Hydraulic sleeve shaping tool

Abstract

The utility model discloses a hydraulic casing pipe shaping tool, which comprises an anchor body, an anti-jacking anchoring mechanism, a hydraulic main pushing mechanism and a pear-shaped pipe expanding mechanism, the anti-jacking anchoring mechanism consists of a barrier strip, a baffle ring, an anchor fluke main body and an anchor fluke spring, and two anchoring casing pipes are arranged on the inner side of the anti-jacking anchoring mechanism; the anti-jacking anchoring mechanism bears reverse upward jacking force to provide power support in the hydraulic sleeve shaping process, the blocking strips are longitudinally inserted into the corresponding dovetail grooves to prevent the anchor fluke body from accidentally disengaging from the grooves, and the blocking rings are connected to the outer side of the anchor body through threads to limit longitudinal swing of the blocking strips. The pear-shaped pipe expanding mechanism is used for assisting the tool in sealing the internal pressure of the tool during hydraulic shaping and extruding the reducing sleeve to achieve the shaping purpose; the pipe expander is optimally designed, and the structure of the pipe expander is simplified, so that the pipe expanding mechanism is smoother in liquid diversion in drilling and well washing processes, and is easier to extrude into a reducing sleeve in a shaping process.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield casing shaping and repairing, in particular to a hydraulic casing shaping tool. Background Art

[0002] At present, there are three main methods of casing shaping at home and abroad: explosive shaping, mechanical impact shaping, and hydraulic shaping. Among them, explosive shaping technology has gradually faded out of the application field due to its cumbersome process, high cost, and unpredictable shaping effect. Mechanical impact shaping and hydraulic shaping are low in cost and easy to detect and evaluate. Generally, mechanical shaping requires the use of large-tonnage lifting equipment and drill pipes for impact shaping, while hydraulic shaping only requires ordinary high-pressure sealing oil pipes and high-pressure pumping equipment. The principles of mechanical shaping and hydraulic shaping are similar. Both use axial pressure to drive the shaper to squeeze the small-diameter casing to expand and restore to complete the casing repair. The difference is that the axial pressure of mechanical shaping comes from the weight of the pipe string and the momentum of the impact, while the axial pressure of hydraulic shaping comes from the high pressure inside the pump of the high-pressure hydraulic pumping equipment.

[0003] These two existing technologies also have the following problems when used: Mechanical shaping uses a slow-lift-fast-release method to impact shaping, and its shaping progress is too fast, resulting in an increased risk of drill jamming. The conventional hydraulic shaping tool anti-top anchoring mechanism uses conventional one-way anchoring hard metal as the bearing core component, and its ability to cut into the casing is limited, and it cannot bear the large-tonnage shaping upward force. In the hydraulic main push mechanism of the conventional hydraulic shaping tool, the matching design of the hydraulic piston and the center tube adopts a split-type step-by-step reduction of the effective area, which limits the design of the effective area of ​​the hydraulic main push, so that the shaping tool output shaping thrust is limited, and the overall strength and connection reliability of the tool are reduced. There is a risk of the tool falling off during frequent high-intensity shaping. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a hydraulic casing shaping tool. The anti-top anchoring mechanism bears the reverse top force and provides power support during the hydraulic casing shaping process. The baffle is longitudinally inserted into the corresponding dovetail groove to prevent the anchor claw body from accidentally falling out of the groove. The baffle ring is threadedly connected to the outer side of the anchor body to limit the longitudinal swing of the baffle. The hydraulic main pushing mechanism provides main pushing force support for the hydraulic casing shaping when subjected to the high pressure in the tool. The pear-shaped tube expansion mechanism helps the tool to seal the internal pressure of the tool during hydraulic shaping and squeezes out the reduced diameter casing to achieve the shaping purpose. By optimizing the design of the tube expander and simplifying the structure of the tube expander, the tube expansion mechanism can guide the liquid more smoothly during drilling and well washing, has higher strength, and is safer to shape. It is easier to squeeze into the reduced diameter casing during the shaping process, and the shaping and repairing casing effect is more significant.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: a hydraulic casing shaping tool, comprising an anchor body, an anti-top anchoring mechanism, a hydraulic main pushing mechanism and a pear-shaped expansion mechanism, wherein the anti-top anchoring mechanism is composed of a baffle, a baffle ring, an anchor claw body and an anchor claw spring, two anchor casings are arranged on the inner side of the anti-top anchoring mechanism, two side holes are arranged on the side surface of the anchor casing, a center hole is arranged on the inner side of the inner wall of the anchor body, the side hole is connected to the center hole, an anchor claw body is installed on the inner side of the side hole, the two side holes are arranged with circumferential phase staggered, a longitudinal dovetail groove is milled on the surface of the side hole, the baffle is longitudinally inserted and installed on the inner side of the corresponding longitudinal dovetail groove, the baffle ring is connected to the outer side of the anchor body by a thread, one end of the anchor body is provided with an internal thread connected to the oil pipe, the other end of the anchor body is provided with an external thread connected to the hydraulic main pushing mechanism, and the hydraulic main pushing mechanism is composed of the upper The invention comprises a joint, a starting nail, a piston body, a positioning locking block, a locking cap, a fixed piston, a center tube, a connecting tube and a dead piston. The upper joint is threadedly connected to the center tube, and the piston body is hung with the upper joint through the starting nail. The cross section of the positioning locking block is two semicircles that are stuck on the inner side of the groove corresponding to the surface of the center tube. The locking cap and the fixed piston are sleeved on the outer side of the center tube, and the locking cap and the fixed piston are located in the inner cavity of the piston body. The locking cap is threadedly connected to the fixed piston, and a positioning locking block is installed on the inner side of the locking cap to limit the position. The positioning locking block, the locking cap and the fixed piston are fixed in the axial position relative to the center tube. The dead piston is threadedly connected to one end of the center tube, and the connecting tube is threadedly connected to one end of the piston body. The pear-shaped expansion mechanism is composed of a check valve, a pear-shaped expander and a valve ball. The check valve is threadedly installed in the inner cavity of one end of the pear-shaped expander, and the valve ball is installed on the inner side of the sealing cone of the check valve.

