CN214697767U

CN214697767U - But area pressure repeated hydraulic clamping becomes whole long section instrument back-off ware of external diameter

Info

Publication number: CN214697767U
Application number: CN202022682378.8U
Authority: CN
Inventors: 李佳欣; 刘跃宝; 王雷; 张怀; 丁立波; 丁舒舒; 邵思禹; 丁向南
Original assignee: Lanxi County Mingyuan Petroleum Equipment Manufacturing Co ltd
Current assignee: Lanxi County Mingyuan Petroleum Equipment Manufacturing Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-11-12
Anticipated expiration: 2030-11-18

Abstract

A pressure repeatable hydraulic clamping variable-outer-diameter integral long-section tool back-off device comprises a one-way valve body assembly and a back-off assembly, wherein the one-way valve assembly comprises a one-way valve body, an upper connector, a one-way valve core, a sealing spring, a sealing element and a one-way valve rod; the upper connector (1) is sleeved on the one-way valve body, a shearing pin (4) is arranged to penetrate through a sleeve of the upper connector and an outer sleeve of the one-way valve body, the lower portion of the upper connector is connected with the upper end of the connector (5) through threads, a cylindrical fishing barrel valve core (6) is connected with the threads of the connector (5) through threads inside the connector, the upper end of a fishing outer barrel (11) is connected with the threads outside the lower end of the connector, the fishing barrel valve core, the lower end of the connector and the fishing outer barrel form an annular cylindrical space, and a connecting sleeve (9) and a fishing inner barrel (10) are installed in the annular cylindrical space; the lower joint of the underground tool is clamped by hydraulic pressure, the clamping state is kept by a one-way pressure maintaining device, and the lower joint is reversely buckled by wellhead operation.

Description

But area pressure repeated hydraulic clamping becomes whole long section instrument back-off ware of external diameter

Technical Field

The utility model belongs to the technical field of the oil field equipment technology and specifically relates to take pressure in the fracturing string of pipe technology field of area and press the whole long section instrument back-off ware of repeatable hydraulic chucking variable external diameter.

Background

With the continuous updating of the construction technology of oil field operation, the snubbing operation is gradually becoming the main method for solving the environmental protection problem and protecting the effective pressure of the stratum. The operation under pressure is a downhole operation technology for pulling out and putting down a tubular column under the conditions of keeping a certain pressure in a shaft, and not killing a well or blowing out. The domestic pressurized operation technology is started late, the matching measures are not systematized, the controllable degree of annular liquid spraying of the oil sleeve and the controllable degree of upward jacking of the tubular column are mature, but the controllable liquid spraying cannot be guaranteed in the aspect of in-pipe plugging. Especially when the tool is used for tool sections with inconsistent inner drift diameters, the tubular column can not be lifted out in a state that the liquid spraying is controllable.

In the application of the plugging method and the plugging device, the plugging method is usually adopted to realize controllable liquid spraying in the pipe. However, the normal tripping of the pipe string with the tripping connector above the tool section can only be ensured under the pressure, when the pipe string of the tool section with the oil pipes connected in series is tripped, because the tool section comprises a plurality of oil pipes and fracturing tools (comprising pipe string type blanking plugs) with different inner drift diameters, and the outer diameter of the blanking plug is usually larger, although the pipe string can pass through each oil pipe in the tool section, the pipe string can not pass through most of tool pipe strings with small inner diameters of the tool section, and the pipe plugging can not be carried out. Therefore, when the tool section pipe column is pulled out, the liquid in the pipe column is inevitably discharged and depressurized, and all the pipe columns of the tool section can be pulled out smoothly after the pressure in the pipe is reduced to 0 MPa. The method increases the drainage time, the drainage time of the wells of individual low-permeability blocks reaches 10-15 days, the completion time of a single well is increased, the waste liquid needs to be transported to a waste liquid treatment place, and the completion cost of the single well is increased.

