CN214944120U - Hydraulic control type drill rod dynamic anchor - Google Patents
Hydraulic control type drill rod dynamic anchor Download PDFInfo
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- CN214944120U CN214944120U CN202120977780.0U CN202120977780U CN214944120U CN 214944120 U CN214944120 U CN 214944120U CN 202120977780 U CN202120977780 U CN 202120977780U CN 214944120 U CN214944120 U CN 214944120U
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Abstract
A hydraulic control type dynamic anchor for drill rod is composed of upper joint, central axle, anchor block holder, tooth holder frame, piston sleeve and hydraulic cylinder sleeve, which are fixed to upper joint to form main body of anchor, hydraulic cylinder sleeve and piston sleeve to form hydraulic cylinder structure, tooth holder frame fixed to end of piston sleeve and sleeved to main body of anchor, anchor block inlaid on side wall of anchor block, hydraulic cylinder sleeve and piston sleeve matched to drive anchor block, and hydraulic pressure unit for driving anchor block to move up, which features that when the anchor block is driven by hydraulic pressure, the anchor block is radially expanded and anchored to the wall of casing tube to provide drawing supporting point for hydraulic booster, and said hydraulic booster can be used in conjunction with hydraulic booster for synchronous drawing and anchoring, and when the drawing stroke is reset and pressure is released, and when the drawing booster and drill rod are lifted, it is synchronously matched to carry out periodic dynamic anchoring, the pipe column fishing efficiency and the fishing effect are improved.
Description
Technical Field
The utility model relates to an anchor, in particular to liquid accuse formula drilling rod developments anchor.
Background
In offshore oil field exploitation, a transfer injection measure needs to be implemented on part of low-yield oil wells in the middle and later production periods, namely, the oil wells are transferred from a crude oil production well to a water or polymer injection well so as to optimize and adjust well pattern layout and improve oil extraction production efficiency. At present, limited by special production environment of offshore oil production and specific structural function of an offshore oil production platform, rated load and ultimate load of a workover rig configured on the oil production platform are generally relatively low, oil and gas wells of the offshore oil field are cluster distributed wells including directional wells, extended reach wells, horizontal wells and the like, when a wellhead is subjected to heavy lifting and salvage, a salvage pipe column and the inner wall of a sleeve pipe are in multi-point contact, so that the friction resistance is reacted on the salvage pipe column, the conventional matched workover rig sometimes cannot directly complete salvage and lift, the back-off operation effect is poor, the salvage or unfreezing success rate is low, meanwhile, the lifting capacity of the workover rig and the shock resistance of the oil production platform further limit the application of the high-force upward-hitting operation method of the salvage jar knocker, and the replacement and salvage of the pipe column in the offshore oil production platform have low efficiency, The problem of poor effect has become an obvious restriction technology link of offshore oil field production, therefore, it is necessary to research and develop an auxiliary boosting system for offshore oil field pipe column replacement and salvage and a matching device thereof, and the auxiliary boosting system can be popularized and applied to workover operations of land oil fields, and can boost salvage and clamp, improve salvage efficiency and salvage effect, and meet the oil field production requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a hydraulically controlled drilling rod developments anchor, supporting being applied to a booster is salvaged to tubular column in the pit, provides helping hand location support pivot for the booster.
