CN116927702A - Continuous jarring releasing device - Google Patents

Abstract

The invention belongs to the technical field of drilling engineering, and discloses a continuous jarring stuck-off device which comprises a pulse jarring unit and a shutoff pressure difference unit, wherein an upper disc valve of the shutoff pressure difference unit is provided with a first state and a second state in the rotating process, when the upper disc valve is rotated to the first state, the upper disc valve covers a main hole to avoid an auxiliary hole, so that the inside of a mounting sleeve is in a high-pressure state, a piston assembly is used for hammering the bottom wall of a first cavity under high pressure to generate vibration, and the vibration is transmitted to a stuck-off piece below through a cylinder assembly and the mounting sleeve, so that the vibration of a fish and a stuck position of the fish is caused. When the upper disc valve rotates to the second state, the upper disc valve covers the auxiliary hole and avoids the main hole, so that the inside of the mounting sleeve is in a normal pressure state, and the piston assembly moves reversely and resets under normal pressure. The upper disc valve continuously rotates relative to the lower disc valve, so that the piston assembly can transmit high-frequency pulse shock waves to the fish through the unclamping piece, the frequency is high, the shock force is large, and the unclamping success rate is effectively improved.

Description

Continuous jarring releasing device

Technical Field

The invention relates to the technical field of drilling engineering, in particular to a continuous jarring stuck remover.

Background

In drilling engineering, drill sticking accidents often occur due to complicated geological structures, improper technical measures, various reasons such as mud, pipe columns, wellbores and the like. The sticking of the drill has great influence on drilling work and is very serious in damage, if the drilling work is improperly processed, the drilling work consumes long time, accidents can be worsened, and even oil and gas wells are scrapped.

In recent years, oil and gas fields are beginning to develop horizontal wells, directional wells, large-displacement wells and geothermal wells on a large scale, and the development is continuously proceeding to shale gas and shale oil directions. In the petroleum development and drilling process, the underground drilling sticking and fish accidents are often caused by factors such as underground tools, drilling tool quality, stratum change, drilling fluid performance and the like. In the later exploitation, the tool clamp (slip or rubber barrel is not thoroughly recovered), the falling object clamp, the sand clamp, the wax clamp, the scale clamp, the sleeve transformer clamp and the corrosive clamp of the underground pipe column are the difficulties frequently encountered in the production process of the oil-water well and the underground well repairing operation.

The jars are one of the effective tools for releasing the stuck drilling and preventing larger accidents, when complex well drilling design is carried out or the possibility of the stuck drilling of a certain well section is predicted, the jars while drilling are used in drilling tool combination in advance, when the drilling tool is stuck, the jars while drilling are used for applying strong upward or downward jars to the stuck point, so that the stuck point is loosened, and the purpose of quickly releasing the stuck drilling tool is achieved. More hydraulic jars are used in the prior art.

However, when using the existing hydraulic jars to provide the upward or downward vibration, the jars can only vibrate once at a time, and the next vibration operation needs to be performed only for a long time, which limits the number of vibrations per minute and also limits the vibration energy transmitted to the fish. When the drill string is in a state of leaning against the well wall in a highly deviated well or a horizontal well and releases the stored elastic potential energy, most of the potential energy is consumed by friction between the drill string and the well wall, the impact force reaching the stuck point is seriously attenuated, and the stuck releasing success rate is greatly reduced. If the impact force is increased and the number of impacts is increased, damage to the drilling tool and drilling equipment is increased, and the risk of secondary accidents is increased.

Accordingly, there is a need for a continuous shock stuck remover that solves the above-described problems.

Disclosure of Invention

The invention aims to provide a continuous shock stuck-releasing device which can continuously shock a fish and directly transmit shock waves to the fish, has high frequency and large shock force, effectively improves the stuck-releasing success rate and has high safety coefficient.

To achieve the purpose, the invention adopts the following technical scheme:

there is provided a continuous shock uncapping apparatus comprising:

The pulse jarring unit comprises a hammer seat, a cylinder body assembly and a piston assembly, wherein a first cavity is formed in the hammer seat, flowing liquid can be introduced into the first cavity, the cylinder body assembly is of a cylindrical structure with two open ends and is connected with the hammer seat, one end of the piston assembly is movably arranged in the first cavity in a penetrating manner, and the other end of the piston assembly is movably arranged in an inner cavity of the cylinder body assembly in a penetrating manner;

the shutoff differential pressure unit comprises a mounting sleeve, a clamping release piece, an upper disc valve and a lower disc valve, wherein two ends of the mounting sleeve are opened, one end of the mounting sleeve is connected to one end of the cylinder body assembly, which is far away from the hammer seat, the other end of the mounting sleeve is connected with the clamping release piece, the clamping release piece is configured to be connected with a fish, a second cavity is vertically and thoroughly arranged on the clamping release piece, the upper disc valve is rotationally arranged in the mounting sleeve, the lower disc valve is fixedly arranged in the mounting sleeve, a main hole and an auxiliary hole are vertically and thoroughly arranged on the lower disc valve, and the diameter of the main hole is larger than that of the auxiliary hole;

the upper disc valve is provided with a first state and a second state, when the upper disc valve rotates to the first state, the upper disc valve covers the main hole and avoids the auxiliary hole, so that the inside of the mounting sleeve is in a high-pressure state, the piston assembly is used for hammering the bottom wall of the first cavity under high pressure, when the upper disc valve rotates to the second state, the upper disc valve covers the auxiliary hole and avoids the main hole, so that the inside of the mounting sleeve is in a normal pressure state, and the piston assembly reversely moves and resets under normal pressure.

As the preferable scheme of the continuous shock stuck-relieving device provided by the invention, two main holes and two auxiliary holes are respectively arranged on the lower disc valve, the two main holes are arranged at intervals along the first diameter of the lower disc valve, the two auxiliary holes are arranged at intervals along the second diameter of the lower disc valve, the first diameter is perpendicular to the second diameter, the upper disc valve comprises a valve body for covering the main holes and the auxiliary holes, and the section of the valve body is rectangular.

As the preferable scheme of the continuous shock stuck-relieving device provided by the invention, an elastic piece is arranged in the cylinder body assembly, the elastic piece can be compressed when the piston assembly hammers the bottom wall of the first chamber, and the piston assembly can move in the direction away from the second chamber under the action of the elastic force of the elastic piece when the upper disc valve rotates to the second state.

