CN106526076A - Leak stopping instrument capable of adjusting slit width - Google Patents

Abstract

The invention discloses a plugging instrument with adjustable seam width, which comprises a casing, in which a mud chamber and a crack chamber connected in sequence are arranged, and the crack chamber is a gradually changing wedge groove structure from small to large from the top, with opposite The first guide groove and the second guide groove; it also includes a seam adjustment mechanism that can extend into the crack chamber. The seam adjustment mechanism is mainly composed of a hollow operating cylinder, a conversion head and a wedge-shaped seam width adjustment plate. The operating cylinder passes through the limit structure It is assembled in the lower part of the housing in a manner that can be rotated in a circumferential direction. A liquid discharge port connected to the inner hole is provided on the operating cylinder. The upper end of the conversion head is connected with the bottom end of the slit width adjustment plate. The conversion head is assembled on the In the operating cylinder, the slit width adjustment plate is two wedge-shaped plates matching the first and second guide grooves of the crack chamber, and the facing surfaces of the first and second wedge plates form a simulated slit width. It can not only realize the simulation of specific seam width, but also realize the simulation of dynamic seam width. The experimental operation is convenient and flexible, and the test results are accurate and reliable.

Description

An adjustable seam width plugging instrument

technical field

The invention relates to an indoor plugging experiment instrument, in particular to an adjustable gap width plugging instrument.

Background technique

The plugging operation is an important technical measure to solve the lost circulation of oil and gas wells. The technical key to the successful implementation of the plugging operation is to clearly grasp the fracture width of the formation fractures of the oil and gas wells. In order to grasp the formation fracture width of oil and gas wells before the actual plugging operation, indoor plugging experiment is an important technical means.

At present, there are two types of leak plugging instruments commonly used in indoor plugging experiments, namely, specific gap width plugging device and dynamic gap width plugging device. Among them, the simulated fracture width of the specific fracture width plugging instrument is a fixed scale, which is usually realized by filling the middle of the fractured core column with support materials of different thicknesses or replacing the fracture plates with different openings. It can be set For fractures with a large span, each experiment can only test a specific fracture width. For the same set of plugging drilling fluid system, repeated experiments are required to test its plugging effect; it can be seen that not only the experimental process is complicated , long period, high difficulty, high cost, and there is a large error between the test results and the actual situation on site, which is not accurate and reliable enough. The simulated seam width of the dynamic seam width leak plugging instrument can be dynamically adjusted, that is, the seam width is adjustable, which usually adjusts the size of the seam between the seam width adjustment plates by advancing and lowering the linkage parts to simulate different seam scales. Its main function is to simulate and test the loss and return of the plugging drilling fluid system and the plugging effect within a certain range of fracture width variation. It cannot test the plugging situation of a specific fracture width, and its flexibility and reliability are poor.

Contents of the invention

The purpose of the present invention is to: aim at the deficiencies of the above-mentioned prior art, to provide an adjustable seam width plugging that can realize not only specific seam width simulation, but also dynamic seam width simulation, flexible experimental operation, and accurate and reliable test results. instrument.

The technical solution adopted in the present invention is: an adjustable seam width plugging instrument, including a shell, the shell is provided with a mud chamber and a crack chamber connected in sequence, and the crack chamber is from the end close to the mud chamber. It has a small and large tapered wedge groove structure with opposite first guide grooves and second guide grooves; the leak plugging instrument also includes a seam adjustment mechanism that can extend into the crack chamber, and the seam adjustment mechanism is mainly composed of a hollow Composed of operating cylinder, conversion head and wedge-shaped slit width adjustment plate, the operating cylinder is assembled in the lower part of the housing in a circumferentially rotatable manner through a limit structure, and a liquid discharge port communicating with the inner hole is provided on the operating cylinder , the upper end of the conversion head is connected to the bottom end of the slit width adjustment plate, the conversion head is assembled in the operating cylinder with a threaded structure, and the slit width adjustment plate is two pieces matching the first guide groove and the second guide groove of the crack chamber As for the wedge plate, the simulated gap width is formed between the opposing faces of the first wedge plate and the second wedge plate.

As a preferred solution, the first guide groove and the second guide groove of the crack chamber are dovetail groove structures respectively.

