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Strict quality process control and management ensures
product quality and accountability.


Email : ROLLSBREA[email protected]


Worktime : 08:30-17:30 (Beijing Time)


  • ASV focuses on operator comfort and

    The loaders' drive motors transfer torque to the patented internal-drive sprockets, while internal rollers reduce friction loss in the undercarriage, allowing for maximum performance. An advanced cooling system helps contractors operate MAX-Series machines at 100 percent load, 100 percent of the time.

  • Optimization of Thermal Friction Drilling Process Based on

    Thermal friction drilling is a nontraditional drilling method that utilizes the heat generated from the friction interface between a rotating conical tool and the workpiece, and the heat will soften the workpiece and facilitate the tool to penetrate into the workpiece plate. Since it is no-chip process, the surface of the

  • Abradable Materials for Clearance Control

    Abradable coating solutions improve safety while reducing fuel consumption and emissions in turbomachinery. Whether aviation or power generation gas turbines, steam turbines or turbochargers, we have abradable materials for your clearance control applications.

  • Abradable Materials for Clearance Control

    Abradable coating solutions improve safety while reducing fuel consumption and emissions in turbomachinery. Whether aviation or power generation gas turbines, steam turbines or turbochargers, we have abradable materials for your clearance control applications.

  • 54 Listings

    Find dozer auctions, wheel loader auctions, excavator auctions, skid steer, motor grader, crane, crawler loader, crawler dozer, and scraper auctions, plus much more. These online auctions take place each week, standard bidding begins 7 days before the close of each online heavy equipment auction.

  • US20030062198A1

    A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down some of the annuli; returning the fluid up at least one annulus so that the return flow creates adequate hydraulic friction within the return annulus to control

  • Guide rope | Teufelberger

    The guide ropes for this purpose are half-locked or full-locked coil steel wire ropes featuring the following important rope characteristics: Smooth outer surface of the rope and therefore low friction. Big outer wires (increasing the lifetime in terms of wear) Relatively high stiffness. Low rope elongation ensuring increased system reliability

  • BSP Vertical Drills For Sale

    Has 4 x 12m friction Kelly bar Max torque - 10,000kgm Suitable for drilling up to 42m deep Well maintained & serviced regularly Good condition Perkins engine Clark Transmission Updated: Thu, April 29, 2021 12:14 AM

  • Drill Pipe Selection Guide: Types, Features, Applications

    Drill pipe is hollow, thick-walled piping that transmits drilling fluid and torque through the wellbore to the drill bit on a drilling rig. It is manufactured to withstand severe internal and external pressure, distortion, bending, and vibration as it both rotates and lifts the bottom hole assembly (BHA). Drill pipe is threaded on each end in a

  • ASV focuses on operator comfort and

    The loaders' drive motors transfer torque to the patented internal-drive sprockets, while internal rollers reduce friction loss in the undercarriage, allowing for maximum performance. An advanced cooling system helps contractors operate MAX-Series machines at 100 percent load, 100 percent of the time.

  • MPD 101 : Beyond Energy

    With MPD, since the closed system allows drilling while flowing (flow drilling), the well can still be depleted as the drilling operation continues, saving the customer days of rig time. The savings are substantial, especially if several over-pressurized fractures can be encountered while drilling the well.

  • Method and system for hydraulic friction controlled drilling

    A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down some of the annuli; returning the fluid up at least one annulus so that the return flow creates adequate

  • MPD 101 : Beyond Energy

    With MPD, since the closed system allows drilling while flowing (flow drilling), the well can still be depleted as the drilling operation continues, saving the customer days of rig time. The savings are substantial, especially if several over-pressurized fractures can be encountered while drilling the well.

  • US20030062198A1

    A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down some of the annuli; returning the fluid up at least one annulus so that the return flow creates adequate hydraulic friction within the return annulus to control

  • Drill Pipe Selection Guide: Types, Features, Applications

    Drill pipe is hollow, thick-walled piping that transmits drilling fluid and torque through the wellbore to the drill bit on a drilling rig. It is manufactured to withstand severe internal and external pressure, distortion, bending, and vibration as it both rotates and lifts the bottom hole assembly (BHA). Drill pipe is threaded on each end in a

  • US20030062198A1

    A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down some of the annuli; returning the fluid up at least one annulus so that the return flow creates adequate hydraulic friction within the return annulus to control

  • Telescopic Joint (Slip Joint) Packers | LORD Corp

    Deepwater rigs use telescopic joints, or slip joints, to connect to a drilling riser and accommodate vertical motion from vessel heave. The elastomeric seals in these joints experience extreme friction, resulting in material loss. Seals designed with LORD wear-resistant nitrile have been shown to last 20X longer than traditional nitrile.

  • China Rotary drilling machine, drilling rig, XR150D, drilling

    Contacts Michelle Cao Tel:+86 157 5556 5618 What's app&Wechat: +86 157 5556 5618 High drilling capacity 14-19m friction Kelly, 14-19m interlocking Kelly made of high strength steel tubes are available; Maximum output torque reaches 360kN.m, the maximum pile depth is 106m down, maximum pile diameter is 2500mm, 3000mm after remove the lower mast.

  • Lofrans Kobra Horizontal Windlass

    Information. View Download. Lofrans Kobra is a superb horizontal windlass with a difference: The motor is housed partially under the deck in a vertical orientation, but the drum and gypsy still rotate on a horizontal axis well clear of the deck. The result is maximum drop for the chain into the locker together with minimal footprint on deck.

  • ROCKitĀ® System | Nabors

    Overcome low ROP when sliding by allowing the directional driller to oscillate the drill pipe left and right while slide drilling. The amount of oscillation can be adjusted to avoid rotating the mud motor and bit while maximizing friction reduction.

  • Cougar Drilling Solutions

    Cougar Drilling Solutions is a leading manufacturer and supplier of downhole tools, based in Canada. Established in 1969, we have years of experience in the direct management of complex drilling projects. With a footprint all around the globe, we have delivered downhole drilling tools, services, and solutions for crucial oil and gas operations.