阅读说明：本技术 一种裸眼封堵装置 (Naked eye plugging device ) 是由 李刚 赵文红 夏雷 丁文峰 孟宪波 李伟 刘彦辉 于 2019-03-28 设计创作，主要内容包括：一种裸眼封堵装置,密封内管的外部有外变径台肩面,密封内管上有传压孔,密封内管的外壁上安装上密封圈,密封内管的外壁上有外单向锁扣,密封外管的内部有内变径台肩面,密封外管的内部安装下密封圈,密封外管套装在密封内管外,在密封外管的上部内放入单向开口锁环,开口锁环的内壁上有内单向锁扣,开口锁环的内壁上的内单向锁扣与外单向锁扣相配,两者相扣时开口锁环不能向上行走,联接套的下部连接在密封内管的上部,联接套由定压剪钉连接在密封内管上,内管的上部穿过上锥体后与密封内管的下部连接,在内管的外部套装胶筒,下锥体的上部与内管的下部连接,下入需要改变井身轨迹的祼眼井筒的底部,向内打压能使胶筒压缩扩张密封祼眼井壁。(An open hole plugging device, an outer diameter-variable shoulder surface is arranged outside a sealed inner tube, a pressure transfer hole is arranged on the sealed inner tube, an upper sealing ring is arranged on the outer wall of the sealed inner tube, an outer one-way lock catch is arranged on the outer wall of the sealed inner tube, an inner diameter-variable shoulder surface is arranged inside the sealed outer tube, a lower sealing ring is arranged inside the sealed outer tube, the sealed outer tube is sleeved outside the sealed inner tube, a one-way open lock ring is placed in the upper portion of the sealed outer tube, an inner one-way lock catch is arranged on the inner wall of the open lock ring, the inner one-way lock catch on the inner wall of the open lock ring is matched with the outer one-way lock catch, the open lock ring cannot move upwards when the inner one-way lock catch and the outer one-way lock catch are buckled with each other, the lower portion of a connecting sleeve is connected to the upper portion of the sealed inner tube, the bottom of the naked eye pit shaft that need change the well body orbit is gone into, inwards suppresses and enables the sealed naked eye wall of a well of packing element compression expansion.)

