NOV的定向钻进技术值得信赖！
编译 | 惊蛰 TOM
NOV（国民油井）公司的VectorZIEL与VectorEXAKT旋转导向钻井系统（RSS）性能出众，在实际应用中经受住了各种严峻的挑战，是最早可追溯至用于钻深矿井的高精度工具之一。VectorZIEL与VectorEXAKT系统由德国专业设计团队开发，可在直井、定向井与水平井中提供符合行业标准的导向功能。
这两种系统适用于所有常见的井眼尺寸，同时拥有多项优势，包括：1设备紧凑短小，套筒设计不旋转，带有四个导向脊，即使在严重的粘滑条件下也能实现精确的方向控制；2井斜角、方位角与伽马的近钻头测量，可在距钻头仅3英尺（1米）处实现连续与静态测量；3集成式泥浆马达与泥浆脉冲发生器采用短小、集成的设计理念，且作业成本低；4闭环轨迹控制可提供自动造斜、转向以及稳斜功能，无需太多地面控制。
VectorZIEL与VectorEXAKT系统采用业内领先的Tolteq泥浆脉冲发生器，可结合NOV公司的对称传播电阻率LWD工具，来进行额外的实时地层评估测量。开发商可以购买这些工具，并由NOV的全球维修基地提供技术支持。利用这些工具，定向井工程师能够在全球市场中提供顶级的定向服务。
在租赁方式应用中，VectorZIEL与VectorEXAKT系统已应用于全球55口井，累积进尺超过23万英尺(7万米)。出售的系统已超过40套，并应用于更多的井。租赁该系统进行作业，循环时间多数都超过200小时，证明了该系统的稳固性。
NOV相关负责人表示：“VectorEXAKT垂直旋转导向系统（RSS）专为垂直钻进作业而设计，VectorEXAKT系统凭借其机械钻速快、垂直控制精确以及稳固性而独树一帜。”
VectorEXAKT旋转导向系统通过连续导向来保持正确的钻进方向。当轨迹偏离垂直方向时，系统将自动导向至设计轨迹。还可在泥浆马达下方安装VectorEXAKT系统，使钻进作业更为高效。
特点/优点
由于以上两种作业系统为集成式MWD系统，能够：1提供实时井斜与伽马的近钻头测量反馈；距钻头4英尺处形成闭环垂直控制，可提供定向与地层信息，且无需地面干预；3自动控制与保持垂直井眼，可与NOV公司的MWD与LWD系列工具组合使用；4将钻进与测井BHA完全集成于一个短小、不旋转的套筒内，且带有四个导向脊；5哪怕在严重粘滑的条件下，也能提供精确的垂直控制。
Vector旋转导向系统
NOV的Vector旋转导向系统在中东/北非地区实现了首次商业应用。在钻进硬夹层地层时，客户要求从2.5度降斜至0度，并稳斜至井底。VectorEXAKT800旋转导向系统被集成于BHA中，并且单个工具两趟钻完成了整个12.25英寸井段的钻进。出上层套管鞋后，该系统就将井斜角从2.5度降斜至0度，并在整个3028英尺（923米）的井段中，维持0.1度以内的井斜，直到钻至目标井深。通过使用VectorEXAKT工具，开发商现在可以开发难度更大的油藏，包括大尺寸井眼的垂直旋转导向钻井服务。
定向测量与导向技术部门总经理Andrew Craig说：“我们很高兴在中东与北非地区完成了Vector RSS工具的首次应用。NOV公司在开发旋转导向工具组合方面投入大量资金，以满足当今钻井挑战的需要。我们很高兴地看到，将这项关键技术推向市场，使我们的客户能够提高他们的定向能力。”
VectorEXAKT 800旋转导向系统可在垂直或倾斜井眼中提供更高的机械钻速，以及精确的方向控制。该集成式钻进与测量工具拥有距钻头5英尺的井斜测量套件，并配有脉冲发生器以提供实时数据传输。
VectorZIEL旋转导向系统
VectorZIEL旋转导向系统是用于三维钻进的自动导向工具。该系统拥有更快的机械钻速、更好的井眼清洁以及更精确的井眼轨迹控制，有助于以更低的作业成本完成更高质量的井眼。
“在过去二十年内，我们开发并改进了高级旋转导向系统，最终发布了VectorZIEL系统。该系统即使在最严苛的钻井环境中，也能提供可靠且精确的方向控制。该系统可供购买与租赁，并由NOV的全球维修基地提供技术支持，使定向井工程师可在全球范围内提供先进的定向钻井服务。”
NOV的VectorZIEL600旋转导向系统（RSS）可提供更高的机械钻速，更平滑的井眼，以及精确的方向控制，从而减少定向井与水平井的建井成本。该系统可在距钻头5英尺内测量井斜角、方位角、伽马，并且拥有集成脉冲发生器，可供全球定向井工程师以及作业者使用。
客户需要钻8.5寸井眼，穿过具有挑战性的硬质石膏、砾岩与软砂泥岩夹层，并将井斜角严格控制在20度。使用VectorZIEL旋转导向系统成功钻穿该井段，狗腿度为6至8度/100英尺，平均机械钻速为30英尺/小时，成功完成了2200米井筒的定向钻进，为客户节省了大量的作业时间和成本。
NOV’s VectorZIEL? and VectorEXAKT? rotary steerable systems (RSS) have a legacy of proven performance over the last 30 years, dating back to their initial application of drilling deep vertical mine shafts with high precision. The VectorZIEL and VectorEXAKT systems have been developed by a dedicated engineering team in Germany to provide industry-standard steering performance in vertical, directional, and horizontal applications.
