CN212614626U

CN212614626U - Be applied to big inclination, complicated orbit well test packer

Info

Publication number: CN212614626U
Application number: CN202021002562.7U
Authority: CN
Inventors: 刘涛; 张昌朝; 刘明辉; 张迎春; 逯玉亮; 李勇; 张红
Original assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Downhole Operation Co Sinopec of Shengli Petroleum Engineering Corp
Current assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Downhole Operation Co Sinopec of Shengli Petroleum Engineering Corp
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-02-26
Anticipated expiration: 2030-06-04

Abstract

The utility model discloses a packer applied to the well test with large inclination and complex track, which comprises a mandrel and an upper joint arranged at the upper end of the mandrel, wherein a bypass mechanism, a sealing mechanism, a supporting mechanism and a transposition mechanism are arranged outside the mandrel from top to bottom in sequence; the transposition mechanism can ensure the normal transposition of the packer in a well with a complex track, and the bypass mechanism can ensure that the pressure of the packer is rapidly balanced in the processes of setting, unsetting and lifting. The packer can be widely applied to packing construction of various wells with large inclination and complex tracks and common wells, can improve the success rate of testing construction of the wells with complex tracks and realizes formation testing to obtain formation parameters.

Description

Be applied to big inclination, complicated orbit well test packer

Technical Field

The utility model relates to an during oil field stratum test, need seal oil jacket annular space's test packer, especially one kind is applied to big inclination, complicated orbit well test packer.

Background

In order to meet the requirement of urban construction, an oil field can only drill a horizontal well or a highly-inclined well from the periphery and drill to a target layer for exploration during exploration and development, so that most of wells are large in inclination and complex in track, and because the conventional test packer used in the oil field is a rotary setting, the packer cannot realize effective setting in the highly-inclined and complex-track well because the rotary torque of a pipe column cannot be transmitted to the test packer, formation test construction cannot be performed, formation parameters cannot be obtained, and data bases cannot be provided for next exploration.

Wherein, chinese patent 109372464a discloses a packer, and it relates to oil and gas development technical field, includes: the device comprises a body, a rubber cylinder mechanism, a piston shaft, a cylinder sleeve outer cylinder, a retaining piece and a fixing sleeve, wherein the body extends along the axis; the lateral wall of the body is sleeved with a rubber cylinder mechanism capable of expanding along the radial direction, a piston shaft, a cylinder sleeve outer cylinder and a fixing sleeve, a through hole is formed in the lateral wall of the body, the cylinder sleeve outer cylinder is sleeved on the piston shaft and the cylinder sleeve shaft, the through hole is located between the piston shaft and the cylinder sleeve shaft, the piston shaft is fixedly connected with the cylinder sleeve outer cylinder, a stopping part is located between the cylinder sleeve shaft and the cylinder sleeve outer cylinder, the stopping part is fixedly connected with the cylinder sleeve outer cylinder, the outer side wall of the cylinder sleeve shaft is provided with teeth with upward tooth tips, the inner side wall of the stopping part is provided with teeth with downward tooth tips, and the fixing sleeve is fixed on the. The packer can solve at least one of the problems of complex structure, high processing cost, complex operation process, poor setting reliability and the like of the existing packer.

China's special CN209129577U discloses a 7' limited non-rotating gravity setting packer, which comprises an upper righting joint, a hydraulic anchor body, a fixed splint, a hydraulic anchor inserted slip, a volume tube, a rubber sleeve mandrel, a top shoe, an end face rubber sleeve, a middle rubber sleeve, a bottom shoe, a transition sleeve, a slip sliding sleeve, an upper mandrel, a mechanical inserted slip, an open hoop, a friction block sleeve, an upper transposition mandrel, an oil chamber outer cylinder, a transposition sleeve, a floating piston, an outer cylinder, a lower transposition mandrel, a transposition lug, a sheath, a locking arm, a rupture disc outer cylinder, a connecting mandrel, a shear pin sheath, a shear nipple, a lower righting joint, a pressing plate compression screw, a hydraulic anchor slip spring, a straight spiral compression spring, a slip stop pin, a split ring fastening screw, a friction block spring, a pressing plate, a steel ball, an oil filling plug, a snap ring, a rupture disc and a shear pin. The utility model discloses can satisfy and only put and come the operation through long lifting, have the locking function before going into the pit, have the definite setting number of times, and can lock once more after arriving the setting number of times.