As the preferable scheme of the continuous jarring unclamping device provided by the invention, the upper end part of the cylinder body assembly is sleeved on the hammer seat in a threaded manner, the piston assembly is sequentially sleeved with a limiting sleeve, an upper stop ring, the elastic piece and a lower stop ring from top to bottom, the limiting sleeve can be abutted to the bottom surface of the hammer seat, a first limiting step is arranged on the inner wall of the cylinder body assembly, and one side of the lower stop ring, which is opposite to the elastic piece, can be abutted to the first limiting step.

As the preferable scheme of the continuous shock stuck-relieving device provided by the invention, the continuous shock stuck-relieving device further comprises a ball, wherein the outer wall of the piston assembly is concavely provided with a limit groove, and the ball is arranged in the limit groove and can be in rolling fit with the inner wall of the limit sleeve.

As the preferable scheme of the continuous jarring unclamping device provided by the invention, the cylinder body assembly comprises a first-stage cylinder sleeve, a second-stage cylinder sleeve and a third-stage cylinder sleeve which are sequentially connected from top to bottom, the piston assembly comprises a main hammer rod, a first-stage piston rod, a second-stage piston rod and a third-stage piston rod which are sequentially connected from top to bottom, one end of the main hammer rod is movably arranged in the first cavity in a penetrating manner, the other end of the main hammer rod is movably arranged in the first-stage cylinder sleeve in a penetrating manner, one end of the first-stage piston rod is movably arranged in the first-stage cylinder sleeve, the other end of the first-stage piston rod is movably arranged in the second-stage cylinder sleeve in a penetrating manner, one end of the second-stage piston rod is movably arranged in the second-stage cylinder sleeve, the other end of the second-stage piston rod is movably arranged in the third-stage cylinder sleeve in a penetrating manner.

As the preferable scheme of the continuous jarring unclamping device provided by the invention, the upper end part of the primary piston rod is in threaded sleeve connection with the bottom end of the main hammer rod, the limiting sleeve, the upper stop ring, the elastic piece and the lower stop ring are all in sleeve connection with the main hammer rod, and the top surface of the primary piston rod is used for pushing the lower stop ring to move so as to compress the elastic piece.

As the preferable scheme of the continuous jarring unclamping device provided by the invention, the upper end part of the secondary cylinder sleeve is in threaded sleeve with the lower end part of the primary cylinder sleeve, the inner wall of the secondary cylinder sleeve is concavely provided with a second limiting step, the primary piston rod is sleeved with a first fixing sleeve, the upper end of the first fixing sleeve is in contact with the lower end surface of the primary cylinder sleeve, and the lower end of the first fixing sleeve is in contact with the second limiting step;

the upper end thread bush of tertiary cylinder liner is located the lower tip of second grade cylinder liner, the concave third spacing step that is equipped with of inner wall of tertiary cylinder liner, the cover is equipped with the fixed cover of second on the second grade piston rod, the upper end of the fixed cover of second with the lower terminal surface contact of second grade cylinder liner, the lower extreme of the fixed cover of second with the contact of third spacing step.

As the preferable scheme of the continuous jarring unclamping device provided by the invention, the first-stage piston rod comprises a first sleeving part and a first rod body which are connected, the first sleeving part is sleeved on the main hammer rod in a threaded manner, a first sealing element is clamped between the first sleeving part and the inner wall of the first-stage cylinder sleeve, the first fixing sleeve is sleeved on the first rod body, a second sealing element is clamped between the first fixing sleeve and the first rod body, and a third sealing element is clamped between the outer wall of the first fixing sleeve and the inner wall of the second-stage cylinder sleeve;

The second-stage piston rod comprises a second sleeving part and a second rod body which are connected, the second sleeving part is in threaded sleeving at the lower end of the first rod body, a fourth sealing piece is clamped between the second sleeving part and the first rod body, a fifth sealing piece is clamped between the outer wall of the second sleeving part and the inner wall of the second-stage cylinder sleeve, the second fixed sleeve is sleeved on the second rod body, a sixth sealing piece is clamped between the second fixed sleeve and the second rod body, and a seventh sealing piece is clamped between the outer wall of the second fixed sleeve and the inner wall of the third-stage cylinder sleeve;

the third-stage piston rod is sleeved on the second rod body in a threaded mode, an eighth sealing piece is clamped between the third-stage piston rod and the second rod body, and a ninth sealing piece is clamped between the outer wall of the third-stage piston rod and the inner wall of the third-stage cylinder sleeve.

As the preferable scheme of the continuous shock stuck-relieving device provided by the invention, the mounting sleeve comprises a stator sleeve and a connecting sleeve which are arranged from top to bottom, one end of the stator sleeve, which is far away from the connecting sleeve, is connected to the cylinder body assembly, one end of the connecting sleeve, which is far away from the stator sleeve, is connected to the stuck-relieving piece, the upper disc valve and the lower disc valve are both arranged in the connecting sleeve, a rotor is rotationally arranged in the stator sleeve, the lower end of the rotor is connected with a universal joint, and the lower end of the universal joint is connected with the upper disc valve.

The invention has the beneficial effects that:

