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Underground sliding sealing tool, infinite extension drilling device and drilling method thereof

A sliding sealing and sealing device technology, which is applied in the drilling driving device, drilling equipment and method, drilling equipment and other directions in the wellbore, can solve the problems of limited drilling extension ability, improve the rock breaking efficiency and reduce the rock breaking efficiency. Difficulty, the effect of reducing the number of applications

Pending Publication Date: 2017-03-15
HISPEED WUHAN PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, regardless of the micro-hole drilling technology or the conventional horizontal well drilling technology, there is a problem of limited drilling extension ability, and there is an urgent need for a tool that can significantly increase the extension ability of micro-hole drilling and horizontal wells

Method used

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  • Underground sliding sealing tool, infinite extension drilling device and drilling method thereof
  • Underground sliding sealing tool, infinite extension drilling device and drilling method thereof
  • Underground sliding sealing tool, infinite extension drilling device and drilling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] Such as figure 1 and 2As shown, this embodiment provides a downhole sliding sealing tool, including a downhole power device and a sealing device installed on the downhole power device. The downhole power device includes an upper mandrel 1, a middle mandrel 4, and a lower mandrel 6. Wherein the upper mandrel 1, the middle mandrel 4 and the lower mandrel 6 are all hollow structures. In this embodiment, the hollow part at the top of the upper mandrel 1 is a tapered structure with a wide top and a narrow bottom, and the inner surface of the tapered structure is screwed with the drill pipe 20 . The middle mandrel 4 is an axially symmetrical structure, the upper part of the middle mandrel 4 is fixedly connected with the lower part of the upper mandrel 1 through an internal thread, and the lower part of the middle mandrel 4 is fixedly connected with the upper part of the lower mandrel 6 through an external thread. The lower part of the lower mandrel 6 is threadedly connected...

Embodiment approach 2

[0041] Such as figure 1 As shown, the first embodiment is further optimized, the lower casing 7 is installed in the lower mandrel 6, and the lower casing 7 and the middle mandrel 4 are fixed by the rubber fixing sleeve 5 of the packer, wherein , the hollow part below the lower shell 7 in the lower mandrel 6 constitutes the lower central flow channel 19, the gap between the lower mandrel 6 and the lower shell 7 forms the flow channel 16 between the double walls, and the upper central The flow channel 15, the lower central flow channel 19 and the flow channel 16 between the double walls communicate with each other. As a preference of this embodiment, the inner diameter of the upper central flow channel 15 is larger than the inner diameter of the lower central flow channel 19 .

[0042] Such as figure 1 As shown, this embodiment is further optimized, a plug 8 is set in the middle of the lower central flow channel 19, the upper central flow channel 15 communicates with the outer...

Embodiment approach 3

[0044] To further optimize Embodiment 1 or Embodiment 2, a plunger cylinder 13 is provided at the bottom of the piston cylinder 10, the piston cylinder 10 communicates with the plunger cylinder 13, and the piston in the piston cylinder 10 is connected to the piston cylinder 13. The plunger 11 is integrally connected, and the lower part of the plunger barrel 13 is provided with an oil injection hole for delivering pressurized hydraulic oil from the piston barrel 10 to the gap between the upper mandrel 1 and the rubber barrel 3 of the open hole packer 14. As a preference of this embodiment, the inner diameter of the piston barrel 10 is larger than the inner diameter of the plunger barrel 13 .

[0045] This embodiment also provides a drilling device with infinite extension, including a drill pipe 20, a screw power drill 21 and a PDC drill bit 22, and also includes the downhole sliding sealing tool described in this embodiment, the upper part of the downhole sliding sealing tool a...

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Abstract

The invention discloses an underground sliding sealing tool, an infinite extension drilling device and a drilling method thereof. The underground sliding sealing tool comprises an underground power device and a sealing device arranged on the underground power device, wherein the underground power device comprises an upper part mandrel, a middle part mandrel and a lower part mandrel, the sealing device comprises a rubber support sleeve and an open hole packer rubber sleeve, the open hole packer rubber sleeve is arranged at a joint gap of the upper part mandrel and the middle part mandrel, the upper part of the open hole packer rubber sleeve is fixed together with the support sleeve, and the lower part of the open hole packer rubber sleeve is fixed together with the middle part mandrel; a piston cylinder is arranged in the upper part mandrel, one piston upper end hole communicated with the external space of a tool shell is formed in the upper part of the piston cylinder, and a piston lower end hole communicated with the center flow channel is formed in the lower part of the piston cylinder. The device and the method which are disclosed by the invention have the advantages that enough bit pressure can be provided for micropore drilling and horizontal drilling, so that the extension capability of the micropore drilling and horizontal drilling is improved, and the drilling cost is obviously reduced.

Description

technical field [0001] The invention relates to an oil and gas drilling project, in particular to a downhole sliding sealing tool for micro-hole drilling and large-extension horizontal well drilling, an infinitely extending drilling device and a drilling method thereof. Background technique [0002] There are many differences between microhole drilling and slimhole drilling in terms of key technologies and basic concepts. The purpose of slimhole drilling is simply to find a cheaper way to do the same work that conventional drilling rigs and drilling techniques can do; microhole drilling focuses on supporting a major A business model that enables the development of shallow oil and gas resources and establishes an approach that balances various seismic imaging technologies through combination with low-cost drilling capabilities. [0003] For micro-hole drilling, in addition to requiring the application of small-sized and high-efficiency ct drilling rigs, the focus is mainly o...

Claims

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Application Information

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IPC IPC(8): E21B4/00E21B33/126E21B4/02E21B21/00E21B21/08E21B7/00E21B7/04
CPCE21B4/00E21B4/02E21B7/00E21B7/046E21B21/00E21B21/08E21B33/126
Inventor 魏小梅
Owner HISPEED WUHAN PETROLEUM TECH CO LTD
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