As a preferred solution, the upper part of the housing is provided with a head to block the mud chamber, and the head is provided with a pressurized port communicating with the mud chamber, and the pressurized port is connected to the high-pressure nitrogen source through the wellhead pressurized pipeline. connect. Further, the casing is provided with a heating hole for setting a heating pipe and a temperature detection hole for setting a temperature detector. Still further, the housing is mainly composed of a hollow upper sleeve and a lower sleeve which are sealed together.

As a preferred solution, the operating cylinder is provided with a pressurizing port communicating with the inner hole of the operating cylinder, and the pressurizing port is connected to a high-pressure nitrogen source through a bottom hole pressurized pipeline. Further, a liquid discharge mechanism is provided in the inner hole of the operation cylinder, and the liquid discharge mechanism is mainly composed of a piston body, a working rod and a connecting rod arm, and the piston body is arranged in the inner hole of the operation cylinder, corresponding to the Liquid port, the upper end of the working rod is connected to the piston body, and the lower end axially extends out of the bottom end face of the operating cylinder. The connecting rod arm is mainly composed of a crank and a connecting rod piece hinged together. The support piece on the end face is hinged, and the outer end of the connecting rod piece is hinged with the end of the operating rod extending out of the operating cylinder. Still further, the upper outer wall of the operating cylinder is provided with a radially outwardly protruding limiting boss, the operating cylinder is movably connected to the lower part of the inner hole of the housing through the limiting boss, and the upper outer wall of the operating cylinder is connected to the inner hole of the housing. A sealing structure is provided between the lower parts of the holes.

As a preferred solution, the inner edge of the upper end of the conversion head is provided with a bevel stop matching the inclination of the bottom end of the slit width adjustment plate, and the conversion head is locked at the bottom end of the slit width adjustment plate through the bevel stop at the upper end ; The upper and lower outer edges of the adapter are respectively radially outwardly convex boss structures, and the ring wall between the upper and lower outer edges of the adapter is provided with a thread structure, and the thread section in the middle of the adapter is connected with the operation The threaded section in the inner hole of the barrel is matched and assembled, and the upper and lower outer edges of the conversion head are sealed with the upper and lower inner walls of the threaded section in the inner hole of the operating barrel.

As a preferred solution, the leak plugging instrument also includes an adjustment bracket, the adjustment bracket is mainly composed of a transmission shaft and a frame body, the transmission shaft has two sections, and the two transmission shafts are connected in a radially symmetrical structure. In the middle part of the housing, the two transmission shafts are respectively assembled on the frame body through the bearing assembly, and the housing and the seam adjusting mechanism connected together of the leak plugging instrument are suspended in the air. Further, the adjustment bracket also includes an operation wheel, the operation wheel is connected to any transmission shaft, and is used to drive the transmission shaft to rotate under the action of external force.

The beneficial effects of the present invention are:

1. The present invention can not only realize the simulation of specific crack width, but also realize the simulation of dynamic crack width. Its experimental operation is convenient and flexible, and the experimental test results are accurate and reliable, which is conducive to accurate, reliable, efficient and economical measurement of plugging Based on the plugging effect of the drilling fluid system, the formula of the plugging drilling fluid can be adjusted and optimized, and then the plugging effect of the plugging drilling fluid on the actual plugging operation can be improved to ensure the safety, reliability, and safety of oil and gas well drilling. Efficiency and economy;

2. The present invention can accurately control and adjust the simulated fracture width under pressure, so that the plugging effect of the drilling fluid system can be quantitatively evaluated as the fracture width changes with the downhole stress field, which is beneficial to the evaluation of plugging The adaptability of the drilling fluid system to such fracture changes, and a more suitable plugging drilling fluid system formula is screened out;

3. The supporting structure of the present invention can make the experimental operation more simple, convenient and flexible, with high reliability and strong practicability.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a kind of structural representation of the present invention.

FIG. 2 is a side view of FIG. 1 .

The meaning of the codes in the figure: 1—shell; 2—upper sleeve; 3—lower sleeve; 4—operating cylinder; 5—mud chamber; 6—crack chamber; 7—transfer head; 8—drainage port; Head; 10—pressurization port; 11—heating hole; 12—temperature detection hole; 13—second wedge plate; 14—first wedge plate; 15—liquid discharge mechanism; 16—adjusting bracket; 17—frame body; 18—traveling wheel; 19—transmission shaft; 20—operation wheel.

detailed description

Example 1

Referring to Fig. 1 and Fig. 2, the present invention is an adjustable seam width leak plugging instrument, especially an adjustable seam width leak plugging instrument under pressure, which includes a housing 1, a seam adjusting mechanism, a pressure supply system and Adjust the bracket 16.