[0006] As a preferred technical solution of the utility model, a force guide cone is provided at one end of the pear-shaped expander, and a longitudinal spiral guide groove is provided on the outer side of the pear-shaped expander, and the outer diameter of the longitudinal spiral guide groove increases step by step.

[0007] As a preferred technical solution of the utility model, the anti-top anchoring mechanism is located on the left side of the shaping tool, the hydraulic main pushing mechanism is located in the middle of the shaping tool, and the pear-shaped expansion tube mechanism is located on the right side of the shaping tool.

[0008] As a preferred technical solution of the utility model, the anti-top anchoring force of the anti-top anchoring mechanism is borne by the unidirectionally tilted high-hardness alloy teeth, and the unidirectionally tilted high-hardness alloy teeth forcefully cut into the anchoring sleeve.

[0009] As a preferred technical solution of the utility model, the dead piston, the center tube and the connecting tube are sealed and connected.

[0010] As an optimal technical solution of the utility model, the piston body, positioning lock block, lock cap and fixed piston are arranged in uniform sizes, and a multi-stage equivalent hydraulic piston is arranged on the surface of the central tube, and the multi-stage equivalent hydraulic piston shares the same central tube.

[0011] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0012] 1. The anti-top anchoring mechanism bears the reverse top force and provides power support during the hydraulic casing shaping process. The retaining bar is longitudinally inserted into the corresponding dovetail groove to prevent the anchor claw body from accidentally falling out of the groove. The retaining ring is threadedly connected to the outside of the anchor body to limit the longitudinal swing of the retaining bar. When the hydraulic main push mechanism is subjected to the high pressure in the tool, it provides the main driving force support for the hydraulic casing shaping. The pear-shaped expansion mechanism helps the tool to seal the internal pressure of the tool during hydraulic shaping and squeeze the reduced diameter casing to achieve the shaping purpose; by optimizing the design of the expander and simplifying the structure of the expander, the expansion mechanism makes the liquid diversion smoother during drilling and well washing, the strength is higher, the shaping is safer, and it is easier to squeeze into the reduced diameter casing during the shaping process, and the shaping and repairing casing effect is more significant.