?The systems are available for all common hole sizes, while providing several benefits, including:
- Short, nonrotating sleeve design with four steering ribs for accurate directional control even under severe stick-slip conditions
- Near-bit inclination, azimuth, and gamma measurements, providing both continuous and static surveys at only 3 ft (1 m) from the bit
- Integrated mud generator and mud pulser enable a short, integrated tool design with low operating costs
- Closed-loop trajectory control provides automated build, turn, and hold capabilities with limited interaction from surface required
The VectorZIEL and VectorEXAKT systems feature industry-leading Tolteq? mud pulsers and can be combined with NOV’s symmetric propagation resistivity LWD tool for additional real-time formation evaluation measurements. Available for purchase and supported by NOV’s global R&M infrastructure, these tools allow independent directional drillers to provide top-tier directional services in the global marketplace.
In the rental market, the VectorZIEL and VectorEXAKT systems have been used to drill more than 230,000 ft (70 000 m) in more than 55 wells around the world. Additional wells have been drilled using the 40-plus customer-purchased tools. More than 50% of the rental runs with the VectorZIEL and VectorEXAKT systems have been for more than 200 circulating hours in duration, demonstrating the tools’ robust design.
Our VectorEXAKT vertical rotary steerable system (RSS) is designed for high performance in vertical drilling operations. The VectorEXAKT system is set apart by its high rate of penetration, precise verticality control, and robust design.
Description
The VectorEXAKT RSS stays on course through continuous steering—when there is a deviation from vertical, the system will autonomously steer back on course. You can also run the VectorEXAKT system below a motor for performance drilling applications.
Features/Benefits
Integrated MWD system
- Provides real-time feedback while drilling?Near-bit inclination and gamma measurements
- Delivers directional and geological information within 4 ft of the bit?Closed-loop vertical control that requires no intervention from surface
- Steers and maintains a vertical hole autonomously?Can be combined with NOVs MWD and LWD tool portfolio?
- Allows the construction of a fully integrated drilling and logging BHA?Short non-rotating housing with four steering ribs?
- Provides accurate vertical control even under severe stick-slip conditions
We are pleased to announce the first commercial run for our Vector rotary steerable system (RSS) in the Middle East/North Africa (MENA) region. While drilling in a hard, interbedded formation with significant dips, our client needed to drop from 2.5° and hold vertical for the remainder of the well.
Our VectorEXAKT? 800 RSS was integrated into the BHA, and a single tool drilled the entire 12?-in. section in two bit runs. The VectorEXAKT RSS immediately reduced casing-shoe inclination from 2.6° to vertical and maintained verticality within 0.1° for the entire 3,028-ft (923-m) section until target depth was reached. With access to our VectorEXAKT tool, our client can now expand their service offerings to include vertical RSS drilling services for large-diameter boreholes.
“We are thrilled to complete the first run of our Vector RSS tools in the important MENA region,” said Andrew Craig, Managing Director for Directional Measurement and Steerable Technologies. “NOV has made a significant investment in developing a portfolio of RSS tools that meets the needs of today’s drilling challenges. We are excited that making this critical technology available to the market will enable our customers to grow their directional capabilities.”
Our VectorEXAKT 800 RSS delivers higher ROP and precise directional control in vertical or inclined boreholes. This integrated drilling and measurement tool incorporates an inclination survey package within 5 ft of the bit, along with a pulser to deliver real-time data transmission. Visit our VectorEXAKT RSS product page to learn how you can steer your operating costs in the right direction.
VectorZIEL Rotary Steerable System
Smart Drilling GmbH is now part of NOV and the RSS tools are now offered through NOV ReedHycalog as the VectorZIEL and VectorEXAKT products – formerly known as the Smart Drilling Scout and ZBE tools, respectively. The VectorZIEL? rotary steerable system (RSS) is an automatic steering tool for three-dimensional drilling. Offering higher ROP, improved cuttings removal, and precise trajectory control, the system helps you produce higher quality boreholes at reduced operational costs.
We have developed and refined a premium RSS over the course of the past two decades, culminating in the release of the VectorZIEL system. The VectorZIEL system offers reliable and precise directional control in even the most demanding drilling applications. The system is available for purchase or rent and is supported by NOV’s global maintenance infrastructure, enabling directional drillers to offer high-tier directional drilling services around the world.
Features/Benefits
- Integrated MWD system for real-time feedback while drilling
- Near-bit inclination, azimuth, and gamma measurements
- Closed-loop trajectory control, which requires minimal intervention from surface
- Automated downlinking using surface downlink skid
- Can be combined with our MWD and LWD tool portfolio for an integrated directional drilling and logging BHA
RSS tool successfully drills 2,200-ft tangent through challenging formation
NOV’s VectorZIEL? 600 rotary steerable system (RSS) delivers higher ROP, smoother boreholes, and precise directional control to reduce drilling and well costs in directional and horizontal wells. Our technology has inclination, azimuth, and gamma ray within 5 ft of the bit along with an integrated pulser and is available to independent directional drillers and operators globally
The client needed to drill an 8?-in. hole through challenging hard anhydrite, conglomerates, and interbedded soft silt stone to be at 20° tangent with tight directional control.
Successfully drilled the section using the VectorZIEL RSS with dogleg severity of 6 to 8°/100 ft at an average ROP of 30 ft/hr