阅读说明：本技术 液压式防顶防掉工具 (Hydraulic anti-jack and anti-drop tool ) 是由 梁伟成 梁闯 于 2019-11-01 设计创作，主要内容包括：本发明涉及液压式防顶防掉工具,包括上接头,中心管,上工作筒,下工作筒；所述中心管上设有滑套,连接套,解封套,固定活塞,释放活塞,衬套,下接头；所述上接头下部与过渡接套上端连接,打捞接头下端外侧连接上工作筒；滑套与连接套之间设有弹簧,连接套下端与解封套上端连接；解封环与解封套之间的环空中嵌有钢球；固定活塞上端套有卡簧；所述衬套与释放活塞连接,所述衬套上从上至下套装有中胶筒、垫片、边胶筒、锥体帽、上锥体、卡瓦、卡瓦挂、下锥体,下锥体下端连接于下接头,下接头与中心管下端连接,本发明保证在释放压缩胶筒时避免提前丢开导致工具落入井底,防止由于地层压力导致提前解封。(The invention relates to a hydraulic anti-jacking and anti-falling tool, which comprises an upper joint, a central pipe, an upper working cylinder and a lower working cylinder; the central tube is provided with a sliding sleeve, a connecting sleeve, an unsealing sleeve, a fixed piston, a release piston, a bushing and a lower joint; the lower part of the upper joint is connected with the upper end of the transition connecting sleeve, and the outer side of the lower end of the fishing joint is connected with the upper working barrel; a spring is arranged between the sliding sleeve and the connecting sleeve, and the lower end of the connecting sleeve is connected with the upper end of the deblocking sleeve; a steel ball is embedded in an annular space between the unsealing ring and the unsealing sleeve; the upper end of the fixed piston is sleeved with a clamp spring; the tool is characterized in that the bushing is connected with the release piston, the bushing is sleeved with a middle rubber cylinder, a gasket, an edge rubber cylinder, a cone cap, an upper cone, a slip hanger and a lower cone from top to bottom, the lower end of the lower cone is connected with the lower joint, and the lower joint is connected with the lower end of the central tube.)

1. The hydraulic anti-jacking and anti-falling tool comprises an upper joint, a central pipe, an upper working cylinder and a lower working cylinder; the method is characterized in that: the central tube is provided with a sliding sleeve, a connecting sleeve, an unsealing sleeve, a fixed piston, a release piston, a bushing and a lower joint; the lower part of the upper joint is connected with a transition connecting sleeve, the lower end of the transition connecting sleeve is arranged on the inner side of the central pipe and fixedly connected with the central pipe, and the releasing shear pin is connected to the transition connecting sleeve at the front end of the locking block; a salvaging joint is sleeved on the outer side of the middle part of the transition connecting sleeve, and the outer side of the lower end of the salvaging joint is connected with an upper working barrel; a sliding sleeve is arranged between the upper working barrel and the central pipe, and the sliding sleeve is connected and locked with the central pipe; the lower end of the upper working barrel is connected with the upper end of the connecting sleeve, a spring is arranged between the sliding sleeve and the connecting sleeve, the lower end of the connecting sleeve is connected with the upper end of the unsealing sleeve, and the unsealing sleeve is connected with the central pipe; the upper end of the lower working cylinder is connected with the lower end of the connecting sleeve, the lower end of the lower working cylinder is connected with the upper end of the release piston, the unpacking sleeve and the fixed piston are arranged between the lower working cylinder and the central pipe, and the release piston is fixedly connected with the central pipe; an unsealing ring is arranged between the unsealing sleeve and the fixed piston, the unsealing ring is sleeved on the central tube, and a steel ball is embedded in an annular space between the unsealing ring and the unsealing sleeve; the upper end of the fixed piston is sleeved with a clamp spring which is embedded between the fixed piston and the deblocking ring; the bushing is connected with the release piston, and a middle rubber cylinder, a gasket, an edge rubber cylinder, a cone cap, an upper cone, a slip hanger and a lower cone are sleeved on the bushing from top to bottom; the lower end of the cone cap is connected to the inner side of the upper end of the upper cone; go up the cone and fix on the bush, the slips upper end inlays in last cone, slips lower extreme inlays in the slips is hung, the slips hang with fixed at the bush, lower cone lower extreme is connected in lower joint, the lower joint is connected with the center tube lower extreme.

Technical Field

The invention relates to an underground tool for oil well production, in particular to a hydraulic type anti-jacking and anti-falling tool.