CN 106761522 provides a break and take off connector of sucker rod in oil pipe, includes: the first connecting device is arranged at the upper end of the body, and the second connecting device is arranged at the lower end of the body, the first connecting device is used for connecting an oil pipe, and the second connecting device is used for automatically connecting a sucker rod when the oil pipe is lowered; the second connecting device comprises a second connecting pipe connected with the body and an automatic clasping device arranged on the inner wall of the second connecting pipe; the automatic enclasping device comprises a plurality of enclasping pieces which are uniformly arranged around the axis of the second connecting pipe; each of the clasping members comprises: the second connecting pipe comprises a slide way arranged on the inner wall of the second connecting pipe along the axial direction, a slide block arranged on the slide way in a sliding manner, and a resetting piece connected with the slide block, wherein the slide way is close to the axis from top to bottom; the dismounting connector is integrally tubular and comprises a first half pipe and a second half pipe which are symmetrically arranged along the axis, and the first half pipe and the second half pipe are detachably connected through a flange; the first connecting device is a first connecting pipe with an adjustable aperture, and a first clamping tooth used for tightly holding the oil pipe is arranged on the inner wall of the first connecting pipe.

The utility model has the following contents:

in order to solve the problem that exists among the background art, the utility model provides a long section instrument back-off ware of repeatedly usable's hydraulic pressure chucking formula. This back-off device can get into the back-off device with single instrument tubular column in the pit among, through the lower clutch of hydraulic pressure chucking downhole tool, keeps the chucking state to carry out the back-off operation by the well head, play out the downhole tool after the back-off again. The tool, namely the back-off device, can lift out all tools with inconsistent outer diameters in the pipe column, and then all the clamp section pipe columns can be lifted out by matching with one-by-one or one-by-one section plug throwing. Therefore, the liquid drainage and depressurization process is omitted, and a large amount of single well completion time and cost are saved.

The technical scheme of the utility model is that the reversible hydraulic clamping variable-outer-diameter integral long-section tool back-off device with pressure consists of a one-way valve body assembly and a back-off assembly; the check valve assembly comprises a check valve body, an upper joint, a check valve spool, a sealing spring, a sealing piece and a check valve rod; the upper joint 1 is sleeved on the one-way valve body and is provided with a shearing pin 4 which is connected with the upper joint 1 sleeve and the outer sleeve of the one-way valve body 2 in a penetrating way, namely the upper joint 1 sleeve and the one-way valve body are connected through the shearing pin, the lower part of the upper joint 1 is connected with the upper end of the connector 5 through a (oil pipe) thread, the cylindrical bailing cylinder valve core 6 is connected with the thread of the connector 5 inside the connector 5 through a thread, the upper end of the salvaging outer cylinder 11 is connected with the thread outside the lower end of the connector 5, the bailing cylinder valve core 6, the lower end of the connector 5 and the salvaging outer cylinder 11 form an annular cylindrical space, the connecting sleeve 9 and the salvaging inner cylinder 10 are arranged in the annular cylindrical space and form a linkage device, the connecting sleeve 9 is sleeved on the periphery of the cylindrical bailing cylinder valve core 6 in an annular way or sleeved on the bailing cylinder valve core 6 through a sealing ring 8, the lower end of the connecting sleeve 9 is fixed with the upper end of the salvaging inner cylinder 10, the connecting sleeve 9 and the salvaging inner cylinder 10, the fishing inner cylinder 10 is attached to the fishing outer cylinder 11 and can slide in the fishing outer cylinder 11, the starting position of the fishing inner cylinder 10 is controlled by the unlocking spring 7 and the sealing ring 8, and the end part of the fishing inner cylinder 10 is elastically fixed by the unlocking spring 7 in the radial direction. The lower port of the salvaging outer cylinder 11 is provided with 12-jack catches, pin shafts and 13-leaf springs, the jack catches 12 are relatively fixed by the pin shafts and can rotate around the pin shafts, the jack catches 12 are supported by the leaf springs and are always in a state of clamping the bottom end of the salvaging inner cylinder inwards, and the bottom end of the salvaging outer cylinder 11 is provided with an outer annular guide sleeve 14 for guiding. The lower end of the fishing barrel valve core 6 is a closed end and is in outward contact with the inner wall of the fishing inner barrel 10; a space with a hole for communicating the salvaging inner cylinder 10 and the unlocking spring 7 is arranged above the closed end and is used as a liquid outlet.