Chinese patent CN104863540B discloses a slip packer capable of being hydraulically set and rotationally unset, belonging to the field of downhole operation tools of oil and gas wells. The packer comprises a central pipe, an upper joint, a lower joint, a slip, a piston sleeve and a release sleeve; one end of the central tube is provided with an upper joint, and the other end of the central tube is provided with a C-shaped ring; an inner sleeve is arranged on the central pipe on one side of the upper joint; the inner sleeve is clamped with a slip upper cone and a slip lower cone through a cone release shaft and a key block A; slips are arranged between the slip upper cone and the slip lower cone. The packer has compact structure; the setting, anchoring and unsetting mechanism is designed skillfully; the setting is safe, the setting in advance can be prevented, and the step-by-step deblocking can be easily realized when a plurality of packers are used simultaneously; the problem of difficulty in multistage deblocking in the past is solved. The packer is capable of withstanding bi-directional pressure from both above and below the packer. It is especially suitable for vertical well and small slope well to perform water (gas) injection, interlayer packing, separate injection and production, multilayer test and production increasing operation.

Chinese patent CN204266980U discloses a horizontal well, large inclination deep well blocking packer for oil field exploitation, which comprises: the rubber tube sealing device comprises an upper joint, a central tube connected with the upper joint through a split locking block, and a lower joint connected with the central tube, wherein an outer central tube is arranged outside the central tube, two rubber tubes are sleeved on the outer central tube, a spacer ring is arranged between the two rubber tubes, and the upper end and the lower end of each rubber tube are respectively provided with a rubber tube retaining bowl; the lower end of the outer central tube is in threaded connection with the rubber cylinder seat, the rubber cylinder seat is locked on the central tube through a locking block, the upper end of the lock sleeve is in threaded connection with the rubber cylinder seat, the lock sleeve is sleeved on the lower joint and fixed through shear pins, and the safety piston is fixed on the lower joint through the shear pins; the upper joint is fixed with an unsealing sleeve through a pin, and the unsealing sleeve is in threaded connection with the upper vertebral body. The packer can effectively realize interlayer packing and simultaneously anchor the pipe column, and effectively prevent the packer from being impacted, blocked by mud and blocked by a casing pipe when the pipe column is put into the well, and the packer can be clamped and sealed in advance in the process of going into the well, so that the construction safety is ensured, and the accident risk is reduced.

Although the packers have the advantages of the packers, the existing packers are rotary setting seals, and the packers cannot realize effective setting seals in wells with large inclination and complex tracks because the rotary torque of a pipe column cannot be transmitted to the tested packers, so that formation test construction cannot be performed, formation parameters cannot be obtained, and data bases cannot be provided for next exploration. And some suspected setting wells are lifted and lowered, but the method is difficult to realize in the aspect of bottom layer test construction of high pressure resistant and large-inclination complex track wells.

Disclosure of Invention

The utility model aims at providing a defect to prior art exists provides one kind and is applied to big inclination, complicated orbit well test packer, overcomes the defect of current test packer, solves the unable seat problem of big inclination complicated orbit well test packer, enlarges test construction field, can realize accessible seat, and guarantee annular space's is airtight, realizes that the stratum test acquires the stratum parameter.

The technical scheme of the utility model is that: a packer applied to a well with a large inclination and a complex track for testing comprises a mandrel and an upper joint arranged at the upper end of the mandrel, wherein a bypass mechanism, a sealing mechanism, a supporting mechanism and a transposition mechanism are sequentially arranged on the outer side of the mandrel from top to bottom; wherein:

the bypass mechanism comprises an intermediate joint sleeved on the outer side of the mandrel, the outer side of the intermediate joint is in threaded connection with a pressure relief joint, a movable pressure relief channel communicated with an inner cavity of the pressure relief joint is formed between the intermediate joint and the upper joint, and a sealing device is arranged at a movable contact part of the intermediate joint and the upper joint;

