CN101165311A

CN101165311A - Large orifice releasing packer

Info

Publication number: CN101165311A
Application number: CNA2006101426098A
Authority: CN
Inventors: 欧连贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-20
Filing date: 2006-10-20
Publication date: 2008-04-23

Abstract

The great diameter and great span back-off packer as one water shut-off and pendent tool for oil well consists of one loading assembly and one packer assembly mainly. After the loading assembly and the packer assembly are lowered to the required depth and the well head is set, clear water is pumped to pressurize, the piston in the loading assembly pushes the sealing and anchoring unit in the packer assembly via the shearing pin to anchor and lock. Then, the loading assembly is separated from the packer assembly automatically. The present invention has great shut-off span, great inner diameter, stable sealing, firm anchoring and other advantages.

Description

Large orifice releasing packer

Affiliated technical field

The present invention relates to the downhole tool that a kind of oil exploitation well is used for oil, the shutoff of well casing damage and separate zone production, especially arbitrarily the shutoff cover decreases position and card envelope mined bed, 51/2 " when oil well casing has been constructed lower tubular column; packer need not trip out; φ 73mm oil pipe can pass through, have that the shutoff span is big in packer, the large orifice releasing packer of the big function of latus rectum in the packer.

Background technology

The sleeve pipe on oil reservoir top in case take place damagedly for various reasons, changes cover, mending-leakage is a kind of complexity of constructing, expense is very high engineering, and success rate low, have a big risk.And existing back-off packer, because its structural reason, the shutoff span is little, the interior latus rectum of packer is little, 51/2, and " after oil well casing set, 27/8 " the oil pipe tubing string can not pass through in packer, therefore, can not satisfy the needs of produced on-site.

Summary of the invention

Little in order to overcome existing back-off packer shutoff span, interior latus rectum is little, the technological deficiency that " oil well casing is honored as a queen; 27/8 " oil pipe tubing string can not pass through in the packer 51/2, the invention provides that a kind of shutoff span is big, in the packer latus rectum big, simple in structure, set conveniently, reliable operation, the shutoff cover decreases position and water exit arbitrarily, " oil well casing when construction; packer need not trip out; 27/8, and " oil pipe just can pass through in packer 51/2,7 " more can be extensive use of in the oil well casing, can be for a long time at the large orifice releasing packer of underground work.

The technical solution adopted for the present invention to solve the technical problems is: top connection 1, central tube 2, pressure cap 3, cylinder head 4, cylinder barrel 5, O shape circle 7, piston 9, pin 14 are linked in sequence successively, form the top of sending into assembly and set hydraulic force mechanism; Central tube 25, pin 27, piston 29, cylinder barrel 32, O shape circle 34, cylinder head 35 are linked in sequence successively, form the bottom of sending into assembly and set hydraulic force mechanism; Central tube 25, pin 38, piston 39, cylinder barrel 42, O shape circle 43, cylinder head 44 are linked in sequence successively, form the grappling hydraulic force mechanism of sending into assembly; Central tube 2, box cupling 16, central tube 17, box cupling 21, central tube 25, ball-and-seat 45 are linked in sequence successively, form the assembly of sending into of the present invention by above-mentioned parts.Between box cupling 16 and box cupling 21, can increase or reduce the quantity and the length of central tube and box cupling according to the length of designing requirement plugged well section, make the length of sending into assembly reach the length of requirement plugged well section.Setting pipe 6, be linked in sequence successively from lock tube 8, packing element 11, spacer ring 12, baffle ring 13, pin 15, the top of forming the packer assembly sets and self-locking mechanism; Pin 22, baffle ring 23, packing element 24, spacer ring 26, be linked in sequence successively from lock tube 30, self-locking pipe 31, pin 33, setting pipe 36, the bottom of forming the packer assembly sets and self-locking mechanism; Setting pipe 36, stay pipe 40, slips 41 are linked in sequence successively, form the anchor mechanism of packer assembly; Setting pipe 6, box cupling 18, setting pipe 19, box cupling 20, setting pipe 36 are linked in sequence successively, form packer assembly of the present invention by above-mentioned parts.Between box cupling 18 and box cupling 20, can be according to the length of designing requirement plugged well section, increase or reduce the quantity of central tube and box cupling, make the length of packer assembly reach the length of requirement plugged well section.Sending into assembly packs in the packer assembly, trundle 10, trundle 28 and trundle 37 pass the chute (A1) of setting pipe 6 respectively, from lock tube 8, chute (A2), the hole of slips 41 and the chute (A3) of stay pipe 40 from lock tube 30, setting pipe 36, with being threaded on piston 9, piston 29 and the piston 39, just formed large orifice releasing packer.

