Device for centering and protection from the transverse and longitudinal vibration and shock

 

The invention relates to measuring apparatus and can be used in the oil and gas industry and Geophysics to control the spatial position of the wellbore during drilling. The technical result is to provide centering and amortization downhole downhole tools (JV) in the longitudinal and transverse directions. For this purpose, the device is made in the form of two elastic elements placed in the space between the inner surface of the drill pipe and the outer surface of the housing of the joint venture, ensure the persistence of the angular orientation of the JV and not hamper the passage of drilling fluid. Moreover, the elastic elements are made flat and annular and invested in each other. The internal elastic element into two symmetrical points attached by using the details to the JV, and the other pair of symmetrical components is attached to the elastic outer element. The outer elastic element into two symmetrical points attached parts to the inner surface of the drill pipe. And on a side surface of the flat elastic outer element is made of the slot to provide the necessary rigidity in the longitudinal direction. 1 is alzavano in the oil and gas industry and Geophysics to control the spatial position of the wellbore during the drilling process.

The invention consists in providing protection measuring downhole downhole tool (SP) from the effects of shock and vibration encountered during drilling, maintaining parallelism to the longitudinal axis of symmetry of the superconducting longitudinal axis of the drill pipe and hold the angular orientation of the JV drill pipe. A constructive solution of the proposed device allows you to save, irrespective of the magnitude of displacement of the JV under the influence of shock and vibration parallel to the longitudinal axis of symmetry of the superconducting longitudinal axis of the drill pipe and its angular orientation.

Known spring-spring for centering devices in oil and gas wells in the process of their research (RU 2185509, CL E 21 In 47/00, publ. 20.07.2002, page 4) [1], performed in the form of a flexible plate of the elastic element and mounted around the downhole tool (SP).

However, the implemented technical solutions in [1] applies to conservation of angular position SP when moving relative to the drill pipe and in contrast to the claimed device is not designed for effective damping of the longitudinal vibration and shock due to the high structural rigidity of the sliding elements in the longitudinal direction (for polysilazane is the way of the cased wellbore deviation survey (RU 2066749, CL 6 E 21 In 47/022, publ. 20.09.1996, page 9) [2], in which the azimuth stabilization case JV is achieved by placing on its surface spring elements sliding on the inner surface of the tubing and which simultaneously centralizers SP.

However, in the known method [2] centering and giving the azimuthal orientation of the JV is arcuate in a plane parallel to the longitudinal axis of the pipe elements, allowing the JV to move along the pipe axis.

In contrast to [2] the proposed invention, the shock absorber is made in the form of two annular flat, nested into each other elastic elements, and the elastic outer element is rigidly fixed in the pipe.

Known decentralizer downhole composition (EN 2106468, CL E 21 In 7/08, publ. 10.03.1998, page 5) [3], containing elements with elastic support straps.

However, this technical solution in contrast to the claimed elements with elastic support straps having a bending in the plane parallel to the longitudinal axis of the pipe, not intended for damping vibrations that affect the decentralizer in the drilling process. Support bars are used to commit the plane of centralizers and damping of longitudinal oscillations of the drill to the face.

The proposed technical solution, the device comprises elastic elements has a circular shape in a plane perpendicular to the longitudinal axis of the tube, and the elastic outer element is rigidly fixed in the pipe. Such design of the absorber allows you to move JV only within its elastic deformation and is designed to fix the JV and protection against longitudinal and transverse vibrations and shocks occurring during operation of the boring tool.

The present invention is a device that provides centering, positioning in the longitudinal direction and amortization downhole (SP) in the longitudinal and transverse directions while maintaining the angular orientation and allows you to get the maximum useful amount of SP for a given diameter of the drill pipe.

This object is achieved in that in the space between the inner surface of the drill pipe and the casing JV placed a device for centering, positioning in the longitudinal direction and protection from the transverse and longitudinal vibration and shock (damper), consisting of two annular flat nested into each other elastic elements, with elastic vnutrisyemyejnogo located mountings - to the elastic outer element, and an axis passing through the first and second pairs of attachment points are mutually perpendicular.

Elastic outer spring element, in turn, in two symmetrical points is fixed by clamping to the inner surface of drill pipe, with the axis passing through the two attachment points, perpendicular to the axis of the elastic inner element passing through the point of its attachment to the elastic outer element.

To provide the necessary stiffness of the shock absorber in the longitudinal direction on the side surface of the elastic outer element is made of slots, the number of which is determined by the mass and the required attenuation of the vibrations of the JV. Ensuring the required rigidity of the shock absorber in the transverse directions is achieved by matching the geometry and material of the elastic inner element.