the invention provides a continuous shock stuck-relieving device which comprises a pulse shock unit and a cut-off pressure difference unit, wherein the pulse shock unit comprises a hammer seat, a cylinder body assembly and a piston assembly, a first cavity is arranged on the hammer seat, flowing liquid can be introduced into the first cavity, and the cylinder body assembly is of a cylindrical structure with two open ends and is connected with the hammer seat. One end of the piston assembly movably penetrates through the first cavity, and the other end of the piston assembly movably penetrates through the inner cavity of the cylinder assembly, namely, the piston assembly can move relative to the cavity wall of the first cavity and the cavity wall of the cylinder assembly. The shutoff differential pressure unit comprises a mounting sleeve, a release clamping piece, an upper disc valve and a lower disc valve, wherein two ends of the mounting sleeve are opened, one end of the mounting sleeve is connected to one end of the cylinder assembly, which is far away from the hammer seat, and an inner cavity of the mounting sleeve is communicated with an inner cavity of the cylinder assembly. The other end of the mounting sleeve is connected with a releasing clamp piece, the releasing clamp piece is configured to be connected with a fish to be salvaged, a second cavity is vertically arranged on the releasing clamp piece in a penetrating mode, and the second cavity is communicated with the inner cavity of the mounting sleeve. The upper disc valve is rotationally arranged in the mounting sleeve, the lower disc valve is fixedly arranged in the mounting sleeve, namely, the upper disc valve and the lower disc valve are oppositely arranged, and the upper disc valve can rotate relative to the lower disc valve. The lower disc valve is vertically communicated with a main hole and an auxiliary hole, and the diameter of the main hole is larger than that of the auxiliary hole. When the fish is fished, the continuous jarring unclamping device is firstly arranged on the whole set of salvaging drilling tools, the whole set of salvaging drilling tools are lowered into the well, the unclamping parts are connected with the fish below, and then the salvaging drilling tools are lifted up to form a certain tensile stress between the salvaging drilling tools and the fish. And then, pumping flowing liquid into the whole set of salvaging drilling tool, wherein the continuous shock stuck releaser can be filled with the continuous flowing liquid through the first cavity, and meanwhile, the upper disc valve rotates relative to the lower disc valve, and after the pumped flowing liquid reaches a certain displacement, the continuous shock stuck releaser starts vibrating. Specifically, the upper disc valve has first state and second state in the rotation process, and when the upper disc valve rotates to first state, the upper disc valve covers the main hole and dodges the auxiliary hole to be in the high-pressure state in the installation sleeve, the piston assembly hammering the diapire of first cavity under high pressure, namely, the piston assembly upwards moves and hammers the hammer seat, and the hammer seat produces vibrations under the impact force, and this vibrations are passed through on cylinder body assembly and the installation sleeve transfer to the relief piece of below, and then cause the vibrations of fish and quilt card position thereof. When the upper disc valve rotates to the second state, the upper disc valve covers the auxiliary hole and avoids the main hole, so that the inside of the mounting sleeve is in a normal pressure state, the piston assembly reversely moves and resets under normal pressure, namely, the piston assembly is far away from the bottom wall of the first chamber under normal pressure. Because the upper disc valve rotates continuously relative to the lower disc valve, the piston assembly repeatedly moves under the continuous high-pressure and low-pressure states to hammer the hammer seat at high frequency, and then high-frequency pulse shock waves are transmitted to the fish through the unclamping piece, so that the fish is promoted to unclamp. The continuous shock releasing device can be used for continuously shocking the fish and directly transmitting shock waves to the fish, is high in frequency and large in shock force, effectively improves releasing success rate and is high in safety coefficient.

Drawings

FIG. 1 is a general assembly view (cross-section) of a continuous shock uncapping device provided in accordance with embodiments of the present invention;

FIG. 2 is a cross-sectional view of a pulse jarring unit provided in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a shutoff pressure differential unit provided in an embodiment of the invention;

FIG. 4 is a cross-sectional view of an upper half of a pulse jarring unit provided in accordance with an embodiment of the present invention;

FIG. 5 is a partial view of FIG. 4;

FIG. 6 is a cross-sectional view of a lower half of a pulse jarring unit provided in accordance with an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is a partial enlarged view at B in FIG. 6;

FIG. 9 is an enlarged view of a portion of FIG. 6 at C;

FIG. 10 is a schematic view of a three-stage piston rod according to an embodiment of the present invention;

FIG. 11 is a schematic view of the structure of the upper half of a shut-off pressure differential unit according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view taken in the direction D-D of FIG. 11;

FIG. 13 is a schematic view of the lower half of a shutoff differential pressure unit according to an embodiment of the present invention;

FIG. 14 is a cross-sectional view in the direction E-E of FIG. 13;

fig. 15 is a cross-sectional view in the direction F-F of fig. 13.

In the figure:

1. a pulse jarring unit; 2. a shutoff pressure difference unit;

11. A hammer seat; 12. a cylinder assembly; 13. a piston assembly; 15. a ball; 16. a first fixing sleeve; 17. a second fixing sleeve;

111. a first chamber; 112. a diversion chamber;

121. a first-stage cylinder sleeve; 122. a second-stage cylinder sleeve; 123. three-stage cylinder sleeve; 124. a breathing hole;

1211. a first limit step; 1221. a second limit step; 1231. a third limit step;

131. a main hammer lever; 132. a first-stage piston rod; 133. a second-stage piston rod; 134. a third-stage piston rod; 135. an overflow hole;

1321. a first sleeve part; 1322. a first rod body; 1331. a second sleeving part; 1332. a second rod body;

141. a limit sleeve; 142. an upper stop ring; 143. an elastic member; 144. a lower stop ring;

181. a first seal; 182. a second seal; 183. a third seal; 184. a fourth seal; 185. a fifth seal; 186. a sixth seal; 187. a seventh seal; 188. an eighth seal; 189. a ninth seal;

21. a mounting sleeve; 22. the unlocking piece; 23. a top disk valve; 24. a lower disc valve; 25. a rotor; 26. a shunt seat; 27. a universal joint;

211. a stator sleeve; 212. a connecting sleeve; 2121. a transfer cylinder; 2122. a connecting cylinder;

221. A second chamber; 231. a connection part; 232. a valve body;

241. a main hole; 242. a secondary hole; 243. a first diameter; 244. a second diameter.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 3, the present embodiment provides a continuous shock stuck-off device including a pulse shock unit 1 and a shutoff pressure difference unit 2. The pulse shock unit 1 is installed above the interception pressure difference unit 2, and the interception pressure difference unit 2 can provide a pressure difference power source for the pulse shock unit 1.

Referring to fig. 1 and 2, the pulse shock unit 1 includes a hammer block 11, a cylinder assembly 12, and a piston assembly 13. Referring to fig. 4, the hammer seat 11 is provided with a first chamber 111, the first chamber 111 is capable of flowing liquid, and the cylinder assembly 12 is of a cylindrical structure with two open ends and is connected with the hammer seat 11. One end of the piston assembly 13 is movably arranged in the first chamber 111, and the other end is movably arranged in the inner cavity of the cylinder assembly 12, i.e. the piston assembly 13 can move relative to the cavity wall of the first chamber 111 and the inner cavity wall of the cylinder assembly 12.

Referring to fig. 1 and 3, the shutoff differential pressure unit 2 includes a mounting sleeve 21, a trip 22, an upper disc valve 23, and a lower disc valve 24. The two ends of the mounting sleeve 21 are open, one end of the mounting sleeve is connected to the end of the cylinder assembly 12 away from the hammer seat 11, and the inner cavity of the mounting sleeve 21 is communicated with the inner cavity of the cylinder assembly 12. The other end of the mounting sleeve 21 is connected with a release piece 22, the release piece 22 is configured to be connected with a fish to be salvaged, a second cavity 221 is vertically and longitudinally arranged on the release piece 22 in a penetrating mode, and the second cavity 221 is communicated with the inner cavity of the mounting sleeve 21. In this embodiment, the lower end of the unclamping member 22 is connected with a retractable fishing tool, and the retractable fishing tool is used for connecting the fish. The retractable fishing tool is of various types, such as a stab nipple, a retractable overshot, a retractable fishing spear, a female cone, a male cone, and the like.