A hydraulically controlled drill pipe dynamic anchor comprising: top connection, center pin, anchor tooth piece, anchor tooth seat, tooth seat frame, piston cover and hydraulic cylinder cover, the center pin with top connection fixed connection constitutes shaft-like anchor main part the both ends of anchor main part are provided with connection structure respectively for be connected with drilling tool drilling rod and salvage booster respectively, set up the liquid flow passageway that link up both ends on the axis the body of rod of anchor main part is fixed to connect liquid cylinder cover, still overlaps simultaneously and overlapsA piston sleeve matched with the hydraulic cylinder sleeve is arranged, the piston sleeve and the hydraulic cylinder sleeve form a hydraulic cylinder structure in a matching way, a sealed hydraulic cavity in the hydraulic cylinder structure is communicated with the liquid flow channel through a flow guide hole formed in the anchor main body, the tooth holder frame is fixedly connected to the end of the piston sleeve and sleeved on the anchor main body, axial windows which are uniformly distributed along the circumference and used for embedding the anchor tooth blocks are formed in the side wall of the piston sleeve, the anchor tooth holder is fixedly sleeved at the position corresponding to the position where the tooth holder frame is sleeved on the anchor main body, a movement space for the tooth holder frame to move upwards is preset at the upper part of the position where the tooth holder is sleeved on the side wall of the anchor tooth holder, saw-tooth teeth surrounding the circumference are arranged on the outer circumferential surface of the anchor tooth holder, and the saw-tooth teeth have a tooth height L2The anchor tooth block is a strip-shaped cambered surface body, is embedded in the axial window formed in the tooth seat frame and is restrained and supported by the tooth seat frame, inverted sawtooth-shaped teeth correspondingly matched with the sawtooth-shaped teeth on the anchor tooth seat are arranged on the inner cambered surface, anchor teeth are arranged on the outer cambered surface, when the anchor tooth block is pushed by the anchor tooth seat to move upwards relative to the anchor tooth seat, the sawtooth-shaped teeth and the tooth inclined surfaces on the inverted sawtooth-shaped teeth are mutually matched, so that the anchor tooth block is radially supported and protruded out of the axial window on the tooth seat frame, and the outer cambered surface is expanded and supported on the pipe wall of an oil well casing pipe to anchor the anchor tooth block on the oil well casing pipe.
The hydraulic control type drill rod dynamic anchor is characterized in that the number of the axial windows on the tooth seat frame and the number of the corresponding anchor tooth blocks embedded in the tooth seat frame are 3-8 respectively, so that the anchoring connection firmness and stability of the anchor tooth blocks and the oil well casing are guaranteed.
The hydraulic control type drill rod dynamic anchor is characterized in that a reset spring is preferably sleeved on the anchor main body, one end of the reset spring is fixed on the anchor main body, the other end of the reset spring is supported on the piston sleeve and used for providing additional reset thrust for the piston sleeve when anchoring is removed, the reset thrust and the gravity of the piston sleeve, the tooth holder frame and the anchor tooth block jointly act to push the piston sleeve to smoothly move downwards relative to the anchor main body, the anchor tooth block is guaranteed to be timely retracted in the tooth holder frame, and the reliability of anchoring removal is guaranteed.
Preferably, spring pieces are respectively mounted at the upper end and the lower end of each axial window on the outer circumference of the tooth seat frame, extend into the axial windows, and limit the protrusion of the anchor tooth block from the axial windows under the anchoring-released state, so that the operation of a drilling tool and a drilling rod is prevented from being hindered.
The hydraulic control type dynamic anchoring device for the drill rod is characterized in that a pressure balance hole is preferably formed in a matching section of the piston sleeve and the hydraulic cylinder sleeve, the pressure balance hole can be separated from the shielding of the piston sleeve after the piston sleeve moves upwards relative to the hydraulic cylinder sleeve in an anchoring state by being formed in the position, the pressure balance hole is exposed in underground drilling fluid, the pressure difference between the inner cambered surface and the outer cambered surface of the piston sleeve is balanced, the motion resistance of the piston sleeve is reduced, and the utilization efficiency of the well hydraulic pressure is improved.
The hydraulic control type drill rod dynamic anchor is preferably arranged on the anchor main body, a reducing shoulder is arranged in a movement space, on the upper portion of the tooth seat frame sleeving position, of the tooth seat frame, the movement space is preset, the tooth seat frame moves upwards, and the maximum movable distance L of the tooth seat frame is limited1Providing anchoring safety protection for the hydraulic control type dynamic pipe string anchoring device, wherein the maximum movable distance L1Is less than the tooth height L on the anchor tooth seat2。
The beneficial effects of the utility model are that, a hydraulic control formula drilling rod dynamic anchoring ware of supporting use of booster is salvaged with the hydraulic control formula is provided, adopt liquid cylinder cover and piston sleeve complex liquid flow pressure drive structure, utilize liquid flow pressure tight anchor block that rises, carry work to provide helping hand location support fulcrum for hydraulic booster, use with hydraulic booster is supporting, can realize the synchronous anchoring of boosting with hydraulic booster, accomplish the boosting at hydraulic booster and pull stroke pressure release lifting drilling rod and remove the anchoring in step when the boosting, draw the periodic variation in-process synchronous cooperation that promotes with the drilling rod and realize periodic dynamic anchoring at hydraulic booster boosting, can show the mechanized level that improves the operation is salvaged to tubular column in the pit, and then improve and salvage efficiency, satisfy oil field exploitation production demand.