The invention has the beneficial effects as follows: have the big characteristics of big and flexible, the interior latus rectum of shutoff span, the shutoff span is big, the longest the reaching more than the 350m of single-stage shutoff span, and can be according to the needs of shutoff length, in the scope of 1m-350m, do the adjustment combination of random length; Can realize multistage shutoff from bottom to top according to the oil well needs; Interior latus rectum is big, 51/2, and " in the oil well of sleeve pipe, the internal diameter of packer assembly can reach more than the Ф 90mm, during well construction, uses the special-purpose box cupling of external diameter≤Ф 85mm, and Ф 73mm oil pipe just can pass through smoothly from the central tube of packer; " in the oil well of sleeve pipe, the internal diameter of packer assembly can reach more than the Ф 120mm, and during well construction, Ф 89mm oil pipe can pass through smoothly from the central tube of packer 7; Remove safety, set, grappling is simply firm, can effectively prevent to set midway, packer can use in the down-hole for a long time, the damaged position or the water exit of sleeve pipe thoroughly can be blocked; Reduce construction cost, satisfy the needs of oil field produced on-site.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the vertical section constructional drawing of the embodiment of the invention.

Among Fig. 1: 1. top connection, 2. central tube, 3. pressure cap, 4. cylinder head, 5. cylinder barrel, 6. setting pipe, 7.O shape circle, 8. from lock tube, 9. piston, 10. trundle, 11. packing element, 12. spacer rings, 13. baffle rings, 14. pins, 15. pins, 16. box cupling, 17. central tubes, 18. box cuplings, 19. setting pipes, 20. box cupling, 21. box cuplings, 22. pins, 23. baffle rings, 24. packing element, 25. central tubes, 26. spacer rings, 27. pins, 28. trundle, 29. pistons, 30. from lock tube, 31. self-locking pipes, 32. cylinder barrel, 33. pins, 34.O shape circle, 35. cylinder heads, 36. setting pipe, 37. trundles, 38. pins, 39. pistons, 40. stay pipe, 41. slips, 42. cylinder barrels, 43.O shape circle, 44. cylinder head, 45. ball-and-seats, Ф 1. pressure transmission holes, Ф 2. pressure transmission holes, Ф 3. pressure transmission holes, A1. chute, A2. chute, A3. chute.

The specific embodiment

In the embodiment shown in fig. 1, central tube 2 external screw thread of having got on the bus is drilled with the hole; Cylinder head 4, cylinder head 35, cylinder head 44 internal and external screw thread of having got on the bus; Have groove on the setting pipe 6, be drilled with the hole, an end car has outer sawtooth button screw thread, and other end car has external screw thread; From lock tube 8, be drilled with the hole from lock tube 30, car has groove and interior sawtooth button screw thread, and the following vertical equal portions of interior sawtooth button screw thread mill out; Be drilled with the hole on piston 9, piston 29, the piston 39, attacked internal thread hole, inside and outside round car has groove; Central tube 25 cars have external screw thread, are drilled with the hole; Self-locking pipe 31 has been attacked internal thread hole, and car has outer sawtooth button screw thread; Setting pipe 36 is drilled with the hole, has groove, and car has external screw thread; Stay pipe 40 has groove, and the upper end car has internal thread, and the lower end car has taper seat; Slips 41 is that the top internal diameter is big, is drilled with the hole, and car has groove, and the bottom car has internal conical surface, the cylindrical card tooth of having got on the bus, and the following vertical equal portions of groove mill out.

