Sand control hydraulic anchor for oil development

Abstract

The present application relates to the technical field of hydraulic anchor, especially to a sand-preventing hydraulic anchor for oil development, which comprises an anchor body, the anchor body is provided with a communicating annular cavity, the anchor body is provided with through grooves which are distributed at equal intervals in the circumferential direction and are all communicated with the annular cavity, anchor claws are sealingly and slidably connected in the through grooves, first tension springs are fixedly connected between the anchor claws and the anchor body, the anchor claws are provided with clamping teeth, the anchor claws are fixedly connected with limiting rods which are sealingly and slidably connected with the anchor body, and balls are arranged in the anchor body for extruding the limiting rods which are distributed at equal intervals in the circumferential direction. Whether the ball passes through the anchor body or not is used to determine whether the anchor claws are completely attached to the well wall, and the operator can determine whether the oil pipe is anchored by the hydraulic anchor by judging the change of the downhole pressure instead of the simple pressurizing mode, so as to ensure that the hydraulic anchor successfully fixes the oil pipe on the well wall and prevents the anchor claws from being in protruding contact with the well wall to cause low anchoring force.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic anchor, in particular to a sand-proof hydraulic anchor for oil development. BACKGROUND

[0002] In the downhole operation of oil development, hydraulic anchor is a key tool for fixing the downhole pipe string in the process of fracturing, testing and other operations to prevent axial movement. The traditional hydraulic anchor usually relies on the hydraulic drive of the anchor jaw to stretch out radially from the anchor body to make it engage with the inner wall of the casing to achieve anchoring. In order to prevent formation sand from entering the inside of the anchor body and affecting the mechanism action, the existing technology usually sets a sand-proof structure such as a filter screen or a spacer ring inside the hydraulic anchor to block the sand from entering the hydraulic drive area.

[0003] However, when such hydraulic anchor is applied to the open hole section, its working environment changes significantly. The open hole well wall is an irregular curved surface directly composed of formation rock, which has natural protrusions, depressions or cracks, which is quite different from the smooth and regular inner wall of the casing. Although the anchor jaw of the existing hydraulic anchor is designed as a circular arc matching the theoretical well diameter, in the actual downhole process, the operator cannot directly observe the downhole situation and can only control the stretching out of the anchor jaw by applying hydraulic pressure on the ground. If the anchor jaw happens to contact with the local protrusion of the well wall during the stretching out process, even if the system pressure has reached the designed anchoring value, the anchor jaw will not be able to stretch out completely due to the local obstruction, resulting in that the circular arc surface of the anchor jaw cannot be fully fitted with the well wall, the actual contact area between the anchor jaw and the well wall is reduced, and the anchoring force is significantly reduced, which poses a risk of pipe string displacement. SUMMARY

[0004] In order to overcome the technical problem that the existing hydraulic anchor cannot detect whether the anchor jaw has been stretched out of the anchor body, the present application provides a sand-proof hydraulic anchor for oil development.

[0005] The technical solution of the present application is as follows: a sand-proof hydraulic anchor for oil development, comprising an anchor body, the anchor body is provided with a communicating annular cavity, the anchor body is provided with through grooves which are distributed at equal intervals in the circumference and are all in communication with the annular cavity, an anchor jaw is sealingly and slidably connected in the through grooves, a first tension spring is fixed between the anchor jaw and the anchor body, the anchor jaw is provided with a tooth for fixing the anchor body on the well wall, a limiting rod is sealingly and slidably connected with the anchor body and is fixed to the anchor jaw, a ball is arranged in the anchor body for extruding the limiting rods which are distributed at equal intervals in the circumference, and the inner diameter of the ball is equal to the inner diameter of the anchor body.

[0006] As a further preferred solution, the length of the limiting rod inserted into the anchor body is less than the inner radius of the anchor body.

[0007] As a further preferred aspect, the rotating sleeve is provided with wave grooves which are circumferentially and equidistantly distributed and used for placing the adjacent pawls, so as to increase the contact area between the rotating sleeve and the pawls.

[0008] As a further preferred aspect, the rotating sleeve is provided with wave grooves which are circumferentially and equidistantly distributed and used for placing the adjacent pawls, so as to increase the contact area between the rotating sleeve and the pawls.