Drawings
FIG. 1 is a schematic diagram of a hydraulically controlled dynamic string anchor.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
Fig. 4 is a partial enlarged view of fig. 1 at point i.
FIG. 5 is a schematic diagram of the hydraulically controlled dynamic string anchor in an anchored state.
Fig. 6 is a cross-sectional view taken along line C-C of fig. 5.
Fig. 7 is a partial enlarged view of fig. 5 at ii.
Detailed Description
The technical solution claimed in the present invention is further described below with reference to the following specific embodiments and accompanying drawings.
A hydraulic control type drill rod dynamic anchor is composed of an upper connector 1, a central shaft 2, an anchor tooth block 3, an anchor tooth seat 4, a tooth seat frame 5, a piston sleeve 6, a hydraulic cylinder sleeve 7, a reset spring 8 and a centering sleeve 9, wherein the central shaft 2 is in threaded connection with the upper connector 1 to form an anchor main body, an anti-rotation pin is installed on a connection surface between the central shaft 2 and the upper connector 1, inner threads and outer threads are respectively arranged at the upper end and the lower end of the anchor main body, a liquid flow channel 10 penetrating through the two ends is arranged on a central axis, the hydraulic cylinder sleeve 7 and the piston 6 sleeve are sleeved on a rod body of the central shaft 2, the hydraulic cylinder sleeve 7 is fixedly connected to the central shaft 2 through the centering sleeve 9, the anti-rotation pin is arranged between the centering sleeve 9 and the central shaft 2, and the piston sleeve 6 and the hydraulic cylinder sleeve 7 are matched to form a hydraulic cylinder structure, as shown in fig. 3, 2 diversion holes 11 are formed in the side wall of the central shaft 2 to communicate a sealed hydraulic cavity in the hydraulic cylinder structure with the fluid flow channel 10, a pressure balance hole 14 is formed in a matching section of the piston sleeve 6 and the fluid cylinder sleeve 7, and the tooth seat frame 5 is in threaded connection with the end of the piston sleeve 6 and is sleeved in the centerThe shaft 2 is provided with 6 axial windows on the side wall, the anchor tooth seat 4 is sleeved on the central shaft 2 corresponding to the sleeved position of the tooth seat frame 5, the upper part of the sleeved position of the tooth seat frame 5 is preset with a movement space for the tooth seat frame 5 to move upwards, and meanwhile, a reducing circular bead is arranged in the movement space for the tooth seat frame to move upwards on the upper joint 1 to limit the maximum movable distance L of the tooth seat frame 51The anchor tooth seat 4 is fixedly connected to the central shaft 2 through a fastening nut 12, sawtooth-shaped teeth surrounding the circumference are arranged on the outer circumferential surface, the anchor tooth block 3 is a strip-shaped cambered surface body, is embedded in the axial opening window and is supported by the tooth seat frame 5, inverted sawtooth-shaped teeth correspondingly matched with the sawtooth-shaped teeth on the anchor tooth seat 4 are arranged on the inner cambered surface, and anchor teeth are arranged on the outer cambered surface, as shown in fig. 4 and 7, spring pieces 13 extending into the axial opening window are respectively arranged at the upper end and the lower end of each axial opening window on the outer circumference of the tooth seat frame 5 to abut against and limit the anchor tooth block 3, the reset spring 8 is sleeved on the central shaft 2, one end of the reset spring is fixed on the central shaft 2, and the other end of the reset spring is supported on the piston sleeve 6.