[0013] 2. Hydraulic shaping is adopted, and the shaping progress is stable, the shaping effect is good, and the risk of drill sticking is reduced; two sets of anchoring casings with staggered phases are cut into the inner wall of the casing by unidirectional tilted high-hard alloy teeth to bear the shaping upper force, thereby improving the stability of the anchoring casing; through the multi-stage equivalent hydraulic piston sharing the same center tube, the hydraulic main push mechanism can freely set the output axial thrust, and the effective hydraulic action area does not need to decrease step by step, and is not affected by the number of piston stages. The tool structure is simpler and the strength is higher. The size of the shaping thrust can be freely adjusted to meet the needs of the shaping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the planing structure of the utility model in the assembly standby state.

[0015] Figure 2 It is a schematic diagram of the planing structure in the hydraulic shaping state of the utility model.

[0016] Among them: 1. Anchor body; 2. Baffle; 3. Baffle ring; 4. Anchor claw body; 5. Anchor claw spring; 6. Upper joint; 7. Start pin; 8. Piston body; 9. Positioning lock block; 10. Lock cap; 11. Fixed piston; 12. Center tube; 13. Connecting tube; 14. Dead piston; 15. Check valve; 16. Pear-shaped expander; 17. Valve ball. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0018] Example, assembly standby state, please refer to Figure 1 As shown, the utility model provides a hydraulic casing shaping tool, including an anchor body 1, an anti-top anchoring mechanism, a hydraulic main pushing mechanism and a pear-shaped expansion mechanism. The anti-top anchoring mechanism is composed of a baffle 2, a baffle ring 3, an anchor claw body 4 and an anchor claw spring 5. Two anchor casings are arranged on the inner side of the anti-top anchoring mechanism. Two side holes are opened on the side surface of the anchor casing. A central hole is opened on the inner side of the inner wall of the anchor body 1. The side hole is connected to the central hole. The anchor claw body 4 is installed on the inner side of the side hole. The two side holes are arranged with staggered circumferential phases. A longitudinal dovetail groove is milled on the surface of the side hole. The baffle 2 is inserted longitudinally and installed on the The inner side of the corresponding longitudinal dovetail groove, the retaining ring 3 is connected to the outer side of the anchor body 1 through a thread, one end of the anchor body 1 is provided with an internal thread connected to the oil pipe, and the other end of the anchor body 1 is provided with an external thread connected to the hydraulic main push mechanism, the hydraulic main push mechanism is composed of an upper joint 6, a starting nail 7, a piston body 8, a positioning lock block 9, a locking cap 10, a fixed piston 11, a center tube 12, a connecting tube 13, and a dead piston 14. The upper joint 6 is threadedly connected to the center tube 12, the piston body 8 is connected to the upper joint 6 through the starting nail 7, and the cross section of the positioning lock block 9 is two semicircular recesses corresponding to the surface of the center tube 12. On the inner side of the groove, the lock cap 10 and the fixed piston 11 are sleeved on the outer side of the central tube 12. The lock cap 10 and the fixed piston 11 are located in the inner cavity of the piston body 8. The lock cap 10 is threadedly connected to the fixed piston 11. A positioning lock block 9 is installed on the inner side of the lock cap 10. The positioning lock block 9, the lock cap 10, and the fixed piston 11 are fixed in the axial position relative to the central tube 12. The dead piston 14 is threadedly connected to one end of the central tube 12, and the connecting tube 13 is threadedly connected to one end of the piston body 8. The pear-shaped expansion mechanism is composed of a check valve 15, a pear-shaped expansion device 16, and a valve ball 17. The check valve 15 is threadedly installed on The inner cavity at one end of the pear-shaped expander 16 and the valve ball 17 are installed on the inner side of the sealing cone surface of the check valve 15; the anti-top anchoring mechanism bears the reverse top force to provide power support during the hydraulic casing shaping process, the baffle 2 is longitudinally inserted into the corresponding dovetail groove to prevent the anchor claw body 4 from accidentally falling out of the groove, and the baffle ring 3 is threadedly connected to the outer side of the anchor body 1 to limit the longitudinal swing of the baffle 2. When the hydraulic main push mechanism is subjected to the high pressure in the tool, it provides the main driving force support for the hydraulic casing shaping. The pear-shaped expansion mechanism helps the tool to seal the internal pressure of the tool during hydraulic shaping and squeezes the reduced diameter casing to achieve the shaping purpose.