Referring to fig. 3, the upper disc valve 23 is rotatably disposed in the mounting sleeve 21, the lower disc valve 24 is fixedly disposed in the mounting sleeve 21, that is, the upper disc valve 23 and the lower disc valve 24 are disposed opposite to each other, and the upper disc valve 23 can rotate relative to the lower disc valve 24. Referring to fig. 13 and 15, the lower disc valve 24 is vertically provided with a main hole 241 and a sub hole 242 therethrough, and the diameter of the main hole 241 is larger than that of the sub hole 242.

When fishing the fish, the continuous jarring unclamping device is firstly arranged on the whole set of fishing drilling tools, the whole set of fishing drilling tools are lowered into the well, and the retractable fishing tool below the unclamping piece 22 is used for fishing the fish. And then lifting the fishing drilling tool to form a certain tensile stress between the fishing drilling tool and the fish. And then, pumping flowing liquid into the whole set of fishing drilling tool, and enabling the continuous flowing liquid to be introduced into the continuous shock stuck releaser through the first chamber 111, wherein the upper disc valve 23 rotates relative to the lower disc valve 24, and when the pumped flowing liquid reaches a certain displacement, the continuous shock stuck releaser starts vibrating. Specifically, the upper disc valve 23 has a first state and a second state during rotation. When the upper disc valve 23 is rotated to the first state, the upper disc valve 23 covers the main hole 241 to avoid the sub hole 242, so that the inside of the mounting sleeve 21 is in a high pressure state, and the piston assembly 13 hammers the bottom wall of the first chamber 111 under high pressure. That is, the piston assembly 13 moves upward and hammers the hammer seat 11, and the hammer seat 11 generates vibration under impact force, and the vibration is transmitted to the lower unclamping piece 22 through the cylinder assembly 12 and the mounting sleeve 21, thereby causing vibration of the fish and the clamped position thereof. When the upper disc valve 23 is rotated to the second state, the upper disc valve 23 covers the auxiliary hole 242 to avoid the main hole 241, so that the inside of the mounting sleeve 21 is in a normal pressure state, and the piston assembly 13 is reversely moved and reset under normal pressure, i.e., the piston assembly 13 is far away from the bottom wall of the first chamber 111 under normal pressure.

Because the upper disc valve 23 rotates continuously relative to the lower disc valve 24, the piston assembly 13 repeatedly moves under the continuous high-pressure-low-pressure state to hammer the hammer seat 11 at high frequency, so that high-frequency and pulse shock waves are transmitted to the fish through the unclamping piece 22, and the unclamping of the fish is promoted. The continuous shock releasing device can be used for continuously shocking the fish and directly transmitting shock waves to the fish, is high in frequency and large in shock force, effectively improves releasing success rate and is high in safety coefficient.

In this embodiment, the fishing tool has a plurality of combinations. Illustratively, the combination is a retractable fishing tool (such as the retractable fishing spear, the retractable overshot, etc. mentioned above) +the safety joint + the continuous shock uncapping device + the drill pipe in sequence from bottom to top; the combination II comprises a retractable fishing tool, a safety joint, a continuous shock impact unclamping device, a hydraulic impact device, drill collars (3-6) +a hydraulic accelerator+a weighted drill rod (10) +drill rods from bottom to top in sequence; the combination III comprises a retractable fishing tool, a safety joint, a continuous shock and impact release device, a drilling jar, a weighted drill rod (10) and a drill rod from bottom to top. The three combinations of the fishing tools are only listed here, and the suitable combinations can be selected according to the specific type and gravity of the fish during actual fishing, and are not limited to the combinations listed in the embodiment.

In the prior art, the force for lifting the salvaging drilling tool is large, so that overload lifting is caused, in the embodiment, the force applied when the salvaging drilling tool is lifted is small, and the fish can be unclamped by continuous jarring (180-300 jars per minute), so that the unclamped fish can be lifted smoothly.

Referring to fig. 1, 2 and 3, the continuous shock uncapping device has a through passage therein for pumping a flowing liquid. Referring to fig. 4, the upper end of the hammer seat 11 is provided with a diversion chamber 112, the diversion chamber 112 is communicated with the first chamber 111, the lower end of the diversion chamber 112 and the first chamber 111 form a stepped hole structure, and the piston assembly 13 can be hammered on a stepped surface of the stepped hole structure. The upper end of the hammer seat 11 can be connected to other components, and its diversion chamber 112 can introduce the pumped flowing liquid. In this embodiment, a mud pump is used to pump drilling fluid into the through passage of the entire continuous shock stuck remover.

Referring to fig. 13 and 15, in the present embodiment, the main hole 241 and the sub hole 242 are provided in both of the lower disc valve 24. The two primary apertures 241 are spaced apart along a first diameter 243 of the bottom wall valve 24 and the two secondary apertures 242 are spaced apart along a second diameter 244 of the bottom wall valve 24, the first diameter 243 being perpendicular to the second diameter 244. That is, the main holes 241 and the sub holes 242 are arranged at a 90 degree interval therebetween. Further, the distance between the center of the main hole 241 and the center of the lower disc valve 24 is equal to the distance between the center of the sub hole 242 and the center of the lower disc valve 24, i.e., the two main holes 241 and the two sub holes 242 are distributed on the same circumference.

Referring to fig. 13 and 14, the upper disc valve 23 includes a connection portion 231 for connection with a power member for driving the upper disc valve 23 to rotate, and a valve body 232 for covering the main hole 241 and the sub hole 242. The valve body 232 has a rectangular cross section, when the valve body covers the two main holes 241 along the direction of the first diameter 243, the two auxiliary holes 242 can be just avoided, at this time, the second chamber 221 is communicated with the mounting sleeve 21 through the two auxiliary holes 242, the liquid flow passing through the lower disc valve 24 in unit time is instantaneously reduced, so that the liquid in the mounting sleeve 21 and the space at the lower end of the piston assembly 13 is in a high-pressure state, and the piston assembly 13 is upwards hammered into the hammer seat 11 under the action of the high-pressure liquid. When it covers both secondary apertures 242 in the second direction, just two primary apertures 241 can be avoided. At this time, the second chamber 221 is communicated with the mounting sleeve 21 through the two main holes 241, and the liquid flow rate passing through the lower disc valve 24 is instantaneously increased in unit time, so that the liquid in the mounting sleeve 21 and the space at the lower end of the piston assembly 13 is restored to the normal pressure state, and the piston assembly 13 is reversely moved to the restored position.

