CN110091155B

CN110091155B - Axial guiding centering cutting sleeve type liquid drive connecting device for deep water oil and gas pipeline

Info

Publication number: CN110091155B
Application number: CN201910505129.0A
Authority: CN
Inventors: 刘春花; 刘新福; 周超; 李博; 于邦廷; 何鸿铭
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2021-04-23
Anticipated expiration: 2039-06-12
Also published as: CN110091155A

Abstract

The invention provides an axial guiding centering cutting sleeve type liquid drive connecting device for a deepwater oil and gas pipeline, which is applied to underwater quick connection of the deepwater oil and gas pipeline. The cutting sleeve type liquid drive connecting device adopts an axial symmetric structure and metal static seal, carries out deep water quick centering operation according to a slip centering device and a centering liquid drive device, and carries out deep water axial guiding cutting sleeve type quick butting operation through a rod type guiding device, a cutting sleeve butting device and a cutting sleeve type liquid drive device; the pipe end connector is connected to the side end of a deep water oil and gas pipeline, the slip centering device is clamped on the connecting pipe and the deep water oil and gas pipeline respectively according to the power of the centering liquid driver to achieve axial centering effect, the rod type guider achieves axial guiding effect according to a spline guide rail between the main guide rod and the jaw sleeve and a half-cylindrical surface moving pair between the auxiliary guide rod and the jaw sleeve, the clamping sleeve butt-joint device achieves underwater butt joint of the rod type guider and the pipe end connector according to the power of the clamping sleeve liquid driver and the butt-joint jaws arranged in a squirrel-cage mode, and underwater self-locking effect is achieved through the automatic locking body.

Description

Axial guiding centering cutting sleeve type liquid drive connecting device for deep water oil and gas pipeline

Technical Field

The invention relates to a device used in connection of deep water oil and gas pipelines in the field of ocean engineering, in particular to a liquid drive connection device of deep water oil and gas pipelines, which adopts axial guide centering and ferrule type quick butt joint.

Background

The deepwater oil and gas pipeline is responsible for the transportation tasks of crude oil produced from the seabed and oil and gas media such as qualified crude oil, associated gas and the like, once the deepwater oil and gas pipeline is damaged due to corrosion or other external force damage, the pollution to the marine environment, the waste of oil and gas resources and the interruption of production can be caused; on the other hand, when the existing deepwater oil and gas pipeline has insufficient conveying capacity or a new peripheral oil field is accessed, the laying scale of the deepwater oil and gas pipeline needs to be continuously expanded, and the deepwater oil and gas pipeline connecting technology and the connector thereof are widely applied to engineering practices such as deepwater oil fields, marginal oil fields, deepwater oil and gas pipeline restoration and the like.

Deepwater oil and gas pipeline connectors are commonly provided with bolted flange connectors, quick connectors Morgrip and jaw type pipeline connectors. The bolt flange connector consists of a rotating ring flange and a welding neck flange, the method flange connector needs a special mounting tool, the mounting tool and a marine pipe flange joint need high-precision centering performance, and a special operation machine needs to be matched in the construction process of deep water oil-gas pipeline connection operation, so that the mounting construction time is long. The quick connector Morgrip is characterized in that two sides of a deep water oil and gas pipeline are respectively provided with a bearing type flange, a series of ball bearings with springs are arranged in the bearing type flanges, a connecting ring is arranged in the middle of the bearing type flanges, the quick connector Morgrip is convenient to disassemble and assemble underwater, however, the quick connector is more expensive than a traditional bolt flange connector, underwater automatic connection of the deep water oil and gas pipeline is difficult to achieve, and meanwhile, the installation precision is lower. The jaw type pipe connector is called as a 'non-standard flange' because the jaw type pipe connector does not adopt bolt flange connection in structure, has a certain alignment function, is represented by products of foreign companies such as Cameron, FMC Corporation, Oil States and the like, has the advantages of simple construction and reliable connection operation of deepwater Oil and gas pipe connection operation, greatly shortens connection working hours, but has the defects that the production technology is always mastered in foreign professional companies, and the development of the jaw type connection technology is still not perfect at present. In addition, the connection technology of the domestic deepwater oil and gas pipelines is still in the research and development stage, and the connection technology does not have the capability of independently completing deepwater operation.

Disclosure of Invention

In order to effectively solve the problem of underwater quick connection of deep water oil and gas pipelines and overcome the defects and the defects of the existing deep water oil and gas pipeline connection technology and the connector thereof, the invention aims to provide a deep water oil and gas pipeline liquid drive connection device which adopts axial guide centering and clamping sleeve type quick butt joint. The clamping sleeve type liquid drive connecting device adopts an axial symmetric structure and metal static seal, implements deepwater rapid centering operation according to the axial centering action of a slip centering device and the propelling power provided by a centering liquid drive device, and implements deepwater axial guiding clamping sleeve type rapid butt joint operation through the axial guiding action of a rod type guiding device, the rapid butt joint and self-locking action of a clamping sleeve butt joint device and the propelling power provided by a clamping sleeve liquid drive device, thereby finally completing the underwater rapid connection of deepwater oil and gas pipelines.

The invention provides a cutting sleeve type liquid drive connecting device for axial guiding and centering of a deepwater oil and gas pipeline, which is used for solving the technical problem and mainly comprises a slip centering device, a rod type guiding device, a pipe end connector, a cutting sleeve butt-joint device, a centering liquid drive device and a cutting sleeve liquid drive device. The integral design of the clamping sleeve type liquid drive connecting device is an axial symmetric structure, the main body components of the slips centering device, the rod type guide device, the pipe end connector and the clamping sleeve butt connector are made of super bidirectional stainless steel, the outer surfaces of the centering hydraulic cylinder of the centering liquid drive device and the clamping sleeve hydraulic cylinder of the clamping sleeve type liquid drive device are coated with glass fiber reinforced plastics, the slips centering device is of a split structure and is connected with the centering liquid drive device, the inner slips centering device and the outer slips centering device are respectively clamped with the connecting pipe and the deepwater oil and gas pipeline, the guide rod type guide device, the clamping sleeve butt connector and the pipe end connector are sequentially arranged with the same axis from inside to outside along the axial direction, and meanwhile, the inner slips centering device, the rod type guide device and the clamping sleeve butt connector are connected into a whole through.

The ferrule type liquid drive connecting device adopts metal static seal formed by the trapezoid sealing ring, the body of the cylindrical clamping fin sleeve of the trapezoid sealing ring and the material of the outer surface layer of the sealing ring of the trapezoid sealing ring both adopt super bidirectional stainless steel, and rubber wires which are uniformly distributed are arranged inside the sealing ring body of the trapezoid sealing ring.

The slip centering device implements deep water quick centering operation according to propelling power provided by the centering liquid driver and is clamped on the outer ring surfaces of the connecting pipe and the deep water oil-gas pipeline respectively, so that axial centering action when the rod-type guide device is in butt joint with a pipe end connector is achieved.

The front clamping body and the rear clamping body of the inner slip centering device and the outer slip centering device are sequentially provided with a slip body and a slip disc along the axial direction, the slip bodies of the front clamping body and the rear clamping body are symmetrically arranged along the axial direction, the upper end parts of the slip bodies of the front clamping body and the rear clamping body are respectively provided with two sets of slip shaft sleeves, each set of slip shaft sleeves in the slip bodies of the front clamping body and the rear clamping body adopt shaft sleeves which are arranged at equal intervals along the axial direction, the shaft sleeves of the front clamping body and the rear clamping body are arranged in a staggered mode, the shaft sleeves of the front clamping body are internally provided with bearing bushes, the bearing bushes of the front clamping body and the shaft sleeves of the rear clamping body are simultaneously matched with clamping pin shafts, and therefore the front clamping body and the rear. The lower end parts of the slip bodies of the front and rear clamping bodies are provided with tapered bosses which are arranged in groups at equal intervals along the axial direction, and the central part of each group of tapered bosses is drilled with a screw hole and is provided with a stud bolt, so that the inner slip centering device and the outer slip centering device are respectively clamped on the outer ring surfaces of the connecting pipe and the deepwater oil and gas pipeline after deepwater rapid centering operation. The lower end joint surfaces of the slip bodies of the front and rear clamping bodies are respectively provided with a square clamping block and a rectangular clamping groove, and the square clamping block of the front clamping body is matched with the rectangular clamping groove of the rear clamping body, so that rapid capture between the front clamping body and the rear clamping body in the deep water rapid centering operation process is completed.

The slips support divide two sets ofly, interior slips centralizer and outer slips centralizer respectively dispose a set of slips support, every group slips support contains the branch slips support of two same specifications and structure, divide the slips support to weld respectively in the slips body upper portion of the preceding card body and the back card body and along axial symmetry arrangement, and divide the slips support to form by isosceles trapezoid steel bloom and square steel bloom combination, divide the isosceles trapezoid steel bloom slope of slips support to arrange its square steel bloom along vertical arranging simultaneously, from this every group slips support is type of ox horn shape, the top of every branch slips support sets up the rectangle slot and disposes the slips round pin axle, thereby realize slips support and centering hydraulic cylinder articulated.