1. The utility model provides an bore hole plugging device, includes sealed inner tube (1), level pressure shear pin (2), one-way opening catch (3), goes up sealing washer (4), lower sealing washer (5), sealed outer tube (6), goes up cone (7), packing element (8), inner tube (9), lower cone (10), coupling sleeve (11), characterized by: the outer part of the inner sealing pipe (1) is provided with an outer reducing shoulder surface (1-2), the outer diameter above the outer reducing shoulder surface (1-2) is larger than the outer diameter below the outer reducing shoulder surface, the inner sealing pipe (1) is provided with a pressure transmitting hole (1-3), the pressure transmitting hole (1-3) is positioned below the outer reducing shoulder surface (1-2), the outer wall of the inner sealing pipe (1) is provided with an upper sealing ring (4), the upper sealing ring (4) is positioned above the outer reducing shoulder surface (1-2), the outer wall of the inner sealing pipe (1) is provided with an outer one-way lock catch (1-1), the outer one-way lock catch (1-1) is positioned above the upper sealing ring (4), the inner part of the outer sealing pipe (6) is provided with an inner reducing shoulder surface (6-2), the inner part of the outer sealing pipe (6) above the inner reducing shoulder surface (6-2) is larger than the inner diameter below the inner, a lower sealing ring (5) is arranged in a sealing outer pipe (6), the lower sealing ring (5) is positioned below an inner reducing shoulder surface (6-2), the sealing outer pipe (6) is sleeved outside the sealing inner pipe (1), the inner reducing shoulder surface (6-2) is positioned below an outer reducing shoulder surface (1-2), the lower sealing ring (5) is positioned below a pressure transmission hole (1-3), an upper sealing ring (4) and the lower sealing ring (5) seal a gap between the sealing inner pipe (1) and the sealing outer pipe (6) so that fluid transmitted into a gap between the inner reducing shoulder surface (6-2) and the outer reducing shoulder surface (1-2) from the pressure transmission hole (1-3) can not leak, a conical shoulder (6-1) is arranged in the upper part of the sealing outer pipe (6), a one-way opening locking ring (3) is arranged in the upper part of the sealing outer pipe (6), the cone at the lower end of the one-way opening lock ring (3) is matched with the conical shoulder (6-1), the opening lock ring (3) is positioned on the outer one-way lock catch (1-1), the inner wall of the opening lock ring (3) is provided with an inner one-way lock catch, the inner one-way lock catch on the inner wall of the opening lock ring (3) is matched with the outer one-way lock catch (1-1), the opening lock ring (3) cannot move upwards when the two are buckled, the lower part of the connecting sleeve (11) is connected with the upper part of the sealing inner tube (1) to ensure that the opening lock ring (3) cannot move axially in the sealing outer tube (6), the connecting sleeve (11) is connected on the sealing inner tube (1) through the constant pressure shear pin (2), the upper cone (7) is arranged at the lower part of the sealing outer tube (6), the lower part of the upper cone (7) is cone, and the diameter of, the upper portion of inner tube (9) is connected with the lower portion of sealed inner tube (1) after passing through upper cone (7), the junction keeps sealed, rubber tube (8) is sleeved outside inner tube (1), the upper portion of rubber tube (8) has a conical bore, the conical bore is sleeved outside the cone at the lower portion of upper cone (7), the lower portion of rubber tube (8) has a conical bore, the upper portion of lower cone (10) is a cone, the diameter of the upper end of cone is smaller than the diameter of the lower end, the upper portion of lower cone (10) is connected with the lower portion of inner tube (9), the junction keeps sealed, and the cone at the upper portion of lower cone (10) enters the conical bore at the lower portion of rubber tube (8).

Technical Field

The invention relates to equipment for oil exploitation, well completion and well repair, in particular to an open hole plugging device.

Background

When the oil field drills to a certain depth, the well bore track needs to be changed, the well is drilled from an opening above the drilled well bottom to another position, in order to prevent the well bottom of the drilled well bore from flowing back, the well bottom needs to be permanently sealed, and the operation is called sealing and isolation in the oil field. Since the section of the well wall is not yet cased, it is said that operations such as sealing, isolating, etc. are performed in the open hole wellbore. At present, when operations such as sealing and isolating are carried out in an open hole shaft, a method of drilling a suspended cement plug is mostly adopted to seal and isolate the bottom of a well. The following problems exist in the process of drilling the suspended cement plug: (1) the cement plug beating process is complex and long in period; (2) the phenomena of well leakage and well kick exist in part of wells, and the risk of cementing plugs is high; (3) the cement plug has limited strength, low packing strength and easy failure.

Disclosure of Invention

The invention aims to design an open hole plugging device, which overcomes the problems of the open hole cement plug, and can simply and conveniently carry out operations such as sealing, isolating and the like in an open hole shaft needing to change a well track.

