Built-in mechanism for attenuating torsional vibrations for oil field drilling tool

FIELD: oil and gas industry.

SUBSTANCE: downhole tool for attenuating torsional vibrations comprises a free-wheeling coupling assembly adapted to connect the drill string to a drill bit and engage for transmitting torque from said drill string to said drill bit in a first rotation direction of the drill string and disconnecting to prevent torque transmission from said drill string to said drill bit in a second rotation direction of the drill string opposite to said first direction. Said free-wheeling coupling assembly comprises a coupling housing having a generally tubular shape and defining an inner wall with a groove of a tapered shape therein, a coupling mandrel, on one axle located inside said coupling housing and defining the outer wall with a recess made therein, a wedge-shaped element inserted into said recess and forced radially outward up to contact with said inner wall of said coupling housing. Said wedge-shaped element is being adapted to come into contact with said recess to prevent unrestricted rotation of said coupling body relative to said coupling mandrel in the first direction and disconnecting from said groove for providing unrestricted rotation of said coupling housing with respect to said coupling mandrel in the second direction opposite to the first direction.

EFFECT: providing torsional vibrations without the need to increase the bit rate or decrease the weight on the bit.

18 cl, 15 dwg



Same patents:

FIELD: technological processes.

SUBSTANCE: invention relates to a drilling tool. The invention proposes a device for disconnection of a drill string, which includes in a longitudinal direction the first structure intended for attachment to a pipe of the drill string, the second structure intended for supporting a drilling cutting tool and movable relative to the first structure, and an assembly of the pusher between the above said first structure and the above said second structure. With that, the pusher assembly is intended to perform a pushing force on the above said second structure to divert the above said second structure from the above said first structure; with that, the above said pushing force is constant for any position of the second structure relative to the first structure. Besides, the pusher assembly includes a balancing mechanism containing an elastic element and an output lever, and a device for connection between the above said output lever and the above said second structure for application of the pushing force in a longitudinal direction. With that, the elastic element performs an elastic force proportional to compression of the elastic element. The output lever is connected to the above said elastic element and is capable of being rotated about an output axis. The invention also describes a drill system containing the above said device, and application of this drill system.

EFFECT: reduction of loads tested with a cutting tool at resistance in a longitudinal direction.

22 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: tool comprises an anchor tail-piece, a guide sleeve, a directional adapter and a bent sub. The anchor tail-piece is fixed by rotation on at least one tubular element. The guide sleeve comprises a part with inner thread and angular orientation. The directional adapter is fixed by rotation and is movable axially in regards to the guide sleeve. The bent sub of universal borehole orientation (UBHO) is placed at the upper end of the tool intended for reduction of impact load. The set of borehole electronic package is coupled to the bent sub of UBHO.

EFFECT: tool reduces impact load to the set of borehole electronic package.

23 cl, 15 dwg

FIELD: machine building.

SUBSTANCE: group of inventions refers to dynamic dampers of torsional vibrations and can be used at drilling of oil and gas wells. A dynamic damper of torsional vibrations comprises a case with a flywheel installed inside, the weights are fixed in the flywheel body and the flywheel is made as a torque link system. According to the first invention version, the shock absorbers enter the mass-joint on one end, and the weights made as cylindrical segment-plates by means of a welded bracket and lugs on the other end. According to the second version, a rod with hold-down screws and a lock ring is installed inside the case on one side, and a rod and a spring for its backup are installed on the other side. The shock absorbers enter the mass-joint on one end, and the weights by means of a crosspiece on the other end, the weights are made as cylindrical segment-plates fitted by recesses of different depths. Both versions imply that elastic elements are inserted between the weights for the clearance Δ, together with the weights being distanced from the washer with flyweight in the form of a hollow cylinder.

EFFECT: improved damping characteristics, reduced negative impact of torsional vibrations on a drilling unit in the wide range of its rotation frequency change, increased service life and reliability, reduced failures of the equipment.

3 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: vibration damper - calibrating device comprises a body and a gage plug. The body is perforated in longitudinal and circumferential directions with formation of grooves at exterior surface. The gage plug has joggles at inner surface, and at outer surface between joggles there are soldered hard-alloyed fins. The body and bushing are perforated through and shaped as prismatic grooves thus forming frames with installed steel balls. Diameter of the balls is increasing while distance to the next ball is reducing in longitudinal direction of the vibration damper - calibrating device bottom-up.