The pipe end joint is connected to the pipe side end of a deepwater oil and gas pipeline and is in underwater rapid butt joint with the clamping sleeve butt joint device in operation, and the pipe end joint comprises a joint, a shaft pressing sleeve and a sealing ring. The connector adopts the thick wall barrel, and the outer anchor ring of connector is followed the axial from interior to exterior and is equipped with pipe end coupling and joint body in proper order, and the joint body of connector adopts the step shaft structure, and the pipe end coupling cross-section of connector is right trapezoid. The inner wall of the ring cavity of the connector is sequentially provided with a sealing clamping groove and a pipe end clamping ring from inside to outside along the axial direction, the sealing clamping groove of the connector is formed by combining a rectangular ring groove and a trapezoidal ring groove, and the top surface and the outer side groove surface of the trapezoidal ring groove of the connecting sealing clamping groove are sealing contact parts of a trapezoidal sealing ring; the top surface of the connector pipe end clamping ring is precisely matched with the outer ring surface of the deepwater oil and gas pipeline to form a cylindrical surface moving pair, a shaft shoulder is formed at the section change position of the connector pipe end clamping ring to realize the axial positioning of the deepwater oil and gas pipeline, and meanwhile, a sealing ring is arranged on the outer side of the connector pipe end clamping ring along the axial direction. The shaft pressing sleeve is formed by combining a thin-wall cylinder body and a flange plate, is connected with the connector through the flange plate and a screw, and is connected with a sealing ring in the inner wall of a joint ring cavity in an extrusion manner through the thin-wall cylinder body of the shaft pressing sleeve, so that the pipe end connector and the deepwater oil-gas pipeline are fixedly connected and sealed.

The rod-type guider realizes the axial guiding function of the cutting sleeve butt connector during underwater butt joint according to a spline guide rail between the main guide rod and the jaw sleeve and a semi-cylindrical surface moving pair between the auxiliary guide rod and the jaw sleeve, the main guide rod is connected with the rear clamp body and the rear guide disc, the auxiliary guide rod is connected with the front clamp body and the front guide disc at the same time, and a supporting point is provided for the cutting sleeve butt connector during axial butt joint.

The trapezoidal sealing ring is sequentially provided with a cylindrical clamping fin sleeve and a sealing ring body from inside to outside along the axial direction, the section of the sealing ring body of the trapezoidal sealing ring is in an isosceles trapezoid shape, the cylindrical clamping fin sleeve of the trapezoidal sealing ring is formed by clamping fins which are uniformly arranged along the circumferential direction, the clamping fins of the trapezoidal sealing ring are identical in specification and structure and adopt semi-arched thin-wall cylinders, and the cylindrical surface where the inner wall of the ring cavity of each clamping fin is located and the cylindrical surface where the outer ring surface of each clamping fin is located are arranged coaxially.

The connecting pipe adopts a long straight pipe body and has the same pipe diameter and wall thickness as those of a deepwater oil-gas pipeline, transition fit is adopted between the connecting pipe and the inner walls of the annular cavities of the front clamping body and the rear clamping body of the inner slip centering device and between the connecting pipe and the inner walls of the annular cavities of the front guide disc and the rear guide disc, and interference fit is adopted between the connecting pipe and the connecting snap ring of the guide head.

The shapes and the specifications of the front clamping body slip disc of the front guide disc, the front clamping body slip disc of the inner slip centering device and the front clamping body slip disc of the outer slip centering device are the same and all adopt fan-shaped disc bodies, and the shapes and the specifications of the rear clamping body slip disc of the rear guide disc, the rear clamping body slip disc of the inner slip centering device and the rear clamping body slip disc of the outer slip centering device are the same and all adopt semicircular disc bodies. The downside terminal surface of preceding guide dish closely laminates with the downside terminal surface of back guide dish, and the downside terminal surface of preceding card body slips dish closely laminates with the downside terminal surface of back card body slips dish, and the plane of the upside terminal surface place of preceding guide dish and the plane of the upside terminal surface place of back guide dish intersect in the central axis of connecting pipe and the contained angle between two planes is greater than 45, and the plane of the upside terminal surface place of preceding card body slips dish and the plane of the upside terminal surface place of back card body slips dish intersect in the central axis of slips centralizer and the contained angle between two planes is greater than 45. The outer edge of the front guide disc is provided with guide round holes and drag reduction grooves which are uniformly distributed along the circumferential direction, the outer edge of the rear guide disc is milled with rectangular spline holes and drag reduction grooves which are uniformly distributed along the circumferential direction, the outer edges of the slip discs of the front clamping body and the rear clamping body are respectively provided with slip round holes and drag reduction grooves which are uniformly distributed along the circumferential direction, the drag reduction grooves of the front guide disc, the rear guide disc, the front clamping body and the rear clamping body are all fan-shaped, the groove bottom surfaces of the drag reduction grooves adopt circular arch surfaces, the guide round holes of the front guide disc and the rectangular spline holes of the rear guide disc are all staggered with the drag reduction grooves of the front guide disc and the rear, and the slip round holes of the front clamping body and the rear clamping body are arranged in a staggered way with the anti-drag grooves of the front clamping body and the rear clamping body, meanwhile, the cylindrical surface where the axis of the front guide disc guide round hole is located, the cylindrical surface where the central line of the rectangular splined hole of the rear guide disc is located, the cylindrical surface where the axis of the front clamp body slip round hole is located and the cylindrical surface where the axis of the rear clamp body slip round hole is located are located on the same cylindrical surface. The outer end faces of the front guide disc and the rear guide disc in the axial direction are provided with positioning clamping fins, round holes which are uniformly distributed in the circumferential direction are drilled in the positioning clamping fins of the rear guide disc along the radial inner side, stud bolts are arranged, and therefore the rear guide disc is fixed at the inner side end of the guide head.

The guide head is connected to the pipe side end of the connecting pipe, a guide clamping groove and a guide coupling are sequentially arranged on the outer ring surface of the guide head from inside to outside along the axial direction, the section of the guide clamping groove of the guide head is rectangular, the guide clamping groove of the guide head is matched with the positioning clamping wings of the front guide disc and the rear guide disc to achieve axial positioning of the front guide disc and the rear guide disc, the guide coupling of the guide head and the pipe end coupling of the connecting head are of the same type and are matched with the inner wall of the annular cavity of the butt-joint clamping claw simultaneously, the outer end surface of the guide coupling of the guide head along the axial direction is provided with rectangular clamping wings, and the rectangular clamping wings of the guide head are matched with the rectangular annular groove of the pipe end connector to achieve underwater rapid centering. The inner wall of a ring cavity of the seeker is sequentially provided with a connecting snap ring and a sealing clamping groove from inside to outside along the axial direction, a shaft shoulder is formed at the section change position where the seeker is connected with the snap ring to realize the axial positioning of the seeker, the sealing clamping groove of the seeker is formed by combining a strip-shaped ring groove and a trapezoid ring groove, a cylindrical clamping wing sleeve of a trapezoid sealing ring is arranged in the strip-shaped ring groove of the sealing clamping groove of the seeker, the axial fixing of the trapezoid sealing ring is realized, the top surface and the inner side groove surface of the trapezoid sealing ring groove of the sealing clamping groove of the seeker are sealing contact parts of the trapezoid sealing ring, the trapezoid ring groove of the seeker and the trapezoid ring groove of the connector are symmetrically arranged along the axial direction to form a double-ring conical sealing cavity, a sealing ring body of the trapezoid sealing ring is arranged in the double-.

The rod-type guide contains three main guide rod and three auxiliary guide rod, and main guide rod and auxiliary guide rod adopt the stock body of same length and constitute by the threaded joint and the guide body of rod, and the threaded joint symmetric arrangement of main guide rod and auxiliary guide rod is in the both sides end of its guide body of rod, and the guide body of rod of auxiliary guide rod adopts the cylindricality body of rod, and the guide body of rod of main guide rod is equipped with the spline tooth along circumference equipartition, and each spline tooth of main guide rod adopts the rectangle parallel key, spline guide rail when as the jack catch cover axial slides.

The two side ends of the main guide rod are respectively connected with the slip round holes of the rear clamping bodies of the inner slip centering device and the outer slip centering device through the threaded joints of the main guide rod, and the two side ends of the auxiliary guide rod are respectively connected with the slip round holes of the front clamping bodies of the inner slip centering device and the outer slip centering device through the threaded joints of the auxiliary guide rod, so that the inner slip centering device and the outer slip centering device are connected into a whole. The spline teeth of the main guide rod and the rectangular spline holes of the rear guide disc are in interference fit, planes of tooth surfaces on two sides of each spline tooth of the main guide rod are simultaneously in precise fit with planes of hole walls on two sides of each rectangular spline hole of the jaw sleeve, meanwhile, the guide rod body of the auxiliary guide rod and the guide round hole of the front guide disc are in interference fit, and the outer ring surface of the guide rod body of the auxiliary guide rod and the bottom surfaces of the tooth grooves of the double butt-joint teeth of the jaw sleeve are precisely matched to form a semi-cylindrical surface moving pair, so that the axial guide effect of the clamping sleeve butt-joint device during underwater butt joint is realized.