the sealing mechanism comprises a rubber cylinder mandrel sleeved on the mandrel, an adjusting ring in sealing connection with external threads at the lower end of the middle joint and a rubber cylinder sleeved on the outer side of the rubber cylinder mandrel, and the upper end of the rubber cylinder mandrel is connected with internal threads at the lower end of the middle joint;

the supporting mechanism comprises a slip, a slip sliding sleeve in threaded connection with an adjusting ring and a slip core shaft in threaded connection with the slip sliding sleeve, the slip hoop is sleeved on the slip core shaft, and the slip is arranged in a slip groove formed by the slip core shaft, the slip hoop and the slip sliding sleeve; the inner wall of the slip hoop is provided with a step surface for limiting the slip mandrel, and the lower end of the slip hoop is connected with a buffer device for buffering the slip mandrel;

the transposition mechanism moves along the track groove on the mandrel and is in movable contact with the lower end of the buffer device.

Preferably, the transposition mechanism comprises a friction block sleeve sleeved outside the mandrel, a friction block spring and a friction block are installed on the friction block sleeve, the upper end and the lower end of the friction block sleeve are respectively in threaded connection with a positioning ring and a fixing ring, the lower end of the fixing ring is in threaded connection with a retaining ring, a transposition pin sleeve is installed between the friction block sleeve and the retaining ring, and a transposition pin located in the track groove is installed in the transposition pin sleeve.

Preferably, the locating ring is limited by the slotted concave end set screw with the upper end of the friction block sleeve, and the lower end of the friction block sleeve is limited by the slotted concave end set screw with the fixed ring.

Preferably, buffer includes urceolus, position sleeve, spring, stop collar and steel ball, the position sleeve cover is established at the dabber outside, the urceolus cover is established outside the position sleeve and is formed annular space with position sleeve and slips hoop, install the spring in the space, the lower extreme of spring is connected with the stop collar, the stop collar is spacing through fixing the stop screw on the urceolus, the upper end and the slips hoop of urceolus and position sleeve link together, the position sleeve lower extreme is equipped with the realization urceolus pivoted steel ball.

Preferably, the slip sliding sleeve is provided with a gradually reduced inclined surface, and slips are placed into the slip groove from the inclined surface at the lower end of the slip sliding sleeve.

Preferably, the lower end of the upper joint is provided with an inclined upper joint matching surface, the upper end of the middle joint is provided with a middle joint matching surface matched with the upper joint matching surface, and the sealing device is arranged on the middle joint matching surface.

Preferably, the sealing device is a sealing ring.

Preferably, the rubber cylinders comprise two rubber cylinders which are arranged side by side, and a spacing ring is arranged between every two adjacent rubber cylinders.

Preferably, the inner wall of the upper joint and the inner wall of the middle joint are respectively provided with a sealing ring.

Preferably, the rail groove is a zigzag groove.

Compared with the prior art, the utility model, have following advantage:

1. because the utility model discloses a new seat seals mechanism, this mechanism make the transposition round pin change the position in the track inslot through lifting and transferring to make seat seal mechanism change the position, make the slips tooth support on the casing wall, and then compress the packing element with tubular column weight, make the packing element inflation realize the sealed of packing element, so the utility model discloses can extensively be applicable to the test construction and the test cover construction of vertical shaft, big inclination, complicated orbit well.

2. The utility model has the advantages of the utility model discloses the design has great bypass pressure release passageway, and the deblocking of being convenient for, mechanical type lift down and press the seat to seal, and the transposition is reliable, easy operation, construction convenience, and the deblocking is lifted to the accessible income well tubular column when needing. The utility model discloses can improve big inclination, complicated orbit well test success rate, increase test construction scope, have obvious economic benefits.