Top connection 1 is threaded with central tube 2, pressure cap 3 is threaded with central tube 2, cylinder head 4 is threaded with central tube 2, cylinder barrel 5, O shape circle 7 is packed in the groove of piston 9, piston 9 is packed in the annular space of central tube 2 and cylinder barrel 5, pin 14 is threaded with piston 9, and piston 9 is fixed on the central tube 2, forms the top of sending into assembly by above-mentioned parts and sets hydraulic force mechanism; Cylinder head 35 is threaded with central tube 25, cylinder barrel 32, O shape circle 34 is packed in the groove of piston 29, piston 29 is packed in the annular space of central tube 25 and cylinder barrel 32, pin 27 is threaded with piston 29, and piston 29 is fixed on the central tube 25, form the bottom of sending into assembly by above-mentioned parts and set hydraulic force mechanism; Cylinder head 44 is threaded with central tube 25, cylinder barrel 42, O shape circle 43 is packed in the groove of piston 39, piston 39 is packed in the annular space of central tube 25 and cylinder barrel 42, pin 38 is threaded with piston 39, and piston 39 is fixed on the central tube 25, form the bottom grappling hydraulic force mechanism of sending into assembly by above-mentioned parts; Central tube 2, box cupling 16, central tube 17, box cupling 21, central tube 25, ball-and-seat 45 are linked in sequence successively, form the assembly of sending into of the present invention by above-mentioned parts.Between box cupling 16 and box cupling 21, can increase or reduce the quantity of central tube and box cupling according to the length of designing requirement plugged well section, make the length of sending into assembly reach the length of requirement plugged well section.Packing element 11, spacer ring 12, baffle ring 13 are enclosed within on the setting pipe 6, pin 15 is threaded with baffle ring 13, and baffle ring 13 is fixed on the setting pipe 6, is threaded with setting pipe 6 from lock tube 8, and with packing element 11, spacer ring 12 clampings, the top of being made of the packer assembly above-mentioned parts sets and self-locking mechanism; Baffle ring 23, packing element 24, spacer ring 26, be enclosed within on the setting pipe 36 from lock tube 30, pin 22 is threaded with baffle ring 23, and baffle ring 13 is fixed on the setting pipe 36, self-locking pipe 31 is enclosed within on the setting pipe 36, and be threaded from lock tube 30, packing element 24, spacer ring 26 clamped, pin 33 is threaded with self-locking pipe 31, and self-locking pipe 31 is fixed on the setting pipe 36, the bottom of being made of the packer assembly above-mentioned parts sets and self-locking mechanism; Stay pipe 40 is threaded with setting pipe 36, and slips 41 is enclosed within on the stay pipe 40, is made of the anchor mechanism of packer assembly above-mentioned parts; Setting pipe 6, box cupling 18, setting pipe 19, box cupling 20, setting pipe 36 are linked in sequence successively, form packer assembly of the present invention by above-mentioned parts.Between box cupling 18 and box cupling 20, can be according to the length of designing requirement plugged well section, increase or reduce the quantity of central tube and box cupling, make the length of packer assembly reach the length of requirement plugged well section.Sending into assembly packs in the packer assembly, trundle 10, trundle 28 and trundle 37 pass the chute (A1) of setting pipe 6 respectively, from lock tube 8, chute (A2), the hole of slips 41 and the chute (A3) of stay pipe 40 from lock tube 30, setting pipe 36, with being threaded on piston 9, piston 29 and the piston 39, just formed large orifice releasing packer.

The mode that install and use at scene of the present invention is achieved in that when site operation uses, length according to designing requirement plugged well section, ground configure of the present invention send into assembly and packer assembly length after, by the outer connected mode in back in the elder generation, connect successively and G.I.H, top connects tubing string, routinely under the program after the designing requirement degree of depth, seated well head connects pump truck and pumps into clear water and suppress; Pressure transmission hole Ф 1, pressure transmission hole Ф 2 and the pressure transmission hole Ф 3 of pressure through sending into assembly transfers the pressure to piston 9, piston 29 and piston 39; Behind piston 9, piston 29 and piston 39 pressurizeds, at first pin 14, pin 27 and pin 38 are cut off, afterwards, piston 9, piston 29 and piston 39 are just by trundle 10, trundle 28 and trundle 37, promotion is from lock tube 8, from lock tube 30 and slips 41 displacements, packing element 11, packing element 24 and the spacer ring 12, the spacer ring 26 that make the packer assembly set and self-locking the packing element 11 of packer assembly, packing element 24 compressions by the inward at both ends side shifting; Slips 41 is moved up along the outer conical surface of stay pipe 40, make the slips spreading and the grappling of slips 41; When pressure rose to certain value, trundle 10 and trundle 37 were at first cut off respectively, and after trundle 10 and trundle 37 were cut off, piston 9 moved down into box cupling 16 and is blocked and stops to move; Moving on to cylinder head 35 on the piston 39 is blocked and stops to move; When pressure continued to rise to certain value again, trundle 28 was cut off, and piston 29 is released cylinder barrel, and the hole φ 2 that plays the draining effect is opened; When trundle 28 was cut off, owing on packer assembly top there be stopping of pressure cap 3, the packer assembly can not be subjected to displacement or deblocking, can guarantee that trundle 28 is cut off smoothly; So far, set, the grappling process finishes.Set, after the grappling process finishes, send into assembly and packer assembly and break away from, afterwards, program trips out in the well tubing string and sends into assembly routinely, the packer assembly is lost in well get final product.Multistage shutoff, as stated above, shutoff gets final product step by step from bottom to top.When oil well because of other measure or reason, in the time of packer assembly deblocking need being tripped out, be lowered to fishing tool, drag on the back and carry, pulling force increases 〉=100KN gets final product smooth deblocking and trips out.