The guide support comprises three guide support parts, the guide support parts are arranged outwards along the radial direction and uniformly welded on the outer ring surface of the rear guide disc along the circumferential direction, each guide support part comprises a square steel block and two semi-ring-shaped clamping blocks, the two ends of the square steel block of the guide support part along the radial direction are respectively welded with the semi-ring-shaped clamping blocks along the radial inner side of the rear guide disc and the outer ring surface of the rear guide disc, and the two semi-ring-shaped clamping blocks of the guide support part are connected through screws to fix the clamping sleeve hydraulic cylinder on the rod type guide part.

The clamping sleeve butt joint device completes underwater quick butt joint between the rod type guide device and the pipe end connector according to propelling power provided by the clamping sleeve liquid drive device and the butt joint clamping jaws arranged in a squirrel-cage mode, achieves underwater self-locking effect between the clamping jaw sleeve and the butt joint clamping jaws through the automatic locking body, and comprises the clamping jaw sleeve, the butt joint clamping jaws, the automatic locking body and a butt joint support.

The clamping jaw sleeve is a thick-wall cylinder, the inner wall of an annular cavity of the clamping jaw sleeve is a conical surface, a wedge-shaped groove is formed in the inner side end along the axial direction, a locking hole is formed in the cylinder of the clamping jaw sleeve, and an automatic locking body is arranged in the locking hole of the clamping jaw sleeve. The outer ring surface of the jaw sleeve is provided with a butt joint disc along the axial inner side, the cross section of the butt joint disc of the jaw sleeve is in a right trapezoid shape, a rectangular spline hole uniformly distributed along the circumferential direction is milled on a rear disc body of the butt joint disc of the jaw sleeve, the rectangular spline hole of the jaw sleeve and the rectangular spline hole of the rear guide disc are in the same position and specification, the front disc body of the butt joint disc of the jaw sleeve is provided with double butt joint teeth, the cross section of the double butt joint teeth of the jaw sleeve is in the shape of a three-arc one-line segment, the three-arc one-line segment of the double butt joint teeth sequentially comprises a tooth top arc, a transition convex arc, a guide shift line segment and a guide rod concave arc, the tooth top arc where the tooth top of the double butt joint teeth is located on an outer circle of the butt joint disc surface and is connected with the guide shift line segment through the transition convex arc, the guide rod concave arc is located at the bottom of the tooth slot of the double butt joint teeth, the circle center of the circle where the guide rod concave arc is located, the auxiliary guide rod slides into the concave arc of the guide rod through the guide moving line section.

The butt joint clamping jaws are arranged in a squirrel-cage mode along the circumferential direction, the ring surface where the outer surface of each butt joint clamping jaw is located is sequentially provided with an inner clamping jaw semi-conical surface, a middle clamping jaw semi-conical surface and an outer clamping jaw semi-conical surface from inside to outside along the axial direction, the conical degree of the conical surface where the inner clamping jaw semi-conical surface of each butt joint clamping jaw is equal to that of the conical surface where the clamping jaw semi-conical surface is located, the middle clamping jaw semi-conical surface of each butt joint clamping jaw is matched with the conical surface where the wedge-shaped groove of the clamping jaw sleeve is located, the conical surface where the outer clamping jaw semi-conical surface of each butt joint clamping jaw is located is matched with the inner wall of the ring cavity of the clamping jaw sleeve and meets the self-locking requirement, the outer clamping jaw semi-conical surfaces of the butt joint clamping jaws are milled with locking sliding grooves, the groove bottom surfaces and the two side groove. The annular surface where the inner wall of the butt joint clamping jaw is located is sequentially provided with a clamping jaw screwing conical surface, a clamping jaw clamping groove and a clamping jaw thrust conical surface from inside to outside along the axial direction, the arc where the cone top of the butt joint clamping jaw screwing conical surface is located is always located on the bottom surface of the guide coupling of the guide head, and therefore the butt joint clamping jaw can rotate around the cone top of the clamping jaw screwing conical surface. The clamping jaw clamping groove of the butt joint clamping jaw is matched with the guide coupling of the guide head and the pipe end coupling of the connector, and the groove surfaces on the two sides of the clamping jaw clamping groove of the butt joint clamping jaw adopt symmetrical conical surfaces and are used as contact surfaces when the guide head and the connector are clamped. The jack catch thrust conical surface of the butt joint jack catch is formed by combining a cylindrical surface and a conical surface, the cylindrical surface of the jack catch thrust conical surface is tightly attached to the outer ring surface of the connector, and meanwhile, the conical surface of the jack catch thrust conical surface does not interfere with the section change position of the connector body of the connector in underwater butt joint operation.

The automatic locking body is composed of a locking pin body, a locking spring and a locking screw, the locking pin body adopts a stepped shaft, two side ends of the locking pin body are respectively provided with a positioning pin and a sliding pin, the sliding pin of the locking pin body is formed by combining a cylindrical surface and a hemispherical surface and is matched with the locking sliding groove of the butt joint clamping jaw, a single sliding high pair is formed between the hemispherical surface of the sliding pin of the locking pin body and the groove bottom surface of the locking sliding groove of the butt joint clamping jaw, and a double sliding high pair with coincident normal lines is formed between the cylindrical surface of the sliding pin of the locking pin body and the groove walls of the two sides of the radial direction of the locking sliding groove. The positioning pin of the locking pin body is formed by combining a cylinder body and a cone, a shaft shoulder is formed at the section change position of the positioning pin, the positioning of the locking spring along the radial inner side end is realized, and a cylindrical surface moving pair is formed between the outer ring surface of the locking pin body, the locking eyelet of the clamping jaw sleeve and the locking blind hole of the butt-joint clamping jaw. The locking screw is in threaded connection to axially fix the automatic locking body in the locking hole of the jaw sleeve, a shaft shoulder is formed at the section change position of the radial inner side end of the locking screw, the positioning of the outer side end of the locking spring is realized, and therefore the locking spring extends, pushes the locking pin body to axially slide and then inserts into the locking blind hole of the butt joint jaw, and the underwater automatic locking between the butt joint jaw and the jaw sleeve is realized.

The centering support and the butt-joint support respectively comprise three pairs, the centering support is arranged outwards along the radial direction and uniformly welded on the outer ring surface of a slip disc of a rear clamping body of the inner slip centering device along the circumferential direction, the butt-joint support is horizontally arranged and welded on the end surface of the inner side of the clamping jaw sleeve along the axial direction, and the position of each pair of butt-joint supports along the circumferential direction corresponds to each guide support and each pair of centering supports. Every contains the branch seat of two the same specifications and structure to centering support and butt joint support, and the branch seat of centering support and butt joint support forms by semi-circular steel piece and square steel piece combination, and the middle part of every branch support sets up circular punchhole, and centering support configuration centering round pin axle links to each other with cutting ferrule pneumatic cylinder, and butt joint support configuration butt pin axle links to each other with cutting ferrule pneumatic cylinder piston rod simultaneously to it is as an organic whole to link interior slips centralizer and cutting ferrule butt joint ware.

The clamping sleeve type hydraulic drive connecting device comprises two sets of independent hydraulic driving systems, namely a centering hydraulic drive device and a clamping sleeve type hydraulic drive device, and provides propulsion power for the slip centering device and the clamping sleeve type butting device respectively, so that the quick connection of a deepwater oil-gas pipeline is realized. The centering liquid driver realizes the rotation opening and the rotation closing of the front clamping body and the front guide disc through the slip support, and respectively completes the underwater rapid clamping between the inner slip centering device, the front guide disc, the connecting pipe and the outer slip centering device and the deepwater oil-gas pipeline, the centering liquid driver comprises two independent centering hydraulic cylinders, the inner slip centering device and the outer slip centering device are respectively provided with one centering hydraulic cylinder, and the centering hydraulic cylinders are respectively and horizontally arranged along the circumferential direction. The cutting sleeve liquid driver is simultaneously connected with the centering support, the guide support and the butt-joint support and completes axial propulsion of the cutting sleeve butt-joint device, the cutting sleeve liquid driver adopts three independent cutting sleeve hydraulic cylinders which are uniformly distributed along the circumferential direction of the rear clamping body and the rear guide disc, and each cutting sleeve hydraulic cylinder is axially arranged.