Drawings

FIG. 1 is a schematic structural view of the upper half of the present invention;

FIG. 2 is a schematic view of the lower half structure of the present invention;

in the figure: 1. an upper joint; 2. a pressure relief fitting; 3. an intermediate joint; 4. an adjusting ring; 5. a rubber sleeve; 6. a slip sliding sleeve; 7. slips; 8. a slip sliding sleeve; 9. a slip hoop; 10. a positioning sleeve; 11. a spring; 12. a limiting sleeve; 13. an outer cylinder; 14. a positioning ring; 15. a friction block sleeve; 16. a fixing ring; 17. a transposition pin; 18. a transposition pin sleeve; 19. a baffle ring; 20. a mandrel; 21. a pressure relief channel; 22. a rubber cylinder; 23. a spacer ring; 24. a friction block; 25. a friction block spring; 27. a seal ring; 29. a steel ball; 32. limiting jackscrews; 34. and (5) screwing a tool.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example one

Fig. 1 and 2 are connected together. Referring to fig. 1 and 2, the packer applied to the testing of the well with the large inclination and the complex track comprises a mandrel 20 and an upper joint 1 arranged at the upper end of the mandrel 20, wherein a bypass mechanism, a sealing mechanism, a supporting mechanism and a transposition mechanism are sequentially arranged on the outer side of the mandrel 20 from top to bottom. Wherein:

the bypass mechanism comprises a pressure relief joint 2 and an intermediate joint 3. And sealing rings are respectively arranged on the inner wall of the upper joint 1 and the inner wall of the middle joint 3. The middle joint 3 is sleeved outside the mandrel 20, the upper part of the middle joint 3 is connected with the lower end of the pressure relief joint 2 through threads and a slotted concave end set screw, and the upper part of the pressure relief joint 2 is sleeved from the upper joint 1. A movable pressure relief channel 21 communicated with the inner cavity of the pressure relief joint 2 is formed between the middle joint 3 and the upper joint 1, and a sealing ring 27 is arranged at the movable contact part of the middle joint 3 and the upper joint 1. Through this kind of structure, after stratum test operation construction, only need to lift the tubular column and can carry out the deblocking to the packer, earlier lift bypass mechanism during the deblocking, even the top connection 1 separates with intermediate head 3 to make pressure release channel 21 open, make the oil jacket communicate, reduce inside and outside pressure differential, reduce the suction effect.

Foretell sealing mechanism is including adjusting ring 4, packing element dabber 5, packing element 22,

spacer ring

23, and 3 lower parts of intermediate head pass through threaded connection with adjusting ring 4, and 3 inner chambers of intermediate head pass through threaded connection with packing element dabber 5 to be equipped with the sealing washer, and the installation packing element 22 is established to the cover on the packing element dabber 5, and adjusting ring 4 passes through the screw thread, goes up to detain frock 34 and be connected with slips sliding sleeve 6, goes up to detain frock 34 and be hexagon socket head cap screw. After the mandrel 20 is lowered down, the adjusting ring 4 is driven to extrude the rubber cylinder 22, the rubber cylinder 22 starts to compress and expand, the rubber cylinder 22 is sealed on the inner wall of the casing, and the oil sleeve sealing effect is achieved.

The supporting mechanism comprises a slip sliding sleeve 6, slips 7, a slip core shaft 8 and a slip hoop 9. Slip sliding sleeve 6 lower extreme passes through fluting concave end holding screw connection adjustable ring 4, slips dabber 8, slips hoop 9 and slip sliding sleeve 6 form the slips groove, slip 7 is put into the slips inslot from 6 lower extreme inclined planes of slips sliding sleeve, slip hoop 9 is put into to 7 bottom ends of slips, link together with hexagon socket head cap screw between the slips hoop 9, slip sliding sleeve 6, slips 7, slip hoop 9 all settles on slips dabber 8, slip hoop 9 inner wall has the step face to carry on spacingly to slip sleeve 8, the lower extreme of slip hoop 9 is connected with buffer. The buffering device is used for buffering the slip core shaft 8, and hard collision damage is prevented. The concrete buffer device comprises an outer barrel 13, a positioning sleeve 10, a spring 11, a limiting sleeve 12 and a steel ball 29, wherein the positioning sleeve 10 is sleeved outside a mandrel 20, the outer barrel 13 is sleeved outside the positioning sleeve 10 and forms an annular space with the positioning sleeve 10 and a slip hoop 9, the spring 11 is installed in the space, the lower end of the spring 11 is connected with the limiting sleeve 12, the limiting sleeve 12 is limited by a limiting screw fixed on the outer barrel 13, the upper ends of the outer barrel 13 and the positioning sleeve 10 are connected with the slip hoop 9 through a slotted concave end set screw, and the steel ball 29 for realizing rotation of the outer barrel 13 is arranged at the lower end of the positioning sleeve 10. A positioning sleeve 10, a spring 11 and a limiting sleeve 12 are arranged between the outer cylinder 13 and the mandrel 20 for limiting, and rotation is realized through a steel ball 29. When the packer is used, the packer mandrel 20 moves downwards through lowering the pipe column, and the 6 slips 7 in the supporting mechanism are spread under the action of the slip sliding sleeve 6 and anchored with the inner wall of the casing.