As shown in fig. 2, the one-way valve body assembly 15 has a one-way valve core 16, a cylindrical one-way valve seat therein; the upper end surface or the upper end inclined surface of the cylindrical or disc one-way valve element 16 is limited with the step or the inner inclined surface of the one-way valve seat 15-1, the lower end surface of the one-way valve element 16 is elastically supported by a sealing spring 17, and liquid can only overcome the elastic support from the upper part and flow downwards; the check valve 16 is an inner cylindrical or disc-shaped check valve 16 stopped by an upper step of a check valve seat, the lower end of the check valve 16 is connected with a check valve rod (pipe) 19 in a threaded manner, and a sealing member 18 is used for sealing between the check valve rod 19 and the check valve body assembly 15.

And a pressure converging port bolt 3 of a pressure relief port is arranged on the side wall of the valve seat of the one-way valve.

The clamping length can be determined before application (leaf spring support it is always in inner clamping state, typically 1.5m-3 m). When the tool is applied, a hydraulic system is adopted to pressurize and push the clamping mechanism, and the lower joint of the tool is directly clamped through the variable-outer-diameter part of the fracturing tool, so that the tool is reversely buckled out of the whole tool.

The locking cavity is sealed through the one-way sealing mechanism, so that the locking cavity is kept in a high-pressure clamping state (no liquid can be sprayed upwards to the well through the one-way valve in the well), and the reversing treatment is carried out by using a well head measure. And can be reversed in a downhole high-pressure environment.

After the clamping jaws are twisted, the clamping jaw clamping surfaces are in positive pressure contact with and clamped on the outer surface of a tool pipe column to be reversed, and the outer diameter range of the clamped tool pipe column is large (95mm-116 mm).

The pressure relief bolt is screwed on the ground, so that the high-pressure liquid in the sealing clamping cavity is relieved, the clamping jaw loosens the tool pipe column under the action of the unlocking spring, and the tool of the type can be reversely buckled again after adjustment.

The hydraulic mechanism is adopted to push the clamping jaw to clamp the lower joint of the downhole tool pipe column, the clamping cavity is sealed through the one-way sealing mechanism, high pressure is kept, the clamping jaw is enabled to clamp the lower joint of the downhole tool pipe column all the time, the wellhead measures are utilized to carry out back-off processing, and the clamping jaw is pulled out after the back-off is finished. And screwing the pressure relief bolt on the ground to relieve the pressure of the high-pressure liquid in the sealing and clamping cavity, so that the clamping jaw loosens the tool pipe column. After adjustment, the tool of the type can be salvaged again.

The utility model provides a can repeat hydraulic clamping variable outer diameter whole length instrument back-off ware is pressed in area. This back-off device can make single instrument in the pit get into among the back-off device, through the lower clutch of hydraulic pressure chucking downhole tool, keeps the chucking state by one-way pressurizer to carry out the back-off by the well head operation, play out the downhole tool after the back-off again. The tool can pull out tools with inconsistent outer diameters in the pipe column, and can pull out all clamp section pipe columns by matching with a plugging process. Therefore, the liquid drainage and depressurization process is omitted, and a large amount of single well completion time and cost are saved.