Referring to fig. 2, in the present embodiment, the cylinder assembly 12 is provided with the elastic member 143, and the piston assembly 13 can compress the elastic member 143 when hammering the bottom wall of the first chamber 111 of the hammer seat 11. When the upper disc valve 23 is rotated to the second state, that is, when the lower end of the piston assembly 13 is in the normal pressure state, the piston assembly 13 can be moved in a direction away from the second chamber 221 by the elastic force of the elastic member 143 to be restored to the original position. By providing the elastic member 143, the piston assembly 13 can be automatically returned under normal pressure, and further, the repeated movement of the piston assembly 13 is realized, so that the hammer seat 11 is hammered with pulse and high frequency.

The upper end portion of the cylinder assembly 12 is sleeved on the hammer seat 11 in a threaded manner, the piston assembly 13 is sequentially sleeved with a limiting sleeve 141, an upper stop ring 142, an elastic piece 143 and a lower stop ring 144 from top to bottom, the limiting sleeve 141 can be abutted on the bottom surface of the hammer seat 11, a first limiting step 1211 is arranged on the inner wall of the cylinder assembly 12, and one side, facing away from the elastic piece 143, of the lower stop ring 144 can be abutted with the first limiting step 1211.

Referring to fig. 2, 4 and 6, alternatively, in the present embodiment, the cylinder assembly 12 includes a first cylinder jacket 121, a second cylinder jacket 122 and a third cylinder jacket 123 sequentially connected from top to bottom, and the piston assembly 13 includes a main hammer rod 131, a first piston rod 132, a second piston rod 133 and a third piston rod 134 sequentially connected from top to bottom. The main hammer rod 131, the primary piston rod 132, the secondary piston rod 133 and the tertiary piston rod 134 are all vertically through-provided with cavities. One end of the main hammer rod 131 movably penetrates through the first chamber 111, the other end of the main hammer rod 131 movably penetrates through the first-stage cylinder sleeve 121, one end of the first-stage piston rod 132 movably penetrates through the first-stage cylinder sleeve 121, the other end of the first-stage piston rod 132 movably penetrates through the second-stage cylinder sleeve 122, one end of the second-stage piston rod 133 movably penetrates through the second-stage cylinder sleeve 122, the other end of the second-stage piston rod 133 movably penetrates through the third-stage cylinder sleeve 123, and the third-stage piston rod 134 movably penetrates through the third-stage cylinder sleeve 123. The main hammer 131, the primary piston rod 132, the secondary piston rod 133, and the tertiary piston rod 134 are synchronously moved by the pushing of the high-pressure liquid so that the main hammer 131 can hammer the hammer seat 11. By arranging the cylinder assembly 12 and the piston assembly 13 as a split structure, the manufacturing, transportation and installation are more convenient. Of course, in other embodiments, the number of the cylinder liners and the piston rods may be increased or decreased as appropriate, and the number of the cylinder liners and the piston rods is not particularly limited herein.

In this embodiment, the upper end thread sleeve of the first-stage cylinder sleeve 121 is arranged at the lower end of the hammer seat 11, which is convenient and quick to install, high in connection strength and not easy to loosen.

In this embodiment, referring to fig. 4 and 5, the upper end portion of the primary piston rod 132 is threaded on the bottom end of the main hammer 131, and the stop collar 141, the upper stop collar 142, the elastic member 143 and the lower stop collar 144 are all sleeved on the main hammer 131, so that the top surface of the primary piston rod 132 is used for pushing the lower stop collar 144 to move to compress the elastic member 143. The first stop step 1211 is disposed on the first stage liner 121. The top surface of the primary piston rod 132 and the outer wall of the main hammer rod 131 form an annular step structure, and when the primary piston rod moves upwards to be in abutting contact with the lower stop ring 144, the lower stop ring 144 can be pushed to move upwards, and the elastic piece 143 is further compressed under the pushing of the lower stop ring 144. When the upper disc valve 23 rotates to the second state, the thrust force borne by the whole piston assembly 13 disappears, and the elastic member 143 releases elastic potential energy to drive the lower stop ring 144 to move downwards until the lower stop ring 144 abuts against the first limiting step 1211. Alternatively, the elastic member 143 is a disc spring assembly, which is excellent in strength and rigidity and long in service life.

Alternatively, referring to fig. 5, balls 15 are disposed between the main hammer rod 131 and the inner wall of the stop collar 141, and when the main hammer rod 131 moves in the first-stage cylinder sleeve 121, the balls 15 and the main hammer rod 131 and the balls 15 and the inner wall of the stop collar 141 are in rolling fit, so that on one hand, the axial movement of the main hammer rod 131 can be supported, the deflection during the movement is avoided, and on the other hand, the friction resistance during the movement of the main hammer rod 131 can be reduced.

Further, the outer wall of the main hammer 131 is concavely provided with a limit groove, and the ball 15 is rollably disposed in the limit groove and is capable of rolling fit with the inner wall of the limit sleeve 141. The ball 15 can be limited by arranging the limiting groove, so that the ball always moves along with the main hammer 131. Alternatively, the limit groove may be an annular groove, and the balls 15 are disposed along the circumferential direction of the annular groove and provided in a plurality of rows.

Referring to fig. 6 and 7, the upper end portion of the second cylinder sleeve 122 is screw-sleeved on the lower end portion of the first cylinder sleeve 121, so that the operation is convenient during connection, and the stability after connection is strong. The inner wall of the second-stage cylinder sleeve 122 is concavely provided with a second limiting step 1221, the first-stage piston rod 132 is sleeved with a first fixing sleeve 16, the upper end of the first fixing sleeve 16 is contacted with the lower end face of the first-stage cylinder sleeve 121, and the lower end of the first fixing sleeve 16 is contacted with the second limiting step 1221. That is, the first fixing sleeve 16 is limited between the lower end surface of the first cylinder sleeve 121 and the step surface of the second limiting step 1221, so that the first fixing sleeve 16 is prevented from sliding relatively. The first fixing sleeve 16 is sleeved on the primary piston rod 132, and can support and guide up and down movement of the primary piston rod 132, so that deflection of the primary piston rod 132 during movement is prevented.

