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RDT推出全新高性能钻井马达-石油圈

2019-10-09 黑龙江-佳木斯-前进区
所在地区:
黑龙江-佳木斯-前进区
发布日期:
2019年10月9日
建设快讯正文

RDT推出全新高性能钻井马达

Rival Downhole Tools利用其优秀的钻井马达工具,帮助开发商提高了作业效率。

编译 | 惊蛰

近日,Rival Downhole Tools(RDT)与美国一家油田服务商签订了为期五年的钻井马达工具供应合作协议,通过利用自身的工程服务能力,来有力支持客户大幅攀升的定向钻井业务。该公司计划后续加快在多个油气盆地的运营步伐,以便与钻井业务更好对接。

RDT公司最近转型为一家工具及服务供应商,可提供的工具主要包括创新性兼高可靠性的钻井马达以及拥有专利权的降低磨阻工具。随着这份长期协议的签订,该公司目前管理着北美市场最大的钻井马达车队之一。

RDT公司CEO Neil Fletcher表示:“当前,油气行业的钻井马达市场竞争异常激烈,交易也极其频繁。这份长期协议的签订体现了我们公司的团队价值,以及我们产品和服务的质量水准。这份协议在未来几年为我们公司所提供的发展助力及稳定性是前所未有的,将使我们能够为美国的所有客户提供重要的服务价值。”

高性能钻井马达(Rival PDM)生产线,是RDT公司截至目前应用专利化泥浆润滑轴承技术最先进的生产线。Rival PDM的设计目标,是在所有应用条件下都能满足井下性能需求与可靠性要求。通过与业界领先的Power Section制造商合作,确保开发商可以放心使用。通过将Rival PDM及配套PDMct工具配合油管使用,以及将Rival HDM(Hammer Drill Motor)及配套HDMct工具应用于冲击钻井等方式,来持续促进新型马达工具的研发。

主要特性:

  • PDMct工具尺寸包括2.88英寸与3.13英寸,PDM工具尺寸包括5.12英寸、7.12英寸与8.5英寸;
  • HDMct工具尺寸包括2.88英寸与3.13英寸,HDM工具尺寸包括7英寸与8.5英寸;
  • 内径增大型PDM衬套,能够传输更大的工作扭矩;
  • 弯头可调式马达,有效提高造斜速率;
  • 常规的硬质橡胶结合拥有EvenTek专利技术的动力单元。
  • 应用收益:

  • 利用高性能钻井马达来提高作业性能和机械钻速(ROP);
  • 利用“无行程”设计及维护理念来提高工具的可靠性;
  • 行业领先的RDT公司提供技术支持;
  • 马达部件包括顶部接头和转子制动器,可靠耐用。
  • 在马达的顶部末端是顶部接头,这是动力单元和BHA其余部分之间的转换外壳。大多数顶部接头能与API浮阀连接起来。此外,顶部接头还为转子制动器提供了一个阀座。转子制动器是一种锁扣装置,通过螺纹连接到转子顶部。它能在外部连接断开的情况下,将马达部件丢失的可能性降到最低。

    动力单元

    动力单元是由转子和定子组成的容积式马达。转子呈长螺旋轴形态,外部分布着一定数量的弯曲波瓣。定子是在定子弹性体内部有类似的螺旋剖面,波瓣数量会比转子多一个。这种设计的目的是形成一个可供泥浆流入的密封腔体。随着压力逐渐增大,压力迫使泥浆沿螺旋的空腔运动,就带动转子旋转而沿螺旋形线前进。通过这个转换过程,便将液压马力转换为驱使钻头旋转的机械马力。

    随着应用条件的不同,马达转子所配置的波瓣数量也会不同。一般情况下,波瓣较少的马达速度快、输出扭矩低,波瓣较多的马达速度慢、输出扭矩高。

    因为马达的动力单元为容积式结构,所以在运行过程中速度与扭矩值两者间是相互独立的。马达转速与泥浆排量成正比关系,排量越大,转速越高。输出的扭矩值与动力单元前后端压差成正比,而压差是通过对钻头施加载荷而产生的。因此,施加给钻头的钻压越大,压差就越大。

    对于每种型号的马达动力单元,其所能承受的压差都是有限制的。如果压差超过弹性体上限,定子外壳便不能保持泥浆在密封内腔内流动,进而导致转子和钻头停止转动。这就是通常所说的马达失速,会对定子弹性体及其他BHA单元造成损坏。

    稳定器

    为了适应钻井的需要,马达钻具的传动轴总成的外壳上配有不同种类的稳定器,有可换套式和固定式。其中,可换套式是丝扣连接到轴承座上,而固定式是直接集成在轴承座上。稳定器有助于保持特定的井斜角。随着钻井井斜角的变化,马达本体所承受的应力也不断变化,稳定器能有效减轻这种变化对工具的消极影响。一般情况下,稳定器外径尺寸选择应比井眼尺寸小1/8英寸。

    Rival Downhole Tools has secured a five-year collaborative supply agreement for drilling motors for U.S. land from a major oilfield services provider. Rival will utilize its engineering and operational capabilities to support the customer’s substantial and growing directional drilling business. Rival will also accelerate the growth of its operational footprint into multiple basins to optimize its proximity to drilling activity.