EFFECT: improved efficiency in dampening of longitudinal direction that impact the bottom assembly of the drill stem and in calibrating of the well bore.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: proposed centraliser comprises case with axial channel and radial bores, centraliser sleeve concentrically fitted thereat to turn thereabout and furnished with lengthwise ribs at outer surface and damping cartridge at inner surface and axial and thrust bearings. Note here that damping gasket has radial gates made at the level of the case radial bores and set of circular through channels. Note also that said inner spaces of said through channels are communicated via gates at case radial bores with the case axial channels and composed by circular segments different in different directions to ends of centraliser sleeve. Thrust bearings are fitted in axial channels of damping shell with the store of axial travel and composed of flexible hollow inserts, their side surfaces being made with large angles of seizure to seal lengthwise through channels at end sections.

EFFECT: higher operating efficiency.

3 dwg

FIELD: construction.

SUBSTANCE: invention relates to a connection unit for use in a water-separating column (marine riser) (1). The connection unit comprises inner and outer tubular elements (21, 22), installed as capable of mutual displacement in axial direction. Tubular segments (21, 22) are connected to appropriate segments of the riser with formation of a chamber (23) with a piston (24). The piston (24) separates the chamber (23) in the radial direction into the first and second parts (25, 26) of the chamber. At the same time the first part (25) of the chamber, which in the initial position of the connection unit comprises a non-compressible fluid, is reduced in volume as the inner tubular segment (21) extends from the external tubular segment (22). According to the invention, the connection unit is equipped with a connection line (30) for fluid, stretching from one part (25) of the chamber to its other part (26). The connection unit provides for control of relative movements of tubular segments (21, 22) by means of provision of the possibility of the fluid flow to flow along the connection line (30) from one part (25) of the chamber into its other part (26).

EFFECT: expansion of a time slot for actions with a riser.

18 cl, 7 dwg

Drill string damper // 2467150

FIELD: mining.

SUBSTANCE: invention relates to borehole drives of rotation, particularly, to hydromechanical drill string dampers. Damper has tubular case to accommodate thrust piston sleeve with top and bottom thrust faces and thrust bearing with thrust face arranged between case bottom face and spring mechanism bottom face. Thrust bearing thrust face and hollow adapter bottom thrust face a stay in contact with spring mechanism bottom face. Outer tubular elements accommodating thrust bush, spring mechanism and thrust piston sleeve are integrated into single module. Annular piston is arranged inside thrust piston sleeve to reciprocate therein. Rotary drive to transmit rotation between tubular case and hollow adapter is provided with impact ring arranged in hollow adapter to allow it to displace in lengthwise direction inside thrust bush.

EFFECT: linger life, higher reliability, lower costs of production servicing and repair.

4 cl, 6 dwg, 1 tbl

FIELD: oil and gas production.

SUBSTANCE: device for damping vibrations in field drill string is made as module consisting of case with two tubular elements forming circular cavity between them. Internal walls of the cavity, in particular have projecting ribs improving transfer of vibration energy from the said internal wall to particles filling the circular cavity. The procedure for damping vibration caused with drilling in the field drill string is based on damping by means of particles and in absorbing vibration energy by means of at least one said module.

EFFECT: raised efficiency of drilling and increased service life of drill string due to vibration damping.

28 cl, 6 dwg

FIELD: oil and gas production.

SUBSTANCE: invention elates to petroleum industry, particularly to device for reduction of dynamic loads to rods and at operation of machine-jack pump. Compensator of dynamic loads of pumping rods contains cylinder with stepped plunger, installed with ability of formation of annular space, hydraulically connected by hydraulic channel to cavity under plunger and adapter with thread under submerged rods. Additionally hydraulic channel is implemented on external surface of stepped plunger in the form of spiral helical port, and cavity, formed by stepped plunger and cylinder, is pressurised from cavity of well by dummy plug, installed in thread of adapter.

EFFECT: effectiveness increase of device operation at operation of wells.

3 dwg

FIELD: well equipment, possible use during extraction of fluid or forcing of working agent into well with one or several beds.