Similarly, referring to fig. 6 and 8, the upper end of the third cylinder sleeve 123 is threadedly engaged with the lower end of the second cylinder sleeve 122, the inner wall of the third cylinder sleeve 123 is concavely provided with a third limiting step 1231, the second piston rod 133 is engaged with a second fixing sleeve 17, the upper end of the second fixing sleeve 17 is in contact with the lower end surface of the second cylinder sleeve 122, and the lower end of the second fixing sleeve 17 is in contact with the third limiting step 1231. That is, the second fixing sleeve 17 is limited between the lower end surface of the second cylinder liner 122 and the step surface of the third limiting step 1231, preventing the second fixing sleeve 17 from sliding relatively. The second fixing sleeve 17 is sleeved on the secondary piston rod 133, and can support and guide the up-and-down movement of the secondary piston rod 133, so that the secondary piston rod 133 is prevented from deflecting during movement.

Referring to fig. 6 and 7, primary piston rod 132 includes a first set of connected portions 1321 and a first rod 1322. The first sleeving part 1321 is in threaded sleeving with the main hammer stem 131, and a first sealing element 181 is clamped between the first sleeving part 1321 and the inner wall of the first-stage cylinder sleeve 121 so as to ensure that the first sleeving part 1321 is in sealing sliding contact with the inner wall of the first-stage cylinder sleeve 121. The first fixing sleeve 16 is sleeved on the first rod 1322, and a second sealing member 182 is clamped between the first rod 1322 and the first rod 1322, so as to ensure that the first rod 1322 is in sealing sliding contact with the inner wall of the first fixing sleeve 16. A third sealing member 183 is interposed between the outer wall of the first fixing sleeve 16 and the inner wall of the second cylinder liner 122 to ensure sealability between the outer wall of the first fixing sleeve 16 and the inner wall of the second cylinder liner 122.

Optionally, the first seal 181 and the second seal 182 are YO-type seal rings, and the third seal 183 is an O-type seal ring.

Referring to fig. 6 and 8, the secondary piston rod 133 includes a second sleeve portion 1331 and a second rod body 1332, where the second sleeve portion 1331 is threadedly sleeved on the lower end of the first rod body 1322, and a fourth sealing member 184 is interposed between the second sleeve portion and the first rod body 1322, so as to ensure tightness of a connection position between the secondary piston rod 133 and the primary piston rod 132. A fifth sealing member 185 is sandwiched between the outer wall of the second sleeving part 1331 and the inner wall of the second cylinder sleeve 122, so as to ensure that the second sleeving part 1331 and the inner wall of the second cylinder sleeve 122 are in sealing sliding contact. Referring to fig. 6 and 9, the second fixing sleeve 17 is sleeved on the second rod 1332, and a sixth sealing member 186 is sandwiched between the second fixing sleeve and the second rod 1332, so as to ensure that the second rod 1332 is in sealing sliding contact with the inner wall of the second fixing sleeve 17. A seventh sealing member 187 is interposed between the outer wall of the second fixing sleeve 17 and the inner wall of the third cylinder liner 123 to ensure sealability between the outer wall of the second fixing sleeve 17 and the inner wall of the third cylinder liner 123.

Optionally, the fourth seal 184 is an O-ring seal and the fifth seal 185 is a YO-ring seal. The sixth seal 186 is a YO-type seal and the seventh seal 187 is an O-type seal.

Referring to fig. 6 and 10, the tertiary piston rod 134 is threadedly sleeved on the second rod 1332, and an eighth sealing member 188 is interposed between the tertiary piston rod 134 and the second rod 1332, so as to ensure the connection tightness between the secondary piston rod 133 and the tertiary piston rod 134. A ninth seal 189 is interposed between the outer wall of the tertiary piston rod 134 and the inner wall of the tertiary cylinder liner 123 to ensure sealing sliding contact between the outer wall of the tertiary piston rod 134 and the inner wall of the tertiary cylinder liner 123.

Optionally, the eighth seal 188 is an O-ring and the ninth seal 189 is a YO-ring.

Referring to fig. 6 and 8, an overflow hole 135 is provided on both the primary piston rod 132 and the secondary piston rod 133 to provide a liquid passage for the operation of the primary piston rod 132 and the secondary piston rod 133. Referring to fig. 6, 7 and 9, the two opposite sides of the secondary cylinder sleeve 122 and the tertiary cylinder sleeve 123 are provided with breathing holes 124 to ensure that the secondary piston rod 133 and the tertiary piston rod 134 can normally move.

Referring to fig. 11 and 13, the mounting sleeve 21 includes a stator sleeve 211 and a connecting sleeve 212 disposed from top to bottom, one end of the stator sleeve 211 away from the connecting sleeve 212 is connected to the cylinder assembly 12, one end of the connecting sleeve 212 away from the stator sleeve 211 is connected to the release member 22, and the upper disc valve 23 and the lower disc valve 24 are disposed in the connecting sleeve 212. The stator sleeve 211 is rotatably provided with a rotor 25, and the rotor 25 is rotatable relative to the stator sleeve 211 for driving the upper disc valve 23 to rotate relative to the lower disc valve 24. In this embodiment, the stator sleeve 211 and the rotor 25 are screw drilling tool structures, which are volumetric downhole power drilling tools that use drilling fluid as power to convert hydraulic pressure energy into mechanical energy. When the drilling fluid pumped by the mud pump flows through the motor, a certain pressure difference is formed between the inlet and the outlet of the motor, so that the rotor 25 is pushed to make eccentric planetary motion around the stator sleeve 211, as shown in fig. 12.

Referring to fig. 11 and 13, a universal joint 27 is connected to a lower end of the rotor 25, and a lower end of the universal joint 27 is connected to the upper disc valve 23. That is, the rotor 25 is connected to the connection portion 231 of the upper disc valve 23 through the universal joint 27 to drive the upper disc valve 23 to perform a centering rotational movement within the connection sleeve 212, avoiding eccentricity when the upper disc valve 23 rotates. Further, a diversion seat 26 is arranged between the rotor 25 and the universal joint 27, a diversion hole is arranged on the diversion seat 26, a cavity is vertically arranged in the rotor 25, and the inner cavity of the connecting sleeve 212 can be communicated with the cavity of the rotor 25 through the diversion hole, so that drilling fluid can push the piston assembly 13 to move upwards. Optionally, the rotor 25 is screwed to the split seat 26, and the split seat 26 is screwed to the universal joint 27.

Referring to fig. 13, coupling sleeve 212 includes a coupling barrel 2121 and a coupling barrel 2122 coupled together, with the end of coupling barrel 2121 remote from coupling barrel 2122 being threadably coupled to stator sleeve 211 and the end of coupling barrel 2122 remote from coupling barrel 2121 being threadably coupled to release member 22. The upper disc valve 23 and the lower disc valve 24 are both disposed inside the connection cylinder 2122. The inner wall of the lower end of the stator sleeve 211 is provided with an internal thread, and the inner wall of the upper end of the connecting cylinder 2122 is also provided with an internal thread, and the upper and lower ends of the switching cylinder 2121 are both provided with external threads, so that the stator sleeve 211 and the connecting cylinder 2122 can be connected through the switching cylinder 2121. In addition, the connecting sleeve 212 is of a split structure, so that the manufacturing, transportation and installation are more convenient.

