Gao Zhiguo's words made Zhao Yuemin immediately sober up. He finally understood that what he was about to inherit was a mess. Although the machine repair shop has a large number of people and a high level, this factory director is not necessarily as comfortable as the drilling team leader.

Su Guoliang is pinning the hope of the whole factory on himself.

After Zhao Yuemin chatted with Gao Zhiguo, he walked out slowly alone, walking slowly under the dim street lamp. He thought about Gao Zhiguo's instructions on how to improve the production quality of the factory and how to re-establish the core products. After all, a machine shop can't just repair drilling equipment to make a living, and to feed so many people, it must re-identify the core products that can be used.

Zhao Yuemin's distress is not understood by anyone for the time being. Zhao Yuemin's happiness is known to the whole town. Shaohu Town has a total population of more than 20,000 people, which is about the same as the Jiangbei Oilfield workers and their families. On weekdays, in addition to all kinds of news in the town, everyone talks about things in the oil field.

Zhao Yuemin, a young man in the town, was about to become the director of the machine repair factory at a young age, which exploded in the whole town. Many men, women and children in the town are talking about this while munching on melon seeds.

Even the director of the town commune personally visited Zhao Yuemin's house with cigarettes and alcohol. What is the rank of the director of the machine shop? It's as big as the mayor. Besides, that machine shop is a treasure storehouse. Pull out a worker, fix a tractor for the town, fix a motorcycle, or simply make parts for household appliances, you need everything.

The director of the town commune looked at the small area of Zhao Chunda's house, and said with a pity on his face, how can he live in such a small house? He said that the town was even willing to solve the housing problem of Zhao Yuemin's family.

After Zhao Yuemin was promoted to factory director, there was naturally a bright two-bedroom and one-hall housing allocation in the unit. However, Zhao Chunda was a little unbearable. There were so many people visiting the house during the day and night that he had to carry fishing tools and hide outside, and only returned home like a thief in the middle of the night.

Soon, the bureau issued a document and asked Zhao Yuemin to do the handover for the last month. Regarding the suitable candidate to take over as the leader of the drilling team, Zhao Yuemin mentioned Zhang Yuanchao's name.

On the last day of the handover, Zhao Yuemin deliberately came to the well site in the Gaoqiao area again. He looked at the tall drilling tower and the oil extractor, and felt a little emotion in his heart, I am afraid that the days of being able to come to the well site in the future are numbered.

He looked up and saw a sign hanging on the well site:

"The well field is our youth! - Zhao Yuemin, Captain of the Drilling Brigade"

Zhao Yuemin smiled slightly, walked to the drill tower again, and found some drilling workers buried their heads in discussing something.

"What's wrong?" Zhao Yuemin walked to the side with his clothes on.

"Captain, today the door is evil, I drilled for hundreds of meters, and three cone bits were broken......," said the worker on the side, pointing to a few drill bits on the ground.

"Is the drilling going according to the rules?" Zhao Yuemin asked.

"It must be, according to the rules you set Captain." One said.

"But, captain, the geology in this area is all solid granite and sandstone, and the cone bit will wear out if you can't drill deep......"

"Yes, we've never encountered such hard first- and second-level geology before......"

Cone bits were the most widely used at the time. When the cone bit is working, the cutting teeth alternately contact the bottom of the well, the rock breaking torque is small, the contact area between the cutting teeth and the bottom of the well is small, the specific pressure is high, and it is easy to eat into the formation. However, its lack of wear resistance, short service life, and poor effect on hard formations are still very significant shortcomings.

Zhao Yuemin knew that in the past, when he encountered this kind of formation conditions, he could only send one drill bit after another like a daredevil, and then go up after one was broken. This method will cause a huge waste of equipment. For this matter, he consulted several engineers from the geological department, and they still did not have a good way to solve this hard rock formation.

Not only the Jiangbei Oilfield is unsolvable, but the Daqing Oilfield and other oilfields are having a headache for this problem.

Zhao Yuemin asked his colleagues in the engineering equipment department, but there was no better idea, so he decided to go back to his father. If my father can't solve it, I'm afraid I'll have to give up for the time being.

"Yuemin, in the case of composite drilling, the inadaptability of the cone bit to the hard formation is a generally recognized problem in the industry." At home, Zhao Chunda sat at his desk and wiped his square-framed glasses with a glasses cloth.

"The rock-breaking mechanism of the cone bit is impact crushing. The impact force generated by the longitudinal vibration and the static load pressure cause the 'teeth' to impact and crush the formation. However, when the coverage of the 'teeth' at the bottom of the well changes, especially when encountering hard formations, every time the drill bit rolls at the bottom of the well, the law of the concentric circle of each gear ring is disrupted, resulting in insufficient crushing at the bottom of the well, and the shell of the tooth alveolar part at the tip of the cone is thin, which is easy to cause the drill bit to fail. Zhao Chunda explained.

"Dad, I probably understand what you mean. Anyway, the cone bit is not suitable for hard formations. Do you have any methods? If we can design a new type of drill bit that can adapt to hard ground, we can solve this major problem. At that time, I, the director of the machine repair factory, will take office, and I will have products to produce. ”

Zhao Chunda was angry and funny: "You are the Monkey King when your father is the Monkey King, what do you want to change?" ”

"Dad, in my eyes, you are the Monkey King, just a little fat......"

"Young poor mouth, is there a Monkey King with a dry-burning boiler?"

Zhao Chunda stood up, picked up a journal and raised his head: "You don't know, many domestic oilfield scientific research institutions are now conducting research on this topic. How easy is it to create a new range of drill bits? ”

"Dad, you're saying you can't help it?" Zhao Yuemin sighed.

"What...... way" Zhao Chunda stroked his thick beard and said, "There are still them, but there are half of them." ”

"Dad, why do you keep playing with me?"

"Yuemin, listen to me, to design a new type of drill bit is not an overnight thing." Zhao Chunda opened his drawer, pulled out one from a stack of drawings, and spread it on the desk.

"Yuemin...... Look at ......," Zhao Chunda turned on the lamp light and pointed to the drawing, "Many years ago, I noticed the wear-resistant characteristics of the cone bit, and I have been researching alternative materials. After so many years, I can finally determine that there is a material that can handle hard formations, with a long working life and smooth performance, and that is diamond. ”

"Diamonds?"

"Yes, diamond drill bits. Yuemin, in this drawing, a surface setting process is used to inlay natural diamonds on the surface of the steel carcass, I call it a surface inlaid diamond drill bit...... "Zhao Chunda's eyes shone brightly.

"The aggressiveness of the diamond drill bit allows for higher mechanical speeds, and it is more impact-resistant and more suitable for hard ground than cone bits."

"It's a pity......" After Zhao Chunda finished speaking, he sighed: "I'm a bad old man who studies blindly, and I can't put it into production, so I can only let it go to ......" After that, Zhao Chunda stuffed the drawings back into the drawer.

Diamond drill bits are just one of the products that Zhao Chunda has many design ideas.

At this point, father and son are not aware of each other, and they are talking about what is considered one of the greatest innovations in the drilling industry of the early eighties......