[0009] As a further preferred aspect, the arc of the arc-shaped portion of the sliding slot in the horizontal plane is greater than the arc of the through groove in the horizontal plane.

[0010] As a further preferred aspect, the annular cavity is slidably connected with a pushing ring which is located between the pressure ring and the anchor claw, the anchor body is provided with an L-shaped groove which communicates the annular cavity with the guide slot, and the communication between the L-shaped groove and the annular cavity is located between the pressure ring and the pushing ring.

[0011] As a further preferred aspect, the distance between the pressure ring and the pushing ring is equal to the vertical height of the sliding slot.

[0012] As a further preferred aspect, the rotating sleeve is hingedly connected with rotating plates which are circumferentially and equidistantly distributed, and torsional springs are fixed between the rotating plates and the rotating sleeve.

[0013] As a further preferred aspect, the anchor body is fixed with intercepting plates which are circumferentially and equidistantly distributed and located in the adjacent placement grooves, and the intercepting plates are used for pressing the adjacent rotating plates.

[0014] As a further preferred aspect, the intercepting plates are provided with inclined surfaces which are used for guiding the rotating plates.

[0015] Beneficial effects: the application determines whether the anchor claw is completely fitted with the well wall by whether the ball passes through the anchor body, and the operator can determine whether the tubing is anchored by the hydraulic anchor by judging the change of downhole pressure, rather than a simple pressurization method, to ensure that the hydraulic anchor successfully fixes the tubing on the well wall, prevents the anchor claw from protruding contact with the well wall to cause low anchoring force, protects the outside of the anchor claw by rotating the sleeve before the hydraulic anchor moves to the designated position, prevents the hydraulic anchor from anchoring in advance due to the influence of downhole pressure, rotates the rotating plate by the torsional spring to make the rotating plate contact with the well wall, thereby detecting the well wall condition in advance, without protruding contact of the anchor claw with the well wall, to ensure that the anchor claw is not damaged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0017] Figure 2 is a schematic diagram of the three-dimensional structure of the anchor body and the tooth of the application;

[0018] Figure 3 is a schematic diagram of the three-dimensional structure of the application Figure 2 at A;

[0019] Figure 4 is a schematic diagram of the three-dimensional structure of the application;

[0020] Figure 5 is a schematic diagram of the three-dimensional structure of the anchor body and the tooth of the application;

[0021] In the figure, marked: 1- anchor body, 101- annular cavity, 102- through slot, 103- guide slot, 104- L-shaped slot, 2- anchor claw, 21- first tension spring, 201- tooth, 202- limiting rod, 3- ball, 4- rotating sleeve, 401- placing groove, 402- wave groove, 403- sliding groove, 5- pressure ring, 51- second tension spring, 6- connecting rod, 7- push ring, 8- rotating plate, 9- torsional spring, 10- intercepting plate. DETAILED DESCRIPTION

[0022] The application will be further described in detail below in combination with the drawings and specific embodiments, but the protection scope and application scope of the application are not limited. Example 1

[0023] The existing hydraulic anchor relies on the operator to squeeze at the well mouth to make the anchor claw protrude out of the anchor body to contact the inner wall of the casing during operation. However, for the open hole, the hydraulic anchor will contact the well wall instead of the inner wall of the casing. During the process of opening the oil well, the well wall is not a complete cylindrical surface, and there will be protrusions. In order to increase the contact area between the anchor claw and the well wall, i.e. the stability of the anchor claw, the outer side of the anchor claw is arc-shaped when it is set, so as to ensure that the inner diameter of the well wall is equal. After the anchor body is placed in the well, the operator cannot observe the condition of the well wall, and the operator only makes the anchor claw protrude out of the anchor body by pressurization. If the anchor claw contacts the protrusion of the well wall, even if the pressure reaches the stable pressure of the anchor claw, the anchor claw does not completely protrude out of the anchor body, and the arc-shaped outer side of the anchor claw does not completely fit the well wall, so that the stability between the anchor claw and the well wall is reduced, thereby reducing the stability between the oil pipe and the well wall and affecting the oil pumping process.

