31results about How to "Extended bit life" patented technology

A rotary drill bit for drilling subterranean formations configured with at least one protective structure proximate to the rotationally leading and trailing edges of a gage trimmer, wherein the at least one protective structure is positioned at substantially the same exposure as its associated gage trimmer. Particularly, the apparatus of the present invention may provide protection for gage trimmers during drilling, tripping, and/or rotation within a casing; i.e., when changing a drilling fluid. Protective structures may be configured and located according to anticipated drilling conditions including helix angles. In addition, a protective structure may be proximate to more than one gage trimmer while having a substantially equal exposure to each associated gage trimmer. Methods of use and a method of rotary bit design are also disclosed.

A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a respective cutting structure with a minimal moment center located along each respective axis of rotation. Each respective bearing structure has a center point located proximate each respective minimal moment center.

A rotary drag bit exhibiting enhanced cutting efficiency and extended life is provided. The rotary drag bit comprises a bit body having a face surface, and a plurality of cutters coupled to the face surface of the bit body. The plurality of cutters comprises at least one pilot cutter and a rotationally trailing larger, primary cutter at substantially the same radius and, optionally of slightly less exposure. The pilot cutter is sized and positioned to pre-fracture the formation and perform an initial cut, while the primary cutter removes weakened, remaining formation material along the same rotational path. A method to pre-fracture subterranean formations using a rotary drag bit having a pilot cutter configuration is also provided.

The following invention relates to a drill bit that will drill a round and precisely sized hole when using a hand-held drill motor. The bit has a unique multi-angle lip relief that cuts faster than a standard drill bit and stays sharp longer as well.

An energizer for a mechanical seal assembly for use in a drill bit is disclosed. The energizer is a composite of at least two resilient materials, one having a durometer hardness that is greater than the other. The material contacting a journal provides relatively high frictional forces so as to prevent the energizer from rotating in relation to adjacent components. The relatively softer resilient material provides the energizing force necessary to maintain a good dynamic seal between the metal seal rings. The energizer components may be separate components that engage one another upon assembly, or may be bonded together to form a ring prior to assembly into the drill bit.

The present invention discloses, in certain asp cts, systems and methods for producing cyclical impacts and, in certain aspects for moving a drilling apparatus for drilling a borehole in a formation, the system in certain embodiments including a housing with a longitudinal axis and a movable member movably disposed therein and movable within the housing transversely to the longitudinal axis of the housing and positioned within the housing with a first space on a first side thereof and a second space on a second side thereof, the movable member substantially fluidly isolating the two spaces and movable to compress gas in one of the first space and the second space while decompressing gas in the other space so that a charge of compressed gas exits from the housing to move an impact member; e.g. for impacting a pile to be driven into the earth or for impacting a drill apparatus for drilling a wellbore, the movable member movable continuously to provide a series of impacts.

An earth-boring bit has a bit body with a depending bearing pin and a cone rotatably mounted thereon. A seal seals between the bearing pin and the cone. An annular set of bristles is located adjacent at least part of the dynamic seal surface of the seal to protect the seal against debris.

Disclosed are a variety of arcuate-shaped inserts for drill bits, and in particular, for placement in rolling cone cutters of drill bits. The arcuate inserts include 360° or ring-shaped inserts, as well as inserts of smaller arcuate length. The arcuate inserts are suitable for use in all surfaces of the rolling cone cutter, and in other locations in drill bits, and may have specialized cutting surfaces and material enhancements to enhance their cutting duty performance. Certain arcuate inserts may include stress relieving discontinuities such that, upon assembly into the cone or during drilling, the arcuate inserts may fragment in a controlled and predicted manner into shorter arcuate lengths.

The invention belongs to the field of hard and brittle material machining and provides a diamond drill bit composition used for sapphire bar drawing-out. The composition includes diamond and carcass powder. The carcass powder includes, by weight, 20-30 parts of superfine cobalt powder, 5-15 parts of nickel carbonyl powder, 0-20 parts of copper-tin pre-alloyed powder, 10-20 parts of superfine iron powder, 1-10 parts of phosphorus-copper powder, 5-15 parts of tungsten-copper pre-alloyed powder and 1-5 parts of beta-silicon carbide whiskers. The invention further provides a preparing method of the diamond drill bit composition used for sapphire bar drawing-out. A diamond drill bit used for sapphire bar drawing-out and prepared through the diamond drill bit composition used for sapphire bar drawing-out has the beneficial effects that both toughness and embrittlement are good, the diamond exposure is good, the drawing-out efficiency is high, the service life of the drill bit is long, and the drawing-out yield is high.