The invention is illustrated in the drawing, where

1 - elastic outer element made of elastic metal strip;

2 - downhole downhole (2);

3 - internal elastic element made from folded in several layers of elastic metal strip. The choice of thickness of the tape is provided n the p>

4 - mountings;

5 - slot, made on the side surface of the elastic outer element to provide the necessary stiffness of the shock absorber in the longitudinal direction.

The absorber presents construction operates as follows.

When the loads in the transverse direction of the internal elastic element 3 is deformed in the direction of the current load in the plane perpendicular to the longitudinal axis of the joint venture, providing cross-depreciation. The damping of free oscillations is due to the presence of drilling fluid in the space between the JV and drill pipe, and the friction between layers of elastic metal strip elastic inner element.

Under longitudinal loads on the damper is deformed flat elastic elements of the outer element 1, formed by the slits 5, providing moving JV with internal elastic element 3 along the longitudinal axis.

The required torsional rigidity is ensured by selection of the ratio of the longitudinal and diametrical dimensions of the elastic elements.

The invention allows centering, positioning in the longitudinal direction and amortization JV drilling in predolin is prostranstve between the inner surface of the drill pipe and the casing of the JV. Such arrangement of the shock absorber prevents the passage of drilling fluid, which together with its main purpose provides damping of free oscillations of the chassis SP.

Of significant importance is the location of the absorber outside the joint venture, if we take into account that currently downhole devices mostly have to work in small diameter wells where to their weight and size parameters subject to strict requirements.

Claims

Device for centering and protection from the transverse and longitudinal vibration and shock, made in the form of two elastic elements placed in the space between the inner surface of the drill pipe and the outer surface of the downhole tool housing (SP), ensuring the persistence of the angular orientation of the JV and not hamper the passage of drilling fluid, characterized in that the elastic elements are made flat and annular and nested within each other, wherein the inner elastic element into two symmetrical points attached with details to SP, and another pair of symmetrical components is attached to the elastic outer elements element into two symmetrical points attached parts to the inner surface of drill pipe, and the axis passing through the two attachment points perpendicular to the axis of the inner elastic element passing through the point of its attachment to the outer elastic element, and the side surface of the flat elastic outer element is made of the slot to provide the necessary rigidity in the longitudinal direction.

 

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FIELD: oil and gas extractive industry.

SUBSTANCE: method includes selection of cable of required rigidity and fixing devices on it. Transporting of devices into well is performed under effect from weight of cable and devices. Cable also contains inner hermetic pipe, which is plugged on both sides prior to lowering cable into well. Liquid is pumped into pipe under pressure through locking valve in upper plug and is kept in pipe under constant pressure during operation. After that cable is lowered with devices fixed to it. Value of pressure of liquid in pipe is determined from formula Ppipe≥ Pwell(Scable/Spipe-1)-QcablexLcable/Spipe<Ptear, where Ppipe - pressure of fluid in pipe, kg-wt/sm2; Scable - cross-section of cable with pipe, sm2; Pwell - hydrostatic pressure of well liquid column at depth of planned delivery of devices on cable, kg-wt/sm2; Spipe - cross-section area of pipe aperture and plug area equal to it in contact with liquid in pipe, sm; Qcable - weight of 1 km of cable with pipe, kg-wt; Lcable - length of cable to depth of planned delivery of devices, km; Ptear - pressure of liquid in pipe leading to tear of cable, kg-wt/sm2, determined from formula: Ptear=Ftear/Spipe, where Ftear - tear force for cable according to documentation, kg-wt.

EFFECT: higher efficiency.

3 cl, 1 dwg, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: device is made with possible use in conjunction with scraper for removal of paraffin precipitations. Device includes end piece for connection to well device and metallic rod with variable cross-section. Rod is made in form of at least three serially placed truncated cones. Cones have double relation of greater diameter to lesser diameter.

EFFECT: higher efficiency.

4 cl, 2 dwg

FIELD: oil industry.

SUBSTANCE: all equipment-hoisting operations are performed during underground well maintenance prior to lowering pumping equipment. Equipment is mounted in tail piece lowered into well. After extraction of pumping equipment from the well, end piece with closed end is lowered, having calculated length, dependent on depth of perforation range. Then specially made branch pipe is lowered into well with slit outlet for geophysical cable. Branch pipe with slit outlet is rigidly connected to pipe pumping filter. Then equipment is lowered into tail piece in such a way, that geophysical cable was inserted through slit outlet into behind-pipe area of well. Further, pumping equipment is lowered, including tubing string, well sucker-rod pump and bars column suspension. In such a way, equipment is effectively positioned in tail piece, and connection to secondary equipment is maintained through geophysical cable, connected to tubing string by braces.

EFFECT: higher safety.

FIELD: mining industry.

SUBSTANCE: device has post with mounting holes along circle, forks with aperture for holding fork relatively to post, roller and stopper. Upper portion of post and lower portion of fork are made in form of disc, are combined by axes and have mounting apertures along even circle along axis in a way, that angle between post apertures was different from angle between fork apertures.

