CN105649568A - Hydraulic wellhead hanger and self-spraying rotary machine integrated assembly - Google Patents

Abstract

The invention relates to the technical field of an integrated device for converting a self-injection machine into a self-injection machine, in particular to a hydraulic releasing wellhead hanger and an integrated assembly for converting the self-injection machine into the self-injection machine; the pressure-holding cavity is arranged between the inner side of the pressure-holding sleeve and the outer side of the inner cylinder, and a pressure-transmitting hole communicated with the pressure-holding cavity is arranged on the side wall of the inner cylinder corresponding to the position of the pressure-holding cavity; the outer side of the pressure building sleeve is sleeved with a suspension claw sleeve which can move upwards along with the pressure building sleeve, the lower part of the suspension claw sleeve is separated into at least two claw flaps through longitudinal grooves distributed along the circumference, and the lower end of each claw flap is fixed with a claw. The latter comprises a specially-made oil pipe nipple and a hydraulic releasing wellhead hanger. The invention is suitable for the self-jet-to-machine production operation in the drilling and completion construction operation of a vertical well or a special well, thereby replacing the construction process of adopting a modified blowout preventer or a special blowout preventer in the prior art, eliminating the potential safety hazard caused by the construction process, greatly reducing the oil extraction cost and improving the working efficiency. [ b ]

Description

Hydraulic wellhead hanger and self-spraying rotary machine integrated assembly

technical field

The invention relates to the technical field of an integrated device for self-spraying, turning, machine and mining, and is an integrated assembly of a hydraulic wellhead hanger and a self-spraying, turning, machine and mining.

Background technique

After the drilling and completion of vertical wells or special wells, in order to save costs, the workover equipment is no longer used to lower the sucker rod pump in the later stage. The usual practice is to lower the rod pump to the predetermined position when the drilling rig equipment is installed with the Christmas tree. . This construction process requires an integrated device for self-spraying and mechanical oil recovery, which can be used in conjunction with the inner wall of special oil pipe joints. After the end of self-spraying, it will not affect the later construction operations such as mechanical oil recovery. The conventional method is to hang the rod-type oil well pump after refitting the blowout preventer or a special blowout preventer. This method will have a great safety hazard when the oil and gas are discharged. Similarly, the special blowout preventer will increase the cost. Therefore, The conventional suspension method has great potential safety hazards or the problem of making special blowout preventers at high cost.

Contents of the invention

The invention provides a hydraulic hand-free wellhead hanger and an integrated assembly of self-spraying, machine-mining and mining, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem existing in the existing self-spraying, turning, machine-mining integrated device by adopting modified blowout prevention The production cost of the blowout preventer or the special blowout preventer is high, and the construction efficiency is low, which leads to an increase in the cost of oil production, and there are problems of potential safety hazards.

One of the technical solutions of the present invention is achieved through the following measures: a hydraulic drop-in wellhead hanger, including an inner cylinder, a shear pin, a pressure-suppressing sleeve, a limiting part, a suspension claw sleeve, a lower joint and an outer cylinder , the outside of the middle part of the inner cylinder is fixed with a pressure-suppressing sleeve through shear pins, a pressure-suppressing chamber is provided between the inner side of the pressure-suppressing sleeve and the outer side of the inner cylinder, and the side wall of the inner cylinder corresponding to the position of the pressure-suppressing chamber is provided There is a pressure transmission hole communicating with the pressure chamber, and a limiting part that can limit the downward movement of the pressure sleeve is provided on the outside of the inner cylinder; a hanging claw sleeve that can go up together with the pressure sleeve is set on the outside of the pressure sleeve The lower part of the hanging claw sleeve is separated by longitudinal grooves distributed along the circumference to form at least two claws, and the lower end of each claw is fixed with claws; the outer side of the lower part of the inner cylinder is fixedly installed with the upper inner side of the lower joint, corresponding to the inner The inner hole of the lower joint below the barrel forms a pressure-suppressing channel that can set the pressure-suppressing ball. The upper end of the lower joint is provided with an outer ring groove that can limit the inner side of the claws to prevent the claws from shrinking inward. The lower part is in the shape of outward expansion; the upper outer side of the inner cylinder is fixedly installed with an outer cylinder that can shrink the lower part of the claw flap and limit the displacement of the pressure-suppressing sleeve during the upward process of the hanging claw sleeve; the upper inner side of the outer cylinder is equipped with an inner thread, and the lower outer side of the lower joint is provided with external threads.