Background

The implementation of the layered water blocking and oil production technology and the sealing of high water-bearing layers is an effective method for controlling the water content of the oil well to rise. The layered blocking water adopts a packer, the existing packer has more types, but the problems of easy failure, downward slip, low bearing capacity, low construction success rate, difficult deblocking and the like exist. One type of tool on site is to take the oil pipe to an oil layer position and then press a seat seal, and then separate the oil pipe from a packer to realize the process of site called releasing, the adopted packer is a Y445 packer, the releasing of the packer is completed by a ball throwing or other auxiliary mechanisms, the releasing mechanism is unreliable due to the limitation of conditions such as pressure balance and the like, the construction success rate is low, the problems of releasing in advance and the like easily occur, and a shear pin bears the pressure applied by a rubber sleeve and is easily sheared off for a long time during releasing.

Disclosure of Invention

In order to make up the defects of the prior art, the invention aims to provide a hydraulic type top-resistant and drop-resistant tool, which can prevent the tool from falling into the bottom of a well due to early release when a compressed rubber cylinder is released, and prevent the tool from being deblocked due to formation pressure.

The invention aims to realize the following technical scheme that a hydraulic jacking-proof and dropping-proof tool comprises an upper joint, a central pipe, an upper working barrel and a lower working barrel; the technical key points are as follows: the central tube is provided with a sliding sleeve, a connecting sleeve, an unsealing sleeve, a fixed piston, a release piston, a bushing and a lower joint;

the lower part of the upper joint is in threaded connection with the upper end of the transition connecting sleeve, the lower end of the transition connecting sleeve is provided with a step platform, the lower end of the transition connecting sleeve is arranged on the inner side of the central pipe and is connected through a locking block, and the releasing shear pin is in threaded connection with the transition connecting sleeve at the front end of the locking block; a salvaging joint is sleeved on the outer side of the middle part of the transition connecting sleeve, and the outer side of the lower end of the salvaging joint is connected with an upper working barrel in a threaded manner;

a sliding sleeve is arranged between the upper working barrel and the central pipe, and the sliding sleeve is connected with the upper end of the central pipe through a shear pin A and then locked; the lower end of the upper working barrel is in threaded connection with the upper end of the connecting sleeve, a spring is arranged between the sliding sleeve and the connecting sleeve, internal threads at the lower end of the connecting sleeve are connected with external threads at the upper end of the deblocking sleeve, and the deblocking sleeve is connected with the central pipe through a shear pin B;

the upper end of the lower working cylinder is in threaded connection with the lower end of the connecting sleeve, internal threads at the lower end of the lower working cylinder are in threaded connection with external threads at the upper end of the release piston, the unpacking sleeve is used for fixing the piston, the front end of the release piston is arranged between the lower working cylinder and the central pipe, and the release piston is fixed with the central pipe through a shear pin B;

an unsealing ring is arranged between the unsealing sleeve and the fixed piston, the unsealing ring is sleeved on the central tube, and a steel ball is embedded in an annular space between the unsealing ring and the unsealing sleeve; the upper end of the fixed piston is sleeved with a clamp spring which is embedded between the fixed piston and the deblocking ring;

the outer thread at the upper end of the bushing is connected with the inner thread of the release piston, and a middle rubber cylinder, a gasket, an edge rubber cylinder, a cone cap, an upper cone, a slip hanger and a lower cone are sleeved on the bushing from top to bottom; the external thread at the lower end of the cone cap is connected with the internal thread at the upper end of the upper cone;

shear pin C will go up the cone and fix on the bush, and the slips upper end inlays in last cone, and the slips lower extreme inlays in the slips is hung, shear pin D with the slips hang with fixed at the bush, internal thread connection in the external screw thread of lower clutch of cone lower extreme, lower clutch internal thread and center tube lower extreme external screw thread connection.

The invention has the technical effects that:

(1) when the tool is released, the spring is compressed to store energy, the sliding sleeve presses the locking block all the time, the tool is prevented from falling into the well bottom due to the fact that the sliding sleeve is released in advance when the compressed rubber cylinder is released, and after the releasing is completed, the pressing sliding sleeve moves upwards under the elastic force of the spring to open the releasing mechanism to complete releasing;

(2) the steel ball is embedded between the unsealing ring and the unsealing sleeve, so that the upward force of liquid in the well to the rubber sleeve can not be conducted on the shear pin B after the rubber sleeve is released, and the unsealing in advance due to formation pressure can not be carried out.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial view of the upper portion of the structure of the present invention;

FIG. 3 is a partial view of the middle of the structure of the present invention;

fig. 4 is a partial view of the lower portion of the structure of the present invention.

The names of the structures of FIGS. 1-4 are: the device comprises an upper joint 1, a transition connecting sleeve 2, a fishing joint 3, an upper working barrel 4, a releasing shear pin 5, a locking block 6, a sliding sleeve 7, a shear pin A8, a spring 9, a connecting sleeve 10, a releasing sleeve 11, a lower working barrel 12, a shear pin B13, a steel ball 14, a releasing ring 15, a snap spring 16, a fixed piston 17, a releasing piston 18, a middle rubber barrel 19, a gasket 20, a side rubber barrel 21, a cone cap 22, an upper cone 23, a shear pin C24, a slip 25, a shear pin D26, a slip hanger 27, a lining 28, a central pipe 29, a lower cone 30 and a lower joint 31.