[0024] A sand-preventing hydraulic anchor for oil development, as shown in Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , comprises an anchor body 1, the anchor body 1 is provided with six constant pressure holes distributed at equal intervals in the circumferential direction, the anchor body 1 is provided with an annular cavity 101 communicating with the six constant pressure holes, the anchor body 1 is provided with five through grooves 102 distributed at equal intervals in the circumferential direction and all communicating with the annular cavity 101 (the number is limited only for example, and the specific number is referred to the actual use condition), the anchor claw 2 is sealingly and slidably connected in the through groove 102, the first tension spring 21 located in the annular cavity 101 is fixed between the anchor claw 2 and the anchor body 1, the outer side of the anchor claw 2 is provided with the pawl 201 for fixing the anchor body 1 on the well wall (the pawl 201 is designed in one piece with the anchor claw 2), the anchor claw 2 is fixed with the limiting rod 202 sealingly and slidably connected with the anchor body 1, the anchor body 1 is provided with the ball 3 for extruding the five limiting rods 202, the inner diameter of the ball 3 is equal to the inner diameter of the anchor body 1, so as to ensure that the ball 3 and the anchor body 1 form a sealed environment, the ball 3 is made of dissolvable material, when the ball 3 falls into the anchor body 1 and contacts the limiting rod 202, the sealing part of the ball 3 and the anchor body 1 is located below the constant pressure hole of the anchor body 1, the length of the limiting rod 202 protruding into the anchor body 1 is less than the inner radius of the anchor body 1 and equal to the distance between the anchor claw 2 and the well wall, so as to ensure that when the outer side of the anchor claw 2 contacts the well wall, the ball 3 smoothly passes through the anchor body 1.

[0025] This hydraulic anchor is lowered downhole along with the tubing. After the anchor body 1 is placed in the designated position downhole, the operator first inserts a ball 3 into the tubing. The ball 3 enters the anchor body 1 and contacts the five limiting rods 202. The ball 3 is limited by the five limiting rods 202 and cannot move downwards. The ball 3 seals the middle part of the anchor body 1. Then, the operator pressurizes the tubing (usually by injecting water). The water in the anchor body 1 enters the annular cavity 101 and pushes the five anchor claws 2 away from each other. When spring 21 is stretched, the five anchor claws 2 move the five limiting rods 202 away from each other. If the anchor claws 2 do not contact the well wall protrusion (in the following description, the anchor claw 2 in contact with the well wall actually refers to the locking teeth 201 on the anchor claw 2 contacting the well wall; in reality, the locking teeth 201 on the anchor claw 2 and the anchor claw 2 are designed as a single unit), then the five limiting rods 202 will release the interception of the ball 3. The pressure inside the anchor body 1 pushes the ball 3 downward. When the operator detects a sudden decrease in the downhole pressure, they determine that the ball 3... After successfully passing through the anchor body 1, all five anchor claws 2 eventually contact the well wall, completing the fixing process between the anchor body 1 and the well wall. If one of the anchor claws 2 contacts a protrusion on the well wall, the limiting rod 202 on that anchor claw 2 will not release the limiting of the ball 3. If the operator detects that the downhole pressure has not decreased, it is determined that the ball 3 has not passed through the anchor body 1, and all five anchor claws 2 have not contacted the well wall. Therefore, the operator stops pressurizing the well. The tension of the five first tension springs 21 is released, causing the five anchor claws 2 to move closer to each other. The operator then needs to adjust the position of the anchor body 1 and repeat the above steps until the ball 3 passes through the anchor body 1 to complete the fixing process. The ball 3 is a soluble material that will automatically dissolve after a period of time downhole and will not affect the oil pumping process. Moreover, this hydraulic anchor can share a ball 3 with the packer installed below it. When it is necessary to release the fixing between this hydraulic anchor and the well wall, the operator stops pressurizing the pipe, and the five anchor claws 2 no longer contact the well wall. The hydraulic anchor is then in use. Example 2

