Support electric cylinder for well drilling

Abstract

The utility model discloses a support electric cylinder for well drilling. The support electric cylinder comprises a base, a driving system, a lead screw, a nut pair, a push rod, an inner guide sleeve and a connecting frame. The driving system is mounted on the base, and the lower end of the lead screw is mounted in the base and is in transmission connection with the driving system; the nut pair is arranged on the lead screw in a sleeving mode, the push rod is arranged on the lead screw in a sleeving mode, and the lower end of the push rod is connected to the nut pair. The lead screw is sleeved with the inner guide sleeve, the lower end of the inner guide sleeve is fixed to the base, the outer ring wall of the nut pair is matched with the inner ring wall of the inner guide sleeve, and the nut pair can slide up and down along the inner guide sleeve; a connecting frame is installed at the upper end of the push rod and located outside the inner guide sleeve, and a pulley is installed on the connecting frame. The electric cylinder serves as a derrick, and is simple in structure, stable, reliable and good in integrity.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drilling equipment, especially relates to a support electric cylinder for drilling. BACKGROUND

[0002] The traditional drilling adopts the mode of erecting a tower type derrick, and then drives the steel wire rope through the cooperation of the main winch and the traveling system to realize the lifting of the drilling tool, the whole set of equipment is large in size, many in parts, and needs a large manual cost for erection and disassembly; and the mode of using the winch to pull the steel wire rope to realize the lifting of the drilling tool has the risk of "upper collision and lower crushing".

[0003] In order to solve the inconvenience of the traditional derrick erection and disassembly, a telescopic derrick system appears, which mainly realizes the lifting of the drilling tool through a telescopic frame and a push oil cylinder, and the main principle is that the push oil cylinder drives the telescopic frame to extend and retract, and the telescopic frame carries the drilling tool to lift, compared with the traditional tower type derrick, the erection and disassembly of the whole set of system are much more convenient, but the integrity of the system is still not ideal. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a support electric cylinder for drilling, which is simple in structure and stable and reliable as a derrick, and is good in integrity.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme of a support electric cylinder for drilling, which comprises a base, a driving system, a lead screw, a nut pair, a push rod, an inner guide sleeve and a connecting frame.

[0006] The driving system is installed on the base, and the lower end of the lead screw is installed in the base and is in transmission connection with the driving system.

[0007] The nut pair is sleeved on the lead screw, the push rod is sleeved on the lead screw, and the lower end of the push rod is connected to the nut pair.

[0008] The inner guide sleeve is sleeved on the lead screw, the lower end of the inner guide sleeve is fixed on the base, the outer ring wall of the nut pair cooperates with the inner ring wall of the inner guide sleeve, and the nut pair can slide up and down along the inner guide sleeve.

[0009] The upper end of the push rod is installed with the connecting frame, the connecting frame is located outside the inner guide sleeve, and the connecting frame is installed with a pulley.

[0010] The support electric cylinder for drilling also comprises an outer guide sleeve, the outer guide sleeve is sleeved on the outer side of the inner guide sleeve, the upper end of the outer guide sleeve is connected with the connecting frame, and the inner wall of the outer guide sleeve and the outer wall of the inner guide sleeve are in sliding cooperation.

[0011] The inner guide sleeve and the outer guide sleeve are both rectangular guide sleeves, the inner guide rail is detachably installed at four outer sides of the inner guide sleeve, the outer guide rail is detachably installed at four inner sides of the outer guide sleeve, and the outer guide rail and the inner guide rail are in sliding fit.

[0012] The outer guide sleeve is provided with a sliding guide plate in the up-down direction on one side, and the sliding guide plate is used for up-down sliding of the drilling power head.

[0013] The driving system comprises a plurality of driving units, the plurality of driving units are uniformly installed on the base around the lead screw, and the driving gear of the driving unit and the driven gear installed at the lower end of the lead screw are in meshing.

[0014] The base is internally provided with a transmission cavity, and the driving gear and the transmission gear are both located in the transmission cavity.

[0015] The connecting frame is provided with two pulleys, and the two pulleys are located on the same vertical plane and on the same horizontal line.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The lead screw transmission has high lead accuracy, can satisfy the accurate adjustment of the up-down displacement of the drilling tool on the drilling site, realizes high-precision control, and the rigid cooperation of the lead screw and the nut pair can bear the axial impact of the sudden drop of the drilling tool in the drilling operation, so that the displacement deviation caused by the pressure fluctuation of the transmission hydraulic system is avoided.