Detailed Description

Referring to fig. 1-2, the specific structure of the present embodiment is: a hydraulic anti-jacking and anti-dropping tool comprises an upper joint 1, a central pipe 29, an upper working cylinder 4 and a lower working cylinder 12; the central tube 29 is provided with a sliding sleeve 7, a connecting sleeve 10, an unsealing sleeve 11, a fixed piston 17, a release piston 18, a bushing 28 and a lower joint 31,

the lower part of the upper joint 1 is connected with a transition connecting sleeve 2, the lower part of the upper joint 1 is in threaded connection with the upper end of the transition connecting sleeve 2, the lower end of the transition connecting sleeve 2 is provided with a step table, the lower end of the transition connecting sleeve 2 is arranged on the inner side of a central pipe 29 and is connected with the central pipe through a locking block 6, and a releasing shear pin 5 at the front end of the locking block 6 is in threaded connection with the transition connecting sleeve 2; a salvaging joint 3 is sleeved on the outer side of the middle part of the transition connecting sleeve 2, and the outer side of the lower end of the salvaging joint 3 is connected with an upper working barrel 4 through threads;

a sliding sleeve 7 is arranged between the upper working barrel 4 and the central pipe 29, and the sliding sleeve 7 is connected with the upper end of the central pipe 29 through a shear pin A8 and then locked; the lower end of the upper working barrel 4 is in threaded connection with the upper end of a connecting sleeve 10, a spring 9 is arranged between the sliding sleeve 7 and the connecting sleeve 10, internal threads at the lower end of the connecting sleeve 10 are connected with external threads at the upper end of a deblocking sleeve 11, and the deblocking sleeve 11 is connected with a central pipe 29 through a shear pin B13;

the upper end of the lower working cylinder 12 is in threaded connection with the lower end of the connecting sleeve 10, the internal thread at the lower end of the lower working cylinder 12 is connected with the external thread at the upper end of the release piston 18, the unpacking sleeve 11 and the fixed piston 17 are arranged, the front end of the release piston 18 is arranged between the lower working cylinder 12 and the central pipe 29, and the release piston 18 is fixed with the central pipe through a shear pin B13;

an unsealing ring 15 is arranged between the unsealing sleeve 11 and the fixed piston 17, the unsealing ring 15 is sleeved on a central tube 29, and a steel ball 14 is embedded in an annular space between the unsealing ring 15 and the unsealing sleeve 11; the upper end of the fixed piston 17 is sleeved with a clamp spring 16, and the clamp spring 16 is embedded between the fixed piston 17 and the unsealing ring 15;

the external thread at the upper end of the bushing 28 is connected with the internal thread of the release piston 18, and the bushing 28 is sleeved with a middle rubber cylinder 19, a gasket 20, an edge rubber cylinder 21, a cone cap 22, an upper cone 23, a slip 25, a slip hanger 27 and a lower cone 30 from top to bottom; the external thread at the lower end of the cone cap 22 is connected with the internal thread at the upper end of the upper cone 23;

the shear pin C24 fixes the upper cone 23 on the lining 28, the upper end of the slip 25 is embedded in the upper cone 23, the lower end of the slip 25 is embedded in the slip hanger 27, the shear pin D26 fixes the slip hanger 27 and the lining 28, the internal thread at the lower end of the lower cone 30 is connected with the external thread of the lower joint 31, and the internal thread of the lower joint 31 is connected with the external thread at the lower end of the central tube 29.

Working principle of the invention

(1) The releasing system consists of an upper joint 1, a transition connecting sleeve 2, a releasing shear pin 5 locking block 6, a sliding sleeve 7 and a spring 9 shear pin A8; the fishing joint 3, the upper working barrel 4, the connecting sleeve 10, the unsealing sleeve 11, the unsealing ring 15, the steel ball 14, the snap spring 16 and the lower working barrel 12 form an unsealing system.

(2) Setting: after the tool is lowered to the design depth, setting begins. Pressing shear pin B13 into the tubing releases piston 18 to shear pin C24 and shear pin D26 in sequence up and down the slips to spread the anchoring casing and subsequently compress the packing element to seal the annulus.

(3) Releasing: after the setting is finished, the shear pin A8 is continuously pressed and cut, the sliding sleeve downwards compresses the spring 9, after the pressing is stopped, the sliding sleeve 7 is bounced to open the locking block 6 due to the energy stored by the spring 9, and the pipe column is lifted to cut the shear pin A5.

(4) Deblocking: and lifting the lower special fishing anchor for deblocking.