[0026] Based on Example 1, a sand-control hydraulic anchor for oil development, such as... Figures 1-5As shown, a rotating sleeve 4 for protecting the anchor claw 2 is rotatably connected to the outer side of the anchor body 1. The rotating sleeve 4 is provided with five placement slots 401 that are circumferentially evenly distributed for adjacent anchor claws 2 to protrude. A pressure ring 5 is slidably connected to the upper side of the annular cavity 101. The constant pressure hole of the anchor body 1 is located above the pressure ring 5. The annular cavity 101 is filled with hydraulic oil. A second tension spring 51 is fixed between the pressure ring 5 and the anchor body 1. The anchor body 1 is provided with guide grooves 103 (two are shown in the figure; in this embodiment, one is used). (Description of line) Anchor body 1 is sealed and slidably connected to a connecting rod 6 fixed to the upper side of pressure ring 5. The connecting rod 6 slides within guide groove 103, which provides sliding space for the connecting rod 6. Rotating sleeve 4 is provided with a sliding groove 403 for the connecting rod 6 to slide. The sliding groove 403 is provided with an arc-shaped part and a vertical part (the arc-shaped part is located above the vertical part). The vertical part of the sliding groove 403 is connected to the adjacent placement groove 401. In the initial state, the lower end of the connecting rod 6 is located above the arc-shaped part of the sliding groove 403. Rotating sleeve 4 is connected to the anchor body 1. The claw 2 is shielded on the outside. The rotating sleeve 4 is provided with five circumferentially spaced wavy grooves 402 for placing adjacent retaining teeth 201, which increases the contact area between the rotating sleeve 4 and the retaining teeth 201. The retaining teeth 201 will contact the adjacent wavy grooves 402 of the rotating sleeve 4, thereby reducing the squeezing force on the retaining teeth 201 and protecting the retaining teeth 201. The arc of the curved part of the slide groove 403 is greater than the arc of the through groove 102 in the horizontal plane, ensuring that the lower end of the connecting rod 6 slides from one side of the arc groove of the slide groove 403 to the other side. When the side is turned, the rotating sleeve 4 no longer obstructs the outside of the anchor claw 2. The annular cavity 101 is slidably connected to the push ring 7 located between the pressure ring 5 and the anchor claw 2. The anchor body 1 is provided with an L-shaped groove 104 that connects the annular cavity 101 and the guide groove 103. The connection between the L-shaped groove 104 and the annular cavity 101 is located between the pressure ring 5 and the push ring 7. The distance between the pressure ring 5 and the push ring 7 is equal to the vertical height of the slide groove 403. When the pressure ring 5 contacts the push ring 7, the lower end of the connecting rod 6 is located on the lower side of the arc groove of the slide groove 403.

[0027] During the insertion of this hydraulic anchor into the well, downhole pressure fluctuations may occur, causing the packer to set prematurely, and the hydraulic anchor to also anchor prematurely. This leads to wear and tear between the anchor claw 2 and the wellbore, resulting in decreased stability between the subsequent tubing and the wellbore. To address these issues, the following operations are performed. The initial state of this hydraulic anchor is as follows: Figure 1As shown, the lower end of the connecting rod 6 is located on the upper side of the arc-shaped part of the slide groove 403. The five placement grooves 401 and the five anchor claws 2 are staggered. The rotating sleeve 4 will block the outside of the anchor claws 2 to prevent the anchor claws 2 from protruding out of the anchor body 1 in advance and protect the anchor body 1. When the hydraulic anchor moves to the designated position, the pressure inside the anchor body 1 pushes the pressure ring 5 to move downward, and the second tension spring 51 is stretched. Since the rotating sleeve 4 blocks the outside of the anchor claws 2, the anchor claws 2 cannot protrude out of the anchor body 1, and the push ring 7 cannot move downward. The pressure ring 5 then discharges the fluid below it into the well through the L-shaped groove 104 and the guide groove 103. During the downward movement of the pressure ring 5, the pressure ring 5 drives the connecting rod 6 to move downward. The lower end of the connecting rod 6 squeezes the rotating sleeve 4 through the slide groove 403, causing the rotating sleeve 4 to rotate counterclockwise. Figure 4 (Top view direction), while the rotating sleeve 4 gradually releases the obstruction on the outside of the anchor claw 2, when the lower end of the connecting rod 6 moves to the lower side of the arc-shaped part of the slide groove 403, the pressure ring 5 contacts the push ring 7, and the anchor claw 2 aligns with the adjacent placement groove 401. As the pressure ring 5 continues to move downward, the pressure ring 5 drives the push ring 7 to move downward and pushes the hydraulic oil below it to move the five anchor claws 2 away from each other. The downward movement of the pressure ring 5 drives the lower end of the connecting rod 6 to slide downward along the vertical part of the slide groove 403. Then the operator continues to repeat the steps in embodiment 1 so that all five anchor claws 2 are in contact with the well wall, find the fixed position of this hydraulic anchor and fix it on the well wall.

