Polycrystalline diamond composite sheet for drilling in plasticity stratum

A polycrystalline diamond and composite sheet technology, applied in drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of tooth chipping, difficult-to-drill strata, and the drill bit is prone to chipping, so as to reduce chipping and improve drilling penetration. Efficiency, reduction of grinding heat

Pending Publication Date: 2019-08-06
SF DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned extremely difficult to drill formations and the drill bit is prone to tooth chipping, patent 201721524171 .X provides a solution to the problem of tooth chipping caused by crack propagation on the surface, but it is not yet competent in efficient chip removal in plastic formations

Method used

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  • Polycrystalline diamond composite sheet for drilling in plasticity stratum
  • Polycrystalline diamond composite sheet for drilling in plasticity stratum
  • Polycrystalline diamond composite sheet for drilling in plasticity stratum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Reference attached figure 2 As shown, it is a polycrystalline diamond compact for plastic formation drilling with double-blade teeth of similar structure. The plowing blade 103 of this four-blade composite sheet has a radial extension length of 1.51mm and a height of 1.20mm, and its angle with the outer edge surface 102 is 65°; and the chip removal groove 104 and the plowing blade 103 are at 90° Distributed vertically, its angle with the peripheral surface 102 is 83°.

Embodiment 2

[0031] Reference attached image 3 As shown in Fig. 1, it is a polycrystalline diamond compact for drilling plastic formations with three blades of similar structure. The plowing blade 103 of this four-blade composite sheet has a radial extension length of 1.83mm and a height of 1.23mm, and its angle with the outer edge surface 102 is 81°; while the chip removal groove 104 and the plowing blade 103 are at 23.2° The connections are arranged in a ring shape, and the angle between them and the outer edge surface 102 is 86°.

Embodiment 3

[0033] Reference attached Figure 4 As shown, it is a polycrystalline diamond compact for plastic formation drilling with four teeth with similar structure. The plowing blade 103 of this four-blade composite sheet has a radial extension length of 1.78mm and a height of 1.23mm, and its angle with the outer edge surface 102 is 74°; and the chip removal groove 104 and the plowing blade 103 are at 28.5° The connections are distributed in a ring, and the angle with the outer edge surface 102 is 83°.

[0034] The polycrystalline diamond compacts for drilling plastic formations provided in Embodiment 1, Embodiment 2 and Embodiment 3 are suitable for drilling medium-hard rock formations. This multi-tooth structure also greatly improves the utilization rate of the composite sheet and reduces the drilling cost.

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Abstract

The invention discloses a polycrystalline diamond composite sheet for drilling in a plasticity stratum. The polycrystalline diamond composite sheet includes a polycrystalline diamond layer and a hardalloy base supporting body bonded to the polycrystalline diamond layer, wherein the polycrystalline diamond layer includes an upper surface and an outer edge surface, and plough-cutting blade teeth and chip removing grooves are formed in the upper surface and the outer edge surface at the junction area of the supreme part; and the plough-cutting teeth are connected with the chip removing grooves at a certain angle and extend in a circular distribution mode in the radial direction. According to the polycrystalline diamond composite sheet for drilling in the plasticity stratum, the structure hasthe advantages of being high in sharpness and efficient in chip removing, the well drilling efficiency can be greatly improved, the mud balling phenomenon is prevented, and stability of well drillingplatform control is ensured.

Description

technical field [0001] The invention belongs to the technical field of superhard composite materials, in particular to a polycrystalline diamond composite sheet for drilling plastic formations. Background technique [0002] Diamond is regarded as an ideal drilling material and cutting material due to its ultra-high hardness and wear resistance, and the advent of polycrystalline diamond compact (PCD) has become an important milestone in the development history of diamond application technology. At present, PCD composite sheet has been used as a super wear-resistant cutting element in rotary drill bits, diamond drill bits and other tools, and it is widely used in oil and natural gas drilling and other fields. With the transformation and innovation of exploration concepts, unconventional oil and gas (such as shale oil, gas, etc.) In formations such as hard rock formations and tough interlayers, there are often serious drilling accidents such as tooth chipping and even drill st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46
CPCE21B10/46
Inventor 杜卫锋赵东鹏马姗姗李思成方海江
Owner SF DIAMOND CO LTD
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