CN111255388A

CN111255388A - Opening clamping control device and method

Info

Publication number: CN111255388A
Application number: CN202010029481.4A
Authority: CN
Inventors: 刘磊; 杜玉山; 蒋龙; 孙友春; 郭士博; 蒋宇冰; 马魁勇; 王倩
Original assignee: China Petroleum and Chemical Corp; Exploration and Development Research Institute of Sinopec Shengli Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Exploration and Development Research Institute of Sinopec Shengli Oilfield Co
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-06-09
Anticipated expiration: 2040-01-10
Also published as: CN111255388B

Abstract

The invention discloses an opening clamping control device and method, which comprises a lower clamping device, wherein the lower clamping device is provided with an opening which is convenient for controlling radial translation to enter the lower clamping device; the upper clamping device is provided with an opening which is convenient for the pipe to move in a radial translation mode to enter the inner part of the upper clamping device; the lower supporting beam is provided with an opening which is convenient for the pipe to move radially and enter the inner part of the lower supporting beam; the lower clamping device is arranged on the lower support beam; the upper support beam is provided with an opening which is convenient for the pipe to move in a radial translation mode and enter the inner part of the upper support beam; the upper clamping device is arranged on the upper support beam; the upper end of the hydraulic loading oil cylinder is connected with the upper supporting beam, and the lower end of the hydraulic loading oil cylinder is connected with the lower supporting beam. The invention alternately clamps the pipe column and controls the pipe column to be lifted along with the hydraulic loading cylinder, prevents the pipe column from flying out of the well, and realizes safe, efficient, safe and environment-friendly operation of the high-pressure oil-water well of the deep low-permeability reservoir.

Description

Opening clamping control device and method

Technical Field

The invention relates to the technical field of deep low-permeability reservoir well operation, in particular to an opening clamping control device and method.

Background

The oil field is better exploited and developed for over fifty years, the newly increased and ascertained reserves are three-quarters deep low-permeability oil reservoirs every year, the oil reservoirs are deep in burial depth, poor in physical property, fast in yield decrement and low in accumulated yield, the oil reservoirs need to be effectively developed by supplementing energy such as later water injection, gas injection or polymer injection, the pressure in a large number of oil-water wells is uncertain as the water injection pressure is increased year by year and other yield-increasing measures such as oil well fracturing, acidizing and hole repairing are used in large quantities, well-blowout and pipe-jacking accidents can occur at any time during operation, and the safety and environmental protection accidents such as environmental pollution and flying pipe injury are caused. The reason for uncertain pressure in the well during operation of the deep low-permeability reservoir has the following two problems:

1. the oil-water well of deep low-permeability oil reservoir is mostly in a multi-layer system development mode, when a separate layer water injection process is adopted, the structure of a pipe column in the well is complex, the sealing elements of the packing device are made of elastic non-metal materials and are in a stretching state for a long time in the well, so that the elasticity of the sealing elements is weakened or eliminated, the sealing elements cannot contract and rebound after deformation, the oil sleeve annulus is blocked by the sealing elements, and the formation pressure is not continuously increased without a discharge passage.

2. The water injection (polymer) well has serious scaling and corrosion of a pipe column due to poor water quality or the action of a chemical agent, so that pores of an oil reservoir are blocked, and the pipe column is seriously blocked due to the phenomena of wax deposition, salt deposition, sand production and the like of some oil wells, which can cause formation pressure blockage and cannot release.

In the above situation, once the underground pipe column moves up and down during the operation of the oil-water well, the influence of a packing device in a shaft, wax scale, sand burying and the like is added, the lower stratum pressure can jump up to cause the pipe column to jack up, and well blowout or people injury accidents can be caused if the underground pipe column is not processed in time. If the well killing operation is adopted, the damage to an oil layer is large, and well killing fluid needs to be discharged, so that the environmental pollution is caused; if the upper pressurized operation equipment is used for loading and controlling the lifting of the tubular column, the cost is high, the equipment volume is large, and the transportation, installation and adjustment processes are various, at present, the elevator and the rope are mainly adopted to alternately hang the wellhead casing pipe upside down to control the lifting of the oil pipe, or the simple movable chuck is adopted to clamp the tubular column to prevent the lifting, and the two mechanical operation methods are complicated, poor in safety, high in labor intensity and low in efficiency. Therefore, the opening clamping control device is invented for the operation of the oil-water well with uncertain pressure in the deep low-permeability reservoir well, and the safe operation and the environmental protection of the operation of the oil-water well with uncertain pressure in the deep low-permeability reservoir well are guaranteed.