[0018] 2. The inner guide sleeve is fixed to the base and cooperates with the nut pair to slide, effectively limits the radial deviation of the nut pair, ensures the linear motion track of the push rod, and improves the motion track stability; the sliding surface of the inner guide sleeve and the nut pair adopts wear-resistant alloy material, can reduce the wear caused by the downhole vibration, and prolongs the service life.

[0019] 3. The driving system is directly installed on the base to form a compact power unit, simplifies the on-site assembly process; the pulley is installed on the top end of the connecting frame of the push rod, can be linked with the drilling lock, and realizes the up-down stroke multiplication of the drilling tool.

[0020] 4. The integrated design of the lead screw, the nut pair and the inner guide sleeve forms a semi-closed structure, can block the invasion of the mud on the drilling site, reduces the risk of jamming; the sliding stroke of the inner guide sleeve and the nut pair is limited, and mechanical damage caused by overtravel can be avoided.

[0021] 5. The pure mechanical transmission structure does not need hydraulic oil or gas source, can reduce the maintenance cost and environmental risk, the nut pair, the inner guide sleeve and other components can be independently disassembled and replaced, and the maintenance downtime can be reduced.

[0022] The technical scheme of the utility model will be described in further detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the utility model.

[0024] Figure 2 It is a use state view of the utility model.

[0025] Figure 3 It is an internal structure schematic view of the utility model.

[0026] Figure 4 It is Figure 1 It is an internal structure schematic view after removing the outer guide sleeve.

[0027] Mark explanation:

[0028] 1 - base; 2 - drive system; 3 - screw rod;

[0029] 4 - nut pair; 5 - push rod; 6 - inner guide sleeve;

[0030] 7 - connecting frame; 8 - pulley; 9 - outer guide sleeve;

[0031] 10 - inner guide rail; 11 - outer guide rail; 12 - sliding guide plate;

[0032] 13 - driving gear; 14 - transmission gear; 15 - rig power head;

[0033] 16 - rope. DETAILED DESCRIPTION

[0034] As Figure 1 - Figure 4 shown, a support electric cylinder for drilling well includes: base 1, drive system 2, screw rod 3, nut pair 4, push rod 5, inner guide sleeve 6 and connecting frame 7; the drive system 2 is installed on the base 1, the lower end of the screw rod 3 is installed in the base 1 and is transmissionally connected with the drive system 2; the nut pair 4 is sleeved on the screw rod 3, the push rod 5 is sleeved on the screw rod 3, and the lower end of the push rod 5 is connected on the nut pair 4; the inner guide sleeve 6 is sleeved on the screw rod 3, the lower end of the inner guide sleeve 6 is fixed on the base 1, the outer ring wall of the nut pair 4 and the inner ring wall of the inner guide sleeve 6 are matched, and the nut pair 4 can slide up and down along the inner guide sleeve 6; the upper end of the push rod 5 is installed with the connecting frame 7, the connecting frame 7 is located outside the inner guide sleeve 6, and the connecting frame 7 is installed with the pulley 8.

[0035] In the embodiment, two pulleys 8 are installed on the connecting frame 7, and the two pulleys 8 are located on the same vertical plane and the same horizontal line.

[0036] Using two pulleys 8 compared to using one pulley 8 allows for a smaller pulley size. The two pulleys 8 are respectively located at both ends of the connecting frame 7.

[0037] In this embodiment, an outer guide sleeve 9 is also included. The outer guide sleeve 9 is sleeved on the outside of the inner guide sleeve 6, and the upper end of the outer guide sleeve 9 is connected to the connecting frame 7. The inner wall of the outer guide sleeve 9 and the outer wall of the inner guide sleeve 6 are in sliding fit. When the outer guide sleeve 9 is present, the outer ring wall of the nut assembly 4 and the inner ring wall of the inner guide sleeve 6 do not need to fit together. The fit between the nut assembly 4 and the inner guide sleeve 6 can be indirectly achieved through the outer guide sleeve 9.

[0038] It should be noted that the outer guide sleeve 9 can improve the radial rigidity of the overall electric cylinder and the stability of the electric cylinder's up and down movement. The outer guide sleeve 9 can seal the inner guide sleeve 6 to a certain extent. The integrated design of the lead screw 3, nut pair 4 and inner guide sleeve 6 forms a semi-closed structure, which can prevent mud and sand from entering the drilling site and reduce the risk of jamming.

[0039] In this embodiment, both the inner guide sleeve 6 and the outer guide sleeve 9 are rectangular guide sleeves. The inner guide sleeve 6 is detachably mounted with an inner guide rail 10 at its four outer edges, and the outer guide sleeve 9 is detachably mounted with an outer guide rail 11 at its four inner corners. The outer guide rail 11 and the inner guide rail 10 are in sliding fit.