Wherein, the housing 1 is mainly composed of an upper sleeve 2 and a lower sleeve 3 which are sequentially sealed and connected together. The upper sleeve 2 and the lower sleeve 3 are hollow structures respectively, and are made of stainless steel (such as 316L stainless steel) with a pressure resistance of up to 40MPa and a temperature resistance of up to 220°C; the diameter of the inner hole of the upper sleeve 2 is larger than that of the lower sleeve 3, the bottom of the upper sleeve 2 has a lower joint connected to the top of the lower sleeve 3, the top of the lower sleeve 3 has an upper joint that can extend into the inner hole of the upper sleeve 2, and the lower sleeve 3 passes through the upper joint Connected to the lower joint of the upper sleeve 2, the joint between the two is provided with multiple sealing rings; the upper end of the upper sleeve 2 has an upper joint connected to the head 9, and the upper sleeve 2 is connected to the head 9 through the upper joint , their joints are provided with multiple sealing rings, the annular space of the upper sleeve 2 between the head 9 and the lower sleeve 3 is the mud chamber 2; the inner hole of the lower sleeve 3 is the crack chamber 6, which starts from the top Because of the small and large gradually changing wedge groove structure, that is, the top slit width of the lower sleeve 3 is smaller than the bottom end slit width, the slit chamber 6 of the lower sleeve 3 has a first guide groove and a second guide groove facing each other, the first The guide groove and the second guide groove are dovetail groove structures respectively, the first guide groove and the second guide groove are respectively inclined grooves, and a certain angle is formed between them. It can be seen that the shell 1 is provided with a mud chamber 5 and a crack chamber 6 connected in sequence from top to bottom, and the crack chamber 6 is a gradually changing wedge groove structure from small to large from the end close to the mud chamber 5, with opposite sides. The first guide groove and the second guide groove. The aforementioned casing 1 is provided with a heating hole 11 and a temperature detection hole 12; the heating holes 11 are respectively arranged on the upper sleeve 2 and the lower sleeve 3 of the casing 1, and are used to embed a heating tube to heat the casing through the heating tube. 1 Ambient environment; the temperature detection holes 12 are respectively arranged on the upper sleeve 2 and the lower sleeve 3 of the casing 1, and are used to embed a temperature detector, and the temperature change of the surrounding environment of the casing 1 is detected by the temperature detector. The aforementioned head 9 is provided with a pressure port 10, the inner end of the pressure port 10 communicates with the mud chamber 5, and the outer end is connected with the wellhead booster pipeline of the pressure supply system.