Claims

1. large orifice releasing packer; By top connection (1), central tube (2), pressure cap (3), cylinder head (4), cylinder barrel (5), setting pipe (6), O shape circle (7) is from lock tube (8), piston (9), trundle (10), packing element (11), spacer ring (12), baffle ring (13), pin (14), pin (15), box cupling (16), central tube (17), box cupling (18), setting pipe (19), box cupling (20), box cupling (21), pin (22), baffle ring (23), packing element (24), central tube (25), spacer ring (26), pin (27), trundle (28), piston (29), from lock tube (30), self-locking pipe (31), cylinder barrel (32), pin (33), O shape circle (34), cylinder head (35), setting pipe (36), trundle (37), pin (38), piston (39), stay pipe (40), slips (41), cylinder barrel (42), O shape circle (43), cylinder head (44), ball-and-seat (45) is formed; It is characterized in that: top connection (1), central tube (2), pressure cap (3), cylinder head (4), cylinder barrel (5), O shape circle (7), piston (9), pin (14) are linked in sequence successively, form the top of sending into assembly and set hydraulic force mechanism; Central tube (25), pin (27), piston (29), cylinder barrel (32), O shape circle (34), cylinder head (35) are linked in sequence successively, form the bottom of sending into assembly and set hydraulic force mechanism; Central tube (25), pin (38), piston (39), cylinder barrel (42), O shape circle (43), cylinder head (44) are linked in sequence successively, form the grappling hydraulic force mechanism of sending into assembly; Central tube (2), box cupling (16), central tube (17), box cupling (21), central tube (25), ball-and-seat (45) are linked in sequence successively, form the assembly of sending into of the present invention by above-mentioned parts; Between box cupling (16) and box cupling (21), can increase or reduce the quantity and the length of central tube and box cupling according to the length of designing requirement plugged well section, make the length of sending into assembly reach the length of requirement plugged well section; Setting pipe (6), be linked in sequence successively from lock tube (8), packing element (11), spacer ring (12), baffle ring (13), pin (15), the top of forming the packer assembly sets and self-locking mechanism; Pin (22), baffle ring (23), packing element (24), spacer ring (26), be linked in sequence successively from lock tube (30), self-locking pipe (31), pin (33), setting pipe (36), the bottom of forming the packer assembly sets and self-locking mechanism; Setting pipe (36), stay pipe (40), slips (41) are linked in sequence successively, form the anchor mechanism of packer assembly; Setting pipe (6), box cupling (18), setting pipe (19), box cupling (20), setting pipe (36) are linked in sequence successively, form packer assembly of the present invention by above-mentioned parts; Between box cupling (18) and box cupling (20), can be according to the length of designing requirement plugged well section, increase or reduce the quantity of central tube and box cupling, make the length of packer assembly reach the length of requirement plugged well section; Sending into assembly packs in the packer assembly, trundle (10), trundle (28) and trundle (37) pass the chute (A1) of setting pipe (6) respectively, from lock tube (8), chute (A2), the hole of slips (41) and the chute (A3) of stay pipe (40) from lock tube (30), setting pipe (36), with being threaded on piston (9), piston (29) and the piston (39), just formed large orifice releasing packer.

2. large orifice releasing packer according to claim 1 is characterized in that: central tube (2) external screw thread of having got on the bus is drilled with the hole; Cylinder head (4), cylinder head (35), cylinder head (44) internal and external screw thread of having got on the bus; Setting pipe has groove on (6), is drilled with the hole, and an end car has outer sawtooth button screw thread, and other end car has external screw thread; From lock tube (8), be drilled with the hole from lock tube (30), car has groove and interior sawtooth button screw thread, and the following vertical equal portions of interior sawtooth button screw thread mill out; Piston (9), piston (29), piston are drilled with the hole on (39), have attacked internal thread hole, and inside and outside round car has groove; Central tube (25) car has external screw thread, is drilled with the hole; Self-locking pipe (31) has been attacked internal thread hole, and car has outer sawtooth button screw thread; Setting pipe (36) is drilled with the hole, has groove, and car has external screw thread; Stay pipe (40) has groove, and the upper end car has internal thread, and the lower end car has taper seat; Slips (41) is that the top internal diameter is big, is drilled with the hole, and car has groove, and the bottom car has internal conical surface, the cylindrical card tooth of having got on the bus, and the following vertical equal portions of groove mill out.

3. large orifice releasing packer according to claim 1 is characterized in that: set, after the grappling process finishes, send into assembly and packer assembly and break away from.