The purpose of the invention is realized as follows: the pressure-transmitting sealing structure comprises a sealing inner pipe, a constant-pressure shear pin, a one-way opening lock ring, an upper sealing ring, a lower sealing ring, a sealing outer pipe, an upper cone, a rubber cylinder, an inner pipe, a lower cone and a connecting sleeve, wherein the outer part of the sealing inner pipe is provided with an outer diameter-changing shoulder surface, the outer diameter above the outer diameter-changing shoulder surface is larger than the outer diameter below the outer diameter-changing shoulder surface, the sealing inner pipe is provided with a pressure-transmitting hole, the pressure-transmitting hole is positioned below the outer diameter-changing shoulder surface, the outer wall of the sealing inner pipe is provided with the upper sealing ring, the upper sealing ring is positioned above the outer diameter-changing shoulder surface, the outer wall of the sealing inner pipe is provided with an outer one-way lock catch, the outer one-way lock catch is positioned above the upper sealing ring, the inner diameter-changing shoulder surface is arranged inside the sealing outer pipe, the lower, the sealing outer pipe is sleeved outside the sealing inner pipe, the inner reducing shoulder surface is positioned below the outer reducing shoulder surface, the lower sealing ring is positioned below the pressure transmission hole, the upper sealing ring and the lower sealing ring seal the gap between the sealing inner pipe and the sealing outer pipe, so that fluid transmitted into the gap between the inner reducing shoulder surface and the outer reducing shoulder surface from the pressure transmission hole cannot leak, the upper part of the sealing outer pipe is internally provided with a conical shoulder, a one-way opening locking ring is arranged in the upper part of the sealing outer pipe, a cone at the lower end of the one-way opening locking ring is matched with the conical shoulder, the opening locking ring is positioned above the outer one-way locking ring, the inner one-way locking ring is arranged on the inner wall of the opening locking ring, the inner one-way locking ring on the inner wall of the opening locking ring is matched with the outer one-way locking ring, when the inner one-way locking ring and the outer one-, the opening lock ring can not move axially in the sealing outer pipe, the connecting sleeve is connected to the sealing inner pipe through a constant pressure shear pin, the lower part of the sealing outer pipe is provided with an upper cone, the lower part of the upper cone is a cone, the diameter of the lower end of the cone is smaller than that of the upper end of the cone, the upper part of the inner pipe penetrates through the upper cone and then is connected with the lower part of the sealing inner pipe, the joint is kept sealed, the rubber cylinder is sleeved outside the inner pipe, the upper part of the rubber cylinder is provided with a conical hole, the conical hole is sleeved outside the cone at the lower part of the upper cone, the lower part of the rubber cylinder is provided with a conical hole, the upper end of the cone is smaller than the diameter of the lower end of the cone, the upper part of the lower cone is connected with the lower part of the inner pipe.

The invention has the beneficial effects that: the bottom of the naked eye pit shaft that needs to change the well body orbit is gone into behind the lower part installation closing device of lower cone, inwards suppresses and enables the packing element compression expansion sealed naked eye well wall to fix the compression expansion state of packing element down permanent sealed naked eye pit shaft by dashing to the opening catch. Compared with the method for drilling the suspended cement plug, the method can simply and conveniently perform operations such as sealing, isolating and the like in the open hole shaft needing to change the well track.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention.

Fig. 2 is a top structural view of fig. 1.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Embodiments of the present invention will be described below with reference to the drawings.