The utility model discloses the effect that has is: the utility model provides a press and can repeat hydraulic clamping variable external diameter whole long instrument back-off ware. The reversing device can enable a single underground tool to enter the reversing device, the clamping state is kept by the one-way pressure maintaining device through the lower joint of the hydraulic clamping underground tool, the reversing is carried out by the operation of a wellhead, and the underground tool after reversing is lifted out. The fracturing tool section pipe column can be hydraulically controlled, and can be clamped, reversed and lifted out through the variable outer diameter section. Can be used to the fracturing to single go into the well with the tool string of outside diameter nonconformity (generally 100mm ~ 116mm) such as spring valve sand blaster, K344 packer, and unable back-off play the condition under high-pressure environment, use the utility model discloses the back-off ware entangles (passes through) the body of tool string from the outside of tool string, through the lower clutch of spring clip and hydraulic system chucking tool string to adopt check valve mechanism to keep its chucking state, caused safety risk to well head operating personnel when having avoided adopting the pump truck to keep suppressing the pressure state. The risk that the oil-contaminated water sprayed out of the pipe, the environment and the operation platform of a wellhead operator are polluted due to the fact that the oil-contaminated water sprayed out of the pipe cannot be thrown and blocked when the oil-contaminated water is lifted out of the tool section pipe column with the variable inner diameter in the fracturing pipe column due to high pressure in the pressurized well is avoided. Especially in winter, the risk of slipping, falling injury and the like of well head operators is easily caused. In addition, the pressure relief in the pipe when the fracturing string is pulled out causes the formation pressure to be reduced, and the condition that the fracturing string is not beneficial to production after pressing is improved.

The utility model discloses the instrument can play out the inconsistent instrument of external diameter in the tubular column, and the stifled technology is thrown in the deuterogamy, just can play out whole fixture section tubular column. Therefore, the liquid drainage and depressurization process is omitted, and a large amount of single well completion time and cost are saved. Use the utility model discloses during the instrument was applied to and is pressed the area and play fracturing string, can not only back-off play whole fracturing tool, can also propose the well head to can continue to carry out the back-off construction after the adjustment. The method provides a feasible coping method for the condition that the tool cannot be lifted out under the condition that liquid spraying cannot be controlled in the pressurized operation pipe, enriches the means of lifting out the tool pipe column of the high-pressure well, is a favorable compensation measure when the pipe blockage fails, and provides reliable operation guarantee for pressurized fracturing.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the unidirectional valve body assembly in fig. 1, which is a pressure relief device of the overshot.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings: as shown in fig. 1-2, wherein: 1-upper joint, 2-one-way valve body assembly, 3-pressure relief port bolt, 4-shearing pin, 5-connector, 6-bailing barrel valve core, 7-unlocking spring, 8-sealing ring, 9-connecting sleeve, 10-salvaging inner barrel, 11-salvaging outer barrel, 12-claw, 13-leaf spring and 14-guide sleeve. 15-one-way valve body assembly, 16-one-way valve core, 17-sealing spring, 18-sealing piece and 19-one-way valve rod.

The fishing assembly comprises a pressure relief port bolt 3, a shearing pin 4, a connector 5, a fishing barrel valve core 6, an unlocking spring 7, a sealing ring 8, a connecting sleeve 9, a fishing inner barrel 10, a fishing outer barrel 11, a clamping jaw 12, a plate spring 13 and a guide sleeve 14; the upper joint 1 is connected with the one-way valve body through a shearing pin 4, the lower part of the upper joint 1 is in threaded connection with the connector 5 through an oil pipe, the fishing cylinder valve core 6 is connected with a screw thread inside the connector 5 and sealed through a sealing ring, the fishing outer cylinder 11 is connected with the screw thread outside the connector 5, the fishing cylinder valve core 6, the lower part of the connector 5 and the fishing outer cylinder 11 form an annular space, a linkage device consisting of a connecting sleeve 9 and a fishing inner cylinder 10 is installed in the annular space, and the initial position of the linkage device is controlled by an unlocking spring 7 and the sealing ring 8. Salvaging the 11 bottoms of urceolus by the fixed jack catch 12 of round pin axle, it is rotatable, and support it by the leaf spring and be in inside chucking state all the time, salvage 11 bottoms of urceolus and have the uide bushing 12 to lead. As shown in fig. 2, a check valve core 16 is arranged inside the check valve body assembly 15, an upper end inclined surface of the valve core 16 is limited with an inner inclined surface of the check valve body assembly 15, a lower end surface of the check valve core 16 is elastically supported by a sealing spring 17, the check valve core 16 is connected with a check valve rod 19 in a threaded manner, and a sealing member 18 is used for sealing between the check valve rod 19 and the check valve body assembly 15.