[0028] In Example 1, when the operator stops applying pressure to the oil pipe, the second tension spring 51, which is in a stretched state, drives the pressure ring 5 to move upward. The five anchor claws 2 enter the adjacent through groove 102 under the pull of the five first tension springs 21. The pressure ring 5 drives the lower end of the connecting rod 6 to slide upward along the vertical part of the slide groove 403. When the first tension spring 21 is reset, as the pressure ring 5 continues to move upward, the pressure ring 5 separates from the push ring 7. The pressure ring 5 drives the lower end of the connecting rod 6 to slide upward along the arc-shaped part of the slide groove 403. The rotating sleeve 4 rotates clockwise to gradually cover the outside of the anchor claw 2. After the tension of the second tension spring 51 is released, the lower end of the connecting rod 6 is located on the upper side of the arc-shaped part of the slide groove 403. The rotating sleeve 4 covers the outside of the anchor claw 2 and protects the anchor claw 2. Example 3

[0029] Based on Example 2, a sand-control hydraulic anchor for oil development, such as... Figures 1-3 and Figure 5 As shown, the rotating sleeve 4 is hinged to five rotating plates 8 that are circumferentially evenly distributed. A torsion spring 9 is fixed between the rotating plate 8 and the rotating sleeve 4. In the initial state, the torsion spring 9 is in a charged state. The anchor body 1 is fixed to five intercepting plates 10 that are circumferentially evenly distributed and located in adjacent placement slots 401. The intercepting plates 10 are used to squeeze the adjacent rotating plates 8. The intercepting plates 10 are provided with inclined surfaces to guide the rotating plates 8.

[0030] Although the above embodiments can determine whether the anchor claw 2 is in contact with the well wall protrusion by detecting whether the anchor claw 2 is fully extended, this process still requires the anchor claw 2 to be in contact with the well wall. When the anchor claw 2 is in contact with the well wall protrusion, the force-bearing area of ​​the anchor claw 2's teeth 201 will be uneven, making it prone to damage. Moreover, it can only detect well wall protrusions and cannot detect well wall depressions. To solve the above problems, the following operation is performed: In the initial state, the rotating plate 8 is limited by the adjacent intercepting plate 10 and is tightly attached to the rotating sleeve 4, and the torsion spring 9 is in a stored state. During the counterclockwise rotation of the rotating sleeve 4 in Embodiment 2, the rotating sleeve 4 drives the five rotating plates 8 to rotate counterclockwise synchronously. Taking one of the rotating plates 8 as an example, the rotating plate 8 rotates counterclockwise around the anchor body 1 to gradually release the limitation of the intercepting plate 10. After the intercepting plate 10 no longer limits the rotating plate 8, the torsion spring 9 The torque release causes the rotating plate 8 to rotate clockwise. The outer side of the rotating plate 8 (the side away from the rotating sleeve 4) contacts the well wall. As the rotating sleeve 4 continues to rotate counterclockwise, when the outer side of the rotating plate 8 contacts the protrusion of the well wall, the rotating plate 8 is limited by the protrusion and cannot continue to rotate. When the rotating plate 8 contacts the concave part of the well wall, the torque of the torsion spring 9 continues to release, causing the rotating plate 8 to rotate clockwise. The outer side of the rotating plate 8 inserts into the concave part of the well wall, and at the same time, the rotating plate 8 can no longer rotate. At this time, the rotating sleeve 4 cannot rotate and still blocks the outer side of the anchor claw 2, while the pressure ring 5 cannot move downward. If the operator detects that the pressure in the well does not decrease instantaneously, it is determined that one of the rotating plates 8 is in contact with the protrusion or concave part of the well wall, and the position of the hydraulic anchor is adjusted until the rotation of the rotating plate 8 driven by the rotating sleeve 4 is no longer obstructed. The final state is as follows. Figure 5 As shown, during the clockwise rotation of the rotating sleeve 4, the rotating sleeve 4 drives the five rotating plates 8 to rotate clockwise. The outer side of the rotating plate 8 is gradually moved away from the well wall by the adjacent intercepting plate 10. The torsion spring 9 stores power. When the rotating plate 8 is in contact with the rotating sleeve 4, the rotating sleeve 4 blocks the outer side of the anchor claw 2. Then the process of releasing the oil pipe fixing in Example 2 is repeated.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A sand-control hydraulic anchor for oil development, comprising an anchor body (1), wherein the anchor body (1) is provided with a communicating annular cavity (101), the anchor body (1) is provided with circumferentially evenly distributed through grooves (102) all communicating with the annular cavity (101), an anchor claw (2) is slidably connected in a sealed manner within the through grooves (102), a first tension spring (21) is fixedly connected between the anchor claw (2) and the anchor body (1), and the anchor claw (2) is provided with locking teeth (201) for fixing the anchor body (1) to the well wall, characterized in that: The anchor claw (2) is fixedly connected to a limiting rod (202) that is in a sealed sliding connection with the anchor body (1). The anchor body (1) is provided with a ball (3) for squeezing the limiting rod (202) which is distributed circumferentially at equal intervals. The inner diameter of the ball (3) is equal to the inner diameter of the anchor body (1).

