89results about How to "Improve drilling performance" patented technology

A method and apparatus for holding and turning a tubular and string of tubulars, such as casing, for make-up and drilling with the tubulars are disclosed. The apparatus generally includes a spear and a clamping head, both of which are mounted to a top drive. The spear and the clamping head can be engaged to transmit torque therebetween from the top drive. In addition, an aspect of the invention provides variable height wickers positioned on slips to enable use of the slips with variable inner diameter (ID) and weight casing without deformation or rupture of the casing. Still further, a casing collar is also provided to provide reinforcement to the casing in the area of slip contact with the casing ID.

A bearing block is provided that may be used with a drag bit body or frame to limit depth of cut of cutters on a bit. The bearing block is designed so that it may be interchangeably replaced or repaired without necessitating alteration to a standardized bit frame. The interchangeable bearing block may be used to provide a target depth of cut (TDOC) and/or a selected contact or rubbing area to support weight on bit and limit depth of cut (DOC) for improving drilling performance of a bit. The interchangeable bearing block brings manufacturing selectability by providing a customizable product in terms of depth of cut selection and cutter penetration control for different formations, which is suitable for use with a common bit frame. A rotary drill bit assembly, a unitary cone insert bearing block for a drill bit, and a bit frame are also provided.

The invention discloses a minitype drill bit and a processing method thereof. The minitype drill bit comprises a drill point and a drill body, wherein the drill point comprises two main cutting edges which are symmetrical by the axle center of a minitype drill, two main cutter surfaces and two auxiliary cutter surfaces; and the drill body is provided with two spiral rising chip flutes, wherein the chip flutes are respectively a long chip flute and a short chip flute which have different helical angles so as to change the two chip flutes into a converging state from a separated state; and the short chip flute is finished at the joint part with the long chip flute. As the two chip flutes on the drill body of the minitype drill bit are set to be the long chip flute and the short chip flute which have the different helical angles, and the short chip flute is finished at the joint part with the long chip flute, most part of the drill body is the single long chip flute. Therefore, the rigid part of a flute body is increased, the core thickness thereof is thickened, and the rigidity of the drill body part of the minitype drill is better.

Downhole drilling tools designed and manufactured to minimize or reduce imbalance forces and wear by disposing cutting elements in cutter groups and cutter sets in a level of force balance and by placing impact and/or wear resistant cutters on blades subject to high impact forces and/or large loadings. Manufacturing costs may be reduced by placing inexpensive cutters on blades not subject to high impact forces and/or loadings. Some embodiments comprise designing downhole tools with combinations of thicker blades to receive high impact forces and/or loadings with thinner blades. Some embodiments comprise designing downhole drilling tools with optimized fluid-flow properties. Designing methods may comprise performing simulations on a designed tool, evaluating respective forces acting on cutters during simulated engagement with a downhole (uniform and transitional) and/or evaluating wear on cutters and bit, and/or CFD simulations to evaluate fluid-flow optimization on a tool. Various cutter layout procedures and algorithms are described.

The invention discloses a continuous oil pipe horizontal well drilling grinding and pumping type composite bridge plug process, which comprises the following steps of: (1) installing ground equipment; (2) connecting the ground equipment with a continuous oil pipe well pigging and washing tool string; (3) putting the continuous oil pipe well pigging and washing tool string into a well; (4) detecting the position of a fish top of a composite bridge plug, and performing well washing; (5) connecting the ground equipment with the continuous oil pipe well pigging and washing tool string; (6) putting the continuous oil pipe well pigging and washing tool string into the well; (7) performing drilling and grinding operation; (8) pumping three-side glue liquid into the well after the bridge plug is penetrated through drilling; and (9) putting down a continuous oil pipe (3) and performing the drilling grinding operation on the next bridge plug. The process has the advantages that the bridge plug drilling and grinding under pressure can be directly performed after the fracture without the pressure relieving; the construction period is short; the work intensity is low; and the stratum energy loss can be effectively prevented.

The invention relates to a novel thin-interbedded horizontal well landing geosteering method. The horizontal well landing geosteering method includes the following steps: (1) constructing a horizontal well landing geosteering comparison model; (2) vertically correcting an LWD (Logging While Drilling) curve of a curve section; (3) carrying out error judgement and determining structure errors in real time by means of the fine comparison of the landing geosteering comparison model; and (4) determining a trajectory adjustment according to the structure errors scheme. The method realizes the transformation from conventional mark comparison to digitalized continuous comparison, and has the dual characteristics of real-timeliness and accuracy; and the digitized comparison profile of a landing section is established before drilling, the LWD curve is digitized in real time in the process of landing, and is finely compared with the profile after the vertical depth is corrected, the structure is corrected in real time, a result is judged according to the structure errors, the trajectory design is updated in real time, and thereby accurate landing can be realized.

A drill bit design that employs reverse flow nozzles through which a portion of the drilling fluid is diverted. This reverse or upward flow of drilling fluid creates a condition by which the extraction of drilling sludge (combination of drilling fluid and drilling cuttings) in the cutting area of the drill bit is more efficient and has a greater amount of flow than designs of prior art. This increased flow has the effect of more efficiently removing damaging cuttings away from the drill cutters, lubricating the drill cutters more efficiently, and cooling the drill cutters more efficiently. The end result is increased drilling uptime, increased drilling speed, and less frequent drill bit catastrophic failures.