Application No.: 201520851106.2, filing date: 2015-10-26 discloses a wellhead chuck, whose main body is composed of two clamping flaps, a handle is welded at one end of the clamping flap A and connected with the clamping flap B through a clamping flap rotating shaft, the clamping flap A and the clamping flap B are made of high-strength metal plates, the clamping flap A and the clamping flap B are made into hexagonal bayonets which can be just clamped at the hexagonal position of a logging instrument, 4 sides of the hexagonal bayonets are on the clamping flap A, the other 2 sides are on the clamping flap B, the clamping flap A and the clamping flap B are connected by a connecting bolt, and the clamping flap A and the clamping flap B are tightly pressed by a locking nut, thus realizing the clamping of the wellhead chuck to the instrument, an instrument string can be hung at the wellhead of the chuck and can completely shield the wellhead, if the wellhead chuck is loosened, the locking nut is firstly, the connecting bolt is rotated, the connecting bolt can rotate around the bolt rotating shaft, then the clamping flap B rotates a certain angle around the clamping flap rotating shaft, at the moment, the hexagonal bayonet is changed into an opening bayonet, the logging instrument can be moved out of the wellhead chuck, and the instrument string is mounted and dismounted on a wellhead.

Application No.: 201010147010.X, filing date: 2010-04-14 a full hydraulic multifunctional wellhead device, comprising a wellhead workbench, a slide way arranged in the left and right direction is arranged on the wellhead workbench, a movable clamping seat is arranged on the slide way, the movable clamping seat is arranged into a left and a right block, a left and a right semicircular bayonets are symmetrically arranged at the butt joint of the two movable clamping seats, a taper hole seat is arranged in the bayonet, a taper centering guide seat is arranged in the taper hole seat, and a snap ring component is arranged in the taper centering guide seat; the drill rod or the casing pipe is clamped safely and reliably by adopting taper centering and flange positioning of the guide seat, wherein the clamping ring is centered by a taper circle, slides along the guide dead weight of the flange of the guide seat, is automatically clamped and self-locked, and can be quickly and conveniently replaced by clamping rings with different specifications; the buffer device can ensure that the clamping ring can be detached easily and conveniently when replaced under the condition of reliable clamping. The multifunctional full-hydraulic coal bed gas drilling machine can meet the drilling requirement of a multi-process method of the multifunctional full-hydraulic coal bed gas drilling machine, meets the diameter size requirement of lowering sleeves of various specifications, and has the advantages of complete functions, convenience and quickness in operation, safety and reliability in use and compact structure.

Application No.: 88208746.0, filing date: 1988-07-27A sucker rod polished rod clamping device comprises a clamping mechanism and a supporting mechanism, wherein a slip in the clamping mechanism is in inclined plane contact with the supporting mechanism, and the slip tightly clamps a sucker rod by utilizing the principle of inclined plane pressurization. The device is provided with an eyelet bolt, and the clamping mechanism can be tightly held in the supporting mechanism or loosened by adjusting a nut on the eyelet bolt. The device can be used for both shallow wells and deep wells, and can adapt to various standard sucker rods by replacing slips.

Application No.: 201610979241.4, filing date: 2016-11-08 relates to an oil recovery well head snubbing well sealing device, including the blowout preventer, still include and press from both sides tight sealer A and press from both sides tight sealer B, blowout preventer, press from both sides tight sealer A and press from both sides tight sealer B three from top to bottom through the pipe welding link to each other, the upside of blowout preventer is connected with the clamp joint, the downside that presss from both sides tight sealer A is connected with the ring flange that matches with the well head flange, the blowout preventer be cylindric structure, bilateral symmetry is provided with two mated blowout preventer valve plates in the blowout preventer, two blowout preventer valve plates respectively realize the reciprocating motion along the axis of blowout preventer through a lead screw. By the clamping sealer A or the clamping sealer B, when the packing is replaced, the pumping rod can be clamped by the clamping sealer A or the clamping sealer B, so that the pumping rod can be stably suspended on a well head, the requirement on a braking system of the pumping unit is reduced, and potential safety hazards are eliminated.

