XHRC350 Air Reverse Circulation Drill Rig Project in Angola
This case study highlights how Xinhao DrillingRig successfully delivered a customized XHRC350 Air Reverse Circulation Drill Rig solution to support rural water well construction in Angola.

The project included:



4 × XHRC350 Air Reverse Circulation Drill Rigs



4 × Air Lift Pumps



20 × PDC (Polycrystalline Diamond Compact) Drill Bits



4 × Diesel Generator Sets



2-Year After-Sales Maintenance Service

What Is a Drilling Rig? A Complete Guide to the “Earth Explorer” Machine
When people hear the term drilling rig, they often imagine a powerful machine working loudly on construction sites or in remote mining areas. In reality, a drilling rig is much more than a large piece of equipment — it is one of the most important tools humans use to explore underground resources and support modern infrastructure.

In international construction and infrastructure projects, equipment delays can create far greater consequences than in domestic projects. When a drilling machine is delayed at customs in Jakarta, or when a shipment to Dubai takes weeks longer than expected, project schedules can quickly collapse.

For contractors and project managers, price and specifications matter, but they are not always the deciding factors. What truly determines whether a project proceeds smoothly is fast delivery and reliable machine performance.

This is especially true for equipment such as XinHao Drilling Rig, including hydraulic core drilling rig, reverse circulation drilling rig, DTH drill rigs, truck mounted drilling rig, and water well rig. In global drilling projects, these machines must arrive on time and operate consistently under varying geological and environmental conditions.

Drill pipes are the core power-transmission components of any drilling system. Whether used on a XinHao drilling rig, mining rigs, or water well drilling equipment, drill pipes are constantly exposed to rock cuttings, mud, moisture, and high torque.

Without proper maintenance, common problems such as thread wear, corrosion, bending, stuck drilling, and hole deviation can occur—significantly increasing replacement costs and downtime.

The good news?

Mountain drilling projects such as slope stabilization, quarry mining, and highway anchoring face one common challenge: complex terrain combined with limited working space and frequent relocation.

Choosing the right DTH drill rig—tracked or wheeled—directly impacts drilling efficiency, jobsite safety, and overall operating cost.With the right configuration, drilling efficiency can increase by up to 30%. With the wrong one, operators may face stuck machines, unstable drilling, and excessive downtime.

For mining and geological exploration projects, stable equipment performance directly affects drilling efficiency, project timelines, and operating costs. A hydraulic core drilling rig is a major investment, and no operator wants to see it fail early due to poor maintenance.

In today’s engineering and drilling industry, cost control and efficiency are more important than ever. Contractors and project owners are no longer looking for single-purpose equipment — they want one machine that can handle multiple working conditions.

The hydraulic DTH drilling machine, especially the XinHao drilling rig, has become a preferred solution across mining, construction, and geological exploration. Thanks to its modular design, adjustable parameters, and strong mobility, one machine can easily adapt to different projects with minimal modification.

This article explains how one hydraulic DTH drilling machine achieves multi-scene operation, and how to set it correctly for different applications.

The hydraulic system is the core power source of any dth drilling machine, directly affecting drilling efficiency, stability, and operating costs. In harsh mining and quarry environments, poor hydraulic maintenance often leads to oil leaks, pressure loss, and unexpected downtime.

This guide explains the key hydraulic system maintenance steps for XinHao Drilling Rig, including oil replacement, filter inspection, leak detection, and component care. Whether you operate a dth rig machine or work in dth rotary drilling, this practical overview helps extend equipment lifespan, reduce failures, and keep your drilling rig running reliably under tough conditions.

Core drilling is one of the most reliable methods for understanding what lies beneath the ground. From mineral exploration to underground engineering, high-quality core samples provide critical geological data for accurate decision-making. In this article, we explain how core drilling works, why it matters, and how advanced equipment like the XinHao Drilling Rig, hydraulic core drilling rigs, and underground core drilling solutions help improve drilling efficiency, safety, and exploration success.

In geological exploration, mineral exploration, and oil drilling projects, selecting the right core drill bit is just as important as choosing a reliable drilling rig. A well-matched drill bit directly affects drilling efficiency, core recovery rate, operational safety, and overall project cost.

As global mining companies face stricter environmental regulations and rising energy costs, green mining has become a core development strategy. Modern dth drilling machines are no longer just about drilling speed — they are now designed to reduce emissions, control dust, and improve energy efficiency.



As a manufacturer with 16 years of drilling rig production experience, XinHao Drilling Rig continuously develops dth drill rigs that help mining companies achieve both high productivity and environmental compliance.

In geological exploration, Rock Core Sampling quality directly determines the accuracy of exploration data.
However, many contractors face common problems such as broken cores, low recovery rates, sand-filled core barrels, or even empty core tubes.



Based on years of field service experience, XinHao Drilling Rig has found that over 80% of incomplete core recovery issues are caused by improper drilling mud ratios and insufficient hole cleaning, rather than the drilling machine itself.



This guide explains practical, field-proven solutions to help you improve core recovery using the right mud mix and cleaning methods—especially when working with a rock core drilling machine or crawler rig in remote locations.