Overview of Weight Indicators

The Weight Indicator is a device used in drilling engineering to display the change of the drilling pressure and its relationship with the weight of the drilling tool. The driller masters the working parameters of the drilling rig and workover rig during drilling or workover operations and judges the working status of the drilling tool. 

The Weight Indicator consists of pressure sensors and corresponding instruments. The pressure sensor is installed on the dead end of the wire rope of the pulley system (called a dead rope). There are two types of hydraulic and electric. It can reflect the pulling force on the dead rope through the instrument, and this pulling force is proportional to the hanging load on the hook. Therefore, with the help of the weight Indicators, it is possible to understand the working conditions of the drilling tool in the well and perform correct operation. Weight Indicator can be divided into two categories, hydraulic and electronic, according to their working principles. What is commonly used now is the hydraulic weight gauge.

Weight indicator suitable for drilling and geological exploration drilling rig or workover process instructions and record the drilling hanging weight and WOB change, it can help drillers to master the working parameters and judge the working state of drilling tools. Weight indicator by the deadline anchor, weight secondary table (weight indicator and recorder).The instruments work environment temperature: -40~50℃

The pressure sensor is installed on the dead end of the steel wire rope of the pulley system (called a dead rope). Through the instrument, the tension on the dead rope can be reflected, and this tension is proportional to the suspension load on the hook. Therefore, with the help of the weight Indicator, it is possible to understand the working conditions of the drilling tool in the well and perform correct operation.

The modern Weight Indicators refers to the design concept of combining the two instruments of the Weight Indicators and the sensitivity meter. There are respectively one finger weight and one sensitivity spring tube in the watch. The free end of the spring tube is displaced under the action of the liquid pressure, and the gear shaft is rotated through the connecting rod of the amplifying mechanism and the bevel gear, so that the pointer is deflected, thereby indicating the hanging weight of the hook and the drilling pressure.

Weight Indicators of the same model and specification have different measuring ranges depending on the number of cables worn by the traveling block, so they should have different scales.

Features of Weight Indicators

The pressure chamber is connected with the Weight Indicators and the recorder through the oil pipeline, and the hydraulic signal can be sent to the recorder to drive the action of the recorder pen, and at the same time, the hydraulic signal is transmitted to the Weight Indicators.

Weight gauges of the same model and specification have different measuring ranges depending on the number of cables worn by the traveling block, so they should have different scales. Take the weight watch with 10 strands of rope as an example: the weight dial is yellow on a black background, and its circle is engraved with a scale of 0-2400 evenly divided, so each grid represents 20 kN, and the central axis is equipped with a yellow needle. The tube drives the rotation with a maximum deflection angle of 375°. The outer dial with a ring is a sensitive dial, and an adjusting pinion is installed on the edge, and the sensitive dial can be moved through the handle. The sensitive dial can be rotated arbitrarily within the range of 360°. The sensitive dial is white on a black background, engraved with o-600 evenly divided scales, and each division is 10 kN. A red needle is installed on the central shaft for indication, driven by a spring tube to rotate, and the maximum deflection angle is 4 times of the rotation angle of the pointer of the weight gauge. The dials of the Weight Indicators and the sensitive meter should be selected according to the number of ropes of the drilling rig. There are also dials with 8-strand ropes and 12-strand ropes, which can be selected according to needs.

Weight Indicators consist of

The modern Weight Indicators refers to the design concept of combining the two instruments of the Weight Indicators and the sensitivity meter. There are respectively one finger weight and one sensitivity spring tube in the watch. The free end of the spring tube is displaced under the action of the liquid pressure, and the gear shaft is rotated through the connecting rod of the amplifying mechanism and the bevel gear, so that the pointer is deflected, thereby indicating the hanging weight of the hook and the drilling pressure. There are two scales on the dial, the inner scale indicates the total hook load (weight), while the outer scale indicates the net bit pressure (sensitivity). The scale on the outer ring is four times larger than the scale on the inner ring. Under normal circumstances, the drill bit is lifted from the bottom of the well, and the driller aligns the zero point of the outer dial with the pointer. At this time, the scale value of the inner ring is the hook weight W hang, and the weight on bit W drill indicated by the outer dial is zero. When drilling, as the drill bit is pressed into the formation, the load of the hook decreases, and the scale value of the outer circle correctly represents the weight on bit W drill value.

Dead line retainer

Weight secondary table

Weight indicator

Logger

Applications of Weight Indicators 

The Weight Indicator is used to measure the size and change of the hanging weight of the drilling tool and the weight on bit. According to the size and change of suspension weight and weight on bit, understand the working conditions of the drill bit and drill string, and guide the handling of complex downhole situations such as drilling and fishing operations.

Price of Weight Indicators

The Weight Indicators Price will change randomly with factors such as production cost, transportation cost, international situation, exchange rate, market supply and demand of raw materials. Sino Mechanical, as one of global weight indicators manufacturers, aims to provide you with high quality and best price Weight Indicators. If you are looking for Weight Indicators or Weight Indicators spares, please kindly contact us to get the latest Weight Indicators price.

Weight Indicators Supplier

Sino Mechanical, as a Weight Indicators manufacturer, has more than 20 years extensive experiences in the performance, application and cost-effective manufacturing of Weight Indicators. We are global Weight Indicators supplier. We offer a wide range of drilling equipment and have Weight Indicators for sale. We also provide OEM services. We design, manufacture, and sell Weight Indicators for your drilling applications. If you want to know latest Weight Indicators price , don’t hesitate to contact us anytime. We will get back to you within 24 hours.