Application No.: 201810175957.8, filing date: 2018-03-02 discloses a wellhead assembly for out-of-control blowout rescue of an oil and gas well, which comprises a body, a full-closed sealing assembly, a sleeve sealing assembly, a slip assembly, an anti-sinking slip, a locking shaft, a hydraulic oil cylinder, a locking shaft seat and side doors, wherein the body is arranged on the anti-sinking slip, the side doors are connected to the body, the hydraulic oil cylinder is arranged in each side door, a hydraulic piston rod is arranged in each hydraulic oil cylinder, the front end of the hydraulic piston rod is connected with the full-closed sealing assembly, the sleeve sealing assembly and the slip assembly, three chambers are arranged in the body, the full-closed sealing assembly, the sleeve sealing assembly and the slip assembly are sequentially arranged from top to bottom, the locking shaft seat is connected to the side doors, the locking shaft is arranged on the locking shaft seat, sleeve holes are formed in the axial direction of the body. By adopting the invention, the wellhead installing efficiency can be obviously improved, and the times of the operation of emergency personnel close to the wellhead can be reduced.

Application No.: 201821966240.7, filing date: 2018-11-27 discloses a wellhead assembly for out-of-control blowout rescue of an oil and gas well, and relates to a wellhead assembly for out-of-control blowout rescue of an oil and gas well, which mainly comprises a sleeve sealing device, a sleeve clamping device and a flow guide device, wherein the flow guide device is a flow guide cover with a large horn shape from top to bottom, the upper part with a small inner diameter of the flow guide cover is communicated with the sleeve clamping device, the sleeve clamping device is a slip, and the upper part of the sleeve clamping device is connected with the sleeve sealing device. The number of times of personnel to well head operation in the well head resetting link is reduced, the intrinsic safety is realized, the well head resetting is changed from an eight-step method to a one-step method, and the emergency disposal efficiency of out-of-control ignition of the blowout of the oil and gas well is improved.

Application No.: 200920023755.8, filing date: 2009-03-13 relates to an open clamping and swiveling device mounted on a cantilever beam. The technical scheme includes that arc-shaped grooves are respectively prefabricated on opposite surfaces of two cross beams 12, a central shaft 6 with a U-shaped groove opening is arranged between the arc-shaped grooves of the two cross beams 12 in the penetrating mode, an opening gear 4 and an upper seat 2 are connected to the upper portion of the central shaft 6, a lower seat 8 is connected to the lower portion of the central shaft 6, the opening gear 4, the upper seat 2 and the lower seat 8 are clamped outside the upper arc-shaped groove and the lower arc-shaped groove of the cross beams 12, and U-shaped groove openings are coaxially formed along the central shaft 6. The rotary device can rotate automatically, can bear larger load, can enable the drill rod to smoothly pass through the drill rod discharging device when the drill rod is transferred between the wellhead and the two-layer platform, is matched with the existing drill rod discharging device for use, and has the characteristics of stable structure, safety, reliability and high operation efficiency.

Application No.: 201010541808.2 application date: 2010-11-01 provides a slip grip sucker rod blowout preventer. The single-gate sucker rod blowout preventer comprises a single-gate sucker rod blowout preventer body and a single-gate assembly, and the slip locking assembly comprises a slip, a slip seat, a slip locking shaft, a slip side door, a slip locking screw rod, a slip locking gland, a locking bolt and a limiting nut; the slip type clamping device is characterized in that slip cavities with slips inside are symmetrically arranged on two sides of a main drift diameter of the body, and slip side doors and slip locking glands are sequentially arranged on the outer sides of the slip cavities; the slip locking shaft is arranged in a reserved working gap on the outer side of the slip side door, the inner end of the slip locking shaft is connected with the slip, and the outer end of the slip locking shaft is provided with a limiting boss; the inner end of the slip locking screw rod is connected with the slip locking shaft, and the outer end of the slip locking screw rod is provided with a limiting nut; and a plurality of locking bolts are arranged on the slip locking gland. The structure is reasonable, the locking effect on the sucker rod is obviously enhanced, the phenomenon that the sucker rod is upward fleed, falls into the well bottom and leaks is effectively prevented, and the safety and reliability of the blowout preventer are improved.

The technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, and no technical inspiration exists in the above-disclosed technical documents for more technical features, technical problems to be solved, and advantageous effects thereof.

Disclosure of Invention

The invention aims to provide an opening clamping control device and a method, wherein an upper clamping device and a lower clamping device are connected with a hydraulic loading oil cylinder and a lower supporting beam, and are seated on a well head through a well head self-sealing rotary adjusting flange.