As shown in the figure, the embodiment of the invention comprises a sealing inner tube 1, a constant pressure shear pin 2, a one-way opening lock ring 3, an upper seal ring 4, a lower seal ring 5, a sealing outer tube 6, an upper cone 7, a rubber cylinder 8, an inner tube 9, a lower cone 10 and a coupling sleeve 11, wherein the outer part of the sealing inner tube 1 is provided with an outer reducing shoulder surface 1-2, the outer diameter of the upper part of the outer reducing shoulder surface 1-2 is larger than that of the lower part of the outer reducing shoulder surface, the sealing inner tube 1 is provided with a pressure transfer hole 1-3, the pressure transfer hole 1-3 is positioned below the outer reducing shoulder surface 1-2, the outer wall of the sealing inner tube 1 is provided with the upper seal ring 4, the upper seal ring 4 is positioned above the outer reducing shoulder surface 1-2, the outer wall of the sealing inner tube 1 is provided with an outer one-way lock catch 1-1, the outer lock catch 1-1 is positioned above the upper seal ring 4, the inner, the inner diameter of the outer sealing pipe 6 above the inner reducing shoulder surface 6-2 is larger than the inner diameter below the inner diameter, the inner sealing pipe 6 is internally provided with a lower sealing ring 5, the lower sealing ring 5 is positioned below the inner reducing shoulder surface 6-2, the outer sealing pipe 6 is sleeved outside the inner sealing pipe 1, the inner reducing shoulder surface 6-2 is positioned below the outer reducing shoulder surface 1-2, the lower sealing ring 5 is positioned below the pressure transmitting hole 1-3, the upper sealing ring 4 and the lower sealing ring 5 seal the gap between the inner pipe 1 and the outer sealing pipe 6, so that the fluid transmitted into the gap between the inner reducing shoulder surface 6-2 and the outer reducing shoulder surface 1-2 from the pressure transmitting hole 1-3 can not leak, the upper part of the outer sealing pipe 6 is internally provided with a conical shoulder 6-1, the upper part of the outer sealing pipe 6 is internally provided with a one-way opening locking ring 3, the cone at the lower end of the one-way opening lock ring 3 is matched with the conical shoulder 6-1, the opening lock ring 3 is positioned on the outer one-way lock catch 1-1, the inner wall of the opening lock ring 3 is provided with an inner one-way lock catch, the inner one-way lock catch on the inner wall of the opening lock ring 3 is matched with the outer one-way lock catch 1-1, the opening lock ring 3 can not move upwards when the two are buckled, the lower part of the connecting sleeve 11 is connected with the upper part of the sealed inner tube 1, so that the opening lock ring 3 can not move axially in the sealed outer tube 6, the connecting sleeve 11 is connected on the sealed inner tube 1 through the constant pressure shear pin 2, the lower part of the sealed outer tube 6 is provided with an upper cone 7, the lower part of the upper cone 7 is a cone, the diameter of the lower end of the cone is smaller than that of the upper part of the inner tube 9 passes through the upper cone 7 and then is, the upper part of the rubber cylinder 8 is provided with a conical hole which is sleeved outside the conical body at the lower part of the upper cone 7, the lower part of the rubber cylinder 8 is provided with a conical hole, the upper part of the lower cone 10 is a cone, the diameter of the upper end of the cone is smaller than that of the lower end of the cone, the upper part of the lower cone 10 is connected with the lower part of the inner pipe 9, the connection part is kept sealed, and the cone at the upper part of the lower cone 10 enters the conical hole at the lower part of the rubber cylinder 8.

After a sealing device (preferably a check valve can meet the well washing requirement) is installed at the lower part of the lower cone 10, the bottom of an naked eye shaft needing to change the track of a well body is lowered, pressure is pressed inwards, the pressure is transmitted into a space sealed by the upper sealing ring 4 and the lower sealing ring 5 from the pressure transmission hole 1-3, downward force is generated by the pressure on the inner reducing shoulder surface 6-2, the fixed pressure shear pin 2 is cut off, the one-way opening locking ring 3 descends along with the sealing outer pipe 6, the upper cone 7 and the lower cone 10 extrude the rubber cylinder 8, the rubber cylinder 8 compresses and expands the sealing naked eye shaft wall, the one-way opening locking ring 3 simultaneously reaches the outer one-way lock catch 1-1 and is locked together, and the compression expansion state of the rubber cylinder 8 is fixed to permanently seal the naked eye shaft.

After the state is reached, the releasing device on the pipe column is put into operation, the pipe column is separated from the invention, and the installation work of the invention can be completed, so that the method is simpler and more convenient than the method of sealing the naked eye wellbore by a suspended cement plug.

The rubber cylinder 8 is a self-expansion rubber cylinder, expands and expands when meeting oil and water after being placed into the well and sealed, and is attached to an irregular well hole, so that the sealing performance is improved.

The packing element 8 can set more than 2, if the packing element sets more than 2, install the bipyramid cover between packing element and the packing element, there is the toper round hole at the upper and lower both ends of bipyramid cover, and the outer end diameter of toper round hole is greater than the inner end diameter, as shown in fig. 1.