The construction flow when using the continuous jarring unclamping device provided by the embodiment to salvage the fish is approximately as follows:

s1, well condition understanding: collecting the well Shi Ziliao of the well, knowing basic information such as well sites, roads, casing sizes and the like, and ensuring that a fish cavity of the fish is not blocked by sand and is not buried in annulus, and cleaning by using tools with proper sizes if the phenomena such as sand blocking and sand burying exist;

s2, selecting a fishing tool: selecting a proper retractable fishing tool according to the condition (type, weight and the like) of the fish (the retractable fishing tool is required to have an internal and external circulation channel);

s3, determining a salvage pipe column: according to the condition of the fish and the characteristics of the well body, reasonable salvaging drilling tool combinations and construction designs are formulated, and the salvaging drilling tool combinations are elaborated in the foregoing and are not repeated here;

s4, determining constructors, construction units and construction dates: coordinating each construction unit, construction equipment and constructors, and selecting reasonable time for site construction;

s5, site construction: all equipment and personnel arrive at the construction site within a designated time according to the construction design;

s6, checking a salvaging drilling tool: accurately measuring and recording the length of each drilling rod; checking the button type of the salvaging drilling tool, and providing a basic size and a structure sketch of the salvaging drilling tool assembly, wherein the button type of the salvaging drilling tool is not damaged mechanically;

S7, drilling: lowering a fishing tool according to a construction design, when a retractable fishing tool is lowered to 1-2 meters away from the fish roof of the fish, starting a slurry pump with small discharge capacity to wash the fish roof until the fish roof is thoroughly cleaned, lowering pressurized 10 KN-30 KN, lifting the fishing tool, after the fish is caught, lifting the fishing tool by 200-400 KN (removing the dead weight of the tool) to enable the retractable fishing tool to be tightly engaged with the fish, and then rotating the fishing tool forward for 5-6 circles to lock the turntable;

s8, vibration unlocking: the mud pump is started, the pumping displacement is slowly lifted (when the displacement reaches more than 10L/S), when the obvious jump of a riser pressure gauge, a weight indicator pointer or a drilling machine steel wire rope is observed, the tool starts to work, and the tool is stably and continuously operated under the displacement and the pressure until the fish is released. If the tool still cannot be unlocked after long-time vibration under the displacement and the pressure, the pumping displacement can be changed to change the vibration frequency of the tool;

inside the continuous shock stuck-relief device, the upper disc valve 23 rotates relative to the lower disc valve 24, and high pressure and normal pressure can be generated once each time the upper disc valve 23 rotates once, thereby providing a differential pressure power source for the pulse shock unit 1. When the upper disc valve 23 is rotated to the first state, the upper disc valve 23 covers the main hole 241 to avoid the auxiliary hole 242, so that the inside of the mounting sleeve 21 is in a high pressure state, and the piston assembly 13 hammers the bottom wall of the first chamber 111, i.e., the hammer seat 11, under high pressure. In this embodiment, the piston assembly 13 can quickly impact the impact force of 400KN to the hammer seat 11 under the action of hydraulic pressure, so as to directly transmit the shock wave to the unclamping piece 22, the retractable fishing tool and the fish, and simultaneously compress the elastic piece 143 for energy storage. When the upper disc valve 23 is rotated to the second state, the upper disc valve 23 covers the auxiliary hole 242 to avoid the main hole 241, so that the inside of the mounting sleeve 21 is in a normal pressure state, and the elastic member 143 releases the stored elastic potential energy to reversely move and reset the piston assembly 13, i.e., away from the bottom wall of the first chamber 111. Because the upper disc valve 23 continuously rotates, the action cycle is repeated, and the action cycle can be repeated 180-300 times per minute, so that pulse high-frequency shock waves are formed and transmitted to the fish, and the efficient salvage is realized;

S9, lifting a drill: in the working process of the tool, if a weight indicator or a steel wire rope is found to be obviously loosened, the fish is possibly released, the fishing drilling tool is lifted up for 2 meters, the fishing drilling tool is lowered again for trying to fish the fish, if the suspension weight is not obviously increased, the fish is released (or the fishing tool and the fish drag are blocked), and all the fishing drilling tools are lifted out according to the construction design;

s10, finishing construction and waiting for the next operation.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (10)

1. A continuous shock uncapping apparatus, comprising:

the pulse shock unit (1) comprises a hammer seat (11), a cylinder body assembly (12) and a piston assembly (13), wherein a first chamber (111) is arranged on the hammer seat (11), flowing liquid can be introduced into the first chamber (111), the cylinder body assembly (12) is of a cylindrical structure with two open ends and is connected with the hammer seat (11), one end of the piston assembly (13) is movably arranged in the first chamber (111), and the other end of the piston assembly is movably arranged in an inner cavity of the cylinder body assembly (12);

The intercepting pressure difference unit (2) comprises a mounting sleeve (21), a releasing piece (22), an upper disc valve (23) and a lower disc valve (24), wherein two ends of the mounting sleeve (21) are opened, one end of the mounting sleeve is connected with one end of the cylinder body assembly (12) far away from the hammer seat (11), the other end of the mounting sleeve is connected with the releasing piece (22), the releasing piece (22) is configured to be connected with a fish, a second cavity (221) is vertically and continuously arranged on the releasing piece (22), the upper disc valve (23) is rotationally arranged in the mounting sleeve (21), the lower disc valve (24) is fixedly arranged in the mounting sleeve (21), a main hole (241) and an auxiliary hole (242) are vertically and continuously arranged on the lower disc valve (24), and the diameter of the main hole (241) is larger than that of the auxiliary hole (242).

The upper disc valve (23) has a first state and a second state, when the upper disc valve (23) rotates to the first state, the upper disc valve (23) covers the main hole (241) and avoids the auxiliary hole (242), so that the inside of the mounting sleeve (21) is in a high-pressure state, the piston assembly (13) hammers the bottom wall of the first chamber (111) under high pressure, and when the upper disc valve (23) rotates to the second state, the upper disc valve (23) covers the auxiliary hole (242) and avoids the main hole (241), so that the inside of the mounting sleeve (21) is in a normal-pressure state, and the piston assembly (13) reversely moves and resets under normal pressure.