Below is the further optimization or/and improvement to above-mentioned technical scheme of the invention:

The above-mentioned inner ring platform can be provided on the inner side of the middle part of the pressure-suppressing sleeve, and a shear pin can be cut through the pressure-suppressing sleeve under the action of high-pressure fluid and can The upper frame seal ring that pushes the pressure-suppressing sleeve upward, and the outer side of the inner cylinder corresponding to the position below the inner ring platform is provided with a limit part that is set on the inner side of the lower part of the pressure-suppressing sleeve, corresponding to the position between the inner ring platform and the limit part A lower skeleton sealing ring is arranged between the inner cylinder and the pressure-suppressing sleeve; a pressure-suppressing cavity is formed between the inner cylinder and the pressure-suppressing sleeve corresponding to the position between the upper skeleton sealing ring and the lower skeleton sealing ring.

The above-mentioned pressure-suppressing sleeve may include a fixed cylinder and a connecting cylinder. The outer middle of the inner cylinder is sequentially fitted with the fixed cylinder and the connecting cylinder from top to bottom. The fixed cylinder is fixedly installed with the inner cylinder through shear pins. The inner side of the upper end of the connecting cylinder is fixedly installed together, and an inner ring platform is provided in the middle of the connecting cylinder. There is a distance between the inner wall of the inner ring platform and the outer wall of the inner cylinder, corresponding to the position between the bottom of the fixed cylinder and the top of the inner ring platform. There is an upper skeleton sealing ring between the inner cylinder and the connecting cylinder, and a pressure chamber is formed between the inner cylinder and the connecting cylinder corresponding to the position between the upper skeleton sealing ring and the lower skeleton sealing ring; the outer middle part of the fixed cylinder is provided with an outer clamping platform The upper inner side of the hanging claw sleeve corresponding to the upper position of the outer card platform is provided with an inner ring card platform seated on the outer card platform.

The above-mentioned fixed cylinder may include a backstop ring and a nail barrel. The outside of the middle of the inner tube is fitted with a backstop ring and a nail barrel sequentially from top to bottom. The centering ring platform, which plays a guiding role, is provided with an outer clamping platform outside the lower part of the anti-retraction ring; the upper part of the nail barrel is set on the inner side of the lower part of the anti-retraction ring, and the outer side of the shear nail barrel corresponding to the position below the anti-retraction ring is provided with a support platform, the bottom surface of the anti-retraction ring is seated on the support platform and the anti-retraction ring is fixedly installed with the shearing nail barrel, and the shearing nail barrel and the inner cylinder are fixed and installed together by shearing pins; the outer side of the lower end of the shearing nail barrel is connected to the The inner sides of the upper ends are fixedly installed together.

The above-mentioned limiting components may include a limiting cylinder and a limiting ring, and the outer side of the inner cylinder corresponding to the position below the lower skeleton sealing ring is fitted with the limiting cylinder and the limiting ring in sequence from top to bottom, and the upper end of the limiting cylinder is against the bottom of the lower skeleton sealing ring At the lower end, the lower end of the limiting cylinder is against the top of the limiting ring, and the outer side of the inner cylinder corresponding to the position of the limiting ring is provided with an external groove that enables the limiting ring to be embedded. The bottom surface projection of the limiting ring is C-shaped, corresponding to the limiting ring. The outer side of the inner cylinder at the opening position of the position ring is fixed with anti-rotation nails; the inner side of the upper end of the lower joint is set on the outer side of the lower end of the limit tube, and the inner wall of the lower joint corresponding to the position of the limit ring presses the limit ring into the outer embedded groove ; The upper inner side of the lower joint corresponding to the position below the externally embedded groove and the lower outer side of the inner cylinder are fixedly installed together through threaded connection, and a universal sealing ring is provided between the outer side of the inner cylinder corresponding to the lower position of the threaded connection and the inner side of the lower joint. The inner side of the lower joint corresponding to the lower position of the inner cylinder is provided with a pressure-bearing ring platform whose top surface is against the bottom surface of the inner cylinder. The inner hole of the pressure-bearing ring platform forms a pressure-suppressing channel, which includes large-diameter section, variable diameter section and small diameter section, and the variable diameter section is in the shape of an inverted frustum.

The lower part of the above-mentioned outer cylinder can be set on the outside of the hanging claw sleeve, the lower end surface of the claw flap is located below the outer cylinder, and there is a distance between the lower end surface of the claw flap and the lower end surface of the outer cylinder, corresponding to the outer surface above the pressure-suppressing sleeve. The inner side of the upper part of the cylinder is provided with an installation ring platform, and the inner side of the installation ring platform and the upper outer side of the inner cylinder are fixed and installed together by threads.