[0019] like Figure 1As shown, a force guide cone is provided at one end of the pear-shaped expander 16, and a longitudinal spiral guide groove is provided on the outer side of the pear-shaped expander 16, and the outer diameter of the longitudinal spiral guide groove increases step by step; by optimizing the design of the expander and simplifying the structure of the expander, the expansion mechanism can guide the liquid more smoothly during drilling and well washing, and the strength is higher, the shaping is safer, and it is easier to squeeze into the reduced diameter casing during the shaping process, and the shaping and repairing effect of the casing is more significant.

[0020] like Figure 1 As shown, the anti-top anchoring mechanism is located on the left side of the shaping tool, the hydraulic main pushing mechanism is located in the middle of the shaping tool, and the pear-shaped expansion tube mechanism is located on the right side of the shaping tool; by adopting hydraulic shaping, the shaping progress is stable, the shaping effect is good, and the risk of drill sticking is reduced.

[0021] like Figure 1 As shown, the anti-top anchoring force of the anti-top anchoring mechanism is borne by the unidirectionally tilted high-hard alloy teeth, which forcefully cut into the anchoring sleeve; the two sets of anchoring sleeves with staggered phases are borne by the unidirectionally tilted high-hard alloy teeth that cut into the inner wall of the sleeve to bear the shaping top force, thereby improving the stability of the anchoring sleeve.

[0022] like Figure 1 As shown, the dead piston 14, the center tube 12 and the connecting tube 13 are sealed and connected; through the dead piston 14, the center tube 12 and the connecting tube 13 are sealed and connected, the sealing performance of the center tube 12, the dead piston 14 and the connecting tube 13 is better.

[0023] like Figure 1 As shown, the piston body 8, the positioning lock block 9, the lock cap 10, and the fixed piston 11 are set with uniform dimensions, and a multi-stage equivalent hydraulic piston is arranged on the surface of the center tube 12, and the multi-stage equivalent hydraulic pistons share the same center tube 12; by using the multi-stage equivalent hydraulic pistons to share the same center tube 12, the hydraulic main push mechanism can freely set the output axial thrust, and the effective hydraulic action area does not need to decrease step by step and is not affected by the number of piston stages. The tool structure is simpler and the strength is higher, and the size of the shaping thrust can be freely adjusted to meet the needs of the shaping process.

[0024] Specific working principle:

