Coring System for Coring While Drilling

A coring and while-drilling technology, which is applied in the direction of undisturbed core extraction, earthwork drilling, wellbore/well components, etc., can solve the problems of high tripping times, poor core quality, interlayer coring and low efficiency of continuous coring and other issues to achieve the effect of improving efficiency and saving time

Active Publication Date: 2015-08-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of conventional coring tools, such as too many trip times, low efficiency of interlayer coring and continuous coring, poor core quality, etc., the present invention proposes a coring system suitable for coring while drilling, which can Alternately implement drilling and coring without drilling, saving time and improving efficiency

Method used

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  • Coring System for Coring While Drilling
  • Coring System for Coring While Drilling
  • Coring System for Coring While Drilling

Examples

Experimental program
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Effect test

Embodiment 1

[0044] See attached figure 2 and 7 , the invention discloses a coring system for drilling while drilling. and the adjustment cap; the upper end of the mandrel is fixed in the bearing box through bearings; the lower end of the mandrel is set in the adjustment cap and is threadedly connected with the adjustment cap, and the lower end of the mandrel in the adjustment cap is provided with a single-flow valve seat and a plum blossom baffle and a brake ring, the brake ring is fixed by a pressure cap, and a steel ball is arranged on the single-flow valve seat; the adjustment cap is connected with the elastic locking mechanism.

[0045] In this example, the salvage mechanism and the latching mechanism used are prior art well known to those skilled in the art, and it is sufficient to directly combine the rotating mechanism of this example with the existing fishing mechanism and the latching mechanism.

Embodiment 2

[0047] As a preferred embodiment of the present invention, the present invention also includes that the bearing is placed at the step provided at the upper end of the mandrel, and a half ring is set on the outer side of the bearing close to the upper end of the mandrel, and an axial steel wire retaining ring is set on the half ring . The plum blossom baffle is fixed on the inner step of the lower end of the mandrel by welding, the single-flow valve seat is screwed into the lower end of the mandrel and welded; the pressure cap one is threaded with the mandrel, and the brake ring is connected with the mandrel through the keyway fit , the brake ring is located between the pressure cap and the adjustment cap. The upper end of the adjustment cap is provided with a notch to cooperate with the protrusion on the brake ring. Described bullet card mechanism comprises recovery tube, bullet caliper, bullet card seat, bullet card frame and hanging ring joint, and bullet card mechanism is ...

Embodiment 3

[0055] As the best implementation mode of the present invention, refer to the appended Figure 1-7 , the invention discloses a coring system while drilling:

[0056] 1. Its structure is composed of:

[0057] Refer to the attached Figure 1-7 , which includes a fishing mechanism, a card mechanism, a core bushing rod assembly and a core bushing bit (drilling) or a rotating mechanism (during coring).

[0058] 1. Salvage mechanism:

[0059] The salvage mechanism includes a fishing barrel and a fishing head 41, and the fishing barrel is provided with a lifting ring 1, a card removal sleeve 10, a sleeve 11, a pull rod 12, a fishing hook frame 13 and a fishing hook 15; between the lifting ring 1 and the sleeve 11 There are pressure cap 2, thrust bearing 3, spacer 4, stop washer 5, transition joint 7, safety pin 8 and shear pin joint 9, stop washer 5 is fixed by nut 6, between fishing hook 15 and fishing hook frame 13 Elastic cylindrical pin-16 is arranged between;

[0060] The...

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Abstract

The invention discloses a coring system with a function of coring while drilling, belonging to the technical field of design and manufacture of well drilling and coring tools. The coring system comprises a salvage mechanism and a coring mechanism; the coring mechanism mainly comprises an elastic clamp mechanism and a rotating mechanism, wherein the rotating mechanism comprises a bearing box, a mandril and an adjusting cap; the lower end of the mandril is fixed in the bearing box through a bearing; the lower end of the mandril is arranged in the adjusting cap and is in threaded connection with the adjusting cap; a uniflow valve pedestal, a plum baffle plate and a braking ring are arranged at the lower end of the mandril in the adjusting cap, wherein the braking ring is fixed by a pressing cap I, and a steel ball is arranged on the uniflow valve pedestal; and the adjusting cap is connected with the elastic clamp mechanism. The coring system disclosed by the invention can achieve the purposes of drilling and coring alternately under the condition of not tripping out and has the advantages of saving the time and improving the efficiency.

Description

technical field [0001] The invention relates to a construction tool in the process of oil and gas drilling, and belongs to the technical field of design and manufacture of drilling coring tools. Background technique [0002] The publication number is CN1730898, and the publication date is that the Chinese patent literature on February 8, 2006 discloses a core drilling system used in geological exploration, oil drilling, scientific drilling and other industries, especially in hard rocks, deep holes, etc. Bottomhole motor and impactor driven combined core drilling system for core drilling. The system includes a coring tool and a coring bit. The lower end of the coring tool is connected to the coring bit. It also includes a downhole motor and an impactor. The lower end of the drive shaft of the downhole motor is connected to the upper end of the impactor. The lower end of the impactor Connected with the upper end of the coring tool, the downhole motor provides the rock-breakin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/00E21B31/18
Inventor 刘彬伍贤柱陈立陈晓彬邓元洲胡畔李伟成何超程云唐聪
Owner BC P INC CHINA NAT PETROLEUM CORP
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