The upper inner side of the above-mentioned installation ring platform corresponding to the position above the inner cylinder can be provided with a capping ring platform, the top surface of the inner cylinder is against the bottom surface of the capping ring platform, and the inner cylinder and the outer cylinder corresponding to the position below the capping ring platform are provided. Universal seal.

Pressure relief holes can be distributed along the circumference on the side wall of the outer cylinder, and an overflow passage can be provided on the upper part of the lower joint to communicate with the inner cavity of the claw sleeve and the outer side of the lower joint.

The angle at the bottom of the outer ring groove can be an obtuse angle, and the inner and lower angles of the minions match the angle at the bottom of the outer ring groove. Inclined above.

The second technical solution of the present invention is achieved by the following measures: an integrated assembly of self-spraying, turning and mining using the above-mentioned hydraulic hand-off wellhead hanger, including a special tubing nipple and a special tubing nipple that can be released by holding pressure The hydraulic drop-off wellhead hanger with the limit between them, the inner wall of the special tubing nipple corresponding to the location of the claws of the hydraulic drop-off wellhead hanger is provided with an embedded groove or an embedded ring groove, and the claws are embedded in the embedded groove Or embedded in the ring groove.

Below is the further optimization or/and improvement to above-mentioned technical scheme of the invention:

The top surfaces of the above-mentioned embedded grooves or embedded ring grooves can be inclined to match the top surfaces of the corresponding minions.

The outside of the lower end of the above-mentioned special oil pipe nipple can be fixed with an oil pipe collar.

The invention has a reasonable and compact structure and is easy to use. Through the cooperation of the pressure-suppressing sleeve and the suspension claw sleeve, it can not only make it hang smoothly, but also quickly release the suspension. It has high stability and strong practicability, and is especially suitable for vertical wells or The self-spraying and mechanical mining operation in the drilling and completion of special wells can replace the construction process of using modified blowout preventers or special blowout preventers in the prior art, thereby eliminating the hidden safety hazards caused by it, and can also Significantly reduce oil recovery costs and improve work efficiency.

Description of drawings

Accompanying drawing 1 is the front view semi-sectional structural schematic diagram of Embodiment 1 of the present invention.

Accompanying drawing 2 is the partial enlarged structural diagram of drawing 1 at A.

Accompanying drawing 3 is the front view semi-sectional structural schematic diagram of the second embodiment of the present invention.

The codes in the accompanying drawings are: 1 is the inner cylinder, 2 is the shear pin, 3 is the hanging claw sleeve, 4 is the lower joint, 5 is the outer cylinder, 6 is the pressure chamber, 7 is the pressure transmission hole, 8 is the claw 9 is minions, 10 is pressure holding channel, 11 is internal thread, 12 is external thread, 13 is inner ring platform, 14 is upper frame sealing ring, 15 is lower frame sealing ring, 16 is installation ring platform, 17 is Capping ring platform, 18 is a universal sealing ring, 19 is a connecting pin, 20 is a connecting cylinder, 21 is an outer clamping platform, 22 is an inner ring clamping platform, 23 is a stop ring, 24 is a shear nail cylinder, 25 is a righting ring platform, 26 is a support platform, 27 is a limit cylinder, 28 is a limit ring, 29 is a pressure ring platform, 30 is a pressure relief hole, 31 is an overflow channel, 32 is a special oil pipe nipple, 33 is an embedded ring groove, The 34 is the oil pipe coupling, the 35 is the ball for holding back the pressure, and the 36 is the ring groove for retreating.

detailed description

The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

In the present invention, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout of Figure 1 of the specification, such as: the positional relationship of front, rear, top, bottom, left, right, etc. It is determined according to the layout direction of the drawings in the description.

Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

Embodiment 1: As shown in Figures 1, 2, and 3, the hydraulic drop-off wellhead hanger includes an inner cylinder 1, a shear pin 2, a pressure-suppressing sleeve, a limiting member, a suspension claw sleeve 3, a lower joint 4 and The outer cylinder 5 and the outer middle part of the inner cylinder 1 are fixed with a pressure-suppressing sleeve through the shear pin 2, and a pressure-suppression chamber 6 is provided between the inner side of the pressure-suppression sleeve and the outer side of the inner cylinder 1, corresponding to the position of the pressure-suppression chamber 6 The side wall of the inner cylinder 1 is provided with a pressure transmission hole 7 communicating with the pressure chamber 6, and the outer side of the inner cylinder 1 is provided with a limiting part that can limit the downward movement of the pressure sleeve; Suspension claws 3 that can go up together with the pressure-suppressing sleeve. The lower part of the suspension claws 3 is separated by longitudinal grooves distributed along the circumference to form at least two claws 8, and the lower end of each claw 8 is fixed with claws 9; The outer side of the lower part of the cylinder 1 and the inner side of the upper part of the lower joint 4 are fixedly installed together, and the inner hole of the lower joint 4 corresponding to the position below the inner cylinder 1 forms a pressure-suppressing channel 10 for setting the pressure-suppressing ball 35 , and the upper end of the lower joint 4 The outside is provided with an outer ring groove that can limit the inner side of the claws 9 to prevent the claws 9 from shrinking inwardly, and the bottom of each claw 8 is outwardly expanded; 3. Shrink the outer cylinder 5 at the lower part of the claw flap 8 and limit the displacement of the pressure-suppressing sleeve during the upward movement; the upper inner side of the outer cylinder 5 is provided with an internal thread 11, and the lower outer side of the lower joint 4 is provided with an external thread 12. According to requirements, the limiting component can be integrated with the inner cylinder 1 or fixedly installed outside the inner cylinder 1 . During use, this embodiment can be connected into the preset pipe string and lowered into the well, so that each minion 9 can be suspended in the corresponding sleeve through external embedding, and can be put into the hold when the pipe string needs to be lifted up. The pressure ball 35 and the pressure holding ball 35 will go down in the pipe string to be set on the pressure holding channel 10. At this time, the high pressure fluid can be poured into the pipe string, and the high pressure fluid will go down and pass through the blocking of the pressure holding ball 35. The pressure transmission hole 7 flows into the pressure holding chamber 6, and the pressure of the high-pressure fluid in the holding pressure chamber 6 will gradually increase until the shear pin 2 is cut off, and then the pressure holding sleeve will be pushed upward. Press the sleeve upward, the lower part of the claw 8 will shrink inward under the action of the outer cylinder 5, and the claw 9 will release the limit of the outer ring groove and the external suspension with the sleeve during the upward process, so that the The pipe strings connected in this embodiment are lifted up smoothly; this embodiment is simple in structure and easy to use. Using this embodiment to carry out the suspension operation can not only make it hang smoothly, but also quickly release the suspension, with high stability and strong practicability, especially It is suitable for the drilling and completion of vertical wells or special wells, which can replace the construction technology of modified blowout preventers or special blowout preventers in the prior art, thereby eliminating the safety hazards caused by it. It can also greatly reduce the cost of oil recovery and improve work efficiency.

According to the actual needs, the above-mentioned hydraulic drop wellhead hanger can be further optimized or/and improved:

As shown in Figures 1, 2, and 3, an inner ring platform 13 is provided on the inner side of the middle of the pressure-suppressing sleeve, and a high-pressure fluid can be installed between the inner cylinder 1 corresponding to the position above the inner ring platform 13 and the pressure-suppressing sleeve. Under the action of holding pressure, the shear pin 2 is cut off and the upper skeleton sealing ring 14 that can push the pressure holding sleeve upward, and the outer side of the inner cylinder 1 corresponding to the position below the inner ring platform 13 is provided with the upper part set on the inner side of the lower part of the holding pressure sleeve. The limit part, corresponding to the position between the inner ring platform 13 and the limit part, is provided with the lower frame seal ring 15 between the inner cylinder 1 and the pressure-suppressing sleeve; corresponding to the position between the upper frame seal ring 14 and the lower frame seal ring 15 A pressure-suppressing chamber 6 is formed between the inner cylinder 1 and the pressure-suppressing sleeve. During use, the lower skeleton sealing ring 15 will keep its original position under the force of the limiting parts. The pin 2 will be cut off instantly, and the upper skeleton sealing ring 14 will push the pressure-suppressing sleeve upward under the action of the high-pressure fluid. According to requirements, both the upper skeleton sealing ring 14 and the lower skeleton sealing ring 15 are skeleton sealing rings.

