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Chinese National Day Holiday Service Notice
Dear Clients, Please be advised that our company will be observing the National Day holiday from October 1st to October 8th. For any urgent matters during this period, please contact us by email at service@landrilltools.com and we will get back to you as soon as possible. We appreciate your under...Read more -
How to Prevent Drill String Sticking (Lost Weight on Bit) in Drilling？
The term “lost weight on bit” (LWB) refers to a scenario during drilling where the designed weight on bit (WOB) fails to act on the drill bit. Instead, due to excessive friction between the downhole drill string and the wellbore wall, all the applied weight is absorbed by the drill st...Read more -
LANDRILL OIL LANDRILL to Showcase New Dissolvable Bridge Plugs and Wellbore Cleaning Tools at NAPEC 2025
XI’AN, China – Xi’an Landrill Oil Tools Co., Ltd., a leading supplier of oilfield equipment and technology, is pleased to announce its participation at the 13th North Africa Petroleum Exhibition & Conference (NAPEC 2025) in CCO Oran, Algeria from October 6-8, 2025. We cordially in...Read more -
Key Downhole Tools: A Comprehensive Guide to the Classification and Application of Roller Cone Bits and Diamond Bits
01 Roller Cone Bits: Versatile Tools for Adapting to Formations Since their advent in 1909, roller cone bits have become the most widely used bit type in rotary drilling. Their unique multi-cone structural design enables them to adapt to various formation conditions, from soft to extremely hard. ...Read more -
What is FOSV?
Full-Open Safety Valve (for Drilling Operations): This is a manually controlled downhole valve used in drilling operations. It is operated via a dedicated wrench and serves as a blowout prevention measure by being connected between drill pipes. Commonly Used Full-Lift Safety Valve: This type refe...Read more -
What Role Does the Oil Drill Pipe Play in Oil Wells?
In oil and gas drilling operations, the oil drill pipe is a core downhole component that connects the surface drilling rig to the downhole drill bit. Its performance directly determines the efficiency, safety, and success of well construction. 1.Drilling Through Formations The oil drill pi...Read more -
What are the components of PDM Drill (Progressing Cavity Drill)?
The PDM Drill is a positive displacement downhole power drill that uses drilling fluid as power to convert fluid pressure energy into mechanical energy. Components The PDM Drill mainly consists of four major assemblies: bypass valve, hydraulic motor, cardan shaft, and drive shaft. The screw motor...Read more -
Eccentric Micro-Hole Reaming Tool Boosts Drilling Efficiency
Recently, the Well Drilling and Completion Technology Center of the Drilling Engineering Technology Research Institute has successfully developed an eccentric micro-hole reaming tool, which has achieved remarkable results in oilfield drilling operations and brought a new efficiency improvement so...Read more -
What is a Drilling Jar?
A Jar is a specialized tool used in oil drilling to free stuck drilling tools. It works by storing energy under tension and releasing it instantaneously to generate a powerful shock wave that acts on the stuck drill string, loosening and freeing it. Based on the operating mechanism, jars are main...Read more -
What Are the Common Types of Drill Bits in Drilling Operations?
The drill bit is a key component of drilling equipment. Its main function is to break rocks and form boreholes, and it is also one of the primary drilling tools. The specifications and shapes of drill bits should vary according to different working environments and geographical conditions. During...Read more -
Causes and Solutions to WOB Transfer Loss in Drilling
Concept, Phenomena and Hazards of WOB Transfer Loss Concept: During drilling, excessive friction between the drill string and wellbore wall prevents the weight on bit (WOB) from being transmitted to the drill bit—instead, the entire WOB is consumed by the drill string. This manifests as no pen...Read more -
What is Long Auger Drill and Short Auger Drill?
Long auger drills and short auger drills are two common drilling tools, mainly used for drilling operations in loose formations such as soil and sand-gravel. Their core difference lies in the length of the auger flights and applicable scenarios. I.Long Auger Drill (Full Auger Drill) 1.Wo...Read more
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