The seam adjustment mechanism can extend into the crack chamber 6 of the housing 1. Specifically, the seam adjustment mechanism is mainly composed of a hollow operating cylinder 4, a conversion head 7 and a wedge-shaped seam width adjustment plate. The upper outer wall of the operating cylinder 4 is provided with a radially outwardly protruding limiting boss, the diameter of which is matched with the diameter of the lower part of the inner hole of the housing 1, and the operating cylinder 4 is axially assembled on the housing through the limiting boss. The lower part of the inner hole of the housing 1 is limited by the stopper connected to the lower part of the inner hole of the housing 1, so that the operating cylinder 4 forms a movable connection that can rotate in the circumferential direction at the lower part of the inner hole of the housing 1, and the upper part of the operating cylinder 4 There are multiple sealing rings between the outer wall and the lower inner wall of the inner hole of the housing 1; a liquid discharge port 8 and a pressurization port are provided in the middle of the operating cylinder 4, and the inner ends of the liquid discharge port 8 and the pressurization port are respectively connected to the operating The inner holes of the barrel 4 are connected, the outer end of the drain port 8 is used to connect the plugging drilling fluid collection system, and the outer end of the pressurization port is connected with the bottom hole booster pipeline of the pressure supply system; the inner hole of the operating barrel 4 is equipped with There is a liquid discharge mechanism 15, the liquid discharge mechanism 15 is mainly composed of a piston body, a working rod and a connecting rod arm, the piston body is arranged in the inner hole of the operating cylinder 4, corresponding to the liquid discharge port 8, the upper end of the working rod is connected to the piston body, the lower end Axially extending out of the bottom end surface of the operating cylinder 4, and extending out of the support frame connected to the bottom end surface of the operating cylinder 4, a downwardly extending support is provided on the support frame, and the connecting rod arm is mainly composed of "7" hinged together. ""-shaped crank and connecting rod piece, the outer end of the crank is hinged with the support on the bottom end surface of the support frame, the outer end of the connecting rod piece is hinged with the end of the operating rod extending out of the operating cylinder 4; the inner hole of the operating cylinder 4 The upper interior is provided with radially raised threaded segments. The inner edge of the upper end of the conversion head 7 is provided with a bevel stop matching the inclination of the bottom end of the slit width adjustment plate, and the conversion head 7 is locked at the bottom end of the slit width adjustment plate through the bevel stop at the upper end; the upper end of the conversion head 7 , and the outer edges of the lower part are respectively radially convex boss structures, the diameter of the bosses on the upper and lower outer edges of the conversion head 7 matches the inner diameter of the inner hole of the operating cylinder 4, and the ring between the upper and lower outer edges of the conversion head 7 The wall is provided with a threaded structure, and the conversion head 7 is assembled in the operation cylinder 4. The threaded section in the middle of the conversion head 7 is matched with the thread section in the inner hole of the operation cylinder 4. The upper and lower outer edges of the conversion head 7 and the operation cylinder 4 The upper and lower inner walls of the threaded section of the inner hole are sealed and assembled; it can be seen that, driven by the circumferential rotation of the operating cylinder 4, the conversion head 7 can achieve axial displacement in the operating cylinder 7. The slit width adjustment plate is two wedge-shaped plates matching the first guide groove and the second guide groove of the crack chamber 6, that is, the first wedge plate 14 and the second wedge plate 13, the outer sides of the first wedge plate 14 and the second wedge plate 13 The surface is inclined structure, the inner surface is straight structure respectively, and the simulated gap width is formed between the facing surfaces (ie, the inner surface) of the first wedge plate 14 and the second wedge plate 13, and the variation range of the simulated gap width is 0-6mm. The height of the simulated seam width is about 50-80mm.

The pressure supply system is mainly composed of a high-pressure nitrogen source (that is, a high-pressure nitrogen cylinder), a wellhead booster pipeline and a bottom-hole booster pipeline; one end of the wellhead booster pipeline is connected to the high-pressure nitrogen source, and the other end is connected to the pressure port on the head 9 10 connection, one end of the bottom-hole pressurization pipeline is connected to the high-pressure nitrogen source, and the other end is connected to the pressurization port on the operating cylinder 4, and the high-pressure nitrogen source is used to flow to the top of the mud chamber 5 1. Pressurization at the bottom of the fracture chamber 6; a cut-off valve for controlling the on-off of the flow channel of the wellhead pressurization pipeline is provided on the wellhead pressurization pipeline; valve.

Adjusting bracket 16 is mainly made up of transmission shaft 19 , frame body 17 and operation wheel 20 . The power transmission shaft 19 has two sections, and the two sections of the transmission shaft 19 are connected to the middle part of the housing 1 with a radially symmetrical structure, that is, a connecting seat is provided in the middle part of the housing 1, and the circumferential direction of the connecting seat has two diameters. A spline joint symmetrical to the position, the two transmission shafts 19 are respectively connected to both sides of the connecting seat in the middle of the housing 1 with a spline structure, and the two transmission shafts 19 are basically on the same radial line of the housing 1; The end of the shaft 19 is assembled on the upper end of the frame body 17 through the bearing assembly, and the middle part of the other transmission shaft 19 is assembled on the upper end of the frame body 17 through the bearing assembly, so as to connect the shells of the leak plugging instrument together 1 and the seam adjustment mechanism are suspended in the air. Four corners of the bottom of the frame body 17 are respectively provided with a traveling wheel 18 . The operating wheel 20 is connected to the end of the transmission shaft 19 extending out of the frame body 17 with a worm gear structure. Under the action of external force, the operating wheel 20 can drive the transmission shaft 19 to rotate on the frame body 17, thereby driving the plugging The housing 1 and the seam adjusting mechanism of the instrument, which are connected together, rotate.