As shown in Figures 1, 2, and 3, the pressure-suppressing sleeve includes a fixed cylinder and a connecting cylinder 20, and the outside of the middle part of the inner cylinder 1 is sequentially fitted with the fixed cylinder and the connecting cylinder 20 from top to bottom. The fixed cylinder is connected with the shear pin 2 Inner cylinder 1 is fixedly installed together, and the outer side of the lower end of the fixed cylinder is fixedly installed together with the inner side of the upper end of the connecting cylinder 20. An inner ring platform 13 is arranged in the middle of the connecting cylinder 20, and the inner wall of the inner ring platform 13 is connected with the inner cylinder 1. There is a distance between the outer walls, and an upper skeleton sealing ring 14 is provided between the inner cylinder 1 and the connecting cylinder 20 corresponding to the position between the bottom of the fixed cylinder and the top of the inner ring platform 13, corresponding to the upper skeleton sealing ring 14 and the lower skeleton sealing ring 15. A pressure chamber 6 is formed between the inner cylinder 1 and the connecting cylinder 20 at the middle position; an outer clamping platform 21 is provided on the outside of the middle part of the fixed cylinder, and a seat on the inner side of the upper end of the hanging claw sleeve 3 corresponding to the position above the outer clamping platform 21 is provided. The inner ring card platform 22 on the card platform 21. This can make its processing and installation more convenient and labor-saving. According to requirements, the outer card platform 21 can be an annular platform, or can be a boss distributed on the outside of the fixed cylinder.

As shown in accompanying drawings 1, 2, and 3, the fixing cylinder includes a backstop ring 23 and a nail barrel 24, and the outside of the middle part of the inner tube 1 is sequentially fitted with a backstop ring 23 and a nail barrel 24 from top to bottom, and the backstop ring 23 The inner side of the upper end of the inner cylinder 1 is set on the outer side of the inner cylinder 1 and can play a guiding role in the upward process. On the inner side of the bottom of the retreat ring 23, a support platform 26 is provided on the outside of the nail barrel 24 corresponding to the position below the retreat stop ring 23. The bottom surface of the retreat stop ring 23 is seated on the support platform 26 and the backstop ring 23 and the shear nail barrel 24 are fixedly installed. Together, the nail barrel 24 and the inner barrel 1 are fixedly installed together through the shear pin 2; According to requirements, the nail barrel 24 can be located at the position of the support platform 26, and at this time, the support platform 26 can strengthen the joint of the nail barrel 24; There can be a gap fit between them, so that the two can maintain a good coaxiality while moving smoothly with each other, thereby playing a guiding role and ensuring the smooth release of the suspension; the support platform 26 can be a ring platform, or can be distributed on The boss on the outside of the fixed cylinder can support the backstop ring 23; the backstop ring 23 and the support platform 26 can be fixedly installed together through the connecting pin 19, and can also be fixedly installed together by threaded connection, which cooperates with the support Platform 26 all can strengthen the stability of connection, can not easily be affected by external force and cause connection failure; Fixed cylinder can be integrated, also can be split type, adopt split type to make its processing and installation more convenient and labor-saving; Backstop ring 23 also It can be a C-shaped ring, and the corresponding centralizing ring platform 25 is also a C-shaped ring that matches it. The anti-retraction ring 23 is stretched and set on the outer side of the inner cylinder 1, and a There is a backstop ring groove 36 that can make the centralizing ring platform 25 embed when the backstop ring 23 goes up, wherein when the backstop ring 23 goes up until the centralizing ring platform 25 is located at the backstop ring groove 36, the backstop ring that is stretched 23 will shrink and reset, so that the centralizing ring platform 25 is snapped in the back-stop ring groove 36, and the distance between the back-stop ring groove 36 and the righting ring platform 25 will form the upward displacement of the pressure-suppressing sleeve.

