CN206707664U - A kind of screw rod hydraulic returnable fishing tool - Google Patents

Abstract

The utility model relates to the technical field of oil and natural gas salvage, in particular to a tool for salvaging the deformed fish head of a drilling tool. The technical solution is: the diverter plate is provided with two diversion channels and the center channel; the plugging screen is fixedly installed in the center channel of the diverter plate; the rotor is provided with a center channel, and the lower end is connected with the flexible universal joint; the upper end of the upper sleeve is connected Flexible universal joint connection, the lower end is installed on the bearing group; the outer end of the positioning sleeve is connected with the cylinder wall through threads; the central spear has a central flow channel, the upper end is provided with a spline, and the lower end is provided with a tapered step and two branch channels; There are two safety pins in the shape of stepped shafts; the slips in total have four petals in the shape of an arc; the cylindrical grinding shoe has an annular flow channel, the upper end and the central spear are connected by threads, and the lower end is conical. The utility model can not only unclog and salvage the fallen fish with severe sand sinking, but also carry out retractable salvage on the fish head with complicated deformation, so as to improve the success rate of salvage and reduce the accident loss at the same time.

Description

A screw hydraulic retractable fishing tool

technical field

The utility model relates to the technical field of oil and natural gas salvage, in particular to a tool for salvaging a deformed fish head of a drilling tool.

Background technique

Drilling tools are subjected to complex stresses such as tension, compression, bending, and torsion during long-term work, and frequent alternating stresses are generated in some areas, and drilling tools are prone to fatigue damage and fall to the bottom of the well. The harsh environment causes the head of the fish to be corroded and deformed; at the same time, due to the failure of the brakes and the failure of the wellhead tools, the drill string is suddenly drilled, the drilling tool is broken, and the head of the fish is easily deformed; therefore, traditional fishing tools are difficult to deal with A fishing accident involving complex deformation of the head of a fallen fish. On the other hand, due to the completion of high-inclination wells and horizontal wells, the sand sedimentation phenomenon in the entire well section will be particularly serious, which has caused great difficulties in fishing for fish. In terms of fishing equipment, traditional wellhead power equipment cannot maximize the transmission of torque and pulling force to the position of fish in highly deviated wells, and the friction between the pipe string and casing will consume a large part of the power. Therefore, conventional vertical well fishing tools are used to solve the problem. Card measures are basically difficult to implement.

Based on the above-mentioned technical background, the utility model proposes a screw hydraulic retractable fishing tool, which is used for fishing tools with corrosion and deformation of heads of complex falling fish.

Utility model content

The purpose of the utility model is: in order to meet the technical requirements of the drilling tool for fishing complex fallen fish head corroded and deformed, and at the same time realize the technical requirements that the fishing tool can be withdrawn safely when the fishing fails, to provide a screw hydraulic retractable fishing tool.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a screw hydraulic retractable fishing tool, which is composed of an upper joint, a plugging screen, a diverter plate, a rotor, a stator, a flexible universal joint, a positioning sleeve, an upper Sleeve, bearing group, push piston, safety pin, central lance, spring, lower sleeve, slips, cylindrical grinding shoe, wall hook, blocking ball and cylinder wall, characterized in that the diverter plate is cylindrical , set up two diversion channels and a central flow channel, the diversion plate and the upper joint are connected through threads; the upper joint is provided with an anti-falling step, the lower end of the upper joint is connected with the cylinder wall, and the plugging screen is fixedly installed on the center flow of the diversion plate The stator is fixedly installed on the cylinder wall; the rotor is provided with a central flow channel, the upper end of the rotor is installed on the anti-falling step of the upper joint, and the lower end is connected with the flexible universal joint; the bearing group is installed on the middle step of the cylinder wall; The upper end of the upper sleeve is connected with the flexible universal joint, and the lower end is installed on the bearing group. The upper end of the upper sleeve is provided with two combined flow channels, and the lower port is provided with spline grooves. The upper sleeve is symmetrically provided with hydraulic flow channels in the middle. Piston channels and safety pin holes are symmetrically opened below the hydraulic channel of the upper sleeve; the outer end of the positioning sleeve is connected to the cylinder wall through threads, and a tapered step is set at the lower end, and the positioning sleeve is installed on the tapered outer end surface of the upper sleeve The push piston is installed in the piston channel of the upper sleeve; the center lance is provided with a central flow channel, and the upper end is provided with a spline, and the spline of the center lance is installed in the spline groove of the upper sleeve, and the center lance A safety pin hole is set at the upper end, a tapered step is set at the lower end and two flow channels are opened; two safety pins are in the shape of stepped shafts, the large diameter end is installed in the safety pin hole of the central lance, and the small diameter end is installed in the upper In the safety pin hole of the sleeve; the upper end of the lower sleeve is threadedly connected with the upper sleeve, and the lower end is provided with a groove; the slips have four petals in an arc shape, and the upper end of the slips is connected with the spring and installed on the lower sleeve In the groove, the lower end of the slips is provided with slip teeth, which are installed on the tapered step of the central lance; the cylindrical grinding shoe is provided with an annular flow channel, and the upper end and the central lance are connected by threads, and the lower end is conical. The middle part of the cylindrical milling shoe is provided with milling teeth; the wall hook is connected with the cylinder wall through threads.

