Introduction

Our drilling design is used to aggravate the weight of the drill and pumping drilling fluid. It is an overall heavy wall connector and is made of a solid alloy steel solid rod. The solid rod is quenched and recovered to obtain the required mechanical performance, and then opens, punching and thread processing. Our drilling is smooth or spiral; the outer surface of the spiral drill is grooved, which can promote the uniform flow of drilling fluid around the diamond diameter, balance the pressure and reduce the occurrence of different pressure card diamonds.

Drill collar materials

Diamonds are made of AISI 4145h modified steel and are supplied under the smoothness of rolling surfaces (can provide replacement of representative surfaces). Diamond i is opened and drilled in accordance with the API specification 7-1. The full-length thermal treatment process ensures that the mechanical performance meets or exceeds the requirements of the API specification 7-11. The hardness range is 285-341, and the minimum impact strength of the Xiabi "V" gap at 70 ° F is 40 FT-LB, ensuring 1 IN. Below.

Diamonds are made of AISI 4145h modified steel and are supplied under the smoothness of rolling surfaces (can provide replacement of representative surfaces). Diamond i is opened and drilled in accordance with the API specification 7-1. The full-length thermal treatment process ensures that the mechanical performance meets or exceeds the requirements of the API specification 7-11. The hardness range is 285-341, and the minimum impact strength of the Xiabi "V" gap at 70 ° F is 40 FT-LB, ensuring 1 IN. Below.

Drill collar connection features

API connection-all API connections (conventional, NC, H90, and PAC) meet the size requirements specified in the API specifications and guidelines in API RP7G. Other connections can meet specific needs.

Phosphate coating -All connections are coated with phosphate coating to improve wear resistance.

Stress elimination function -API sales stress elimination slot and API box hole can reduce fatigue failure. These features increase the flexibility of connection and reduce the high stress concentration that usually occurs near the meshing thread. Stress elimination features are processed in accordance with the API specification 7-2.

Cold rolling -drilling thread roots are cold rolled. Cold rolling has a compressed stress condition, which increases fatigue life by minimizing cracks.

Slip and elevator recesses

From the raw materials received by the factory to the completion of all manufacturing, the traceability of drilling materials and craftsmanship can be maintained. The serial number is printed on the drilling body.

We check all drills to meet the API standards and Grant Prideco specifications. These inspections include visual inspection and ultrasonic inspections of the entire length of drilling.

API Spec 7-1 drill collars are made of rolled or forged AISI4145H chromium molybdenum alloy steel. Therefore, it is necessary to effectively control the content of chemical components and trace elements.