All independent centering hydraulic cylinders and clamping sleeve hydraulic cylinders adopt plunger type hydraulic cylinders, and bidirectional driving of piston rods of the centering hydraulic cylinders is realized through hydraulic oil passing through oil passages on two sides of cylinder barrels of the centering hydraulic cylinders and hydraulic oil returning through oil return pipelines, so that rotary opening and rotary closing of the inner slip centering device, the outer slip centering device and the front guide disc during underwater automatic clamping are completed; meanwhile, the two-way driving of the piston rod of the cutting sleeve hydraulic cylinder is realized through the hydraulic oil of the oil passage at the two sides of the cylinder barrel of the cutting sleeve hydraulic cylinder and the return hydraulic oil of the oil return pipeline, so that the axial pushing during underwater automatic butt joint of the cutting sleeve butt joint device is completed.

The process of the deepwater quick centering operation comprises the following steps that a pipe end connector is centered underwater with a deepwater oil and gas pipeline through a crane and is sleeved on a prefabricated ring surface of the deepwater oil and gas pipeline, then a screw is screwed, and a sealing ring in a connector ring cavity is extruded through a shaft pressing sleeve, so that the pipe end connector and the pipe side end of the deepwater oil and gas pipeline are fixedly connected and sealed; then, opening front clamping bodies and front guide discs of the inner slip centering device and the outer slip centering device according to the rotation of the centering liquid driver, and hoisting the assembled slip centering device, centering liquid driver, rod type guide, cutting sleeve liquid driver and cutting sleeve butt joint device to the pipe side end of the deepwater oil and gas pipeline through a crane and preliminarily centering the cutting sleeve butt joint device with the pipe end connector; and then, the front clamping bodies of the inner slip centering device and the outer slip centering device are closed by rotating the centering liquid driver, the front guide disc is connected to the connecting pipe, meanwhile, a guide rod body of the auxiliary guide rod is matched with the tooth-groove bottom surface of the double-butt-joint teeth of the clamping claw sleeve, then the stud is screwed, the inner slip centering device is clamped on the outer ring surface of the connecting pipe, and the outer slip centering device is clamped on the outer ring surface of the deepwater oil-gas pipeline.

The process of the deepwater axial guiding ferrule type quick butt joint operation comprises the steps of loosening a screw of a pipe end connector, embedding a rectangular clamping fin of a guiding head into a rectangular ring groove of the pipe end connector according to the axial centering action of a slip centering device and a crane, and completing underwater quick centering of the guiding head and the pipe end connector; then, according to the propelling power provided by the clamping sleeve hydraulic drive device and the axial guiding action of the rod type guiding device, the clamping jaw sleeve axially slides along a half-cylindrical surface sliding pair between the clamping jaw sleeve and the main guiding rod and between the clamping jaw sleeve and the auxiliary guiding rod, and pushes the butt-joint clamping jaw to rotate around the conical top of the clamping jaw screwing conical surface of the clamping jaw, the clamping jaw clamping grooves of the butt-joint clamping jaws which are arranged in a squirrel-cage manner are matched with the guiding coupling of the guiding head and the pipe end coupling of the connecting head at the same time, and finally, the clamping jaw anti-thrust conical surface of the butt-joint; then, a sealing ring body of a trapezoidal sealing ring is extruded by a double-ring conical sealing cavity between the guide head and the connector, so that metal static sealing between the rod guide and the pipe end connector is realized, underwater rapid butt joint between the rod guide and the pipe end connector is completed, then a screw is screwed, and a sealing ring in a connector ring cavity is extruded by a shaft pressing sleeve, so that fixed connection and sealing between the pipe end connector and the side end of the deepwater oil and gas pipeline are realized; and finally, the locking spring of the automatic locking body extends and pushes the locking pin body to slide along the axial direction and then insert into the locking blind hole of the butt joint clamping jaw, so that the underwater automatic locking between the butt joint clamping jaw and the clamping jaw sleeve is realized.

The clamping sleeve type liquid drive connecting device has the technical effects that an axial symmetric structure and metal static seal are adopted, deep water quick centering operation is carried out according to the slip centering device and the centering liquid drive device, and meanwhile, deep water axial guiding clamping sleeve type quick butting operation is carried out through the rod type guiding device, the clamping sleeve butting device and the clamping sleeve type liquid drive device, so that the underwater quick connection of a deep water oil and gas pipeline is finally completed; the pipe end connector is connected to the pipe side end of a deepwater oil and gas pipeline, the slip centering device is clamped on the outer ring surfaces of the connecting pipe and the deepwater oil and gas pipeline respectively according to the propelling power provided by the centering liquid driver, the axial centering effect when the rod type guiding device is in butt joint with the pipe end connector is achieved, the rod type guiding device achieves the axial guiding effect when the clamping sleeve butt joint device is in underwater butt joint according to a spline guide rail between the main guiding rod and the clamping jaw sleeve and a half-cylindrical surface moving pair between the auxiliary guiding rod and the clamping jaw sleeve, the clamping sleeve butt joint device achieves underwater quick butt joint between the guiding rod type and the pipe end connector according to the propelling power provided by the clamping sleeve liquid driver and the butt joint clamping jaws arranged in a squirrel-cage mode, and the underwater self-locking effect between.

Drawings

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.

Fig. 1 is a typical structural sketch of a deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connecting device provided by the invention.

FIG. 2 is a schematic structural diagram of a slip centering device and a centering liquid driver in an axial guiding and centering cutting sleeve type liquid driving connection device of a deepwater oil and gas pipeline.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a schematic structural diagram of a pipe end joint in the deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid driving connection device.

Fig. 5 is a schematic structural diagram of a rod-type guide and a ferrule hydraulic drive in the deep water oil and gas pipeline axial guide centering ferrule hydraulic drive connecting device.

Fig. 6 is a left side view of fig. 5.

Fig. 7 is a schematic structural diagram of a cutting sleeve butt connector in the deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connecting device.

Fig. 8 is a left side view of fig. 7.

FIG. 9 is a schematic view of a deep water rapid centering operation flow of the deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device.

FIG. 10 is a schematic view of a deep water axial guiding ferrule type quick butt joint operation flow of the deep water oil and gas pipeline axial guiding centering ferrule type liquid drive connection device.

In the figure 1-slip centering device, 2-centering liquid driving device, 3-rod type guiding device, 4-cutting sleeve liquid driving device, 5-cutting sleeve butting device, 6-pipe end joint, 7-deep water oil gas pipeline, 8-inner slip centering device, 9-outer slip centering device, 10-centering pin shaft, 11-centering support, 12-centering hydraulic cylinder barrel, 13-clamping pin shaft, 14-centering hydraulic cylinder piston rod, 15-slip pin shaft, 16-slip support, 17-front clamping body, 18-rear clamping body, 19-connecting head, 20-shaft pressing sleeve, 21-hydraulic cylinder barrel, 22-guiding cutting sleeve support, 23-cutting sleeve hydraulic cylinder piston rod, 24-rear guiding disk, 25-connecting pipe, 26-guiding head, 27-trapezoidal sealing ring, 28-main guiding rod, 29-auxiliary guiding rod, 30-front guiding disk, 31-butting support, 32-butting pin shaft, 33-automatic locking body, 34-clamping claw sleeve, 35-butt joint jaws.

Detailed Description

In fig. 1, the deep water oil gas pipeline axial guiding centering cutting sleeve type liquid drive connecting device mainly comprises a slip centering device 1, a centering liquid drive device 2, a rod type guide device 3, a cutting sleeve type liquid drive device 4, a cutting sleeve butt-joint device 5 and a pipe end joint 6, the cutting sleeve type liquid drive connecting device adopts an axial symmetric structure and metal static seal, and implements deep water quick centering operation according to the axial centering action of the slip centering device 1 and the propelling power provided by the centering liquid drive device 2, and implements deep water axial guiding cutting sleeve type quick butt-joint operation through the axial guiding action of the rod type guide device 3, the quick butt-joint and self-locking action of the cutting sleeve butt-joint device 5 and the propelling power provided by the cutting sleeve type liquid drive device 4, and finally completes the underwater quick connection of a deep water oil gas pipeline 7.

In fig. 1, a slip centering device 1 of the deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connecting device adopts a split structure and is connected with a centering liquid drive device 2, an inner slip centering device and an outer slip centering device of the slip centering device 1 respectively clamp a connecting pipe of a rod type guiding device 3 and a deep water oil and gas pipeline 7, the rod type guiding device 3, a cutting sleeve butting device 5 and a pipe end connector 6 are sequentially and coaxially arranged from inside to outside along the axial direction, and meanwhile, the inner slip centering device of the slip centering device 1, the rod type guiding device 3 and the cutting sleeve butting device 5 are connected into a whole through cutting sleeve hydraulic cylinders of the cutting sleeve type liquid drive device 4.