The upper joint 1 is connected with the one-way valve body assembly 2 through a shearing pin 4, the lower part of the upper joint 1 is connected with the connector 5 through oil pipe threads, the fishing cylinder valve core 6 is connected with a screw thread inside the connector 5 and sealed by a sealing ring, the fishing outer cylinder 11 is connected with a screw thread outside the connector 5, the fishing cylinder valve core 6, the lower part of the connector 5 and the fishing outer cylinder 11 form an annular space, a linkage device consisting of a connecting sleeve 9 and a fishing inner cylinder 10 is arranged in the annular space, and the initial position of the linkage device is controlled by an unlocking spring 7 and a sealing ring 8. Salvaging the 11 bottoms of urceolus by the fixed jack catch 12 of round pin axle, it is rotatable (pivot perpendicular to valve rod), and support it by the leaf spring and be in interior chucking state all the time, salvage 11 bottoms of urceolus and have uide bushing 12 to lead. As shown in fig. 2, a check valve core 16 is arranged inside the check valve body assembly 15, an upper end inclined surface of the valve core 16 is limited with an inner inclined surface of the check valve body assembly 15, a lower end surface of the check valve core 16 is elastically supported by a sealing spring 17, the check valve core 16 is connected with a check valve rod 19 in a threaded manner, and a sealing member 18 is used for sealing between the check valve rod 19 and the check valve body assembly 15.

During the use, the utility model discloses a sealing spring 17 is when natural state, and installation adapter sleeve 9 is in following state with the aggregate unit who salvages inner tube 10 and constitute in the annular space: the salvaging inner cylinder 10 is attached to the salvaging outer cylinder 11 and slides downwards to open the jack catch 12 to sleeve the tool pipe column; firstly at the utility model discloses an intraductal notes liquid of top is suppressed, hydraulic pressure promotes 16 compression sealing spring 17 of check valve case, after the sealing member of check valve case 16 passes through the canned paragraph of check valve body assembly 15 inner wall, when getting into the hole enlargement and crossing the liquid section, high-pressure liquid gets into the connector 5 inner chamber through the liquid space of crossing in the check valve body assembly 15, the liquid outlet of a bailing section of valve case 6, be used in the lower terminal surface of adapter sleeve 9, promote it and go upward, adapter sleeve 9 constitutes the up end of fixed connection salvage inner tube 10, the salvage inner tube that adapter sleeve 9 connects goes upward, it promotes jack catch 12 (can be equipped with evenly distributed's three jack catch) and rotates extreme position when going upward to salvage the inner tube, can reach lock state. At the moment, pressure is applied to the well until the pressure in the pipe is relieved, the check valve core 16 is rebounded to the initial position under the rebounding force of the spring 17 and is sealed, so that high pressure is kept in the inner cavity of the tool string, namely, the clamping jaws 12 are kept in a clamping state. After the tool is reversely buckled and fished out of the ground, the bolt 3 of the pressure relief opening can be screwed to relieve the pressure, or a steel ball is thrown to push the valve body assembly 15 of the one-way valve to move downwards, the pin 4 is cut off, so that the valve body assembly 15 of the one-way valve is communicated with the pressure relief opening of the upper joint 1 to relieve the pressure in the pipe, and the clamping jaw 12 can be unlocked.