[0025] For hydraulic shaping status, please refer to Figure 2As shown, the tool is lowered into the well with the pipe string to the place where the casing is deformed and reduced in diameter. The pear-shaped expander 16 encounters resistance, and a certain drilling pressure is applied to the pipe string. The valve ball 17 is inserted into the oil pipe and sits on the sealing cone surface of the check valve 15 to form a seal. The internal pressure of the transmission oil pipe increases, and the anchor claw body 4 is radially extended under the driving of the internal pressure of the tool. The one-way tilted hard alloy teeth embedded in the anchor claw body 4 cut into the inner wall of the casing, which can withstand a sufficiently high hydraulic shaping reaction upward force. At the same time, the multi-stage linkage piston body 8 moves downward under the action of the internal pressure. The inner wall of the casing is radially squeezed by the piston body 8, the connecting tube 13 and the pear-shaped expander 16, and the inner wall of the casing is radially squeezed. The reverse lifting force on the central tube 12 is overcome by the radial expansion of the anchor claw body 4 anchoring the casing. The central tube 12 remains relatively still. The multi-stage piston body 8, the connecting tube 13 and the pear-shaped expander 16 are driven by the internal pressure to move downward continuously, and the inner wall of the casing is radially squeezed continuously until the stroke is exhausted and the inner pressure of the oil pipe suddenly rises sharply. Then this section of the deformed casing is completely squeezed by the pear-shaped expander 16. After the deformation is passed, the tubing is lifted up to normal load after the tubing is depressurized, and the same drilling pressure is applied to the tubing column again to pressurize and reset the piston body 8, the connecting tube 13, and the pear-shaped expander 16. If the resistance point is significantly deepened, the last hydraulic shaping is effective. Otherwise, at the original resistance point, the internal pressure of the tubing is slowly increased again to squeeze and expand the casing deformation point or segment. If the original deformation point is successfully shaped, the tubing is deepened, the same drilling pressure is applied to pressurize and reset the piston body 8, the connecting tube 13, and the pear-shaped expander 16, and the tubing is slowly lifted. The internal pressure of the pipe continues to squeeze, expand and reshape the deformation points or sections of the casing to normal, thereby continuously deepening the shaping of the pipe string to complete the deformation and shrinkage points or sections of the casing. The shaping of the expander of this level is completed, and the shaping pipe string of this level is proposed, and the pear-shaped expander 16 of a larger outer diameter size is replaced to continue to reshape all the deformation and shrinkage points or sections of the casing. In this way, the outer diameter of the pear-shaped expander 16 is continuously expanded until all the deformation points or sections of the pear-shaped expander 16 of the largest outer diameter size are also completely shaped, and the casing shaping of this well is completely successful.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic casing shaping tool, comprising an anchor body (1), an anti-top anchoring mechanism, a hydraulic main pushing mechanism and a pear-shaped expansion mechanism, characterized in that: The anti-top anchoring mechanism is composed of a retaining bar (2), a retaining ring (3), an anchor claw body (4), and an anchor claw spring (5). Two anchor sleeves are arranged on the inner side of the anti-top anchoring mechanism. Two side holes are arranged on the side surface of the anchor sleeve. A central hole is arranged on the inner side of the inner wall of the anchor body (1). The side hole is connected to the central hole. The anchor claw body (4) is installed on the inner side of the side hole. The two side holes are arranged with staggered circumferential phases. The surface of the side hole is milled with a longitudinal dovetail groove. The retaining bar (2) is longitudinally inserted and installed in the corresponding longitudinal dovetail groove. On the inner side of the tail groove, the retaining ring (3) is connected to the outer side of the anchor body (1) through a thread. One end of the anchor body (1) is provided with an internal thread connected to the oil pipe, and the other end of the anchor body (1) is provided with an external thread connected to the hydraulic main push mechanism. The hydraulic main push mechanism consists of an upper joint (6), a starting pin (7), a piston body (8), a positioning lock block (9), a lock cap (10), a fixed piston (11), a center tube (12), a connecting tube (13), and a dead piston (14). The upper joint (6) is threadedly connected to the center tube (12). The piston body (8) is connected to the upper joint (6) by a starting pin (7). The cross section of the positioning lock block (9) is two semicircular sections that are clamped on the inner side of the groove corresponding to the surface of the center tube (12). The locking cap (10) and the fixed piston (11) are sleeved on the outer side of the center tube (12). The locking cap (10) and the fixed piston (11) are located in the inner cavity of the piston body (8). The locking cap (10) and the fixed piston (11) are threadedly connected. The inner side of the locking cap (10) is limitedly installed with a positioning lock block (9). The positioning lock block (9) , a locking cap (10), and a fixed piston (11) are fixed in axial position relative to the center tube (12); the dead piston (14) is threadedly connected to one end of the center tube (12); the connecting tube (13) is threadedly connected to one end of the piston body (8); the pear-shaped tube expansion mechanism is composed of a check valve (15), a pear-shaped tube expander (16), and a valve ball (17); the check valve (15) is threadedly installed in the inner cavity of one end of the pear-shaped tube expander (16); and the valve ball (17) is installed on the inner side of the sealing cone surface of the check valve (15).

2. A hydraulic casing shaping tool according to claim 1, characterized in that: A force distribution guide cone is provided at one end of the pear-shaped tube expander (16), and a longitudinal spiral guide groove is provided on the outside of the pear-shaped tube expander (16), wherein the outer diameter of the longitudinal spiral guide groove increases step by step.

3. A hydraulic casing shaping tool according to claim 1, characterized in that: The anti-top anchoring mechanism is located on the left side of the shaping tool, the hydraulic main pushing mechanism is located in the middle of the shaping tool, and the pear-shaped expansion tube mechanism is located on the right side of the shaping tool.

4. A hydraulic casing shaping tool according to claim 1, characterized in that: The anti-top anchoring force of the anti-top anchoring mechanism is carried by the high-hardness alloy teeth that tilt in one direction, and the high-hardness alloy teeth that tilt in one direction forcefully cut into the anchoring sleeve.

5. A hydraulic casing shaping tool according to claim 1, characterized in that: The dead piston (14), the central tube (12) and the connecting tube (13) are sealedly connected.

6. A hydraulic casing shaping tool according to claim 1, characterized in that: The piston body (8), the positioning lock block (9), the lock cap (10), and the fixed piston (11) are arranged in uniform sizes, and a plurality of equivalent hydraulic pistons are arranged on the surface of the central tube (12), and the plurality of equivalent hydraulic pistons share the same central tube (12).

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