2. The sand-control hydraulic anchor for oil development according to claim 1, characterized in that: The length of the limiting rod (202) protruding into the anchor body (1) is less than the inner radius of the anchor body (1).

3. A sand-control hydraulic anchor for oil development according to claim 1, characterized in that: The anchor body (1) is rotatably connected to a rotating sleeve (4) for protecting the anchor claw (2). The rotating sleeve (4) is provided with circumferentially evenly spaced placement grooves (401) for adjacent anchor claws (2) to protrude. The annular cavity (101) is sealed and slidably connected to a pressure ring (5). The annular cavity (101) is filled with hydraulic oil. A second tension spring (51) is fixed between the pressure ring (5) and the anchor body (1). The anchor body (1) is provided with a guide groove (103). The anchor body (1) is sealed and slidably connected to a connecting rod (6) fixed to the pressure ring (5). The connecting rod (6) slides in the guide groove (103). The rotating sleeve (4) is provided with a sliding groove (403) for the connecting rod (6) to slide. The sliding groove (403) is provided with an arc-shaped part and a vertical part. The vertical part of the sliding groove (403) is connected to the adjacent placement groove (401).

4. A sand-control hydraulic anchor for oil development according to claim 3, characterized in that: The rotating sleeve (4) is provided with circumferentially spaced wave grooves (402) for placing adjacent teeth (201) to increase the contact area between the rotating sleeve (4) and the teeth (201).

5. A sand-control hydraulic anchor for oil development according to claim 4, characterized in that: The arc of the curved portion of the slide (403) projected onto the horizontal plane is greater than the arc of the through groove (102) projected onto the horizontal plane.

6. A sand-control hydraulic anchor for oil development according to claim 5, characterized in that: The annular cavity (101) is slidably connected to a push ring (7) located between the pressure ring (5) and the anchor claw (2). The anchor body (1) is provided with an L-shaped groove (104) that connects the annular cavity (101) and the guide groove (103). The connection between the L-shaped groove (104) and the annular cavity (101) is located between the pressure ring (5) and the push ring (7).

7. A sand-control hydraulic anchor for oil development according to claim 6, characterized in that: The distance between the pressure ring (5) and the push ring (7) is equal to the vertical height of the chute (403).

8. A sand-control hydraulic anchor for oil development according to claim 7, characterized in that: The rotating sleeve (4) is hinged to rotating plates (8) that are evenly spaced in the circumferential direction, and a torsion spring (9) is fixed between the rotating plates (8) and the rotating sleeve (4).

9. A sand-control hydraulic anchor for oil development according to claim 8, characterized in that: The anchor (1) is fixed with interceptor plates (10) that are circumferentially evenly distributed and located in adjacent placement slots (401), and the interceptor plates (10) are used to squeeze the adjacent rotating plates (8).

10. A sand-control hydraulic anchor for oil development according to claim 9, characterized in that: The interceptor plate (10) is provided with an inclined surface for guiding the rotating plate (8).

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