The transposition mechanism comprises a friction block sleeve 15 sleeved outside the mandrel 20, a friction block spring 25 and a friction block 24 are installed on the friction block sleeve, the upper end and the lower end of the friction block sleeve 15 are respectively in threaded connection with a positioning ring 14 and a fixing ring 16, the lower end of the fixing ring 16 is in threaded connection with a retaining ring 19, a transposition pin sleeve 18 is installed between the friction block sleeve 15 and the retaining ring 19, and a transposition pin 17 located in a rail groove 35 is installed in the transposition pin sleeve 18. The track groove 35 is a groove provided on the mandrel 20, and includes a long groove and a short groove, which are connected together to form a zigzag structure. Thus the mandrel 20 is lifted up and then lowered down to index the index pin 17 in the track groove 35, thereby indexing the setting mechanism for setting. The method specifically comprises the following steps: the outer barrel 13 contacts with the positioning ring 14 firstly, then the mandrel 20 continues to move downwards, the slip sliding sleeve 6 is driven to push the slip mandrel 8 to move downwards, the slip hoop 9 and the slip mandrel 8 prevent hard collision under the buffering effect of the spring 11, and meanwhile, 6 slips 7 are pushed out of the slip groove under the inclined plane effect of the slip sliding sleeve 6, so that the slips 7 are anchored with the inner wall of the casing.

When the tool is used, the tool is put into a well along with a testing tool and an oil pipe after being assembled, the tool is lifted to a certain height at a well mouth according to the depth after reaching a designed position, the transposition mechanism is changed into a long groove from a short groove, then the pipe string is put down, the packer mandrel 20 moves down, the mandrel 20 can extend out for a longer length, at the moment, the outer cylinder 13 in the supporting mechanism is firstly contacted with the positioning ring 14, then the mandrel 20 moves down continuously, the slip sliding sleeve 6 is driven to drive the slip mandrel 8 to move downwards, the slip hoop 9 and the slip mandrel 8 prevent rigid collision under the buffering action of the spring 11, simultaneously, 6 slips 7 are pushed out of the slip groove under the inclined plane action of the slip sliding sleeve 6, the slips 7 are anchored with the inner wall of the casing, the body stops moving, at the moment, the upper joint 1 is in sealing contact with the movable contact part of the middle joint 3, so that the pressure relief channel 21 is closed, the mandrel 20, meanwhile, the sealing sleeve is sealed on the inner wall of the sleeve, so that the sealing effect of the oil sleeve is realized, and the conventional formation testing operation construction can be carried out at the moment. After the construction is finished, the packer can be unset only by lifting the pipe column, the bypass mechanism is firstly lifted during unset, namely the upper joint 1 is separated from the middle joint 3, so that the pressure relief channel 21 is opened, the oil sleeve is communicated, the internal and external pressure difference is reduced, and the swabbing effect is reduced. And (3) continuing to lift the oil pipe, starting to shrink the rubber sleeve 22 in the sealing mechanism, and after the hanging weight of the oil pipe is obviously reduced, continuing to lift the oil pipe, withdrawing the 6 slips 7 supported on the inner wall of the casing pipe in the supporting mechanism, so that the whole testing tool can be smoothly lifted out, and completing the testing operation.

Example two

The utility model provides a be applied to big inclination, complicated orbit well test packer, includes dabber 20, installs top connection 1 in dabber 20 upper end, installs bypass mechanism, sealing mechanism, supporting mechanism and transposition mechanism from top to bottom in proper order outside dabber 20. Wherein:

spacer ring

23, and 3 lower parts of intermediate head pass through threaded connection with adjusting ring 4, and 3 inner chambers of intermediate head pass through threaded connection with packing element dabber 5 to be equipped with the sealing washer, and the installation packing element 22 is established to the cover on the packing element dabber 5, and adjusting ring 4 passes through the screw thread, goes up to detain frock 34 and is connected with slips sliding sleeve 6. After the mandrel 20 is lowered down, the adjusting ring 4 is driven to extrude the rubber cylinder 22, the rubber cylinder 22 starts to compress and expand, the rubber cylinder 22 is sealed on the inner wall of the casing, and the oil sleeve sealing effect is achieved.

