overshot assembly quotation

Overshots are a key component of wireline coring systems. To retrieve the core sample, the overshot is lowered into the hole on a wire cable until it comes in contact with the spearhead point on the head assembly. Positive latching lifting dogs securely attach, and the inner tube assembly is pulled from the hole to retrieve the core. V-lock Overshots Hole Products" V-lock overshots are safe, reliable, fast, and easy to use. The automatic safety feature is designed to reduce the chance of an accidental release. When the inner tube assembly is attached and lifted, the lifting dogs automatically retract into position. No extra manual steps are required to activate the safety feature, thus reducing the potential for human error. Standard Overshots Hole Products" standard overshots feature a manual safety lock pin. Once the core filled inner tube is hoisted above the top of the drill rods the safety lock pin can be inserted through the overshot head and under the spearhead point. This will allow the operator to hoist and remove the core sample from the inner tube.

Boart Longyear’s overshots are an integral part of the Q™ Wireline system. Once the inner-tube is full of core, the overshot is lowered (or pumped-in for an inclined-hole) to the bottom of the hole. Its heavy-duty lifting dogs grab a secure hold at the top of the inner-tube assembly.

For maximum productivity in underground or pump-in applications, the Quick Pump-In™ Overshot provides significantly improved pump-in rates with dual pump-in lip-seals; as well as new ‘V-Lip’ pump-in seals in NQ™ and HQ™ sizes. The variable profile of the ‘V-Lip’ seal provides improved performance and accommodates both standard wall and W-Wall™ drill rods when used with the new Roller Latch™ underground head assembly.

In addition, this overshot incorporates the proven Boart Longyear™ “Landing Indicator” ball and bushing. The ball and bushing provide a pump-in valve, a bypass valve, and a landing indicator pressure signal.

Improve your team´s efficiency by doing two tasks at once. With our Core Retriever™ overshot assembly, you can pull core and survey simultaneously. In combination with our solid-state north seeking GyroMaster™ downhole survey tool, Core Retriever™ increases drilling productivity and delivers great results.

The LiMAR Slimline Cutting Overshot is used to snip and retrieve stuck Coiled Tubing Strings in situations where retrieval of the entire string and BHA has proven unsuccessful.

The Overshot has been designed to minimise wall thickness and also offer maximum strength, providing a solution to latch and cut Coiled Tubing through the most challenging of well-bore restrictions. The tool features a shearable bowl which at a predetermined over-pull allows the cutting blades to engage the Coiled Tubing String and sever the tubing leaving a clean profile, free of sharp edges.

Explore the various drilling overshot products available for wholesale at Alibaba.com. Get a drilling overshot for drilling water wells, water exploration holes, geological exploration, coal mines, and other kinds of mining. Some drilling overshot options use caterpillar tread to move. Others use rubber tires, while others require a separate means of transport. Caterpillar tread propulsion can climb up to 25 degrees inclination. Some products in the range are capable of drilling over 200 meters, while others are only used for open-pit mining with depths of around 3 meters. Drilling can be done vertically downwards, horizontally, or in a slanting direction. Drilling speed depends on the power of the machine and the general hardness of the surface. The hole diameter can vary from 90mm to 200mm.

drilling overshot options also include an air compressor, a mud pump, drilling rods of various sizes, connectors, and a drilling tower. Drilling is done using drill bits of various shapes, sizes, and compositions. You can choose between diamond bits, alloy ring-shaped bits, 3-wing alloy bits, PDC bits, and hammer bits. Each drill bit uses different drilling methods, including rotary, percussion, blast hole, and core drilling.

Smaller products have a lifting power of around 25 kilonewtons and weigh about 2,500kgs. They’re ideal for small-scale drillings such as farms and homes. Larger ones are faster with more power, making them ideal for commercial use. Browse through Alibaba.com and find a drilling overshot that’s ideal for your work scope. Buy mine drilling rigs for your wholesale business at competitive prices. Chinese wholesalers provide you with customization options and great after-sales services.

The Coil Solutions Overshots are used to engage and pull a fish from the well bore. It uses a grapple to bite into the outside of the fish and releases by following through a predetermined rate to disengage the grapple. The tool comes with a range of grapples to accommodate various fish sizes.

The Quick Descent™ Roller Latch™ head assembly continues to build on Boart Longyear’s legacy of innovative drilling technology and offers precise compatibility with all Genuine Q™ wireline systems.

Ultra-reliable roller technology eliminates the low strength, play, and jamming associated with traditional ‘swing-out’ latch mechanisms. Roller latches detent into retracted position to eliminate latch drag for increased tripping speed, particularly in V-Wall™. Roller latches overcome the detent upon landing or alternatively can be positively driven to deployed position with fluid pressure or with drill rotation centrifugal force. Under drilling rotation, roller latches self-lock into the locking coupling integrated latch seat to drive the head assembly, eliminating adapter couplings and locking coupling tangs.

Boart Longyear’s overshots are an integral part of the Q™ Wireline system. Once the inner-tube is full of core, the overshot is lowered to the bottom of the hole. Its heavy-duty lifting dogs grab a secure hold at the top of the inner-tube assembly.

The Ezy-Lock sleeve provides a quick, one-handed rotation of the sleeve 90° to lock the overshot lifting dogs to the spearpoint and protects against accidental release.  When combined with the use of the safety pin, the overshot minimizes the chances of accidentally dropping the inner tube assembly during handling.

The Ezy-Lock overshot features upgraded components, heavy duty lifting dogs, two compression springs for improved durability and a new re-usable press-fit pivot-pin, eliminating peening in the field for easy lifting dog maintenance.

The Ezy-Lock overshot has an upgraded threaded connection between the jar staff and overshot head for improved strength. The jar staff itself is high-strength alloy steel with an increased diameter and fail-safe stop to reduce the chance of fatigue failures.

MKII™ spearhead assembly for added strength and safety features self-lubricating nylon to reduce wear, self-centering spearpoint with multiple detent positions, and an innovative design to eliminate pinch points.