Surface texturing is employed to modify the topography of one or more surfaces (radial or cylindrical) of the sealing system for a roller cone rock bit. The surface texturing results in a dimpled surface which retains additional lubricant helpful in reducing friction in the boundary and mixed lubrication regimes. Shot peening is disclosed as one method for texturing the desired surface.

The invention provides a special tooth PDC drill bit, belongs to rotary drilling drill bits for petroleum and geology, and particularly relates to a drill bit of a special tooth special structure. Thespecial tooth PDC drill bit comprises a drill bit body and a connector. The drill bit body is composed of multiple knife wings and a gage. PDC special teeth are further brazed on the knife wings, diamond layers are arranged on base bodies of the PDC special teeth, and the diamond layers are vertical to respective normal directions. The diamond layers are provided with front bulging ridges, rear bulging ridges and sharp corners. The special tooth PDC drill bit has the advantages that the diamond layers of the PDC special teeth are vertical to the respective normal directions, all the diamond layers can participate in cutting, the drill bit has higher grinding resistance, and the service life of the drill bit is prolonged. The force bearing mode of the diamond layers is changed, the axial impact resistance of the drill bit can be improved in multiples, and the possibility that the drill bit is damaged by bit bouncing and percussion drilling is reduced.

The invention relates to a plastic pipe punching machine. The plastic pipe punching machine comprises a punching device and a machine body located on the two sides of the punching device, wherein a to-be-punched plastic pipe is placed on the machine body, the machine body mainly plays a role of supporting, a plurality of rollers are arranged on the machine body, the plastic pipe is arranged on therollers, so that the plastic pipe can move on the machine body conveniently. The punching device comprises a punching machine frame and a clamping mechanism, a punching mechanism and a pressing mechanism which are arranged on the punching machine frame in sequence, wherein the clamping mechanism is mainly used for clamping the plastic pipe, the punching mechanism is used for punching the plasticpipe, and the pressing mechanism is used for setting the plastic pipe right and clamping the other end of the plastic pipe during punching. The punching machine has the advantages that the automationis realized, the consistency of the axial hole spacing is ensured, the uniformity of each circumference section hole and the hole angle is achieved, the quality of each plastic pipe is guaranteed, andthe hidden danger caused by inconsistent manual punching is eliminated.

The invention discloses a drilling machine capable of drilling after positioning. The drilling machine capable of drilling after positioning comprises a drilling machine body; a punching device is arranged on the right side inside the drilling machine body; a drilling device is arranged on the left side of a chain wheel cavity; an earth fetching device is arranged on the left side of the drillingdevice; a cleaning device is arranged on the left side of the earth fetching device; the cleaning device and the earth fetching device are connected via power; and a driving device is arranged on thelower side of the drilling machine body. According to the drilling machine capable of drilling after positioning, via the mode that a prepared hole is positioned before drilling, the prepared hole isautomatically dug at an accurate position without manual operation, and a rotating drill bit is used for drilling. Therefore, wear of a drill bit caused by soil on the ground in the drilling process is reduced, the service life of the drill bit is prolonged, the processes of prepared hole digging and drilling can be completed by one machine, manual carrying of other equipment is not required, thecost is lowered, and labor force is released.

The invention discloses an insert cone bit, belongs to the technical field of drilling equipment for petroleum and natural gas, mine engineering, building foundation engineering construction, geology, hydrology and the like, and particular discloses a cone bit. The insert cone bit comprises a bit body and at least one cone, transversely inserted teeth are inserted and fixed on each cone, and a value range of a tooth crest deflection angle alpha of each transversely inserted tooth satisfies that 70 degrees </=alpha</=90 degrees. By the provided novel structure, the teeth in the structure are acted on shaft bottom rock in a rolling grinding and splitting manner, the insert cone bit has unique advantages particularly for drilling of hard and brittle formations and hard abrasive formations, high rock-breaking efficiency of the bit is guaranteed while service lives of the bit teeth and bearings are prolonged, and further service life of the bit is prolonged.