The using method of above-mentioned plugging instrument comprises the following steps:

Step 1. Before the experiment, check whether the pressurization pipeline of the equipment is connected properly; close the valve of the liquid discharge port 8 on the operation cylinder 4, close the valve on the bottom of the well pressurization pipeline, rotate the operation cylinder 4 circumferentially, and adjust the seam width adjustment plate. The slit width between is zero;

Step 2. Inject the plugging drilling fluid into the mud chamber 5, open the valve on the wellhead pressurization pipeline, and pressurize the mud chamber 5 through the pressurization port 10 on the head 9; set the temperature through the temperature control box, so that The heating pipe in the heating hole heats the environment around the shell 1, and at the same time monitors the change of the ambient temperature around the shell 1 through a temperature detector to prevent overpressure in the mud chamber 5 due to temperature rise;

Step 3. When the pressure and temperature of the mud chamber 5 meet the experimental requirements, rotate the operating cylinder 4 circumferentially to adjust the gap width between the seam width adjustment plates; open the drain port 8 on the operating cylinder 4 to measure the plugging drilling fluid the amount of leakage;

Step 4. After the experiment is over, open the drain mechanism 15 in the operating cylinder 4 to recover the plugging drilling fluid; after the experiment or during the process, quickly drain the liquid through the drain mechanism 15 under pressure;

Step 5. If the plugging is successful, test the flowback effect. Specifically, close the valve of the drain port 8 on the operating cylinder 4, vent the pressure in the mud chamber 5, close the liquid discharge mechanism 15 in the operating cylinder 4, and close the wellhead Open the valve on the pressurization pipeline at the bottom of the well, inject high-pressure nitrogen into the fracture chamber 6 through the operating cylinder 4, and apply pressure to test the flowback pressure.

Example 2

The invention is an adjustable seam width leak plugging instrument, which includes a shell, a seam adjustment mechanism and an adjustment bracket.

Wherein, the housing is mainly composed of an upper sleeve and a lower sleeve which are sequentially sealed and connected together. The upper sleeve and the lower sleeve are hollow structures, respectively made of stainless steel (such as 316L stainless steel) with a pressure resistance of up to 40MPa and a temperature resistance of up to 220°C; the diameter of the inner hole of the upper sleeve is larger than that of the lower sleeve Diameter, the bottom end of the upper sleeve has a lower joint connected to the top end of the lower sleeve, the top end of the lower sleeve has an upper joint that can extend into the inner hole of the upper sleeve, and the lower sleeve is connected to the lower joint of the upper sleeve through the upper joint , the connection between the two is provided with multiple sealing rings; the upper end of the upper sleeve has an upper joint connected to the head, and the upper sleeve is connected to the head through the upper joint, and their joints are provided with multiple sealing rings. The annulus of the upper sleeve between the upper sleeve and the lower sleeve is a mud chamber; the inner hole of the lower sleeve is a crack chamber, which has a gradually changing wedge groove structure from small to large from the top, that is, the slot width of the top of the lower sleeve is less than The slit at the bottom end is wide. There are first and second guide grooves facing each other in the crack chamber of the lower sleeve. The first guide groove and the second guide groove are dovetail groove structures respectively. The first guide groove and the second guide groove are respectively The chute forms a certain angle between them. It can be seen that there are sequentially connected mud chambers and crack chambers in the casing from top to bottom, and the crack chamber is a gradually changing wedge groove structure from the end close to the mud chamber, with the first guide groove and the opposite one. Second guide slot.