In order to achieve the purpose, the invention adopts the following technical scheme:

an open jam control device comprising:

the lower clamping device is provided with an opening which is convenient for the pipe to move in a radial translation mode to enter the lower clamping device;

the upper clamping device is provided with an opening which is convenient for the pipe to move in a radial translation mode to enter the inner part of the upper clamping device;

the lower supporting beam is provided with an opening which is convenient for the pipe to move radially and enter the inner part of the lower supporting beam; the lower clamping device is arranged on the lower support beam;

the upper support beam is provided with an opening which is convenient for the pipe to move in a radial translation mode and enter the inner part of the upper support beam; the upper clamping device is arranged on the upper support beam;

the upper end of the hydraulic loading oil cylinder is connected with the upper supporting beam, and the lower end of the hydraulic loading oil cylinder is connected with the lower supporting beam.

Further, still include:

the well mouth self-sealing rotary adjusting flange is provided with an opening which is convenient for the pipe to move radially and horizontally and enter the interior of the well mouth self-sealing rotary adjusting flange; the upper end of the well mouth self-sealing rotary adjusting flange is connected with the lower supporting beam, and the lower end of the well mouth self-sealing rotary adjusting flange is connected with the semi-full-sealing blowout preventer.

Further, still include:

and the upper end of the supporting leg is connected with the lower supporting beam.

Further, the lower or upper clamping device comprises:

the clamping shell is provided with a central through hole, an opening of the lower clamping device or an opening of the upper clamping device is communicated with the respective central through hole, and the clamping shell is also provided with a left radial hole and a right radial hole;

the left hydraulic cylinder telescopic slip is arranged in a left radial hole formed in the clamping shell; the left hydraulic cylinder telescopic slip comprises a left thrust cylinder, a left thrust piston and a left reducing slip, wherein the left thrust piston is arranged in the left thrust cylinder, the right end of the left thrust piston is connected with the left reducing slip, and the left reducing slip can extend into the central through hole;

the right hydraulic cylinder telescopic slip is arranged in a right radial hole formed in the clamping shell; the flexible slips of right pneumatic cylinder includes right thrust cylinder, right thrust piston, right reducing slips, and right thrust piston sets up in right thrust cylinder, and right reducing slips is connected to right thrust piston left end, and in right reducing slips can stretch into the central through-hole, left reducing slips can block the tubular column with right reducing slips meeting corresponding energy mutually.

Furthermore, an upper central hole is formed in the upper support beam, an opening formed in the upper support beam is communicated with the upper central hole, and a lower port of a clamping shell of the upper clamping device is connected with the upper support beam through a flange; and two ends of the upper supporting beam are respectively hinged with a hydraulic loading oil cylinder.

Furthermore, the lower support beam is provided with a lower central hole, the opening formed in the lower support beam is communicated with the lower central hole, and the lower port of the clamping shell of the lower clamping device is connected with the upper support beam through a flange; the lower supporting beam is provided with a hydraulic loading cylinder connecting hole for fixing the lower end of the hydraulic loading cylinder; the lower supporting beam is provided with a supporting leg connecting hole for fixing the supporting leg.

Further, the well head self-sealing rotary adjusting flange comprises:

the flange body is provided with an opening which is convenient for the pipe to move radially and horizontally and enter the flange body, the upper end of the flange body is connected with a lower supporting beam and is communicated with a lower central hole, and the lower end of the flange body is connected with a semi-full blowout preventer and is communicated with the blowout preventer;

the self-sealing rubber core can be arranged in the flange body, and the inner diameter of the upper port of the self-sealing rubber core is equal to the outer diameter of the pipe column.

Further, the proclaim oneself core of gluing includes:

the left half rubber core body is provided with a conical cavity inner wall and a positioning convex column;

the right half rubber core body is provided with a conical cavity inner wall and a positioning groove; the left half rubber core body and the right half rubber core body are mutually buckled together, and the positioning convex column is inserted in the positioning groove.