    Rival Downhole Tools recently transformed itself into a provider of innovative and highly-reliable downhole drilling motors, proprietary friction reduction tools, and engineering services. With the securing of this long-term agreement, Rival now manages one of the largest active drilling motor fleets in North America.

    “The domestic motor market is exceedingly competitive and extremely transactional. This type of long-term commitment speaks to the value of the team we’ve built and the quality of our products and services,” says Neil Fletcher, CEO, Rival. “The growth trajectory and stability this agreement affords Rival for years ahead is unprecedented. It will enable us to deliver significant value to all of our customers in U.S. land.”

    The Rival Performance Drilling Motor (Rival PDM) is the most advanced line to date of Ashmin patented mud lube bearing technology. The Rival PDM is designed to exceed downhole performance and reliability requirements in all applications. We’ve partnered with the industry leading powersection manufacturers to ensure our customers can count on their Rival PDM. We continuously advance our motor platform into thru tubing applications with the Rival PDMct and incorporate percussion drilling with the Rival Hammer Drill Motor (Rival HDM and HDMct).

    Key Features:

  • PDMct sizes of 2.88″, 3.13″ and PDM sizes of 5.12″, 7.12″ and 8.5″
  • HDMct sizes of 2.88″, 3.13″ and HDM sizes of 7″ and 8.5″
  • Expanded ID of PDM housings to incorporate higher torque transmissions
  • Adjustable-bend PDM build rates typical of industry’s fixed-bend motor offering
  • Conventional, hard rubber & EvenTek? powersections
  • Customer Benefits:?

  • Improved performance and ROP via higher performance motor platform
  • Increased reliability via “no trip” design and maintenance philosophy
  • Support from industry leading Ashmin Engineering
  • Motor Components:Top Sub & Rotor Catch

    At the top end of the motor is the top sub, which is a crossover housing between the power section and the rest of the BHA. Most top subs accommodate API float valves. The top sub also provides a seat for the rotor catch system.

    The rotor catch is a retaining device which minimizes the possibility of losing motor components downhole in the unlikely event that an external connection breaks or backs-off. The rotor catch is attached to the top of the rotor by a threaded connection.?

    Power Section

    The power section is a positive displacement motor comprised of a rotor and a stator. The rotor is a long, spiral shaft with a number of external, curved lobes. The stator has a similar spiral profile formed internally by the stator elastomer, but is designed to have one more lobe than the rotor.?

    The design results in a cavity for fluid to flow into. As pressure increases, the cavity progresses down the rotor by forcing the rotor to rotate and progress around the spiral profile. This action converters hydraulic horsepower into mechanical horsepower delivered to the drill bit.

    The desired lobe configuration will vary depended on the application. In general, a power section with fewer lobes generates a lower torque and higher speed, and a power section with more lobes generates a higher torque and lower speed.?

    Since the power section is a positive displacement motor, speed and torque are determined independently from each other during operation.?

    The rotational speed is proportional to the fluid flow rate through the power section. The higher the flow rate, the higher the output speed.?

    The torque generated is proportional to the differential pressure across the power section. Differential pressure is created by applying a load to the bit, thus the more weight applied to the bit, the higher the differential pressure across the power section.?

    For each power section configuration, there is a limit to how much differential pressure the power section can handle. If the differential pressure increases beyond the elastomer limitations, the power section will no longer keep the fluid cavities travelling down the rotor separate from each other causing the rotor, and thus the bit, to stop rotating. This is commonly known as a stalled motor and can cause damage to the stator elastomer, motor, and other BHA components.

    Stabilizers

    Stabilizers are available as removable or integral stabilizers. The removable stabilizers are threaded on to the bearing housing, whereas the integral stabilizers are directly integrated in the bearing housing.?

    A stabilizer can assist in maintaining a particular hole angle, and increase the yield of the motor with regards to angle change. Calculated build rates for stabilized motors are based on stabilizers that are 1/8” smaller than the hole size.

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