Furthermore, in order to improve the limiting effect, the positioning ring 14 and the upper end of the friction block sleeve 15 are limited by a slotted concave end set screw, and the lower end of the friction block sleeve 15 and the fixing ring 16 are limited by a slotted concave end set screw.

EXAMPLE III

spacer ring

The lower extreme of top connection 1 is equipped with the top connection fitting surface of slope, and the upper end of intermediate head 3 is equipped with the intermediate head fitting surface with top connection fitting surface matched with, and the sealing washer is installed on the intermediate head fitting surface, realizes good sealedly like this, guarantees the leakproofness that pressure release passageway 21 closed.

Example four

spacer ring

The two rubber cylinders 22 are arranged side by side, and a spacer ring 23 is arranged between every two adjacent rubber cylinders 22. During installation, the rubber cylinder mandrel 5 is sequentially sleeved with the rubber cylinder 22, the spacer ring 23 and the rubber cylinder 22, so that the sealing effect can be improved.

The utility model discloses a concrete installation does:

1. the lower end of the mandrel 20 is arranged in a vice to be clamped, the threads and the sealing groove at the upper end of the upper joint are coated with lubricating grease, and a sealing ring 26 is installed;

2. firstly, the outer cylinder 13 is sleeved from the upper end of the mandrel 20 and pushed to the lower end, and then the limiting sleeve 12 is arranged in the positioning sleeve 10 and sleeved into the mandrel together after the resetting spring 11 is arranged;

3. sleeving a slip hoop 9 into a slip mandrel 8, connecting and fastening the slip mandrel 8 and a slip sliding sleeve 6 in a threaded manner, and integrally loading the slip mandrel into a mandrel;

4. pushing the slip hoop 9 to the end face of the slip sliding sleeve 6 for fitting, then simultaneously clamping the 6 slips 7 into the limiting groove and the dovetail groove, and pulling back the slip hoop to enable the 6 slips to be completely retracted into the dovetail groove of the slip sliding sleeve; mounting inner hexagonal socket head cap screws 2-M8X25 on the upper end surface of the slip hoop;

5. pushing the limiting sleeve 12 open, rotating the positioning sleeve 10 to be in threaded connection with the slip hoop 9 and fastening;

6. smearing lubricating grease in a limiting groove for installing a steel ball on a mandrel 20, pushing a limiting sleeve 12 open, integrally pushing a slip sliding sleeve component, loading a steel ball 29 to loosen the limiting sleeve after aligning a steel ball hole of a positioning sleeve with the limiting groove of the mandrel through visual observation, and resetting the limiting sleeve to prevent the steel ball from displacing under the action of a reset spring 11; pushing the outer cylinder back to be in threaded connection with the slip hoop and tightly fastening, and installing a 2-M8X14 jackscrew;

7. the rubber cylinder mandrel 5 is arranged into the mandrel 20, inserted into the slips sliding sleeve key groove, and arranged into the adjusting ring 4 to be in threaded connection with and fastened with the slips sliding sleeve 6;

8. sequentially loading the rubber cylinder 22, the spacer ring 23 and the rubber cylinder 22 into the rubber cylinder mandrel 5; the rubber cylinder type can be commonly used with an RTTS packer, and the pressure resistance of the rubber cylinder type reaches 70MPa and the temperature resistance of the rubber cylinder type reaches 150 ℃.