The seam adjustment mechanism can extend into the crack chamber of the casing. Specifically, the seam adjustment mechanism is mainly composed of a hollow operating cylinder, a conversion head and a wedge-shaped seam width adjustment plate. The outer wall of the upper part of the operating cylinder is provided with a radially outwardly protruding limiting boss. The diameter of the limiting boss matches the diameter of the lower part of the inner hole of the housing. The operating cylinder is axially assembled in the inner hole of the housing through the limiting boss. The lower part is limited by the stopper connected to the lower part of the inner hole of the housing, so that the operating cylinder forms a movable connection that can rotate in the circumferential direction at the lower part of the inner hole of the housing. The upper outer wall of the operating cylinder and the lower inner wall of the inner hole of the housing There are multiple sealing rings between them; there is a drain port in the middle of the operating barrel, the inner end of the drain port communicates with the inner hole of the operating barrel, and the outer end of the drain port is used to connect the plugging drilling fluid collection system; The inner hole of the operating cylinder is provided with a liquid discharge mechanism. The liquid discharging mechanism is mainly composed of a piston body, a working rod and a connecting rod arm. The piston body is arranged in the inner hole of the operating cylinder and corresponds to the liquid discharge port. The body and the lower end axially extend out of the bottom end surface of the operating cylinder, and extend out of the support frame connected to the bottom end surface of the operating cylinder. A downward extending support is provided on the support frame. The connecting rod arm is mainly composed of " Composed of a 7"-shaped crank and connecting rods, the outer end of the crank is hinged with the support on the bottom end of the support frame, the outer end of the connecting rod is hinged with the end of the operating rod extending out of the operating cylinder; the upper part of the inner hole of the operating cylinder The interior is provided with radially raised thread segments. The inner edge of the upper end of the conversion head is provided with a bevel stop matching the inclination of the bottom end of the seam width adjustment plate. The flanges are respectively radially convex boss structures, the diameter of the bosses on the upper and lower outer edges of the conversion head matches the inner diameter of the inner hole of the operating cylinder, and the ring wall between the upper and lower outer edges of the conversion head is provided with a thread structure , the adapter is assembled in the operating barrel, the threaded section in the middle of the adapter is matched with the threaded section in the inner hole of the operating barrel, and the upper and lower outer edges of the adapter are sealed with the upper and lower inner walls of the threaded section of the inner hole of the operating barrel; It can be seen that, driven by the circumferential rotation of the operating cylinder, the conversion head can realize axial displacement in the operating cylinder. The slit width adjustment plate is two wedge-shaped plates matching the first guide groove and the second guide groove of the crack chamber, that is, the first wedge plate and the second wedge plate, and the outer surfaces of the first wedge plate and the second wedge plate are slope structures respectively , the inner surfaces are straight-faced structures respectively, and the simulated gap width is formed between the facing surfaces of the first wedge plate and the second wedge plate (that is, the inner surface). The simulated gap width varies from 0 to 6mm, and the simulated gap width is about 50-80mm.

The adjusting bracket is mainly composed of a transmission shaft, a frame body and an operating wheel. The drive shaft is divided into two sections, and the two sections of the drive shaft are connected in the middle of the housing in a radially symmetrical structure, that is, a connecting seat is provided in the middle of the housing, and the connecting seat has two radially symmetrical positions on its circumference. Spline joint, the two transmission shafts are respectively connected to the two sides of the connecting seat in the middle of the housing with a spline structure, and the two transmission shafts are basically on the same radial line of the housing; the end of one transmission shaft is assembled through the bearing assembly At the upper end of the frame body, the middle part of another transmission shaft is assembled on the upper end of the frame body through a bearing assembly, so that the connected housing and seam adjustment mechanism of the leak plugging instrument are suspended in the air. The bottom four corners of the frame body are respectively provided with a walking wheel. The operation wheel is connected to the end of the transmission shaft extending out of the frame with a worm gear structure. Under the action of external force, the operation wheel can drive the transmission shaft to rotate on the frame, thereby driving the leak plugging instrument and connecting them together. The housing and the seam adjustment mechanism rotate.

The using method of above-mentioned plugging instrument comprises the following steps:

Step 1. Close the valve of the drain port on the operating cylinder, rotate the operating cylinder in a circumferential direction, and adjust the gap width between the gap adjustment plates to zero;

Step 2. Inject the plugging drilling fluid into the mud chamber;

Step 3. Rotate the operating cylinder circumferentially to adjust the gap width between the fracture width adjustment plates; open the drain port on the operating cylinder to measure the leakage of plugging drilling fluid;

Step 4. After the experiment is over, open the drain mechanism in the operating cylinder to recover the plugging drilling fluid; after the experiment or during the process, quickly drain the fluid through the drain mechanism.

Example 3

Other contents of this embodiment are the same as those of Embodiment 1, except that the housing is integrated.

Example 4

Other contents of this embodiment are the same as those of Embodiment 1 or 2, except that the adjustment bracket is cancelled.

The above embodiments are only used to illustrate the present invention, rather than to limit it; although the present invention has been described in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that: the present invention can still be applied to the above-mentioned embodiments. Modifications to the specific technical solutions, or equivalent replacement of some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present invention.

