 57 rotates; the drilling pressure applied by the core drilling machine 51 through its gyrator 58 is transmitted to the casing core drilling tool 57 at the bottom of the hole through the drill pipe 62 and casing 56 on the machine; the mud 59 from the mud pump 52 passes through the The casing is transported to the bottom of the hole, and the casing coring drill 57 performs coring drilling at the bottom of the hole. After the core containing pipe 17 is filled with the core 61, the drilling is stopped, and the casing is clamped by the orifice holder 53 56, the drill pipe ...

Embodiment 2

[0053]In this embodiment, on the basis of Embodiment 1, the upper cylindrical surface of the suspension joint 12 and the centralizing ring 24, and the double centralizing mechanism formed by the lower cylindrical surface of the suspension joint 12 and the sealing ring 26, make the inner pipe drilling tool 2 and the outer pipe drilling tool 1 Maintain a high coaxiality, and after the auxiliary drill bit 4 is opened, the casing core drilling tool has good rigidity, so that the drill tool can adopt a core containing tube with a length of more than 3 meters, and can operate at 400 rpm or more Normal drilling under the condition of a certain rotational speed; the lower part of the inner groove 32 of the bit frame 14 is provided with a sand discharge hole 33, and the cuttings ( Rock powder, gravel particles, sand, mud and other mixed solid phase substances) are excluded to prevent them from settling inside the drill bit frame, thereby eliminating the influence factors of cuttings sed...

Embodiment 3

[0055] Such as figure 1 , figure 2 , Figure 12 As shown, a casing coring drilling method, the ground device is a core drilling machine 51, a mud pump 52, an orifice holder 53, a winch 54, a rope fisher 44, and a puller 55, and the drilling device in the hole includes Casing coring tool 57 and casing 56; the casing 56 is used to replace the drill pipe and connected to the drill pipe 62 on the machine, and the core drilling machine 51 is used to drive the casing to rotate, and the casing coring tool 57 connected to the lower end of the casing is driven to carry out Coring drilling; the mud pump 52 sends the mud 59 to the hole through the inner cavity of the casing to cool the drilling tool, carry the rock powder and maintain the stability of the hole wall; The overshot 44 lifts the inner pipe drilling tool of the casing core drilling tool 57 in the hole to the ground 66, while taking the rock core 61, checks or replaces the service drill bit at the bottom of the hole, and th...

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Abstract

The invention discloses a casing coring drill applied to a core drilling project in geological exploration, and a casing coring drilling method. The casing coring drill is a hole bottom drilling device for carrying out coring drilling without lifting the drill to replace a drilling bit, and is mainly composed of an inner pipe drill capable of feeding and fishing and an outer pipe drill connected with a casing. The casing coring drilling method is characterized by comprising the following main process flows: replacing an inner hole drill stem with the casing; drilling for coring; fishing with a core; inspecting or replacing the drilling bit; feeding a coring drill; and lifting an inner pipe drill so as to finish the casing drilling operation. The casing coring drilling method disclosed by the invention adopts the casing instead of the drill stem to transfer drilling loads. The coring drilling without lifting the drill to replace the drilling bit is carried out by the casing coring drill, and running casing along with the drill is achieved; drilling is quickly and effectively achieved, and reaches the expected hole depth as a complex formation or the casing is isolated. Thus, the technical problems including but not limited to coring drilling of the complex formation are solved.

Description

technical field [0001] The invention relates to the field of geological exploration industry, in particular to a casing coring drilling tool and a casing coring drilling method. Background technique [0002] Casing drilling in the field of oil and gas drilling is mainly used in sedimentary rocks. The formation is relatively stable. Its purpose is to form wells at one time, but it is generally not possible to take cores, and it is only limited to casings with a diameter greater than Φ114.3mm, and cannot be used in geology. Small-diameter core drilling projects in the field of exploration, such as the casing drilling (drilling with casing) of Tesco Corp., which is widely used in foreign oil and gas fields, and the bottom of the casing drilling disclosed in the Chinese invention patent application number 200610070359.1. Device; Chinese invention patent application No. 200510068145.6 discloses a casing drilling method, which simultaneously adopts drill pipe and casing double-pip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00E21B10/02
Inventor 李政昭钱锋房勇张伟
Owner INST OF EXPLORATION TECH OF CHINESE ACAD OF GEOLOGICAL SCI
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