In figure 1, before the deepwater oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connecting device is assembled, the outer surfaces of main body parts of a slip centering device 1, a rod type guiding device 3, a cutting sleeve butting device 5 and a pipe end connector 6 are respectively subjected to paint spraying and corrosion preventing treatment, the outer surfaces of a centering hydraulic cylinder barrel of the centering hydraulic driver 2 and a clamping sleeve hydraulic cylinder barrel of the clamping sleeve hydraulic driver 4 are coated with glass fiber reinforced plastics, the outer ring surface of a pipe end joint 6 sleeved on a deep water oil and gas pipeline 7 is flexible to move without blocking, a claw sleeve of the clamping sleeve butt-joint device 5 is normally slid along a main guide rod and an auxiliary guide rod of a rod-type guide device 3 without blocking, and the inner walls of the front clamping body and the rear clamping body of the slip centering device 1 and the connecting pipe of the rod-type guider 3 are kept clean, and finally, whether the trapezoidal sealing ring of the rod-type guider 3 is damaged or not is checked, and whether the connection part of each pin shaft and the thread is firm or not is checked.

In fig. 1, the deep water oil gas pipeline axial guiding centering cutting sleeve type liquid drive connecting device is assembled in the process that a bearing bush of a front clamping body and a shaft sleeve of a rear clamping body are simultaneously matched with a clamping pin shaft so as to connect the front clamping body of a slip centering device 1 with the rear clamping body, a centering hydraulic cylinder of a centering liquid drive device 2 is respectively connected with an inner slip centering device and an outer slip centering device of the slip centering device 1 through a slip support and the slip pin shaft, butt joint jaws of a cutting sleeve butt joint device 5 are uniformly arranged on the outer ring surface of a guide head of a rod type guide device 3 along the circumferential direction through a slip sleeve, an automatic locking body of the cutting sleeve butt joint device 5 is arranged in a locking hole of the slip sleeve through a locking screw, a trapezoidal sealing ring of the rod type guide device 3 is embedded in the inner wall of the guide head of the rod type guide device, a rear guiding disc of the rod type guide device 3 is fixed on the guide head through a double-headed stud, a main guide rod of the rod type guide device 3 penetrates through a The inner slip centering device and the outer slip centering device of the rod guide device 1 are connected into a whole through a rear clamping body and a rear guide disc, an auxiliary guide rod of the rod guide device 3 spans double butt joint teeth of a clamping claw sleeve and connects the inner slip centering device, a front clamping body of the outer slip centering device and the front guide disc into a whole through a threaded joint of the auxiliary guide rod, and finally the inner slip centering device and the clamping sleeve butt joint device 5 of the slip centering device 1 are connected into a whole through a centering support and a centering pin shaft and connected with a clamping sleeve hydraulic cylinder piston rod through the butt joint support and the butt joint pin shaft, and meanwhile, a clamping sleeve hydraulic cylinder of a clamping sleeve hydraulic drive device 4 is fixed on the rod guide device 3 through a guide support.

In fig. 2 and 3, the slip centering device 1 includes an inner slip centering device 8 and an outer slip centering device 9, the diameters of the inner walls of the annular cavities of a front clamp body 17 and a rear clamp body 18 of the inner slip centering device 8 and the outer slip centering device 9 are both consistent with the outer diameter of the deepwater oil and gas pipeline 7, the specification of a clamping pin shaft 13 for connecting the front clamp body 17 and the rear clamp body 18 needs to consider the factors such as shear stress caused by additional acting force generated by the offset of the rod-type guide device 3 and the deepwater oil and gas pipeline 7, and the push stroke design of a piston rod 14 of a centering hydraulic cylinder in the centering hydraulic drive 2 needs to comprehensively consider the factors such as the outer diameter of the deepwater oil and gas pipeline 7, the outer diameter of a connecting pipe of the rod-type guide device 3, the external dimension of a split slip support in each set of slip.

In fig. 2 and 3, the inner slip centralizer 8 and the outer slip centralizer 9 of the slip centralizer 1 perform deep water rapid centralizing operation according to the propelling power provided by the centralizing hydraulic driver 2, the inner slip centering device 8 and the outer slip centering device 9 are respectively clamped on the outer ring surfaces of a connecting pipe of the rod-type guider 3 and the deepwater oil-gas pipeline 7, a square clamping block of a front clamping body 17 is matched with a rectangular clamping groove of a rear clamping body 18, a bearing bush of the front clamping body 17 and a shaft sleeve of the rear clamping body 18 are simultaneously matched with a clamping pin shaft 13, a rectangular groove is arranged at the top end of a slip separating support of each slip support 16, a slip pin shaft 15 is configured to be respectively hinged with a centering hydraulic cylinder barrel 12 and a centering hydraulic cylinder piston rod 14, the centering hydraulic drive 2 thus effects a rotary opening and closing of the front clamping body 17 and the front guide disk of the rod guide 3 via the clamping shoe 16, and the centering shoe 11 is furthermore equipped with the centering pin 10 and is connected to the cylinder of the clamping cylinder hydraulic drive 4.

In fig. 4, the specification of the pipe end joint 6 is consistent with the outer diameter of the deepwater oil and gas pipeline 7, the axial length of the connector 19 is consistent with the axial length of the prefabricated ring surface of the deepwater oil and gas pipeline 7, the sealing ring of the pipe end joint 6 is placed in the ring cavity of the connector 19, and the specification of the sealing ring needs to comprehensively consider the factors such as the physical property and the maximum conveying pressure of the oil and gas medium in the deepwater oil and gas pipeline 7, the physical property and the pressure of seawater around the deepwater oil and gas pipeline 7, the pipe diameter of the deepwater oil and gas pipeline 7 and the like.

In fig. 4, the pipe end joint 6 is connected to the pipe side end of the deepwater oil and gas pipeline 7 and comprises a joint 19, a shaft pressing sleeve 20 and a sealing ring, a pipe end collar of the joint 19 is matched with the inner wall of an annular cavity of a butt joint jaw of the cutting sleeve butt joint device 5, the shaft pressing sleeve 20 is connected with the joint 19 through a flange plate and a screw of the shaft pressing sleeve 20, and the sealing ring in the inner wall of the annular cavity of the joint 19 is pressed through a thin-wall cylinder of the shaft pressing sleeve 20, so that the fixed connection and the sealing between the pipe end joint 6 and the deepwater oil and gas pipeline.

In fig. 5 and 6, the rod guide 3 includes three main guide rods 28 and three auxiliary guide rods 29, the diameters of the inner walls of the rear guide plate 24 and the front guide plate 30 are consistent with the outer diameter of the deepwater oil and gas pipeline 7, the strength design of the main guide rods 28 and the auxiliary guide rods 29 needs to consider the bending stress and bending deformation caused by the additional acting force generated by the deviation of the rod guide 3 and the deepwater oil and gas pipeline 7, the axial lengths of the main guide rods 28 and the auxiliary guide rods 29 are designed according to the distance between the inner slip centering device 8 and the outer slip centering device 9, and the specification of the trapezoidal sealing ring 27 needs to select the model after comprehensively considering the physical property and maximum delivery pressure of the oil and gas medium in the deepwater oil and gas pipeline 7, the pipe diameters of the deepwater oil and gas pipeline 7 and the connecting pipe 25, and other factors.

In fig. 5 and 6, the push stroke of the piston rod 23 of the ferrule hydraulic cylinder in the ferrule hydraulic driver 4 needs to be longer than the length of the locking sliding groove of the butt joint jaw of the ferrule butt-joint device 5 and shorter than the axial length of the guiding head 26, and the push stroke of the piston rod 23 of the ferrule hydraulic cylinder in the ferrule hydraulic driver 4 needs to ensure that the jaw clamping groove of the butt joint jaw of the ferrule butt-joint device 5 is simultaneously matched with the guiding collar of the guiding head 26 and the pipe end collar of the connecting head 19.

In fig. 5 and 6, the rod guide 3 realizes the axial guiding function of the underwater docking of the ferrule butt-connector 5 according to the spline guide rail between the main guide rod 28 and the ferrule sleeve of the ferrule butt-connector 5 and the half-cylindrical sliding pair between the auxiliary guide rod 29 and the ferrule sleeve, the connecting pipe 25 is respectively used for the axial fixed connection of the inner slip centering device 8 and the guide head 26, the spline teeth of the main guide rod 28 are matched with the rectangular spline hole of the rear guide plate 24 and the rectangular spline hole of the ferrule sleeve of the ferrule butt-connector 5, the guide rod body of the auxiliary guide rod 29 is matched with the guide round hole of the front guide plate 30 and the tooth bottom surface of the dual docking teeth of the ferrule sleeve, the two half annular clamping blocks of the guide bracket 22 are connected by screws to fix the ferrule hydraulic cylinder 21 on the rod guide 3, the sealing ring body of the trapezoidal sealing ring 27 is arranged in the double-ring tapered sealing cavity between the trapezoidal ring groove of the guide head 26 and the trapezoidal ring groove of the, and a metal static seal between the rod introducer 3 and the tube end fitting 6 is achieved. The cutting sleeve hydraulic driver 4 realizes the bidirectional driving of the cutting sleeve hydraulic cylinder piston rod 23 through the hydraulic oil passing through the oil passing pipelines on the two sides of the cutting sleeve hydraulic cylinder 21 and the hydraulic oil returning through the oil returning pipelines, thereby completing the axial propulsion of the cutting sleeve butt-joint device 5 during underwater butt-joint.