Claims (9)

1. a kind of adjustable slit width leak stopping instrument, including housing（1）, the housing（1）The slurry chamber of sequential communication is provided with inside（5）With split Seam room（6）, it is characterised in that：The crack room（6）From near slurry chamber（5）It is to be tied by little and big step wedge groove that this one end is risen Structure, with the first opposite gathering sill and the second gathering sill；The leak stopping instrument is also included and can extend into crack room（6）Tune Seam mechanism, the Tiao Feng mechanisms are mainly by hollow operation tube（4）, conversion head（7）Constitute with the seam width adjustment plate of wedge shape, it is described Operation tube（4）Position limiting structure being assemblied in housing by way of can rotating in a circumferential direction（1）Bottom, in operation tube（4）It is provided with The leakage fluid dram communicated with endoporus（8）, the conversion head（7）Upper end be connected with the bottom of the wide adjustment plate of seam, conversion head（7）With spiral shell Line Standard is in operation tube（4）Interior, the seam width adjustment plate is matching crack room（6）First gathering sill and the second gathering sill Two pieces of clapboards, the first wedge（14）With the second wedge（13）Forward surface between to constitute simulation seam wide.

2. adjustable slit width leak stopping instrument according to claim 1, it is characterised in that：The crack room（6）The first gathering sill and Second gathering sill is respectively oat tail groove structure.

3. adjustable slit width leak stopping instrument according to claim 1, it is characterised in that：The housing（1）Top be provided with closure mud Slurry room（5）End socket（9）, the end socket（9）It is provided with and slurry chamber（5）The pressurization mouth for communicating（10）, the pressurization mouth（10） It is connected with elevated pressure nitrogen source of the gas by wellhead supercharging pipeline.

4. the adjustable slit width leak stopping instrument according to claim 1 or 3, it is characterised in that：The housing（1）Inside it is provided with for arranging The bottoming hole of heating tube（11）With for arranging the temperature detection hole of temperature sounder（12）.

5. adjustable slit width leak stopping instrument according to claim 1, it is characterised in that：The operation tube（4）It is provided with and operation tube （4）The pressurization mouth that communicates of endoporus, the pressurization mouth is pressurized pipeline by shaft bottom and is connected with elevated pressure nitrogen source of the gas.

6. the adjustable slit width leak stopping instrument according to claim 1 or 5, it is characterised in that：The operation tube（4）Endoporus in be provided with Tapping mechanism（15）, the tapping mechanism（15）Mainly it is made up of piston body, operation bar and pitman arm, the piston body is arranged on Operation tube（4）Endoporus in, correspondence leakage fluid dram（8）, operation bar upper end connection piston body, lower end it is axially extending go out operation tube （4）Bottom end face, the pitman arm are mainly made up of hinged crank and connecting rod piece, the outer end of crank and operation tube （4）Support member on the end face of bottom is hinged, operation tube is extended in the outer end of connecting rod piece and operation bar（4）End be hinged.

7. the adjustable slit width leak stopping instrument according to claim 1 or 5, it is characterised in that：The operation tube（4）External wall of upper portion set There are the cambered outwards positive stop lug boss in footpath, operation tube（4）Housing is movably connected in by positive stop lug boss（1）Endoporus bottom, operation tube （4）External wall of upper portion and housing（1）Endoporus bottom between be provided with sealing structure.

8. adjustable slit width leak stopping instrument according to claim 1, it is characterised in that：The conversion head（7）Upper end inner edge at set There are the inclined-plane seam of the wide adjustment plate bottom gradient of matching seam, the conversion head（7）Seam is latched in by the inclined-plane seam of upper end wide The bottom end of adjustment plate；The conversion head（7）Upper and lower part outer rim be respectively the cambered outwards boss structure in footpath, conversion head（7）'s Ring wall between the outer rim of upper and lower part is provided with helicitic texture, conversion head（7）With the thread segment and operation tube at middle part（4）In endoporus Thread segment matching assembling, conversion head（7）With upper and lower part outer rim and operation tube（4）The upper and lower part inner wall sealing of inner hole thread section Assembling.

9. adjustable slit width leak stopping instrument according to claim 1, it is characterised in that：The leak stopping instrument also includes adjusting bracket （16）, the adjusting bracket（16）Mainly by power transmission shaft（19）And support body（17）Composition, the power transmission shaft（19）For two sections, this two Section power transmission shaft（19）Housing is connected to radial position symmetrical structure（1）Middle part, two sections of power transmission shafts（19）Pass through axle respectively Bearing assembly is assemblied in support body（17）On, by leak stopping instrument, the housing that links together（1）It is hanging with Tiao Feng mechanisms.