The beneficial effects of the utility model are: (1) the utility model adopts the screw rod to provide power for the cylindrical grinding shoe, which can effectively solve the problem of insufficient power in the mine; Circular flushing of the inner and outer chambers of the fallen fish can realize the salvage of the fish in the high-inclination wells with serious sedimentation. Carry out salvage; (4) when the utility model fails in salvage, the tool can be withdrawn from the cavity of the fish by simple operation.

Description of drawings

Fig. 1 is a structural schematic diagram of a screw hydraulic retractable fishing tool of the present invention;

Fig. 2 is a structural schematic diagram of a screw hydraulically retractable fishing tool of the utility model for safely withdrawing;

Fig. 3 is an enlarged view at B of a screw hydraulic retractable fishing tool of the present invention;

Fig. 4 is an A-A view of a screw hydraulic retractable fishing tool of the present invention;

In the figure 1. Upper joint, 2. Blocking screen, 3. Distributor plate, 4. Rotor, 5. Stator, 6. Flexible universal joint, 7. Positioning sleeve, 8. Upper sleeve, 9. Bearing group , 10. Push piston, 11. Safety pin, 12. Center spear, 13. Spring, 14. Lower sleeve, 15. Slips, 16. Cylindrical grinding shoe, 17. Wall hook, 18. Blocking ball, 19. Cylinder wall.

detailed description

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a screw hydraulic retractable fishing tool of the present invention is composed of an upper joint 1, a plugging screen 2, a diverter plate 3, a rotor 4, a stator 5, a Universal joint 6, positioning sleeve 7, upper sleeve 8, bearing group 9, push piston 10, safety pin 11, center spear 12, spring 13, lower sleeve 14, slips 15, cylindrical grinding shoe 16 , wall hook 17, plugging ball 18 and cylinder wall 19, it is characterized in that: diverter plate 3 is cylindrical, offers two diverter channels and center channel, diverter channel is mainly the drilling fluid driving screw rotation channel, center channel The retractable action is mainly realized through high-pressure drilling fluid. The diverter plate 3 is connected with the upper joint 1 through threads; Fixedly installed in the center channel of the diverter plate 3, the plugging screen 2 mainly allows the drilling fluid to pass through both ends of the screw to prevent the drilling fluid from passing through the center channel; the stator 5 is fixedly installed on the cylinder wall 19; the rotor 4 is provided with a center flow channel Road, the upper end of the rotor 4 is installed on the anti-drop step of the upper joint 1 to prevent the rotor 4 from falling, and the lower end is connected with the flexible universal joint 6, and the flexible universal joint 6 realizes the transmission of torque; the bearing group 9 is installed On the middle step of the cylinder wall 19, the bearing group 9 ensures the rotation of the drilling tool while balancing the axial force; the upper end of the upper sleeve 8 is connected with the flexible universal joint 6, and the lower end is installed on the bearing group 9, and the upper end Two converging flow channels are provided, spline grooves are provided at the lower port, hydraulic flow channels are symmetrically provided in the middle of the upper sleeve 8, piston passages and safety pin holes are symmetrically provided below the hydraulic flow channels of the upper sleeve 8, and the piston and safety pin guarantee tools Safe and reversible; the outer end of the positioning sleeve 7 is threadedly connected to the cylinder wall 19, and the lower end is provided with a tapered step. The positioning sleeve 7 is installed on the tapered outer end surface of the upper sleeve 8, and the positioning sleeve 7 prevents the upper sleeve from The cylinder 8 moves axially; the push piston 10 is installed in the piston channel of the upper sleeve 8; In the spline groove, the spline cooperates with the spline groove of the upper sleeve 8 to realize torque transmission while ensuring the safety and reversibility of the central lance. The upper end of the central lance 12 is provided with a safety pin hole, and the lower end is provided with a tapered step and Set up two flow channels; two safety pins 11 are in the shape of stepped shafts, the large-diameter end is installed in the safety pin hole of the central lance 12, and the small-diameter end is installed in the safety pin hole of the upper sleeve 8; the lower sleeve The upper end of the barrel 14 is threadedly connected with the upper sleeve 8, and the lower end is provided with a groove; the slips 15 have four petals in an arc shape, and the upper end of the slips 15 is connected with the spring 13 and installed in the groove of the lower sleeve 14 , the lower end of the slips 15 is provided with slip teeth, and the slip teeth eat into the inner cavity of the fallen fish to complete the salvage of the fallen fish, and are installed on the conical steps of the central spear 12; The annular flow channel can circulate the sediment in the inner cavity of the fish. The upper end and the central spear 12 are connected by threads, and the lower end is conical, so as to realize the shaping of the fish whose head is deformed. The middle part of the cylindrical grinding shoe 16 Set the grinding and milling teeth to realize the falling fish Fish head burrs and corroded iron filings are cleaned; the wall hook 17 is connected with the cylinder wall 19 by threads.