In fig. 7 and 8, the ferrule adapter 5 realizes the underwater self-locking function between the jaw sleeve 34 and the docking jaw 35 through the automatic locking body 33, the specification of the jaw sleeve 34 is consistent with the specification of the connector 19 and the guidance head 26, and the jaw clamping groove of the docking jaw 35 needs to be designed by considering the factors such as the maximum clamping force transmitted between the guidance collar of the guidance head 26 and the pipe end collar of the connector 19 when the trapezoid sealing ring 27 forms the metal static seal.

In fig. 7 and 8, the ferrule butt-connector 5 completes underwater fast butt-connection between the rod-type guide 3 and the pipe-end connector 6 according to the propelling power provided by the ferrule hydraulic driver 4 and the butt-connection claws 35 arranged in a squirrel-cage manner, the automatic locking body 33 is arranged in the locking hole of the claw sleeve 34, the claw sleeve 34 axially pushes the butt-connection claws 35 and the butt-connection claws 35 rotate around the conical tops of the claw screwing conical surfaces thereof, finally, the claw clamping grooves of the butt-connection claws 35 are matched with the guide collar of the guide head 26 and the pipe-end collar of the connector 19, the conical surfaces of the outer claw semi-conical surfaces of the butt-connection claws 35 are matched with the inner wall of the annular cavity of the claw sleeve 34, the automatic locking body 33 realizes underwater automatic locking between the butt-connection claws 35 and the claw sleeve 34, the centering support 11 is provided with the centering pin shaft 10 and connected with the ferrule of the ferrule hydraulic cylinder 21, and the support 31 is, thereby connecting the inner slip centralizer 8 and the ferrule adapter 5 into a whole.

In fig. 9, the first step of the deep water fast centering operation flow of the deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device is that an underwater sander is used to complete the prefabrication work of the prefabricated ring surface of the deep water oil and gas pipeline 7, a crane on a construction ship is used to hoist the pipe end joint 6 to the pipe side end of the deep water oil and gas pipeline 7 and perform centering downwards, then the pipe end joint 6 is sleeved on the prefabricated ring surface of the deep water oil and gas pipeline 7, an underwater robot is used to screw a screw and extrude a sealing ring in an annular cavity of the connector 19 through a shaft pressing sleeve 20, and the fixed connection and the sealing between the pipe end joint 6 and the pipe side end of the deep water oil and gas pipeline 7 are completed.

In fig. 9, the second step of the deep water fast centering operation flow of the deep water oil gas pipeline axial guiding centering cutting sleeve type liquid drive connecting device is that the oil return pipeline of the centering hydraulic cylinder 12 of the centering liquid drive 2 returns hydraulic oil, the front clamping body 17 and the front guiding disc 30 of the inner slip centering device 8 and the outer slip centering device 9 are opened by the power provided by the centering hydraulic cylinder piston rod 14 and the slip support 16 in a rotating way, and then the assembled slip centering device 1, centering liquid drive 2, rod type 3, cutting sleeve liquid drive 4 and cutting sleeve guide butt-joint device 5 are hoisted to the pipe side end of the deep water oil gas pipeline 7 by a crane together and finish primary centering with the pipe end joint 6.

In fig. 9, the third step of the deep water fast centering operation flow of the deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid driving connection device is that the centering hydraulic cylinder 12 of the centering liquid driving device 2 is communicated with the oil pipeline to be communicated with hydraulic oil, the inner slip centering device 8 and the front clamping body 17 of the outer slip centering device 9 are closed by the slip support 16 through the propelling power provided by the centering hydraulic cylinder piston rod 14, the front guide disc 30 is connected to the connection pipe 25, the guide rod body of the auxiliary guide rod 29 is matched with the tooth bottom surface of the double butt teeth of the jaw sleeve 34, then the underwater robot is used for screwing the stud and tightly clamping the inner slip centering device 8 on the outer ring surface of the connection pipe 25, and simultaneously, the outer slip centering device 9 is tightly clamped on the outer ring surface of the deep water oil and gas pipeline 7.

In fig. 10, the first step of the deep water axial guiding and centering cutting sleeve type quick butt joint operation flow of the deep water oil and gas pipeline axial guiding and centering cutting sleeve type liquid drive connection device is that an underwater robot is used for loosening a screw of a shaft pressing sleeve 20, and according to the axial centering action of a slip centering device 1 and a cylindrical surface moving pair between a connecting head 19 and a prefabricated ring surface of a deep water oil and gas pipeline 7, a pipe end joint 6 slides inwards and axially along the prefabricated ring surface of the deep water oil and gas pipeline 7 through a crane until a rectangular clamping fin of a guiding head 26 is embedded into a rectangular ring groove of the connecting head 19, so that underwater quick centering of the guiding head 26 and the pipe end joint 6 is completed.

In fig. 10, the second step of the deep water axial guiding ferrule type fast butt joint operation flow of the deep water oil gas pipeline axial guiding centering ferrule type liquid driving connection device is that the ferrule hydraulic cylinder 21 of the ferrule hydraulic driver 4 is communicated with the oil pipeline to be communicated with hydraulic oil, the ferrule hydraulic cylinder piston rod 23 provides propulsion power and is guided by the rod type guider 3 axially, the jaw sleeve 34 slides axially outwards along the spline guide rail between the jaw sleeve 34 and the main guide rod 28 and the half-cylindrical surface moving pair between the jaw sleeve 34 and the auxiliary guide rod 29, and thereby the butt joint jaw 35 is pushed to rotate around the conical top of the jaw screwing conical surface of the butt joint jaw 35, and the butt joint jaw 35 arranged in a squirrel-cage type pushes the pipe end connector 6 to further slide axially inwards along the prefabricated ring surface of the deep water oil gas pipeline 7 until the jaw clamping groove of the butt joint jaw 35 is simultaneously matched with the guiding collar of the butt joint head 26 and the collar of the connector 19, and the claw thrust conical surface of the butt-joint claw 35 is closely attached to the outer annular surface of the connector 19.

In fig. 10, the third step of the deep water axial guiding ferrule type fast docking operation flow of the deep water oil and gas pipeline axial guiding centering ferrule type liquid drive connection device is that the ferrule clamping grooves of the docking ferrule 35 simultaneously press the guiding coupling of the guiding head 26 and the pipe end coupling of the connecting head 19, then the sealing ring body of the trapezoidal sealing ring 27 is pressed through the double-ring conical sealing cavity between the guiding head 26 and the connecting head 19, the cylindrical fin sleeve of the trapezoidal sealing ring 27 is deformed and fills the strip-shaped ring groove of the guiding head 26, and simultaneously the sealing ring body of the trapezoidal sealing ring 27 is deformed on the groove top surface and the outer side groove surface of the trapezoidal ring groove of the connecting head 19 and the groove top surface and the inner side groove surface of the trapezoidal ring groove of the guiding head 26 respectively, thereby realizing metal static sealing between the rod type guiding device 3 and the pipe end joint 6 and completing underwater fast docking between the rod type guiding, and finally, the locking spring of the automatic locking body 33 extends, pushes the locking pin body to slide along the axial direction and then inserts into the locking blind hole of the butt joint claw 35, and thus, the underwater automatic locking between the butt joint claw 35 and the claw sleeve 34 is realized.

In fig. 10, the fourth step of the deepwater axial guiding and centering cutting sleeve type quick butt joint operation flow of the deepwater oil and gas pipeline axial guiding and centering cutting sleeve type hydraulic drive connecting device is that the underwater robot is used for sequentially pulling out the butt joint pin shaft 32, simultaneously the cutting sleeve hydraulic cylinder 21 of the cutting sleeve type hydraulic drive 4 returns hydraulic oil to the oil pipeline, the cutting sleeve hydraulic cylinder piston rod 23 retracts to the original state, then the underwater robot is used for unscrewing the screw joints of the main guide rod 28 and the rear clamping body 18 of the outer cutting sleeve centering device 9 and the nuts between the screw joints of the auxiliary guide rod 29 and the front clamping body 17 of the outer cutting sleeve centering device 9, the underwater robot is used for sequentially unscrewing the stud on the rear guide disc 24 and the studs on the front clamping body 17 and the rear clamping body 18, then the main guide rods 28 and the rectangular spline holes of the clamping jaw sleeve 34 are separated, then the cutting sleeve hydraulic cylinders of the hydraulic drive 4 are disassembled, and nuts between the main guide rod 28 and the auxiliary guide rod 29 and the front clamping body 17 and the rear clamping body 18 of the outer slip centralizer 9 are screwed, and finally, the slip centralizer 1, the centering liquid driver 2, the ferrule liquid driver 4, the rear guide disc 24, the front guide disc 30, the main guide rod 28, the auxiliary guide rod 29 and the guide support 22 in the rod type guide 3 are hoisted and recovered to a construction ship by using a crane.