In order to achieve the above purpose, the invention adopts the following technical scheme that the control method of the opening clamping control device comprises the following steps:

when the pipe column is jacked up in the well during operation, the opening clamping device is standby on site, and when the pipe column is jacked up by the pressure in the well during construction, the integral device is arranged on the well mouth from the side surface of the pipe column through the openings of the upper clamping device, the lower clamping device, the well mouth self-sealing rotary adjusting flange, the upper supporting beam and the lower supporting beam; the lower clamping device is connected with the lower supporting beam through a long bolt, the well mouth self-sealing rotary adjusting flange is connected and fastened with the semi-full-sealing blowout preventer in a rotating mode, the two half structures of the self-sealing rubber core are respectively installed into the well mouth self-sealing rotary adjusting flange from two sides of the pipe column and are seated on the inner step surface of the well mouth self-sealing rotary adjusting flange, bottom hole pressure acts on the outer surface of the rubber core, and the outer surface of the self-sealing rubber core is extruded to seal the pipe column. The well mouth self-sealing rotary adjusting flange is used for facilitating the connection operation of the same-half full-sealing blowout preventer;

when the pipe column is lifted, the hydraulic loading cylinder is positioned at the lowest point, the lower clamping device is opened, the pipe column is clamped by the upper clamping device, the pipe column is lifted under the driving of the hydraulic loading cylinder, and when the hydraulic loading cylinder runs to the maximum stroke, the upper clamping device is opened after the pipe column is clamped by the lower clamping device; the upper clamping device is driven by the hydraulic loading oil cylinder to run to the lowest point, after the pipe column is clamped again, the lower clamping device is opened, and the pipe column is lifted to the maximum stroke by the hydraulic loading oil cylinder; repeating the steps until the pipe column coupling is exposed out of the upper surface of the lower clamping device; and at the moment, the lower clamping device is used for clamping the tubular column, the upper clamping device is opened and then is buckled, and the disassembled tubular column is hung down and then is continuously repeated to carry out tubular column lifting operation.

Further, when the pipe column is lowered, the hydraulic loading oil cylinder is located at the maximum stroke position, the upper clamping device is opened, the pipe column is clamped by the lower clamping device, and the upper buckling operation is carried out; after the upper buckling is finished, the lower clamping device is opened, the pipe column is clamped by the upper clamping device, the pipe column is lowered under the driving of the hydraulic loading oil cylinder, and when the hydraulic loading oil cylinder runs to the lowest point, the upper clamping device is opened after the pipe column is clamped by the lower clamping device; the upper clamping device is driven by the hydraulic loading cylinder to run to the maximum stroke, the lower clamping device is opened after the pipe column is clamped again, and the pipe column is lowered to the lowest point by the hydraulic loading cylinder. Repeating the steps until the pipe column coupling reaches the upper surface of the pipe descending clamping device; and at the moment, the pipe column is clamped by the lower pipe clamping device, and the upper pipe clamping device is opened and then the steps are continuously repeated to perform the pipe column lowering operation.

Compared with the prior art, the invention has the following beneficial effects:

1. the device adopts an opening scheme, installation is carried out before operation, when the pipe column is jacked up under the pressure in the well, the pipe column can be installed at any time at the well mouth, and the installation mode is flexible and convenient;

2. a two-layer platform is not used, so that the operation height is reduced, and the pipe string tripping efficiency is improved;

3. the jacking force on the pipe column is overcome, the pipe column is loaded and lifted, and the safe operation of the oil-water well is realized.

4. The self-sealing rubber core adopts a two-half structure, is arranged on a step surface in the self-sealing rotary adjusting flange of a well mouth from the side surface of the pipe column and is extruded by bottom hole pressure to form a sealing pipe column with a circular sealing surface.

Drawings

FIG. 1 is a schematic structural diagram of a wellhead when an opening clamping control device is installed in a conventional oil-water well for operation;

FIG. 2 is a schematic view of a wellhead during conventional oil-water well operation;

FIG. 3 is a top view of the lower support beam;

FIG. 4 is a schematic structural diagram of a wellhead self-sealing rotary adjusting flange;

FIG. 5 is a schematic structural view of two self-sealing rubber core structures;

FIG. 6 is a sectional top view of the upper and lower chucking devices;

FIG. 7 is a top view of a wellhead self-sealing rotary adjustment flange.

In the figure: 1-mounting a clamping device; 2-lower clamping device; 3-self-sealing rotary adjusting flange of the well mouth; 4-a half full seal blowout preventer; 5-big four-way of well head; 6-upper supporting beam; 7-hydraulic loading oil cylinder; 8-lower support beam; 9-supporting legs; 8-1-support leg connection hole; 8-2-hydraulic loading cylinder connecting hole; 8-3-lower pipe clamping device and rotary adjusting flange connecting hole; 8-4-opening.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1 to 7, the present invention provides a technical solution:

an open jam control device comprising:

the lower clamping device 2 is provided with an opening which is convenient for the pipe to move in a radial translation mode to enter the inner part of the lower clamping device;