SUBSTANCE: connection includes body and shaft built into it, interconnected by telescopic drive, sealing packer, stopper in form of cams and a shell. Body is made of several standard pipes, interconnected by sleeves. Positioned in one of them is stopper for rigid connection of body to shaft. Shaft has radial grooves for positioning of stopper and threaded radial apertures, wherein shear screws are mounted for holding in shell shaft. Shell is made with external grooves, in one of which packing ring is positioned, and in other one - shear screws. Shell is mounted in shaft with possible downward movement and has internal planting channel for its downward movement by hydraulic action by means of cable reverse valve or mechanical effect by means of impact tool, external supporting surface for stopper for rigid holding in original position of shaft and body, and external recess for positioning of stopper after its downward movement. Body has internal supporting clamp. Shaft is made with external stopping and internal stopping clamps.

EFFECT: simplified construction, manufacturing technology and, appropriately, lower costs and also increased reliability and efficiency of operation.

12 cl, 8 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to production of hydrocarbons from several beds and to their mixing. Well tool consists of several tubular sections connected by a new thread-less linear connection system. Cylindrical walls of adjacent walls are provided with channel for electrical conductors for connection of electronic components in the tool different sections.

EFFECT: maintenance of barometric pressure inside well tool.

32 cl, 14 dwg

FIELD: mining.

SUBSTANCE: surface area of a thrust face of a coupling of a threaded connection in a maximum worn-out state is equal to surface area of a critical section of a nipple, which is multiplied by a coefficient of optimum stress of pre-tightening and at the same time, the surface area of the thrust face of the nipple, due to which optimum values of the main parameters of the connection are provided.

EFFECT: improving reliability and efficiency of functioning of a drill column both at drilling and during performance of lowering and lifting operations.

3 dwg, 1 tbl, 1 ex

FIELD: mining.

SUBSTANCE: group of inventions relates to a drilling bit for percussive drilling of mine rock and to its use. A drilling bit includes a drilling head, a connecting coupling having the first end and connected to the drilling head with the first end, a bore passing axially through the connecting coupling from its second end to the first end and provided with an internal cylindrical female thread for connection to the corresponding external cylindrical male thread of a drilling stem, and an impact surface to be borne against an end surface of the drilling stem, which is made at the bore bottom and passes perpendicular to the longitudinal axis of the drilling bit. Each cross section of the bore between the impact surface and some part of the bore, where the female thread has a full profile, has a surface area that is less than the cross sectional area of the bore on the bore part where the female thread has a full profile.

EFFECT: increase of strength and elimination of weakness of a bit connecting coupling.

13 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: sealed threaded connection for casing pipes from unplasticised polyvinylchloride comprises a male element and a female element with trapezoid thread profile, the female pipe end comprises an elongated socket with the inner diameter being less than the outer male element diameter by double height of the thread profile. The thread on the male and female elements is fitted by cone sections, the pipe section before the first thread turn is additionally fitted by a lead-in rib made as a cone. Additional leakproofness of the threaded connection is achieved due to a rubber packing ring set after the outer thread of the male element and adjoining the smooth cylindrical part of the lead-in rib on the inner thread on the female element.

EFFECT: improved strength and resistance of the threaded connection to axial and radial loads and the improved leakproofness of the threaded connection.

4 dwg

Threaded joint // 2530689

FIELD: machine building.

SUBSTANCE: invention relates to threaded joints for exploration works or for operation at hydrocarbon wells. A threaded joint comprises the first component including a male end with threaded zone placed at the component's outer periphery surface, and the second component including a female end with threaded zone placed at the component's inner periphery surface. The threaded zone of the male end is screwed into the threaded zone of the female end. The threaded zones comprise the respective male and female thread turns including base, tip, connection lateral side and loading lateral side. The loading lateral side of the threaded zone at the female and/or male end is provided with a groove respectively near the base as well as with a protrusion protruding from the loading lateral side of the threaded zone at the male and/or female end respectively. Near the tip the said protrusion comprises a convex surface and a concave surface. When the joint is connected, there is a radial gap between the concave surface and the groove and an axial gap between the protrusion end and the groove bottom.

EFFECT: invention provides for higher reliability of a threaded joint.

