API standard High quality PDC bit for oil drilling

Product Details

Available in various sizes, customized tri-cone bits, 3 7/8", 4 1/2", 5", 6"cone bit, 7 1/2", 8 1/2"tri-cone bit, 9 1/2", 10 5/8", 11 5/8", 12 1/4" tricon bit, 13 5/8", 14 3/4", 15", 15 1/2", 16", 17 1/2" 1, 18", 19", 20", 22", 24", 26", 28", 30", rock bit. Metal seal, rubber seal, rolling bearing, plain bearing, used in different formations and The environment and quality are higher than those of similar manufacturers, and the price is slightly lower than that of similar manufacturers. Friends from all over the world are welcome to test and purchase our PDC bits.

In North America, operators are increasing drilling rates of penetration (ROP) and achieving less bit travel by using advanced conical PCD elements and rotary PDC cutter technology.

Advanced PDC technology

As oil and gas exploration and development in North America further intensifies, drill bit designers have embraced new technology with two new products that maximize the drilling capacity of the bit: a tapered PCD element that breaks rock more efficiently at the center of the bit , thereby increasing the drilling rate of drilling, and at the same time, the polycrystalline diamond composite (PDC) tool, by using its entire circumference diamond blade, rotates around its axis, effectively extending the drill bit stroke.

The conical PCD element and rotary PCD tool technology can be very helpful for oil and gas operators drilling well and can dramatically increase U.S. oil production through faster penetration rates and increased drill bit durability.

Tapered PCD element

Increase drilling ROP

Continuing efforts to develop more efficient polycrystalline diamond (PDC) bits, with an emphasis on bit cones, are due to two inherent inefficiencies: limited rock removal in the center of the wellbore due to the relatively low rotational speed of the center cutter; At this time, the potential for torque fluctuations of the drill bit requires that the tool center bear the maximum load capacity of the drill bit. These two inefficiencies limit drilling ROP, making it easier for the bit to disrupt the effectiveness of lateral/torsional shocks and vibrations.

The drill's designers theorized these cutter movements, believing that they would improve the drill's overall shear efficiency by stress relieving, developing the rock column, and then breaking it using conical polycrystalline diamond (PDC) elements. rock. The new element features a unique tapered geometry and an ultra-thick synthetic diamond layer that is twice as thick as conventional PDC tool diamond layers. Its materials are designed to provide high-quality abrasion and impact load resistance. To achieve maximum drilling capacity, an integrated bit design platform software was used to optimize tool structure and cutting model features.

This tapered diamond element is positioned in the center of the faceted structure with its tapered tip directed vertically downwards into the rock. When the drill bit rotates, the diamond element is mainly used for the rock column, which is a continuous heavy load point with a high axial pressure ratio, which can break the rock. This mechanism can ensure that the drill bit achieves the possibility of higher ROP and reduced vibration of the drilling machine. The fracture of the rock pillar also formed more debris fragments that could be used for further rock formation analysis.

Bottom hole profiles were verified through laboratory tests and drill bit characteristics and tapered diamond bits were studied. Drill a variety of rock formations using a fully pressurized drilling simulator, using conventional PDC bits and bits equipped with tapered elements. A careful study of the bottom hole patterns formed by the different bit types determined that the bit with the tapered element had produced a small diameter rock column in the center of the borehole. During drilling, the cuttings collected are much larger than those produced by conventional PDC bits.

Before field trials began, engineers determined that the existing bit design met expectations, but believed that further improvements were desired to increase overall drilling capacity. Modifications of these designs then included tapered elements and were evaluated for capability in the field. A detailed study of more than 30 individual drilling trips conducted in the Midwestern United States showed that with the new bit, more than 50% of the drilling trips were evaluated, higher than average drilling ROP, average drilling ROP increase The 20% offset should be within the bit travel. Average ROP increased by 25% in the Texas and Oklahoma Panhandle areas.

In the Williston Basin, North Dakota, USA, field testing of tapered elements has shown that PDC bits with better drilling capabilities can be transported out of the borehole in good, non-sharp bit conditions, shown on the tapered elements. No wear and tear. The new bit operates in a steerable drilling tool assembly through mixed interlayer sequences in similar vertical hole applications including sand-mudstone formations, salt and limestone/dolomite/anhydrite with an unconfined compressive strength range Is from 2000psi to 25000psi.

If the PDC bit does not have the conical element, it drills a 1,995m (6,583ft) geological section with a drilling ROP of 29.4m/hr) (97ft/hr); in contrast, the PDC bit is equipped with a conical element, Drilling a section of the same length, the drilling ROP is 61.5m/hr (203ft/hr). It is understood that, in general, the drilling ROP of the drill bit with the tapered element is 46% higher than the average drilling ROP of the other bits of 4.8m/hr (115ft/hr).

Rotating PDC cutters extend drill life

Although PDC bits and technology have been widely used for 40 years, there are currently inherent limitations of fixed PDC shear elements - only a relatively small portion of the cutting edge touches the formation and, therefore, only a small portion of the overall tool contributes to the bit's durability performance and drilling capacity.

When a stationary tool is used in the formation, the tool wears and breaks due to mechanical and thermal effects. This continued degradation of the cutting edge will result in a loss of shear efficiency, which will terminate the drill stroke.

The ONYX 360 Rolled PDC cutter was finally successfully developed after several years of determination of the ideal material, rolling mechanism and ability to improve drilling. The rolled PDC cutter is mounted on the drill body, which allows it to rotate freely. During drilling, according to the rotation of the cutter in the rock pocket, the entire circumference contacts the rock, which redistributes the wear, so that it ensures that the sharpness of the diamond cutter remains longer throughout the drilling process. Because these are cooled more efficiently inside, the tool lives downhole longer, resulting in further bit life. To evaluate the durability of the hob, extensive laboratory tests were done. In drilling a granite test specimen, the new tool demonstrated a six-fold increase in service life compared to high-end stationary tools. Analysis of the sharpness of the hob shows that it rotates as a whole and even wears its entire 360° circumference. Field testing of hob cutters, the technology was placed in an application environment where conventional PDC bits experience severe wear over relatively short strokes.

Granitic sandstone formations are composed of quartz, feldspar, and quartz/calcite cements. This formation is typically explored using a steerable motor bottom hole assembly, which is primarily long lateral drilling to help increase reservoir contact.

PDC bits are equipped with rotating PDC cutters that sit adjacent to stationary cutters, which measure the drilling capability and wear characteristics of the hob cutter. These bits have consistently increased footage by 20% or more in granite sandstone formations, and evaluation of tool sharpness has shown no loss of tool efficiency and 100% tool rotation. Conventional stationary PDC elements showed wear flakes T1, even higher, while rotating PDC cutters showed evenly distributed wear scars across the diamond edge.