the pipe clamping device comprises an upper pipe clamping device 1, wherein the upper pipe clamping device is provided with an opening which is convenient for pipe clamping to move in a radial translation mode to enter the inner part of the upper pipe clamping device;

the lower supporting beam 8 is provided with an opening which is convenient for the pipe to move radially and enter the inner part of the lower supporting beam; the lower clamping device is arranged on the lower support beam;

the upper support beam 6 is provided with an opening which is convenient for the pipe to move in a radial translation mode to enter the inner part of the upper support beam; the upper clamping device is arranged on the upper support beam;

and the upper end of the hydraulic loading oil cylinder is connected with the upper supporting beam, and the lower end of the hydraulic loading oil cylinder is connected with the lower supporting beam.

Further, still include:

the well mouth self-sealing rotary adjusting flange 3 is provided with an opening which is convenient for the pipe to move radially and horizontally and enter the interior of the well mouth self-sealing rotary adjusting flange; the upper end of the well mouth self-sealing rotary adjusting flange is connected with the lower supporting beam, and the lower end of the well mouth self-sealing rotary adjusting flange is connected with the semi-full-sealing blowout preventer.

Further, still include:

and the upper end of the supporting leg is connected with a lower supporting beam.

The lower clamping device or the upper clamping device is identical in structure and is identical to the structure of the semi-full blowout preventer 4 before an opening is not formed, namely, the opening is an improved part, and other structures are not changed and are the prior art.

Further, the lower or upper clamping device comprises:

The upper clamping device and the lower clamping device are of a blowout preventer structure and are in a half-section view as shown in figure 6, a bolt flange plate on the upper end surface or the lower end surface of a clamping shell is exposed in half, a telescopic slip of a right hydraulic cylinder is split, the upper clamping device and the lower clamping device mainly comprise a thrust piston 1-1, a reducing slip 1-2 and a clamping shell 1-3, the thrust piston 1-1, the reducing slip 1-2 and the clamping shell are horizontally arranged inside the clamping shell 1-3, the thrust piston 1-1 and the reducing slip 1-2 are connected in a concave-convex embedding mode, an opening 1-4 convenient for controlling radial translation to enter the clamping shell 1-3 is formed in the clamping shell 1-3, a hydraulic hole is formed in the clamping shell, the hydraulic hole is connected with an external hydraulic control system through a pipeline, hydraulic pressure enters the inside the clamping shell 1-3 through the hydraulic hole, the pipe column is clamped.

Further, the well head self-sealing rotary adjusting flange comprises:

the self-sealing rubber core 3-1 can be arranged in the flange body 3-2, and the inner diameter of the upper port of the self-sealing rubber core is equal to the outer diameter of the pipe column.

Further, the proclaim oneself core of gluing includes:

As shown in fig. 1, the opening clamping device comprises 1-an upper clamping device; 2-lower clamping device; 3-self-sealing rotary adjusting flange of the well mouth; 6-upper supporting beam; 7-hydraulic loading oil cylinder; 8-lower support beam; 9-support leg. The outside needs to be connected with a hydraulic power system to provide hydraulic power for the device. The upper clamping device 1 and the lower clamping device 2 are respectively connected and fastened with the upper supporting beam 6 and the lower supporting beam 8 through bolts. The hydraulic loading oil cylinder 7 supports the upper supporting beam 6 and is connected and fastened with the lower supporting beam 8. Two ends of the wellhead rotation adjusting flange 3 are respectively connected and fastened with the lower supporting beam 8 and the semi-full blowout preventer 4. The supporting legs 9 support the whole device, and adjusting holes are formed in the supporting legs.

As shown in figure 2, during normal operation, a half-full-seal blowout preventer 4 is arranged on a large four-way joint 5 of a wellhead for tubing tripping operation.

As shown in figure 3, the lower supporting beam 8 is connected and fastened with the supporting leg 9 through a supporting leg connecting hole 8-1, connected and fastened with the hydraulic loading cylinder 7 through a hydraulic loading oil cylinder connecting hole 8-2, and respectively connected and fastened with the lower clamping device 2 and the wellhead adjusting flange 3 through a lower clamping device and a rotary adjusting flange connecting hole 8-3, the size of the opening 8-4 is larger than the maximum diameter of a pipe column in the well, the same opening is also applied to the structures of the upper clamping device 1, the lower clamping device 2, the wellhead rotary adjusting flange 3 and the upper supporting beam 6, and the opening positions and the sizes are completely the same.