The above embodiments are only used for illustrating the present invention, and the structure, connection mode and the like of each component can be changed, and all equivalent changes and improvements made on the basis of the technical scheme of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A deepwater oil and gas pipeline axial guide centering cutting sleeve type liquid drive connecting device mainly comprises a slip centering device, a rod type guide device, a pipe end joint, a cutting sleeve butt-joint device, a centering liquid drive device and a cutting sleeve liquid drive device, wherein the slip centering device comprises an inner slip centering device and an outer slip centering device, the slip centering device is connected with the centering liquid drive device, the rod type guide device, the cutting sleeve butt-joint device and the pipe end joint are sequentially coaxially arranged from inside to outside along the axial direction, and the inner slip centering device, the rod type guide device and the cutting sleeve butt-joint device are connected into a whole through the cutting sleeve liquid drive device; this cutting ferrule formula liquid drives connecting device drives the ware according to slips centralizer and centering liquid and implements the quick centering operation of deep water to implement the quick butt joint operation of deep water axial guidance cutting ferrule through rod-type guide, cutting ferrule butt joint ware and cutting ferrule liquid and drive the ware, accomplish the underwater high-speed joint of deep water oil gas pipeline, its characterized in that:

a slip centralizer; the slip centering device realizes the axial centering action when the rod-type guider is butted with the pipe end joint, an inner slip centering device of the slip centering device consists of a front clamping body, a rear clamping body, a centering support and a slip support, and an outer slip centering device consists of a front clamping body, a rear clamping body and a slip support; the front clamping body and the rear clamping body of the inner slip centering device and the outer slip centering device are sequentially provided with a slip body and a slip disc along the axial direction, the upper end parts of the slip bodies of the front clamping body and the rear clamping body are respectively provided with two groups of slip shaft sleeves, a bearing bush is arranged in the shaft sleeve of the front clamping body, and the lower end combining surface of the slip bodies of the front clamping body and the rear clamping body is respectively provided with a square clamping block and a rectangular clamping groove; the slip supports are divided into two groups, the inner slip centering device and the outer slip centering device are respectively provided with a group of slip supports, each group of slip supports is similar to an oxhorn shape, each group of slip supports comprises two sub-slip supports with the same specification and structure, and the top end of each sub-slip support is provided with a rectangular groove;

a pipe end fitting; the pipe end joint comprises a connector, a shaft pressing sleeve and a sealing ring, the connector adopts a thick-wall cylinder, a pipe end coupling and a joint body are sequentially arranged on the outer ring surface of the connector from inside to outside along the axial direction, a sealing clamping groove and a pipe end clamping ring are sequentially arranged on the inner wall of an annular cavity of the connector from inside to outside along the axial direction, the sealing clamping groove of the connector is formed by combining a rectangular annular groove and a trapezoidal annular groove, the sealing ring is arranged on the outer side of the pipe end clamping ring of the connector along the axial direction, and the shaft pressing sleeve is formed by combining a thin;

a rod-type guide; the rod-type guider realizes the axial guiding function of the clamping sleeve butting connector in underwater butting according to a spline guide rail between the main guide rod and the clamping jaw sleeve and a semi-cylindrical surface sliding pair between the auxiliary guide rod and the clamping jaw sleeve, and comprises a connecting pipe, a front guide disc, a rear guide disc, a main guide rod, an auxiliary guide rod, a guide support, a guide head and a trapezoidal sealing ring; the trapezoidal sealing ring is sequentially provided with a cylindrical clamping fin sleeve and a sealing ring body from inside to outside along the axial direction, the cylindrical clamping fin sleeve is formed by clamping fins which are uniformly arranged along the circumferential direction in a combined mode, and the connecting pipe is a long straight pipe body; the outer edges of the slip discs of the front guide disc and the inner slip centering device and the outer slip centering device are respectively provided with slip round holes and drag reduction grooves which are uniformly distributed along the circumferential direction, and the outer edges of the slip discs of the front guide disc and the outer slip centering device are provided with positioning clamping fins along the outer axial end surfaces; the outer ring surface of the seeker is sequentially provided with a guide clamping groove and a guide coupling from inside to outside along the axial direction, the outer end surface of the guide coupling of the seeker along the axial direction is provided with a rectangular clamping fin, the inner wall of a ring cavity of the seeker is sequentially provided with a connecting clamping ring and a sealing clamping groove from inside to outside along the axial direction, the sealing clamping groove of the seeker is formed by combining a strip-shaped ring groove and a trapezoidal ring groove, and the trapezoidal ring groove of the seeker and the trapezoidal ring groove of the connecting head are symmetrically arranged along the axial direction and form a double-ring conical sealing cavity; the rod type guide comprises three main guide rods and three auxiliary guide rods, the main guide rods and the auxiliary guide rods are long rod bodies with the same length and are composed of threaded joints and guide rod bodies, the guide rod bodies of the auxiliary guide rods are cylindrical rod bodies, and the guide rod bodies of the main guide rods are provided with spline teeth uniformly distributed along the circumferential direction; the guide support comprises three guide supports and two semi-annular clamping blocks, wherein each guide support comprises a square steel block and two semi-annular clamping blocks;

a ferrule dock; the clamping sleeve butt joint device completes underwater rapid butt joint between the rod type guide device and the pipe end connector and comprises a clamping jaw sleeve, a butt joint clamping jaw, an automatic locking body and a butt joint support; the inner wall of an annular cavity of the jaw sleeve is a conical surface, a wedge-shaped groove is formed in the inner side end of the annular cavity along the axial direction, a locking eyelet is formed in a barrel body of the jaw sleeve, a butt joint disc is arranged on the inner side of the outer annular surface of the jaw sleeve along the axial direction, rectangular spline holes which are uniformly distributed along the circumferential direction are milled in a rear disc body of the butt joint disc of the jaw sleeve, double butt joint teeth are arranged on a front disc body of the butt joint disc of the jaw sleeve, the cross section of each double butt joint tooth of the jaw sleeve is in the shape of a three-arc one-line segment, and the three-arc one-line segment of each double butt joint tooth sequentially consists of an; the butt joint clamping jaws are arranged in a squirrel-cage mode along the circumferential direction, the ring surface of the outer surface of each butt joint clamping jaw is sequentially provided with an inner clamping jaw semi-conical surface, a middle clamping jaw semi-conical surface and an outer clamping jaw semi-conical surface from inside to outside along the axial direction, the outer clamping jaw semi-conical surface is milled with a locking sliding groove, the bottom surface of the locking sliding groove is drilled with a locking blind hole along the outer side of the axial direction, the ring surface of the inner wall of each butt joint clamping jaw is sequentially provided with a clamping jaw screwing conical surface, a clamping jaw clamping groove and a clamping jaw thrust conical surface from inside to outside along the axial direction, and the clamping jaw clamping grooves of; the automatic locking body consists of a locking pin body, a locking spring and a locking screw, wherein two side ends of the locking pin body are respectively provided with a positioning pin and a sliding pin, the centering support and the butt joint support respectively comprise three pairs, and each pair of the centering support and the butt joint support comprises two sub-supports with the same specification and structure;

a pair of medium liquid driver and cutting sleeve liquid driver; the centering liquid driver and the clamping sleeve liquid driver respectively provide propulsion power for the slip centering device and the clamping sleeve butt connector, the centering liquid driver comprises two independent centering hydraulic cylinders, and the clamping sleeve liquid driver adopts three independent clamping sleeve hydraulic cylinders uniformly distributed along the circumferential direction of the rear clamping body and the rear guide disc.

2. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: deep water oil gas pipeline axial direction guide centering cutting ferrule formula liquid drives connecting device global design is the axial symmetry formula structure and adopts the metal static seal that trapezoidal sealing ring constitutes, and slips centralizer adopts split type structure and slips centralizer and outer slips centralizer chucking connecting pipe and deep water oil gas pipeline respectively in it, and the inside rubber silk that is equipped with evenly distributed of the sealing ring body of trapezoidal sealing ring.

3. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the inner slip centering device and the outer slip centering device are the same in specification and adopt split type structures, slip bodies of the front clamping body and the rear clamping body are symmetrically arranged along the axial direction, all groups of slip shaft sleeves of the slip bodies adopt shaft sleeves which are arranged at equal intervals along the axial direction, the shaft sleeves of the front clamping body and the rear clamping body are arranged in a staggered mode, and square clamping blocks of the front clamping body are matched with rectangular clamping grooves of the rear clamping body;

two branch slips supports in every group slips support of slips centralizer weld respectively in the slips body upper portion of the preceding card body and the back card body and along axial symmetry arrangement, and divide the slips support to form by isosceles trapezoid steel billet and square steel billet combination, divide the isosceles trapezoid steel billet slope of slips support to arrange, divide the square steel billet of slips support to arrange along vertical simultaneously.

4. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the pipe end joint is connected to the pipe side end of the deepwater oil and gas pipeline, the joint body of the joint adopts a stepped shaft structure, the top surface and the outer side groove surface of the trapezoidal annular groove of the joint sealing clamping groove are sealing contact positions of a trapezoidal sealing ring, the annular top surface of the joint pipe end clamping ring is precisely matched with the outer annular surface of the deepwater oil and gas pipeline to form a cylindrical surface moving pair, and the sealing ring in the inner wall of the joint annular cavity is connected in an extruding mode through the thin-wall cylinder body of the shaft pressing sleeve, so that the fixed connection and the sealing between the pipe end joint and the deepwater oil and gas pipeline are realized.

5. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the connecting pipe of the rod-type guider is in transition fit with the inner walls of the annular cavities of the front clamping body and the rear clamping body of the inner slip centering device and the inner walls of the annular cavities of the front guide disc and the rear guide disc, and the connecting pipe is in interference fit with the connecting snap ring of the guide head; the section of the sealing ring body of the trapezoidal sealing ring is in an isosceles trapezoid shape, and each clamping wing of the trapezoidal sealing ring adopts a semi-arch thin-wall cylinder body;

the guide clamping groove of a guide head in the rod-type guide is matched with the positioning clamping wings of the front guide disc and the rear guide disc, the rectangular clamping wing of the guide head is matched with the rectangular ring groove of the pipe end connector, the cylindrical clamping wing sleeve of the trapezoidal sealing ring is arranged in the strip-shaped ring groove of the guide head sealing clamping groove, the axial fixation of the trapezoidal sealing ring is realized, the top surface and the inner side groove surface of the trapezoidal ring groove of the guide head sealing clamping groove are the sealing contact parts of the trapezoidal sealing ring, and the sealing ring body of the trapezoidal sealing ring is arranged in the double-ring conical sealing cavity between the guide head and the connector, so that the metal static seal between the rod-type guide and the pipe end connector.

6. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the lower side end face of a front guide disc in the rod-type guide is tightly attached to the lower side end face of a rear guide disc, the lower side end face of a front clamping body slip disc is tightly attached to the lower side end face of a rear clamping body slip disc, the plane of the upper side end face of the front guide disc and the plane of the upper side end face of the rear guide disc are intersected with the central axis of the connecting pipe, the included angle between the two planes is larger than 45 degrees, the plane of the upper side end face of the front clamping body slip disc and the plane of the upper side end face of the rear clamping body slip disc are intersected with the central axis of the slip centering device, and the included angle between the two planes is larger than 45 degrees; the slip round holes of the front clamping body and the rear clamping body are staggered with the drag reduction grooves of the front clamping body and the rear clamping body, and meanwhile, the cylindrical surface where the axis of the guide round hole of the front guiding disc is located, the cylindrical surface where the rectangular spline hole central line of the rear guiding disc is located, the cylindrical surface where the axis of the slip round hole of the front clamping body is located and the cylindrical surface where the axis of the slip round hole of the rear clamping body is located are located on the same cylindrical surface.

7. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the threaded joints of a main guide rod and an auxiliary guide rod in the rod type guide are symmetrically arranged at two side ends of a guide rod body, and each spline tooth of the main guide rod adopts a rectangular flat key and is used as a spline guide rail when the jaw sleeve slides axially; two side ends of the main guide rod are respectively connected with the slip round holes of the rear clamping bodies of the inner slip centering device and the outer slip centering device through threaded joints of the main guide rod, and two side ends of the auxiliary guide rod are respectively connected with the slip round holes of the front clamping bodies of the inner slip centering device and the outer slip centering device through threaded joints of the auxiliary guide rod; the spline teeth of the main guide rod and the rectangular spline holes of the rear guide disc are in interference fit, the planes of the tooth surfaces at two sides of each spline tooth of the main guide rod are simultaneously in precise fit with the planes of the hole walls at two sides of each rectangular spline hole of the jaw sleeve, meanwhile, the guide rod body of the auxiliary guide rod and the guide circular hole of the front guide disc are in interference fit, and the outer ring surface of the guide rod body of the auxiliary guide rod and the tooth groove bottom surfaces of the double butt teeth of the jaw sleeve are precisely matched to form a semi-cylindrical surface moving pair;

the guide support of the rod-type guide device is arranged outwards along the radial direction and evenly welded on the outer ring surface of the rear guide disc along the circumferential direction, two ends of a square steel block of the guide support along the radial direction are respectively welded with a semi-ring-shaped clamping block on the inner side along the radial direction of the rear guide disc and the outer ring surface of the rear guide disc, and the two semi-ring-shaped clamping blocks of the guide support are connected through screws to fix the clamping sleeve hydraulic cylinder barrel on the rod-type guide device.

8. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the clamping jaw butt joint device is characterized in that a clamping jaw sleeve of the clamping sleeve butt joint device adopts a thick-walled cylinder body, an automatic locking body is arranged in a locking hole of the clamping jaw sleeve, the section of a butt joint disc of the clamping jaw sleeve is in a right trapezoid shape, an addendum arc where tooth tops of double butt joint teeth of the clamping jaw sleeve are located on an excircle of the surface of the butt joint disc and connected with a guide shifting line section through a transition convex arc, a guide rod concave arc is located at the bottom of a tooth groove of the double butt joint teeth, the circle center of a circle where the guide rod concave arc is located and the center of a rectangular spline hole of the clamping jaw sleeve are located on the same circle, the double butt joint teeth of the clamping jaw sleeve quickly capture a guide rod body of an auxiliary guide rod;

the centering support is arranged outwards along the radial direction and evenly welded on the outer ring surface of the slip disc of the back clamping body of the inner slip centering device along the circumferential direction, the butt-joint support is horizontally arranged along the axial direction and welded on the inner side end surface of the clamping jaw sleeve, the centering support is connected with the clamping sleeve hydraulic cylinder barrel, and the butt-joint support is connected with the clamping sleeve hydraulic cylinder piston rod.

9. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the taper of the conical surface where the semi-conical surface of the inner jaw of the butt joint jaw is located is equal to that of the conical surface where the semi-conical surface of the middle jaw is located, the semi-conical surface of the middle jaw of the butt joint jaw is matched with the conical surface where the wedge-shaped groove of the jaw sleeve is located, the conical surface where the semi-conical surface of the outer jaw of the butt joint jaw is located is matched with the inner wall of the annular cavity of the jaw sleeve, the groove bottom surface of the butt joint jaw locking sliding groove and the two side groove walls along the radial direction adopt planes, and the two side groove walls along the; the arc of the conical top of the screwing conical surface of the claw of the butt joint claw is always positioned on the bottom surface of the guide coupling of the guide head, so that the butt joint claw can rotate around the conical top of the screwing conical surface of the claw; the groove surfaces on two sides of the clamping groove of the clamping jaw of the butt joint clamping jaw adopt symmetrical conical surfaces and are used as contact surfaces when the guiding head and the connecting head are clamped, the clamping jaw thrust conical surface of the butt joint clamping jaw is formed by combining a cylindrical surface and a conical surface, and the cylindrical surface of the clamping jaw thrust conical surface is tightly attached to the outer ring surface of the connecting head;

the locking pin body of the automatic locking body adopts a stepped shaft, the sliding pin of the locking pin body is formed by combining a cylindrical surface and a hemispherical surface and is matched with the locking sliding groove of the butt joint clamping jaw, a single sliding high pair is formed between the hemispherical surface of the sliding pin of the locking pin body and the groove bottom surface of the locking sliding groove of the butt joint clamping jaw, and a double sliding high pair with coincident normal lines is formed between the cylindrical surface of the sliding pin of the locking pin body and the groove walls of the two sides of the locking sliding groove of the butt joint clamping jaw along the radial direction; the positioning pin of the locking pin body is formed by combining a cylinder and a cone, a shaft shoulder is formed at the section change position of the positioning pin of the locking pin body, the positioning of the locking spring along the radial inner side end is realized, and a cylindrical surface moving pair is formed between the outer ring surface of the locking pin body, the locking eyelet of the clamping jaw sleeve and the locking blind hole of the butt-joint clamping jaw; the locking screw forms a shaft shoulder at the section change position of the inner side end along the radial direction and realizes the positioning of the outer side end of the locking spring, so that the locking spring extends and pushes the locking pin body to slide along the axial direction and then insert into the locking blind hole of the butt joint clamping jaw, and the underwater automatic locking between the butt joint clamping jaw and the clamping jaw sleeve is realized.

10. The deep water oil and gas pipeline axial guiding centering cutting sleeve type liquid drive connection device according to claim 1, characterized in that: the centering liquid driver realizes the rotary opening and the rotary closing of the front clamping body and the front guide disc through the slip support, the inner slip centering device and the outer slip centering device are respectively provided with a centering hydraulic cylinder, and the centering hydraulic cylinders are respectively and horizontally arranged along the circumferential direction; the cutting sleeve liquid driver is simultaneously connected with the centering support, the guide support and the butt-joint support, axial propulsion of the cutting sleeve butt-joint device is completed, and each cutting sleeve hydraulic cylinder of the cutting sleeve liquid driver is axially arranged.