The hydraulic control type drill pipe dynamic anchor is applied, the anchor is connected to the upper part of a matched hydraulic booster, meanwhile, a reversing valve for controlling the closing or opening of a mud fluid flow channel is connected to the hydraulic booster, the anchor, a connector of the hydraulic booster and the reversing valve are connected to a pipe string fishing drill pipe and delivered to the underground along with a drilling tool drill pipe, the drilling tool drill pipe and the anchor, the hydraulic booster and the reversing valve which are connected with the drilling tool drill pipe are kept communicated with each other through a fluid channel, the normal circulation of the underground mud fluid flow is realized, and the drilling pipe is controlled to carry out conventional fishing operation and other related underground operation; when a salvaging drill rod encounters blockage and blockage release difficulty and needs to start the hydraulic booster, the drill rod of the drilling tool is firstly controlled to close the reversing valve, a liquid flow channel of the drill rod of the drilling tool is blocked, and simultaneously slurry liquid flow pump pressure is continuously supplied to the underground, at the same time, as shown in figure 1, the underground liquid flow pressure is conducted into a sealed hydraulic cavity of a hydraulic cylinder structure from a liquid flow channel 10 through a flow guide hole 11, as shown in figure 5, the increase of the pressure in the sealed hydraulic cavity pushes a piston sleeve 6 and a tooth seat frame 5 connected with the piston sleeve 6 to move upwards relative to a central shaft 2, the tooth seat frame 5 further drives an anchor tooth block 3 embedded therein to move upwards, when the anchor tooth block 3 moves upwards, tooth inclined surfaces on sawtooth-shaped teeth on the anchor tooth block 3 and inverted sawtooth-shaped teeth on an anchor tooth seat 4 are mutually matched, so that the anchor tooth block 3 is radially expanded and protruded out of the axial opening window on the tooth seat frame 5, the extrados surface is expanded on the wall of an oil well casing, and the drilling tool drill rod is anchored on the oil well casing through the anchor; meanwhile, the hydraulic booster is driven to start to work along with the increase of the downhole liquid flow pressure, the boosting drawing is carried out on the downhole pipe column, when the hydraulic booster finishes the boosting drawing pressure relief resetting of one stroke period, the liquid flow pressure in the liquid flow channel of the anchor 10 is reduced, the piston sleeve 6 moves downwards relative to the central shaft 2 to enable the anchor to be released from anchoring with the oil well casing, after the hydraulic booster is reset to complete and close the pressure relief hole, a slurry liquid flow pump pressure continuously provided at the well head drives the hydraulic booster to enter the boosting drawing of the next stroke period, the anchor also anchors the drilling rod on the oil well casing again along with the increase of the liquid flow pressure, the boosting drawing is completed by matching with the hydraulic booster, and the unfreezing of the fishing pipe column generally needs the hydraulic booster to carry out the boosting drawing of a plurality of stroke periods, in the process, the hydraulic control type drill pipe dynamic anchor can be matched with the hydraulic booster to complete periodic dynamic anchoring until the blockage of the pipe column is overcome; after the pipe column is unfreezed, the drilling tool drill rod is controlled to open the reversing valve, the liquid flow channel of the drilling tool drill rod is opened, the anchor is released from anchoring along with the reduction of the liquid flow pressure in the liquid flow channel, the hydraulic booster stops working, and the fishing operation is recovered to a conventional fishing operation state until the underground pipe column is fished out of the well.