2. The continuous shock unclamping device according to claim 1, wherein the main holes (241) and the auxiliary holes (242) are provided in two on the lower disc valve (24), two main holes (241) are arranged at intervals along a first diameter (243) of the lower disc valve (24), two auxiliary holes (242) are arranged at intervals along a second diameter (244) of the lower disc valve (24), the first diameter (243) is perpendicular to the second diameter (244), the upper disc valve (23) comprises a valve body (232) for covering the main holes (241) and the auxiliary holes (242), and the valve body (232) has a rectangular cross section.

3. The continuous shock stuck remover according to claim 1, characterized in that an elastic member (143) is arranged in the cylinder assembly (12), the piston assembly (13) can compress the elastic member (143) when hammering the bottom wall of the first chamber (111), and the piston assembly (13) can move in a direction away from the second chamber (221) under the action of the elastic force of the elastic member (143) when the upper disc valve (23) rotates to the second state.

4. The continuous shock unclamping device according to claim 3, wherein the upper end portion of the cylinder assembly (12) is threaded on the hammer seat (11), a limiting sleeve (141), an upper stop ring (142), an elastic piece (143) and a lower stop ring (144) are sequentially sleeved on the piston assembly (13) from top to bottom, the limiting sleeve (141) can be abutted to the bottom surface of the hammer seat (11), a first limiting step (1211) is arranged on the inner wall of the cylinder assembly (12), and one side, facing away from the elastic piece (143), of the lower stop ring (144) can be abutted to the first limiting step (1211).

5. The continuous shock stuck remover according to claim 4, further comprising a ball (15), wherein a limit groove is concavely formed in the outer wall of the piston assembly (13), and the ball (15) is disposed in the limit groove and is capable of rolling fit with the inner wall of the limit sleeve (141).

6. The continuous shock stuck remover according to claim 4, wherein the cylinder assembly (12) comprises a first-stage cylinder sleeve (121), a second-stage cylinder sleeve (122) and a third-stage cylinder sleeve (123) which are sequentially connected from top to bottom, the piston assembly (13) comprises a main hammer rod (131), a first-stage piston rod (132), a second-stage piston rod (133) and a third-stage piston rod (134) which are sequentially connected from top to bottom, one end of the main hammer rod (131) is movably arranged in the first chamber (111) in a penetrating manner, the other end of the main hammer rod is movably arranged in the first-stage cylinder sleeve (121), one end of the first-stage piston rod (132) is movably arranged in the first-stage cylinder sleeve (121) in a penetrating manner, the other end of the second-stage piston rod (133) is movably arranged in the second-stage cylinder sleeve (122), the other end of the second-stage piston rod (133) is movably arranged in the third-stage cylinder sleeve (123) in a penetrating manner.

7. The continuous shock unclamping device according to claim 6, wherein an upper end portion of the primary piston rod (132) is threaded and sleeved at the bottom end of the main hammer rod (131), the limiting sleeve (141), the upper stop ring (142), the elastic member (143) and the lower stop ring (144) are all sleeved on the main hammer rod (131), and a top surface of the primary piston rod (132) is used for pushing the lower stop ring (144) to move so as to compress the elastic member (143).

8. The continuous shock uncapping device of claim 6 wherein,

the upper end part of the secondary cylinder sleeve (122) is in threaded sleeve connection with the lower end part of the primary cylinder sleeve (121), a second limiting step (1221) is concavely arranged on the inner wall of the secondary cylinder sleeve (122), a first fixing sleeve (16) is sleeved on the primary piston rod (132), the upper end of the first fixing sleeve (16) is in contact with the lower end surface of the primary cylinder sleeve (121), and the lower end of the first fixing sleeve (16) is in contact with the second limiting step (1221);

the upper end thread bush of tertiary cylinder liner (123) is located the lower tip of second grade cylinder liner (122), the concave third spacing step (1231) that is equipped with of inner wall of tertiary cylinder liner (123), the cover is equipped with second fixed cover (17) on second grade piston rod (133), the upper end of second fixed cover (17) with the lower terminal surface contact of second grade cylinder liner (122), the lower extreme of second fixed cover (17) with third spacing step (1231) contact.

9. The continuous shock uncapping device of claim 8 wherein,

the primary piston rod (132) comprises a first sleeved part (1321) and a first rod body (1322) which are connected, the first sleeved part (1321) is sleeved on the main hammer rod (131) in a threaded manner, a first sealing element (181) is clamped between the first sleeved part and the inner wall of the primary cylinder sleeve (121), the first fixed sleeve (16) is sleeved on the first rod body (1322) in a sleeved manner, a second sealing element (182) is clamped between the first fixed sleeve and the first rod body (1322), and a third sealing element (183) is clamped between the outer wall of the first fixed sleeve (16) and the inner wall of the secondary cylinder sleeve (122);

the second-stage piston rod (133) comprises a second sleeved part (1331) and a second rod body (1332) which are connected, the second sleeved part (1331) is in threaded sleeve connection with the lower end of the first rod body (1322), a fourth sealing piece (184) is clamped between the second sleeved part (1331) and the first rod body (1322), a fifth sealing piece (185) is clamped between the outer wall of the second sleeved part (1331) and the inner wall of the second-stage cylinder sleeve (122), the second fixed sleeve (17) is sleeved on the second rod body (1332), a sixth sealing piece (186) is clamped between the second fixed sleeve (17) and the inner wall of the third-stage cylinder sleeve (123), and a seventh sealing piece (187) is clamped between the outer wall of the second fixed sleeve (17) and the inner wall of the third-stage cylinder sleeve (123);

The third-stage piston rod (134) is sleeved on the second rod body (1332) in a threaded mode, an eighth sealing piece (188) is clamped between the third-stage piston rod and the second rod body (1332), and a ninth sealing piece (189) is clamped between the outer wall of the third-stage piston rod (134) and the inner wall of the third-stage cylinder sleeve (123).

10. The continuous shock stuck remover according to claim 1, wherein the mounting sleeve (21) comprises a stator sleeve (211) and a connecting sleeve (212) which are arranged from top to bottom, one end of the stator sleeve (211) away from the connecting sleeve (212) is connected to the cylinder assembly (12), one end of the connecting sleeve (212) away from the stator sleeve (211) is connected to the stuck removing piece (22), the upper disc valve (23) and the lower disc valve (24) are both arranged in the connecting sleeve (212), a rotor (25) is rotationally arranged in the stator sleeve (211), the lower end of the rotor (25) is connected with a universal joint (27), and the lower end of the universal joint (27) is connected with the upper disc valve (23).