9. The lower end of the middle joint 3 is provided with a 0-shaped sealing ring which is connected and fastened with the adjusting ring 4 in a threaded manner and then fastened with the rubber cylinder core shaft 5 in a threaded manner, and the upper end of the middle joint 3 is provided with a 0-shaped sealing ring 27;

10. an inner hole sealing groove of the upper joint 1 is provided with a 0-shaped sealing ring and is in threaded connection and fastening with the mandrel 20;

11. sleeving the pressure relief joint 2 from the upper joint and fastening the pressure relief joint with the middle joint in a threaded manner;

13. readjusting the clamping position of the tool to the upper end pressure relief joint 2, connecting and fastening the positioning ring 14 and the friction block sleeve 15, then loading the positioning ring and the friction block sleeve into the lower end of the mandrel 20, and installing a limiting jackscrew 32;

14. respectively installing a friction block spring and a friction block at 6 hole positions of the friction block sleeve 15, then installing the fixed ring 16 into the friction block barrel, and installing a limiting jackscrew 32;

15. the transposition pin sleeve 18 is arranged at the lower end of the mandrel 20, the transposition pin 17 is arranged in alignment with the hole position, and the baffle ring 19 is arranged and fastened with the fixed ring 16 in a threaded manner.

The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.

Claims

1. A packer applied to a well with a large inclination and a complex track for testing comprises a mandrel and an upper joint arranged at the upper end of the mandrel, and is characterized in that a bypass mechanism, a sealing mechanism, a supporting mechanism and a transposition mechanism are sequentially arranged on the outer side of the mandrel from top to bottom; wherein:

the supporting mechanism comprises a slip, a slip sliding sleeve in threaded connection with an adjusting ring and a slip core shaft in threaded connection with the slip sliding sleeve, a slip hoop is sleeved on the slip core shaft, and the slip is arranged in a slip groove formed by the slip core shaft, the slip hoop and the slip sliding sleeve; the inner wall of the slip hoop is provided with a step surface for limiting the slip mandrel, and the lower end of the slip hoop is connected with a buffer device for buffering the slip mandrel;

2. The packer for testing the large-inclination complex track well, according to claim 1, is characterized in that: the transposition mechanism comprises a friction block sleeve sleeved outside the mandrel, a friction block spring and a friction block are installed on the friction block sleeve, the upper end and the lower end of the friction block sleeve are respectively in threaded connection with a positioning ring and a fixing ring, the lower end of the fixing ring is in threaded connection with a retaining ring, a transposition pin sleeve is installed between the friction block sleeve and the retaining ring, and a transposition pin located in the track groove is installed in the transposition pin sleeve.

3. The packer for testing the large-inclination complex track well, according to claim 2, is characterized in that: the locating ring is limited by the grooved concave end set screw with the upper end of the friction block sleeve, and the lower end of the friction block sleeve is limited by the grooved concave end set screw with the fixed ring.

4. The packer for testing the large-inclination complex track well, according to claim 1, is characterized in that: buffer includes urceolus, position sleeve, spring, stop collar and steel ball, the position sleeve cover is established at the dabber outside, the urceolus cover is established outside the position sleeve and is formed annular space with position sleeve and slips ring, install the spring in the space, the lower extreme of spring is connected with the stop collar, the stop collar is spacing through fixing the stop screw on the urceolus, the upper end and the slips ring hoop of urceolus and position sleeve link together, the position sleeve lower extreme is equipped with the realization urceolus pivoted steel ball.

5. The packer for testing the large-inclination complex track well, according to claim 1, is characterized in that: the slips sliding sleeve is provided with an inclined plane which is gradually reduced, and slips are placed into the slip groove from the inclined plane at the lower end of the slips sliding sleeve.

6. The packer for testing the large-inclination complex track well, according to claim 1, is characterized in that: the lower end of the upper connector is provided with an inclined upper connector matching surface, the upper end of the middle connector is provided with a middle connector matching surface matched with the upper connector matching surface, and the sealing device is arranged on the middle connector matching surface.

7. The packer for testing the large-inclination complex track well, according to claim 6, is characterized in that: the sealing device is a sealing ring.

8. The packer for testing the large-inclination complex track well, according to claim 1, is characterized in that: the packing element includes two each other side by side, is equipped with the spacer ring between two adjacent packing elements.

9. The packer for testing the large-inclination complex track well, according to claim 1, is characterized in that: and the inner wall of the upper joint and the inner wall of the middle joint are respectively provided with a sealing ring.

10. The packer for testing the large-inclination complex track well, according to claim 1, is characterized in that: the track groove is a slot thereof.