As shown in figure 4, the well mouth self-sealing rotary adjusting flange is connected and fastened with the lower supporting beam 8 and the semi-full-sealing blowout preventer 4 through well mouth bolts, a step surface is arranged in the well mouth self-sealing rotary adjusting flange, and the self-sealing rubber core 3-1 is arranged on the inner table surface.

As shown in figure 5, the self-sealing rubber core is designed into a two-half structure, and the pipe column is arranged into a seat from the side surface of the pipe column after being put into the hole and is arranged on the step surface in the self-sealing rotary adjusting flange of the well mouth. The two semi-circles are provided with concave-convex parts when viewed from the upper end face, the concave-convex parts are mutually spliced together to serve as a concave-convex positioning splicing structure, the concave-convex parts are mutually cut into and matched after being seated in the inner step face of the self-sealing rotary adjusting flange of the well mouth, and the concave-convex parts are mutually extruded under the action of external pressure to form a sealing tubular column with a circular sealing face.

FIG. 7 is a top view of the rubber core seat being placed into the wellhead self-sealing rotary adjusting flange.

The opening clamping device is operated by remote hydraulic control, and an external connection hydraulic power source provides hydraulic power for the upper clamping device 1, the lower clamping device 2 and the hydraulic loading oil cylinder 7. The upper clamping device 1 and the lower clamping device 2 are respectively connected and fastened with the upper supporting beam 6 and the lower supporting beam 8 through bolts. The hydraulic loading oil cylinder 7 supports the upper supporting beam 6, is connected and fastened with the lower supporting beam 8, and can drive the upper supporting beam 6 to move up and down under the action of external hydraulic power, so that the upper clamping device 1 can be lifted. The well mouth self-sealing rotary adjusting flange 3 is connected and fastened with the lower supporting beam 8 in a rotating way. The self-sealing rubber core 3-1 is not arranged inside the well head self-sealing rotary adjusting flange 3, the supporting legs 9 support the whole device, and the supporting legs are provided with adjusting holes and can adjust the length of the supporting legs according to the height of the well head.

When the phenomenon of upward jacking of the pipe string does not occur during operation, the opening clamping device is standby on site, and the pipe string is pulled down to carry out conventional operation by using wellhead equipment as shown in figure 2. When the pipe column is jacked up by the pressure in the well during construction, the integral device is arranged on the well mouth from the side surface of the pipe column through the opening parts of the upper clamping device 1, the lower clamping device 2, the well mouth self-sealing rotary adjusting flange 3, the upper supporting beam 6 and the lower supporting beam 8. The lower clamping device 2 is connected with the lower supporting beam 8 through a long bolt, the well mouth self-sealing rotary adjusting flange 3 and the half-full-sealing blowout preventer 4 are connected and fastened in a rotating mode, the self-sealing rubber core 3-1 two half structures are respectively installed into the well mouth self-sealing rotary adjusting flange 3 from two sides of the pipe column and are seated on the inner step surface of the self-sealing rubber core, bottom hole pressure acts on the outer surface of the rubber core, and the outer surface of the self-sealing rubber core is extruded to seal the lower pipe column. The well mouth self-sealing rotary adjusting flange 3 is used for facilitating the connection operation of the same half and full-sealing blowout preventer 4.

When the pipe column is lifted, the hydraulic loading oil cylinder 7 is located at the lowest point, the lower clamping device 2 is opened, the pipe column is clamped by the upper clamping device 1, the pipe column is lifted under the driving of the hydraulic loading oil cylinder 7, and when the hydraulic loading oil cylinder 7 runs to the maximum stroke, the upper clamping device 1 is opened after the pipe column is clamped by the lower clamping device 2. The upper clamping device 1 is driven by the hydraulic loading oil cylinder 7 to run to the lowest point, after the pipe column is clamped again, the lower clamping device 2 is opened, and the pipe column is lifted to the maximum stroke by the hydraulic loading oil cylinder 7. The above steps are repeated until the pipe string coupling exposes out of the upper surface of the lower clamping device 2. At the moment, the lower clamping device 2 is used for clamping the tubular column, the upper clamping device 1 is opened and then is buckled, and the disassembled tubular column is hung down and then is continuously repeated to carry out tubular column lifting operation.