The working principle of the utility model: send the utility model to the top of the falling fish. If the top of the fish is buried by sand, start the pump to circulate the drilling fluid until the top of the fish is exposed. The stator 5 rotates, and the stator 4 drives the upper sleeve 8 to rotate through the flexible universal joint 6, and the upper sleeve 8 drives the central lance 12 to rotate through the spline; when the drill string is lowered, the rotating wall hook 17 will catch fish falling close to the well wall. Uprighting, the cylindrical grinding shoe 16 conical part first trims the deformed fish head, and then cleans the burrs, iron filings and sundries on the fish head through the grinding and milling teeth of the cylindrical grinding shoe 16 to ensure that the fish head is as good as possible After regularization, continue down the drill string, slips 15 enter the inner cavity of the fish head, and the drilling fluid flushes the annulus of the wellbore and most of the sand in the inner cavity of the fish, reducing the weight of the fish and releasing force; lift the drill string, slips 15 The 15 slips are eaten into the inner cavity of the fish, and the drill string is continuously lifted until the fish is taken out.

Safe and returnable working principle: In case of special circumstances where the salvage is unsuccessful or the fish needs to be released, the plugging ball 18 is put in and the high-pressure drilling fluid is passed through. On the sieve 2, continue to press, the plugging ball 18 pushes the plugging screen 2 until it slips off, and the plugging screen 2 finally slides down to the port of the grinding shoe and is retracted. Pushed by the high-pressure drilling fluid, the plugging ball 18 moves to the center spear 12 On the seat, continue to pressurize, and the high-pressure drilling fluid pushes the piston 10 downward through the hydraulic flow channel of the upper sleeve 8 to cut off the safety pin 11 and push the central lance 12 downward, the lower end cone of the central lance 12 is separated from the slip 5, and the slip 5. When the supporting force is lost, it is automatically retracted under the action of the spring 13, the drill string is lifted up, and the fishing tool is safely withdrawn.

Claims (1)

1. it is by top connection (1), closure sieve (2), shunting disk (3), rotor (4), fixed a kind of screw rod hydraulic returnable fishing tool Sub (5), flexible universal joint (6), abutment sleeve (7), upper bush (8), bearing group (9), promotion piston (10), safety pin (11), center shaft (12), spring (13), lower sleeve (14), slips (15), column type junk mill (16), wall hook (17), ball sealer (18) formed with barrel (19), it is characterised in that：Shunting disk (3) is cylindrical, opens up two runners and center flow channels, described point Flow table (3) is connected through a screw thread with top connection (1)；Top connection (1) sets anti-lost step, top connection (1) lower end and barrel (19) connect, closure sieve (2) is fixedly installed in the shunting disk (3) center flow channels；Stator (5) is fixedly installed in barrel (19) On；Rotor (4) opens up center flow channels, and rotor (4) upper end is installed on the anti-lost step of the top connection (1), lower end with Flexible universal joint (6) connects；Bearing group (9) is installed on barrel (19) middle bench；Upper bush (8) upper end and flexible universal joint (6) connecting, lower end is installed in bearing group (9), and upper bush (8) upper end opens up two interflow roads, and lower port opens up spline, The upper bush (8) symmetrically opens up hydraulic pressure runner at middle part, and symmetrically piston channel is opened up below upper bush (8) the hydraulic pressure runner With safety pin nail；Abutment sleeve (7) outer end is connected through a screw thread with barrel (19), and lower end sets type conical bench, the positioning Sleeve (7) is installed on upper bush (8) tapered outer ends face；Piston (10) is promoted to be installed in the upper bush (8) piston channel； Center shaft (12) opens up center flow channels, and upper end sets spline, and the center shaft spline is installed on upper bush (8) described spline In groove, center shaft (12) upper end opens up safety pin nail, and lower end sets type conical bench and opens up two runners；Safety pin Follow closely (11) totally two be in ladder shaft-like, bigger diameter end is installed in the safety pin nail of the center shaft (12), miner diameter end install In in the upper bush (8) safety pin nail；Lower sleeve (14) upper end is connected through a screw thread with upper bush (8), and lower end opens up recessed Groove；Pintongs is in arc-shaped to slips (15) altogether, and slips (15) upper end is connected with spring (13), is installed on the lower sleeve (14) In groove, slips (15) lower end sets slip insert, is installed in center shaft (12) type conical bench；Column type junk mill (16) annular channel is opened up, upper end is connected through a screw thread with center shaft (12), and lower end is in coniform, the column type junk mill (16) Middle part sets milling tooth；Wall hook (17) is connected through a screw thread with barrel (19).