EFFECT: higher durability, higher precision, higher efficiency, broader functional capabilities, higher personnel and equipment safety.

1 ex, 3 dwg

Uniting device // 2266407

FIELD: survey device to survey wells during drilling and operation, particularly to unite modules during cooperation thereof.

SUBSTANCE: device comprises body including two parts and ball finger. The ball finger has spherical surfaces mating upper body part. The ball finger is fastened by pressing nut. Lower part of ball finger is screwed in lower body part to which sleeve performing limited axial movement is connected. The sleeve movement is limited by retaining nut. Uniting device air-tightness is provided by sealing ring and pressing nut installation.

EFFECT: increased degree of uniting device movement freedom, improved air-tightness.

1 dwg

Cable adapter sub // 2267002

FIELD: drilling equipment, particularly cable television system used to perform navigational control of directional and horizontal oil and gas well drilling from ground surface and to guide borehole cable rope from inner cavity out of drilling string.

SUBSTANCE: sub comprises threaded connection pipe with thrust end, body with straight and peripheral inclined channels, bush and annular sealing member arranged in straight body channel. Straight body channel is central and provided with cup with inner and outer longitudinal grooves. The bush is installed so that the bush may cooperate with thrust end of threaded connection pipe and has longitudinal extensions arranged in inner longitudinal cup grooves. Annular sealing member comprises extension having orifice and cut for cable introduction into the orifice. The extension is arranged in peripheral inclined channel of the body. Safety means formed as reinforcing member facing straight channel and as elastic member with orifice and cut for cable introduction and arrangement is installed at inclined channel inlet.

EFFECT: increased service life, ease of sub operation and repair.

3 cl, 4 dwg

FIELD: earth and rock drilling, particularly means for transmitting measuring-signals from the well to the surface.

SUBSTANCE: method involves spooling communication element on a reel; connecting the first end of the communication element to the first user at the first end of the pipe assembly; moving the communication element inside the pipe and connecting the second end of communication element to the second user arranged at the second end of the pipe assembly. The communication element is moved in several stages simultaneously with pipe assembly enlarging or disassembling by displacing the reel inside a pipe under force applied to the reel from the second pipe end and with simultaneous winding or unwinding of the communication element for length equal to reel displacement distance without communication breakage. Continuous communication is provided by linking of the second end of communication element to the second user through traction member during reel displacement or through parallel channel to be temporarily linked up during traction member movement without the reel, which is fastened to pipe assembly at the second end thereof. During pipe assembly enlargement communication element having length exceeding pipe assembly length is provided. The communication element is spooled on the reel. Traction member is inserted in the pipe to be connected and the reel is moved from the first pipe end to the second end thereof. During pipe assembly disassembling the reel is pushed in reverse direction. Device for above method realization includes lifting mechanism and reel. The reel comprises body in which frame with communication element wound on the frame is installed so that the first end of the communication element is provided with means to connect thereof to the first pipe assembly and the first connector to link thereof to the first user. The second end of the communication element is fastened to the reel frame and has the second connector to link thereof with the second user. The device is provided with traction member having length exceeding length of each separate pipe and having members to connect thereof with lifting mechanism from one side and with the reel from another traction member side. The device also has additional branch of communication member to connect the second reel connector to the second user through lifting mechanism. The reel has sealed body and fastening members to secure the reel to the pipe. Outer transversal dimension of the reel body does not exceed inner diameters of pipes included in the assembly. The lifting mechanism has control unit connected with reel body by above communication element branch through traction member.

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17 cl, 2 dwg

FIELD: oil and gas industry, particularly devices for well survey and oil or gas sample taking.

SUBSTANCE: method involves lifting lubricator; inclining lubricator through 40-45° to vertical line and retaining thereof in inclined position during bottomhole apparatus insertion; lowering lubricator in well and vertically installing thereof on connection unit of well production tree. The simultaneous lifting, inclination, retaining, as well as simultaneous lowering and installation operations are carried out with the use of mechanism. The mechanism comprises two cantilever arms connected one to another by worm gear type screw adapted to bring together and pull apart above arms under handle rotation.

EFFECT: extended possibilities of well survey in difficult-to-access areas characterized by severe climate and geographical environment without the use of hoisting equipment, increased efficiency or work performance due to reduced costs and decreased time of technological operation performing.

2 dwg

FIELD: oil industry, particularly to perform running wells provided with flow strings and sucker-rod pumps.

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EFFECT: increased operational reliability due to prevention of logging cable loop forming about flow string and increased reliability of survey results due to measurement performing in working well operation regime.

FIELD: oil industry, particularly to connect to or disconnect electric submersible pump cable from ground-based station cable.

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2 dwg

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