As shown in Figures 1, 2, and 3, the limiting components include a limiting cylinder 27 and a limiting ring 28, and the outer side of the inner cylinder 1 corresponding to the position below the lower skeleton sealing ring 15 is sequentially fitted with the limiting cylinder 27 and the limiting ring 28 from top to bottom. position ring 28, the upper end of the limit tube 27 is against the lower end of the lower skeleton seal ring 15, the lower end of the limit tube 27 is against the top of the limit ring 28, and the outer side of the inner tube 1 corresponding to the position of the limit ring 28 is provided with a limiter. The outer embedded groove of the position ring 28, the projection of the bottom surface of the limit ring 28 is C-shaped, and the outer side of the inner cylinder 1 corresponding to the opening position of the limit ring 28 is fixedly installed with anti-rotation nails; the inner side of the upper end of the lower joint 4 is set on the limit On the outer side of the lower end of the cylinder 27, the inner wall of the lower joint 4 corresponding to the position of the limit ring 28 presses the limit ring 28 into the outer embedded groove; The outer sides of the lower part are fixedly installed together by threaded connection, a universal sealing ring 18 is provided between the outer side of the inner cylinder 1 corresponding to the position below the threaded connection and the inner side of the lower joint 4, and the inner side of the lower joint 4 corresponding to the lower position of the inner cylinder 1 is provided with a top surface The pressure-bearing ring platform 29 on the bottom surface of the inner cylinder 1, the inner hole of the pressure-bearing ring platform 29 forms a pressure-suppressing channel 10, and the pressure-suppressing channel 10 includes a large-diameter section, a variable-diameter section and a small-diameter section distributed from top to bottom , and the variable diameter section is in the shape of an inverted frustum. Through the design of the lower joint 4, a good seal can be formed between the inner cylinder 1 and the lower joint 4, and the pressure holding channel 10 can guide the pressure holding ball 35 to be successfully set. According to requirements, the limiting part can be integrated. When it is integrated, the limiting part can be a cylindrical shape that is set on the outside of the inner cylinder 1 or fixed on the outside of the inner cylinder 1, or can be fixed on the outside of the inner cylinder 1. The fixed block; the limit part can also be split, and the split can make its processing and installation more convenient and labor-saving.

As shown in accompanying drawings 1, 2, and 3, the lower part of the outer cylinder 5 is set on the outside of the hanging claw sleeve 3, the lower end surface of the claw petal 8 is located below the outer cylinder 5, and the lower end surface of the claw petal 8 is in contact with the lower surface of the outer cylinder 5. There is a distance between the end faces, and the upper inner side of the outer cylinder 5 corresponding to the position above the pressure-suppressing sleeve is provided with a mounting ring platform 16, and the inner side of the mounting ring platform 16 is fixedly installed together with the upper outer side of the inner cylinder 1 by threads. During use, the pressure-suppressing sleeve will move upwards under the action of high-pressure fluid until the top surface of the pressure-suppressing sleeve touches the bottom surface of the installation ring platform 16. At this time, the suspension between each minion 9 and the sleeve can be released. , to ensure that the connecting pipe string of this embodiment can be lifted up smoothly. According to requirements, when no anti-retraction ring groove 36 is added outside the inner cylinder 1, the bottom surface of the installation ring platform 16 will form a limit for the upward movement of the pressure-suppressing sleeve. The distance between the bottom surfaces will form the upward displacement of the pressure-suppressing sleeve.

As shown in accompanying drawings 1, 2, and 3, a capping ring platform 17 is provided on the inner side of the upper part of the installation ring platform 16 corresponding to the position above the inner cylinder 1, and the top surface of the inner cylinder 1 is against the bottom surface of the capping ring platform 17, corresponding to the cap A universal sealing ring 18 is provided between the inner cylinder 1 and the outer cylinder 5 below the ring platform 17 . This allows the two to have a good seal while maintaining a solid connection.

As shown in Figures 1, 2, and 3, pressure relief holes 30 are distributed along the circumference on the side wall of the outer cylinder 5, and an overflow channel 31 that can communicate with the inner cavity of the claw sleeve and the outside of the lower joint 4 is provided on the upper part of the lower joint 4. . This can ensure that the suspension claw cover 3 can go up smoothly under the action of the pressure-suppressing sleeve to prevent the jamming phenomenon from occurring.

As shown in Figures 1, 2, and 3, the angle at the bottom of the outer ring groove is an obtuse angle, the inner and lower angles of the minions 9 match the angle at the bottom of the outer ring groove, and the outer upper top surface of the minions 9 faces outward and downward. Inclined shape, the outer lower bottom surface of minions 9 is inclined outwards and upwards. According to requirements, the outer diameter of the following joint 4 is the dividing line, the part of the minion 9 whose bottom surface projection is within the dividing line is called the minion 9 inside, and the part of the minion 9 whose bottom surface projection is outside the dividing line is called the minion 9 outside. Can be convenient to the limit suspension of minion 9 like this and release suspension.

