Increasing number of drill bits using braze and wedge soldering engagement

The article demonstrates the way of solving the problem connected with replacement of drill bits through the use of thermal and mechanical engagement methods and their combinations. Such engagement contains a wedge, which greatly reduces the cutting area per bit in drilling, i.e. the number of drill bits is small. Aimed to enhance efficiency of drilling, it is necessary to try to attempt to increase the number of drill bits without the loss in their strength and dismountability. To this effect, based on the strength analysis of tool materials under conditions of clamp, it is decided to be feasible to diminish geometrical dimensions of wedges in wedge engagements in drill bits. It is proposed to make paired counter wedges of stronger three-layer braze alloy TP-1M and to use them to fasten bits in the required position in the housing by soldering. This enables elimination of clamp wedges replaced by extra bits, which enlarges the bottomhole attack zone of drill bits. The tests show that the engagement strength of the braze and wedge soldering in the housing with side wall is equal to the engagement strength of welding wedge engagement, while feasibility of radial notch along the solder seam allows replacement or rearrangement of bits with subsequent re-soldering without additional tooling.

Fedorov L. N., Fedorov I. V. Increasing number of drill bits using braze and wedge soldering engagement. MIAB. Mining Inf. Anal. Bull. 2021;(12 — 1):233—242. [In Russ]. DOI: 10.2 5018/0236_1493_2021_121_0_233.

Fedorov L. N.¹, Scientific degree, Scientific employee, lnfedorov@mail.ru;
Fedorov I. V.¹, Scientific degree, engineer,
¹ Institute of Mining of the North named after N. V. Chersky SB RAS — a separate subdivision of the Federal Research Center “Yakutsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences”, 677980, Russia, Republic of Sakha (Yakutia), city of Yakutsk, GSP, Lenin Ave, 43.

1. Vorob’eva M. V., Perfilov S. A., Pozdnyakov A. A., Lomakin R. L., Blank D. V. New possibilities of rock cutting tools equipped with diamond-carbide cutting elements. Voprosy materialovedeniya. 2020. no. 1(101). pp 74 — 84. [In Russ].

2. Tret’yak A. A. Teoreticheskoe obosnovanie, razrabotka konstruktivnykh parametrov tekhnologii bureniya skvazhin koronkami, armirovannymi almazno-tverdosplavnymi plastinami: [Theoretical substantiation, development of design parameters for the technology of drilling wells with bits reinforced with diamond-hard alloy plates]. Doctor’s thesis Novocherkassk: South-Russian State Polytechnic University (NPU) named after M. I. Platova 2017. 319 p. [In Russ].

3. Alexander G. Kvashnin, Hayk A. Zakaryan, Changming Zhao, Yifeng Duan, Yulia A. Kvashnina, CongweiXie, Huafeng Dong, Artem R. Oganov. New Tungsten Borides, Their Stability and Outstanding Mechanical Properties. Cite This: J. Phys. Chem. Lett. 2018, 9, pp. 3470−3477.

4. Narayan J., Bhoumik A., & Narayan R. (2016). Discovery of Q-phases and direct conversion of carbon to diamond and h-BN v c-BN. Advanced materials and processes, 2016, 174 (3), pp. 24—28.

5. Narayan J., Gupta S., Bhaumik A., Sachan R., Cellini F., &Riedo E. Q-carbon harder than diamond. MRS Communications, 8(2), (2018), pp. 428—436.

6. Natalia A. Solopova, Natalia A. Dubrovinskaya, Leonid S. Dubrovinsky. Synthesis of nanocrystalline diamond from glass carbon balls. J. Cryst. 412, (2015), pp. 54—59. Google Scholar.

7. Tret’yak A.Ya., Litkevich Yu. F., Aseeva A. E. i dr. Patent RF no. 2009146596/03 15.12.2009. Kol’tsevaya burovaya koronka. 2011, Byul. no. 18.

8. Fedorov, L. N., Ermakov S. A., IvanovI. I. Drill bit with welded-wedge fastening of cutters. MIAB. Mining Inf. Anal. Bull. 2017, no. 11 (special issue 24), pp. 162 — 169. [In Russ].

9. Sysoev N. I., Chu Kim Khung, Burenkov N. N. Obosnovanie struktury i vybor ratsional’nykh konstruktivnykh parametrov burovogo reztsa, armirovannogo almaznotverdosplavnymi plastinami. Tekhnicheskie nauki (izvestiya vuzov. Severo-Kavkazskii region). 2016, no. 2, pp. 77—83. [In Russ].

10. NovikovskiiE. A. Paika metallov (uchebnoe posobie) [Brazing of metals (textbook)], Barnaul, Printing house of Altai State Technical University, 2013, 63 p.

11. FedorovL. N., ErmakovS. A. Strength of cutter inserts made of hard and superhard materials under wedge clamping conditions. MIAB. Mining Inf. Anal. Bull. 2018, no. 12, pp. 142—150. [In Russ].

12. Rekomendatsii po paike i termoobrabotke metallorezhushchego instrumenta. [Recommendations for soldering and heat treatment of metal cutting tools], available at: http://www.kzts.ru/articles/15. (accessed: 13.02.2021).

13. Fedorov L. N., Fedorov I. V. Razrabotka metodiki sravnitel’nykh ispytanii nareztseuderzhanie novykh raz”emnykh sposobov krepleniya reztsov burovykh koronok [Development of a comparative test method for incisal retention of new detachable methods of fastening the cutters of drill bits]. Geologiyai mineral’no-syr’evye resursy Severo-Vostoka Rossii: IX Vserossiiskaya nauch.-praktich.konf. (Yakutsk, 10—12 aprelya 2019 g.). Otvet. redaktor L. I. Polufuntikova. Yakutsk, Publishing House of the North-Eastern Federal University, 2019. Vol II. — p. 309—313.

14. Kozlov A. G. Planirovaniye i obrabotka rezul’tatov eksperimenta: metodicheskoye posobiye dlya studentov [Planning and processing of the results of the experiment: a methodological guide for students], Yakutsk, Publishing House of the North-Eastern Federal University], 1977. 54 p. [In Russ].