[0040] It should be noted that both the inner guide sleeve 6 and the outer guide sleeve 9 are rectangular guide sleeves, which can effectively prevent the outer guide sleeve 9 from rotating relative to the inner guide sleeve 6. The inner guide rail 10 and the outer guide rail 11 can ensure the smooth relative sliding of the inner guide sleeve 6 and the outer guide sleeve 9, and reduce the installation difficulty of the inner guide sleeve 6 and the outer guide sleeve 9.

[0041] In this embodiment, a sliding guide plate 12 in the vertical direction is installed on one side of the outer guide sleeve 9. The sliding guide plate 12 is used for the vertical sliding of the drilling rig power head 15.

[0042] In this embodiment, the drive system 2 includes multiple drive units, which are evenly mounted on the base 1 around the lead screw 3. The driving gear 13 of the drive unit and the driven gear mounted on the lower end of the lead screw 3 mesh with each other.

[0043] It should be noted that the upper end of the lead screw 3 is a free end. Multiple drive units are evenly installed on the base 1 around the lead screw 3, which can make the power applied to the lead screw 3 uniform, reduce the radial runout problem of the lead screw 3, and make the rotation of the lead screw 3 more stable.

[0044] In this embodiment, the base 1 has a transmission cavity inside, and the driving gear 13 and the transmission gear 14 are both located inside the transmission cavity.

[0045] The drive unit includes a motor and a reducer. The output shaft of the reducer is connected to the drive gear 13. Both the drive gear 13 and the transmission gear 14 are located in the transmission cavity, which can effectively prevent mud and sand from entering the gear transmission and affecting the transmission effect. It can fully adapt to working environments with a lot of mud and sand.

[0046] In use, the drill power head 15 is installed on the sliding guide plate 12, and a rope 16 is used to connect the upper end of the drill power head 15. The other end of the rope 16 passes around the pulley 8, so that the rope body of the rope 16 is laid on the pulley 8, and the other end of the rope 16 is connected to the base 1. When the drive unit is started, the lead screw 3 rotates to drive the nut pair 4 to move upward. The nut pair 4 drives the push rod 5, and the push rod 5 drives the connecting frame 7 and the outer guide sleeve 9 to move upward. When the connecting frame 7 moves upward, it drives the pulley 8 upward. Under the action of the rope 16, the drill power head 15 slides upward along the sliding guide plate 12.

[0047] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A drilling support electric cylinder, characterized in that, include: Base, drive system, lead screw, nut pair, push rod, inner guide sleeve and connecting bracket; The drive system is mounted on the base, and the lower end of the lead screw is mounted inside the base and is connected to the drive system for transmission. The nut assembly is sleeved on the lead screw, the push rod is sleeved on the lead screw, and the lower end of the push rod is connected to the nut assembly; The inner guide sleeve is fitted onto the lead screw, and the lower end of the inner guide sleeve is fixed to the base. The nut pair cooperates with the inner guide sleeve, and the nut pair can slide up and down along the inner guide sleeve. The upper end of the push rod is equipped with a connecting frame, which is located outside the inner guide sleeve, and a pulley is installed on the connecting frame.

2. The drilling support electric cylinder according to claim 1, characterized in that, It also includes an outer guide sleeve, which is sleeved on the outside of the inner guide sleeve, and the upper end of the outer guide sleeve is connected to the connecting frame; the inner wall of the outer guide sleeve and the outer wall of the inner guide sleeve are in sliding fit.

3. The drilling support electric cylinder according to claim 2, characterized in that, Both the inner and outer guide sleeves are rectangular guide sleeves. The inner guide sleeve has an inner guide rail that can be detachably installed at the four outer edges, and the outer guide sleeve has an outer guide rail that can be detachably installed at the four inner corners. The outer guide rail and the inner guide rail are in sliding fit.

4. The drilling support electric cylinder according to claim 2 or 3, characterized in that, A sliding guide plate in the vertical direction is installed on one side of the outer guide sleeve. The sliding guide plate is used for the vertical sliding of the drilling rig power head.

5. The drilling support electric cylinder according to claim 1, characterized in that, The drive system includes multiple drive units, which are evenly mounted on a base around a lead screw. The driving gear of each drive unit meshes with the driven gear mounted on the lower end of the lead screw.

6. The drilling support electric cylinder according to claim 5, characterized in that, The base has a transmission cavity inside, and both the drive gear and the transmission gear are located inside the transmission cavity.

7. The drilling support electric cylinder according to claim 1, characterized in that, The connecting frame is equipped with two pulleys, which are located on the same vertical plane and on the same horizontal line.

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