Claims (6)
1. A hydraulically controlled dynamic drill pipe anchor, comprising: an upper joint (1), a central shaft (2) and an anchorA tooth block (3), an anchor tooth seat (4), a tooth seat frame (5), a piston sleeve (6) and a hydraulic cylinder sleeve (7), wherein the central shaft (2) and the upper joint (1) are fixedly connected to form a rod-shaped anchor main body, two ends of the anchor main body are respectively provided with a connecting structure, a liquid flow channel (10) penetrating through the two ends is arranged on a central axis, the hydraulic cylinder sleeve (7) is fixedly sleeved on a rod body of the anchor main body, the piston sleeve (6) matched with the hydraulic cylinder sleeve (7) is sleeved at the same time, the piston sleeve (6) and the hydraulic cylinder sleeve (7) are matched to form a hydraulic cylinder structure, a sealed hydraulic cavity in the hydraulic cylinder structure is communicated with the liquid flow channel (10) through a flow guide hole (11) formed in the anchor main body, the tooth seat frame (5) is fixedly connected to the end of the piston sleeve (6) and sleeved on the anchor main body, axial windows which are uniformly distributed along the circumference are arranged on the side wall, the anchor tooth seat (4) is fixedly sleeved at the position corresponding to the sleeving position of the tooth seat frame (5) on the anchor body, the upper part of the sleeving position of the tooth seat frame (5) is preset with a movement space for upward movement of the tooth seat frame (5), saw-tooth-shaped teeth which surround the circumference are arranged on the outer circumferential surface of the anchor tooth seat (4), and the saw-tooth-shaped teeth have a tooth height L2The anchor tooth block (3) is a strip-shaped cambered surface body, is embedded in the axial window formed in the tooth seat frame (5) and is restrained and supported by the tooth seat frame (5), inverted sawtooth-shaped teeth which are correspondingly matched with the sawtooth-shaped teeth on the anchor tooth seat (4) are arranged on the inner cambered surface, and anchor teeth are arranged on the outer cambered surface.
2. The hydraulically controlled dynamic drill pipe anchor of claim 1, wherein: a return spring (8) is sleeved on the anchor main body, one end of the return spring (8) is fixed on the anchor main body, and the other end of the return spring is supported on the piston sleeve (6).
3. The hydraulically controlled dynamic drill pipe anchor of claim 1, wherein: spring pieces (13) are respectively installed at the upper end and the lower end of each axial window on the outer circumference of the tooth seat frame (5), and the spring pieces (13) extend into the axial windows.
4. The hydraulically controlled dynamic drill pipe anchor of claim 1, wherein: and a pressure balance hole (14) is formed in the matching section of the piston sleeve (6) and the hydraulic cylinder sleeve (7), and the pressure balance hole (14) can be separated from the shielding of the piston sleeve (6) after the piston sleeve (6) moves upwards relative to the hydraulic cylinder sleeve (7) in an anchoring state.
5. The hydraulically controlled dynamic drill pipe anchor of claim 1, wherein: on the anchor main body, a reducing shoulder is arranged in a movement space of the tooth seat frame (5) which is preset at the upper part of the sleeved position of the tooth seat frame (5) and moves upwards, and the maximum movable distance L of the tooth seat frame (5) is limited1Said maximum movable distance L1Is less than the tooth height L on the anchor tooth seat (4)2。
6. A hydraulically controlled drill pipe dynamic anchor as defined in any one of claims 1 to 5, wherein: the number of the axial windows on the tooth seat frame (5) and the number of the corresponding anchor tooth blocks (3) which are embedded are respectively 3-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120977780.0U CN214944120U (en) | 2021-05-11 | 2021-05-11 | Hydraulic control type drill rod dynamic anchor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120977780.0U CN214944120U (en) | 2021-05-11 | 2021-05-11 | Hydraulic control type drill rod dynamic anchor |
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| CN214944120U true CN214944120U (en) | 2021-11-30 |
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| CN202120977780.0U Active CN214944120U (en) | 2021-05-11 | 2021-05-11 | Hydraulic control type drill rod dynamic anchor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187424A (en) * | 2021-05-11 | 2021-07-30 | 牡丹江瀚捷石油科技有限责任公司 | Hydraulic control type pipe column fishing reinforcement system |
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2021
- 2021-05-11 CN CN202120977780.0U patent/CN214944120U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187424A (en) * | 2021-05-11 | 2021-07-30 | 牡丹江瀚捷石油科技有限责任公司 | Hydraulic control type pipe column fishing reinforcement system |
| CN113187424B (en) * | 2021-05-11 | 2024-01-26 | 牡丹江瀚捷石油科技有限责任公司 | Hydraulic control type pipe column salvage reinforcement system |
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