A hard material head (1) for a rotary percussion drill bit (2) having an elongated shaft (15) including at least three cutting edges (4) distributed circumferentially within a circumscribing circle, a bottom surface (6) located opposite the cutting edges (4) and fastened by a material bond to an end (8) of the drill bit shaft (15) of the rotary percussion drill bit (2), concave side surfaces (5) formed circumferentially between adjacent cutting edges (4), and a peripheral pocket (9) opening toward the bottom surface (6) and formed, respectively, in at least two concave side surfaces (5) located opposite one another, and in which a corresponding axial pin (10, 10′) formed on a shaft end (8) is form-locking engageable.

The invention discloses a variable dimension vibrating auxiliary drilling device and a track generation method, and belongs to the field of numerical control machining. The device is composed of an amplitude-change pole, a piezoelectric transducer, a connecting sleeve, a cutter mounting structure, a machine tool mounting cutter handle and a sliding ring. The device is connected with a machine tool spindle through the machine tool mounting cutter handle; the amplitude-change pole adopts a one fourth wavelength conical step type composite amplitude change mode; the piezoelectric transducer adopts a longitudinal bending vibration sandwiching mode and is composed of piezoelectric ceramic pieces, electrode plates, a rear end cover (a reflex housing), insulation spacers and a pretightening force bolt which are connected through the pretightening force bolt in a fastened mode; the amplitude-change pole is connected with the piezoelectric transducer through a pretightening force bolt and connected with the cutter handle through the sleeve; and the sliding ring is connected with the sleeve through a catch bolt, and thus the whole structure of the device is formed. A cutter is fixed to the cutter mounting structure, one-dimensional, two-dimensional and three-dimensional elliptic track output is generated in the position of a cutter nose under control of drive signals of the piezoelectric transducer. The device is simple, stable three dimensional elliptic motion tracks can be generated conveniently, and the device can be directly integrated with numerical control machining machine tools for auxiliary precision drilling machining.

The present invention relates to a tool sharpening method for the back tool face of drill head tip with a complete helical surface, wherein the back tool face is a continuous helical surface. In the tool sharpening process, the grinding wheel and the drill head execute a corresponding helix feeding movement, and the shaft line of the helical surface of the helix feeding movement intersects with the shaft line of the drill head to form an angle; the relative position of the grinding wheel and the drill head is adjusted according to the toll sharpening parameter of the back tool face; the grinding wheel is fixed, the drill head executes a helix feeding movement relative to the grinding wheel; alternatively, the drill head is fixed, the grinding wheel executes a helix feeding movement around the drill head. After the back tool face at one side is finished, the drill head spins by 180 degree relative to the initial position of the tool sharpening process and around the shaft line of the drill head, and the symmetrical back tool face is sharpened according to the same parameter. The present invention is adapted to the tool sharpening of drill tip of not only the big drill head but also the minitype drill head.

A micropore forming method includes the steps: firstly, fixing a molybdenum sheet on a worktable of machining equipment; and secondly, forming a micropore with the diameter of phi 0.38mm, the roundness of 0.01mm and the surface roughness of Ra 0.1 at a preset position of the molybdenum sheet. The micropore forming step particularly includes positioning, pre-drilling and expanding. An expanding drill with the diameter of phi 0.38mm is used for expanding on the basis of pre-drilling during expanding, cutting fluid is used for washing the expanding drill and the molybdenum sheet during expanding, the rotation speed of the expanding drill is 5000-10000 revolutions per minute, the feed speed of the expanding drill is 1-5mm/min, drilling is repeated for 8-12 times, and grease lubricant is smeared on the surface of a drill bit of the expanding drill. The micropore forming method adopts a machining mode, and the formed micropore can meet the requirement of an extremely small suction hole on machining precision.

The invention provides a bicontinuous phase micro-emulsion which comprises an emulsifier, a water soluble acid, an oil phase and a water phase. The emulsifier is an amine nonionic emulsifier. The invention further discloses a drilling fluid containing the micro-emulsion. The drilling fluid comprises the micro-emulsion, an oil base stabilizer, organic soil and a weighing material. The invention further discloses a preparation method of the micro-emulsion and the drilling fluid. The method comprises the steps that other raw materials are mixed, the water soluble acid is added for induction to obtain the bicontinuous phase micro-emulsion and the drilling fluid, or the other raw materials and the water soluble acid are mixed at first to obtain the bicontinuous phase micro-emulsion, a drillingfluid additive is added, and the bicontinuous drilling fluid is obtained. The bicontinuous phase micro-emulsion has the advantages that the unique oil phase and water phase bicontinuous characteristics, high shearing force, low plastic viscosity and viscoelasticity rheologic characteristics are achieved, the advantages of the oil phase and water phase drilling fluids can be shown at the same timewhen the micro-emulsion is used for the drilling fluid, and the water power transmission, suspension, rock debris carrying and well cleaning capability of the drilling fluid are enhanced.