Claims

1. The integral long-section tool back-off device capable of achieving hydraulic clamping repeatedly under pressure and changing the outer diameter is characterized by comprising a one-way valve body assembly and a back-off assembly, wherein the one-way valve assembly comprises a one-way valve body, an upper connector, a one-way valve core, a sealing spring, a sealing piece and a one-way valve rod; the upper connector (1) is sleeved on the one-way valve body, a shearing pin (4) is arranged to penetrate through a sleeve of the upper connector (1) and an outer sleeve of the one-way valve body (2), namely, the sleeve of the upper connector and the one-way valve body are connected through the shearing pin, the lower portion of the upper connector is in threaded connection with the upper end of the connector (5), a cylindrical fishing barrel valve core (6) is connected with threads of the connector inside the connector (5) through threads, the upper end of a fishing outer barrel (11) is connected with the threads outside the lower end of the connector, the fishing barrel valve core, the lower end of the connector (5) and the fishing outer barrel form an annular cylindrical space, a connecting sleeve (9) and a fishing inner barrel (10) are arranged in the annular cylindrical space, and form a linkage device; the fishing device is provided with a connecting sleeve, the connecting sleeve is an annular sleeve and is sleeved on the periphery of a cylindrical fishing barrel valve core or is sleeved on a fishing barrel valve core (6) through a sealing ring (8), the lower end of the connecting sleeve is fixed with the upper end of a fishing inner barrel, the fishing inner barrel is attached to the fishing outer barrel and can slide in the fishing outer barrel, the starting position of a fishing inner barrel (10) is controlled by an unlocking spring (7) and the sealing ring (8), and the unlocking spring elastically fixes the end part of the fishing inner barrel in the radial direction; a jack catch is arranged at the lower port of the salvaging outer cylinder (11), a pin shaft and a plate spring (13) are additionally arranged, the jack catch (12) is relatively fixed by the pin shaft and can rotate around the pin shaft, the jack catch (12) is supported by the plate spring (13), the jack catch is always in a state of clamping the bottom end of the salvaging inner cylinder inwards, and an outer annular guide sleeve is arranged at the bottom end of the salvaging outer cylinder for guiding; the lower end of the fishing cylinder valve core is a closed end and is in outward contact with the inner wall of the fishing inner cylinder; a hole is arranged above the closed end and communicated with the space of the salvaging inner cylinder to be used as a liquid outlet.

2. The thread reverser according to claim 1, wherein the cylindrical canister valve element (6) is screwed to a thread on the inside of the tube of the connection head (5) inside the connection head (5).

3. The reversing device according to claim 1, wherein the one-way valve body assembly (15) is internally provided with a one-way valve core (16) and a cylindrical one-way valve seat; the upper end surface of the valve core (16) of the one-way valve and the valve seat (15-1) of the one-way valve are limited by steps or inner inclined surfaces, the valve core of the one-way valve is cylindrical, the lower end surface of the valve core (16) of the one-way valve is elastically supported by a sealing spring (17), and liquid can flow downwards only from the upper part by overcoming the elastic support; the valve core of the one-way valve is stopped by the upper step of the valve seat of the one-way valve, the lower end of the valve core (16) of the one-way valve is in threaded connection with a valve rod (19) of the one-way valve, and the valve rod (19) of the one-way valve is sealed with a valve body assembly of the one-way valve through a sealing piece (18).

4. The reverse fastener of claim 1, wherein a pressure relief port converging bolt (3) of the pressure relief port is installed on the side wall of the valve seat of the one-way valve.

5. The undercutter of claim 1, wherein the length of the fishing inner barrel determines the gripping length.

6. The inverter of claim 3, wherein: after the clamping jaws are twisted, the clamping jaw clamping surfaces are in positive pressure contact with the outer surface of a tool to be reversed and clamped, and the outer diameter range of the clamping tool is 95-116 mm.

7. The inverter of claim 5, wherein: the length of the salvaging inner cylinder is 1.5m-3 m.