20 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: invention relates to riser joints. Thread joint assembly comprises first and second tubular components with rotational axis (4). Female threaded zone (10, 30) made at outer circular surface is arranged at one end (1, 3) of every component. Every said end (1, 3) terminates in end surface (15, 35) including means (14, 34) making toothed coupling of straight transfer to allow locking of said first and second tubular components at spinning. Said assembly comprises extra third tubular component with its rotational axis (4). Two female threaded zones (20, 20') are arranged on inner circular surface at every end of said third tubular component (2, 2'). One of two male threaded zone (10, 30) can interact by uncoupling from one of two female zones (20, 20'). While another male threaded zone can interact with another female threaded zone. Male end (1) of the first tubular component and appropriate female end (2) of third tubular component comprises means (11, 21) for free spinning. Said male zone (10) screwed in female zone (20), said tubular components can spin free relative to each other.

EFFECT: lower risks of uncoupling in operation.

13 cl, 7 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to couplers of pump rods for screw pump drive. Said coupler comprises captive nut with inner ledge on one side and internal thread on opposite side, rod body, captive nut and locating nut. Rod body has external thread, wedge-like slit and wedge-like ledge at opposite end. Note here that captive nut and guide captive sleeve are fitted on the rod of wedge-like ledge, locating nut being fitted on the body to contact with its inner ledge. Wedge-like ledge can be arranged in wedge-like slot of adjacent rod at its coupling with the guide captive sleeve.

EFFECT: higher torsion strength and breaking point.

5 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to drilling engineering and refers mainly to threaded connection of drill pipe joints used for geological surveying and oil well drilling. The threaded connection consists of a sleeve, a nipple and a slotted spring installed between the sleeve lip and thrust face of the nipple. At that a gap is formed between the sleeve lip and the nipple thrust face, this gap is liquidated in process of the connection tightening and spring compression and it is equal to the spring pitch and according to its parameters it corresponds exactly to the preset axial load to the inner thrust joint. Upon tightening of the connection the exact axial loads is provided to the outer thrust joint. Reliable functioning of both thrust joints allows increasing axial force of the threaded connection 1.5 times and improving its statistical strength and cyclic life.

EFFECT: provision of the exact preset loads to the inner and outer thrust joints, maintenance of their ratio within the whole operational period.

1 dwg

FIELD: machine building.

SUBSTANCE: group of inventions refers to a pipe component for a threaded joint. The joint on one end is fitted with a thread zone formed on its outer or inner periphery surface depending on the type of the threaded end: male or female. The said end comes to the end surface, and the thread zone along of at least one section comprises thread turns which, if considered in the longitudinal section passing through the pipe component axis, comprise the thread turn vertex, the thread turn base, a loaded side and a striking side. The width of the thread turn vertices decreases in the direction to the end surface while the width of the thread turn bases increases. If considered in the longitudinal section passing through the pipe component axis, the profile of loaded and/or striking sides comprises a central section of a continuous curve fitted with an inflection point. The said profile is convex at the thread turn vertex and concave at the thread turn base. Threaded joint is described as well.

EFFECT: higher reliability of threaded joint.

16 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: connection of shaped tubes of well shutters includes shaped tubes with cylindrical ends, which are equipped with sleeved and nipple thread on mutually facing surfaces. Besides, there are sealing devices of the connection, which are made in the form of two elastic rings. One of the rings is installed in an expanded annular coupling end on the side of internal joint of thread between the mutually facing cylindrical surfaces of the threaded and annular sections. In the nipple end there is a constriction for the second elastic ring on the side of an external joint of thread between the mutually facing cylindrical surfaces of the threaded and annular sections. The external joint is made in the form of tightly adjoining and mutually facing conical tube surfaces. Above and/or below the threaded connection on the cylindrical section there is a constriction in the form of alternating annular bulges and cavities. An elastic cuff is welded on the outer surface of the constriction flush with the cylindrical section.

EFFECT: reducing stiffness of the connection cross section and excluding liquid flow between walls of the shutter and the well.

2 dwg

FIELD: mining industry.

SUBSTANCE: connection and element include at least one mostly cylindrical outer thread and respectively mostly cylindrical inner thread. Outer thread is made at pipe portion, making up a solid whole with component of drilling bars. Threads include side edges and recesses placed between them. Recesses of cylindrical outer thread are placed mostly at a distance from appropriate vertexes of cylindrical inner thread, one of portions with decreased cross-section is partially composed of layer of material with higher electrode potential, than that of steel, made of nickel, chrome, tin, cobalt, titan or alloys thereof.

EFFECT: higher efficiency.

2 cl, 6 dwg, 1 ex