Embodiment 2: As shown in Figures 2 and 3, an integrated assembly of self-spraying, turning, and mining using the above-mentioned hydraulic drop-in wellhead hanger, including a special tubing nipple 32 and a special tubing nipple 32 that can be released by holding pressure The hydraulic drop-in wellhead hanger between the limit, corresponding to the position of the minion 9 of the hydraulic drop-out wellhead hanger, is provided with an embedded groove or an embedded ring groove 33 on the inner wall of the special tubing nipple 9, and the minion 9 is embedded in the In the embedded groove or the embedded ring groove 33. Wherein, the special tubing nipple 32 refers to a tubing nipple that is provided with an embedded groove or an embedded ring groove 33 at a corresponding position on the inner wall; Connect together, connect the lower end of the special tubing nipple 32 with the universal tubing nipple, connect the upper part of the outer cylinder 5 with the polished rod barrel, and connect the lower part of the lower joint 4 with the sucker rod to be extracted , so that it can be self-spraying when the hydraulic wellhead hanger is suspended and the special tubing nipple 32 is in place, and when it is necessary to turn the machine to recover, it can be suspended by throwing the pressure ball 35 to contact the suspension, so that the oil to be extracted can be extracted. The rod is raised upwards, and the mechanical recovery is performed by connecting the corresponding equipment; the whole process is simple to operate and easy to use, which can improve the safety factor of the operation, greatly reduce the cost of oil production, and improve work efficiency.

According to actual needs, the above-mentioned integrated components of self-spraying machine can be further optimized or/and improved:

As shown in Figures 2 and 3 , the top surfaces of the embedded grooves or the embedded ring grooves 33 are inclined to match the top surfaces of the corresponding minions 9 . This makes it easier to unsuspend.

As shown in accompanying drawings 2 and 3 , an oil pipe collar 34 is fixed outside the lower end of the special oil pipe nipple 32 . This can make it more convenient and quick to connect with the short joint of the oil pipe.

The above technical features constitute the embodiment of the present invention, which has strong adaptability and implementation effect, and non-essential technical features can be added or subtracted according to actual needs to meet the needs of different situations.

Claims (10)

1. a hydraulic releasing well mouth hanger, it is characterized in that including inner core, shear pin, the sleeve that builds the pressure, limiting component, suspension pawl set, lower contact and urceolus, it is installed with, by shear pin, the sleeve that builds the pressure outside the middle part of inner core, build the pressure and be provided with, between inner side and the outside of inner core of sleeve, the chamber that builds the pressure, the build the pressure sidewall of inner core of position, chamber of correspondence is provided with the pressure transmission hole communicated with the chamber that builds the pressure, and side is provided with and can limit the limiting component that the sleeve that builds the pressure is descending outer tube; Outer sheath at the sleeve that builds the pressure is separated to form at least two Piece Claw lobes equipped with the bottom that with the up suspension pawl set of the sleeve that builds the pressure, can hang pawl set by circumferential cannelure, and the lower end of every Piece Claw lobe is respectively and fixedly provided with cat's paw; The lower outside of inner core and the upper inner of lower contact are fixedly installed togather, the endoporus of the lower contact of corresponding inner core lower position forms the passage that builds the pressure that the ball that can make to build the pressure sets, the upper end of lower contact be provided externally with can inside spacing cat's paw with preventing claw tooth to the outer groove of contract, and the bottom of each pawl lobe is all in outwards expanding shape; The upper outside of inner core is installed with can shrink pawl lobe bottom in hanging the process that pawl set is up and can limit the urceolus of the sleeve displacement that builds the pressure; The upper inner of urceolus is provided with female thread, and the lower outside of lower contact is provided with external screw thread.

2. hydraulic releasing well mouth hanger according to claim 1, it is characterized in that being provided with interior land at the inside middle portion of the sleeve that builds the pressure, in corresponding, be provided with between sleeve can by building the pressure the upper skeleton sealing ring cutting off shear pin and the sleeve that builds the pressure can be promoted up under the effect of high-pressure fluid for the inner core and building the pressure of land top position, it is provided with top in corresponding outside the inner core of land lower position and is sleeved on the limiting component inside the lower cartridge that builds the pressure, the inner core of position and build the pressure and be provided with lower skeleton sealing ring between sleeve between land and limiting component in corresponding; The inner core of position and build the pressure and form the chamber that builds the pressure between sleeve between corresponding upper skeleton sealing ring and lower skeleton sealing ring.

3. hydraulic releasing well mouth hanger according to claim 2, the sleeve that it is characterized in that building the pressure includes fixing cylinder and connecting cylinder, in the middle part of inner core, outside is from top to bottom set with fixing cylinder and connecting cylinder successively, fixing cylinder is fixedly installed togather by shear pin and inner core, it is fixedly installed togather inside the fixing lower end outside of cylinder and the upper end of connecting cylinder, it is provided with interior land at the middle part of connecting cylinder, the inwall of interior land and and the outer wall of inner core between have spacing, it is provided with upper skeleton sealing ring between inner core and the connecting cylinder of position bottom corresponding fixing cylinder and between interior land top, form, between inner core and the connecting cylinder of position, the chamber that builds the pressure between corresponding upper skeleton sealing ring and lower skeleton sealing ring, it is provided with outer chuck outside the middle part of fixing cylinder, inside the upper end hanging pawl set of corresponding outer chuck top position, is provided with seat internal ring chuck in outer chuck.