When the pipe column is lowered, the hydraulic loading oil cylinder 7 is located at the maximum stroke position, the upper clamping device 1 is opened, the pipe column is clamped by the lower clamping device 2, and the upper buckling operation is carried out. After the upper buckle is finished, the lower clamping device 2 is opened, the upper clamping device 1 is used for clamping the tubular column, the tubular column is placed under the driving of the hydraulic loading oil cylinder 7, and when the hydraulic loading oil cylinder 7 runs to the lowest point, the upper clamping device 1 is opened after the lower clamping device 2 is used for clamping the tubular column. The upper clamping device 1 is driven by the hydraulic loading cylinder 7 to run to the maximum stroke, the lower clamping device 2 is opened after the pipe column is clamped again, and the pipe column is lowered to the lowest point by the hydraulic loading cylinder 7. This is repeated until the string collar reaches the upper surface of the lower stuck pipe 2. At the moment, the pipe column is clamped by the lower pipe clamping device 2, and the upper pipe clamping device 1 is opened and then the steps are continuously repeated to perform the pipe column lowering operation.

Example 2:

referring to fig. 1 to 7, the present invention provides a technical solution:

an open jam control device comprising:

Further, still include:

Further, the lower or upper clamping device comprises:

Further, the well head self-sealing rotary adjusting flange comprises:

Example 3:

referring to fig. 1 to 7, the present invention provides a technical solution:

an open jam control device comprising:

Further, still include:

Further, the lower or upper clamping device comprises:

Example 4:

referring to fig. 1 to 7, the present invention provides a technical solution:

an open jam control device comprising:

Further, still include:

Further, the lower or upper clamping device comprises:

Example 5:

referring to fig. 1 to 7, the present invention provides a technical solution:

an open jam control device comprising:

Further, still include:

Example 6:

referring to fig. 1 to 7, the present invention provides a technical solution:

an open jam control device comprising:

Further, still include:

Although fig. 1 to 7 are used in all the above embodiments, it is obvious to those skilled in the art that separate drawings are not shown as long as the parts or structural features missing in the embodiments are removed from the drawings. As will be clear to the skilled person. Of course, the embodiments with more components are only the best embodiments, and the embodiments with less components are the basic embodiments, but the basic objects of the invention can also be achieved, so all of them are within the protection scope of the invention.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An open-ended clamp control device, comprising:

2. The open-ended clamp control apparatus of claim 1, further comprising:

3. An open-ended clamp control apparatus as claimed in claim 2, further comprising:

4. An open ended clamp control device according to claim 1, 2 or 3, wherein said lower or upper clamp device comprises:

5. The opening clamping control device as claimed in claim 4, wherein the upper support beam is provided with an upper central hole, the opening of the upper support beam is communicated with the upper central hole, and the lower port of the clamping shell of the upper clamping device is connected with the upper support beam through a flange; and two ends of the upper supporting beam are respectively hinged with a hydraulic loading oil cylinder.

6. The opening clamping control device as claimed in claim 4, wherein the lower supporting beam is provided with a lower central hole, the opening of the lower supporting beam is communicated with the lower central hole, and the lower port of the clamping shell of the lower clamping device is connected with the upper supporting beam through a flange; the lower supporting beam is provided with a hydraulic loading cylinder connecting hole for fixing the lower end of the hydraulic loading cylinder; the lower supporting beam is provided with a supporting leg connecting hole for fixing the supporting leg.

7. An open-clamp control device according to claim 1, 2 or 3, wherein the wellhead self-sealing rotation adjusting flange comprises:

8. The open-ended clamp control device of claim 7, wherein said self-sealing rubber core comprises:

9. A control method of an opening clamping control device is characterized by comprising the following steps:

10. The control method of the opening clamping control device according to claim 9, wherein when the pipe string is lowered, the hydraulic loading cylinder is located at the maximum stroke, the upper clamping device is opened, and the lower clamping device is used for clamping the pipe string to perform the upper buckling operation; after the upper buckling is finished, the lower clamping device is opened, the pipe column is clamped by the upper clamping device, the pipe column is lowered under the driving of the hydraulic loading oil cylinder, and when the hydraulic loading oil cylinder runs to the lowest point, the upper clamping device is opened after the pipe column is clamped by the lower clamping device; the upper clamping device is driven by the hydraulic loading cylinder to run to the maximum stroke, the lower clamping device is opened after the pipe column is clamped again, and the pipe column is lowered to the lowest point by the hydraulic loading cylinder. Repeating the steps until the pipe column coupling reaches the upper surface of the pipe descending clamping device; and at the moment, the pipe column is clamped by the lower pipe clamping device, and the upper pipe clamping device is opened and then the steps are continuously repeated to perform the pipe column lowering operation.