4. hydraulic releasing well mouth hanger according to claim 3, it is characterized in that fixing cylinder includes retaining ring and shear pin cylinder, in the middle part of inner core, outside is from top to bottom set with retaining ring and shear pin cylinder successively, being provided with inside the upper end of retaining ring and be sleeved on outside inner core and the righting land playing the guiding role in up process, the lower outside at retaining ring is provided with outer chuck;The top of shear pin cylinder is sleeved on the lower inside of retaining ring, it is provided with support platform outside the shear pin cylinder of corresponding retaining ring lower position, the bottom surface seat of retaining ring is in supporting on platform and retaining ring is fixedly installed togather with shear pin cylinder, and shear pin cylinder and inner core are fixedly installed togather by shear pin; It is fixedly installed togather inside the lower end outside of shear pin cylinder and the upper end of connecting cylinder.

5. hydraulic releasing well mouth hanger according to claim 4, it is characterized in that limiting component includes position-limiting drum and spacing ring, position-limiting drum and spacing ring from top to bottom it is set with successively outside the inner core of corresponding lower skeleton sealing ring lower position, the upper end of position-limiting drum is against the lower end of lower skeleton sealing ring, the lower end of position-limiting drum is against the top of spacing ring, it is provided with, outside the inner core of corresponding spacing ring position, the outer groove that spacing ring can be made to embed, the bottom surface projection of spacing ring is C-shaped, is installed with anti-rotation nail outside the inner core of corresponding spacing ring aperture position; The upper end inner sleeve of lower contact is contained in the lower end outside of position-limiting drum, and spacing ring is pressed together in outer groove by the inwall of the lower contact of corresponding spacing ring position; The upper inner of lower contact of corresponding outer groove lower position is threaded connection with the lower outside of inner core and is fixedly installed togather, it is provided with general sealing ring between outside the inner core of corresponding threaded connection place lower position and inside lower contact, it is provided with, inside the lower contact of corresponding inner core lower position, the pressure-bearing land that end face is against on inner core bottom surface, the endoporus of pressure-bearing land forms the passage that builds the pressure, the passage that builds the pressure includes the big footpath section, reducer and the path section that are from top to bottom sequentially distributed, and reducer is back taper mesa-shaped.

6. the hydraulic releasing well mouth hanger according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that the bottom of urceolus is sleeved on suspension pawl set outside, the lower surface of pawl lobe is positioned at the lower section of urceolus, and have spacing between the lower surface of pawl lobe and the lower surface of urceolus, the build the pressure upper inner of urceolus of sleeve top position of correspondence is provided with installation land, and the upper outside of the inner side and inner core of installing land is threadably secured and is installed together.

7. hydraulic releasing well mouth hanger according to claim 6, it is characterized in that the upper inner of the installation land of corresponding inner core top position is provided with the land that binds, the end face of inner core is against on the bottom surface of the land that binds, correspondence bind land lower position inner core and urceolus between be provided with general sealing ring.

8. hydraulic releasing well mouth hanger according to claim 7, it is characterised in that circumferentially have relief hole on the sidewall of urceolus, is provided with the flow channels that can connect outside pawl set inner chamber and lower contact on the top of lower contact; Or/and, the bottom land angle of outer groove is obtuse angle, and the bottom land angle of the inner lower angle of cat's paw and outer groove matches, and the outside upper end face of cat's paw is outside inclined downward shape, and the outer bottom surface of cat's paw is outside inclined upward shape.

9. the blowing favourable turn of the hydraulic releasing well mouth hanger that a kind adopts according to any one of claim 1 to 8 adopts integral component, it is characterized in that including special tubing nipple and the spacing hydraulic releasing well mouth hanger building the pressure between releasing and special tubing nipple being passed through, the special tubing nipple inwall of the cat's paw position of corresponding hydraulic releasing well mouth hanger is provided with embedded groove or embedded annular groove, and cat's paw is embedded in embedded groove or embedded annular groove.

10. blowing according to claim 9 favourable turn adopts integral component, it is characterised in that the end face of embedded groove or embedded annular groove is all in skewed with what corresponding cat's paw's end face matched;Or/and, the lower end outside of special tubing nipple is fixed with tubing coupling.