CN-115613983-B - Plunger gas lift fastener and matched throwing and fishing tool

CN115613983BCN 115613983 BCN115613983 BCN 115613983BCN-115613983-B

Abstract

The invention discloses a plunger gas lift clamp and a matched throwing and fishing tool, and relates to the field of oil and gas field exploitation equipment. The buffer rod is of a hollow structure, a transmission rod is arranged at the axis of the buffer rod in a sliding mode, and the top end of the transmission rod is connected with the bottom end of the casting and fishing connecting rod. The locking device changes the locking mode from the passive mode in the prior art to the active mode, and realizes locking or unlocking of the locking device by controlling the throwing and fishing connecting assembly. The matched throwing and fishing tool is matched with the well, so that the locking of the oil pipe at the appointed positions in the highly-inclined well and the horizontal well can be realized, the matched throwing and fishing tool can be smoothly separated from the locking device after the locking, and the risk that the throwing and fishing device brings the locking device out is reduced.

Inventors

YAN JIE
LUO XIN
CHEN MAN
LIU MENGYUN
CAI ZIJIAN
WANG MINGHUI
JING AIWEN
HUANG JINGMING

Assignees

托普威尔石油技术股份公司

Dates

Publication Date: 20260505
Application Date: 20220906

Claims (6)

1. The plunger gas lift clamp is characterized by comprising a throwing and fishing connecting component, a buffer rod (2) and a clamping component; The casting and fishing connecting assembly comprises a hollow fixed head (11), wherein a casting and fishing connecting rod (12) is arranged at the axis of the fixed head (11) in a sliding manner, the top end of the casting and fishing connecting rod (12) extends out of the fixed head (11), the bottom end of the fixed head (11) is fixedly connected with the coaxial center of the buffer rod (2), the buffer rod (2) is of a hollow structure, a transmission rod (13) is arranged at the axis of the buffer rod (2) in a sliding manner, the top end of the transmission rod (13) is connected with the bottom end of the casting and fishing connecting rod (12), and the bottom end of the transmission rod (13) is connected with the clamping assembly; when the throwing and fishing connecting rod (12) drives the transmission rod (13) to ascend, the clamping component performs clamping, and when the throwing and fishing connecting rod (12) drives the transmission rod (13) to fall, the clamping component performs releasing the clamping; the clamping assembly comprises a shell (31), wherein the top end of the shell (31) is connected with a buffer rod (2), two slips (32) are symmetrically arranged on the shell (31), the two slips (32) are in sliding fit with the shell (31), an inclined table (131) is fixedly connected to the bottom end of a transmission rod (13), the top end of the inclined table (131) is fixedly connected with the transmission rod (13), the width of the top end of the inclined table (131) is smaller than that of the bottom end of the inclined table (131), one side, close to the inside of the shell (31), of each slip (32) is respectively attached to inclined planes on two sides of the inclined table (131), and the slips (32) are in sliding fit with the inclined table (131); A glue barrel (33) is sleeved on the shell (31), and the glue barrel (33) is positioned at the bottom end of the slip (32); The buffer rod (2) is in sliding fit with the buffer tube (34), a lug (21) is arranged at the bottom end of the buffer rod (2), a chute (35) for the lug (21) to move along the length direction of the buffer rod (2) is arranged on the inner wall of the buffer tube (34), a buffer spring (36) is sleeved on the buffer rod (2), the top end of the buffer spring (36) is abutted with the fixed head (11), the bottom end of the buffer spring (36) is abutted with the buffer tube (34), and a single-flow valve (37) is further arranged at the lower end of the shell (31); The top end of the transmission rod (13) is provided with a sliding cavity (132) along the length direction, a piston (133) is arranged in the sliding cavity (132), the piston (133) slides along the length direction in the sliding cavity (132), the bottom end of the casting and fishing connecting rod (12) stretches into the sliding cavity (132) to be fixedly connected with the piston (133), and the casting and fishing connecting rod (12) is in sliding fit with the transmission rod (13).
2. The plunger gas lift fastener according to claim 1, wherein a first clamping ring (111) is arranged at the upper end of the fixing head (11), a hollow round table (112) is arranged at the top end of the first clamping ring (111), the diameter of the top end of the hollow round table (112) is smaller than that of the bottom end of the hollow round table (112), and the diameter of the bottom end of the hollow round table (112) is identical to the outer diameter of the first clamping ring (111).
3. The matched throwing and fishing tool for the plunger gas lift clamp of any one of claims 1-2 is characterized by comprising a throwing and fishing shell (41), wherein a connecting buckle (42) connected with a steel wire working tool is arranged at the top end of the throwing and fishing shell (41), a throwing and fishing assembly connected with a fixed head (11) and a throwing and fishing connecting rod (12) is arranged at the bottom end of the throwing and fishing shell (41), and a torque motor unit for driving the throwing and fishing assembly and a high-temperature battery (43) for supplying power for the torque motor unit and the throwing and fishing assembly are arranged in the throwing and fishing shell (41); The casting and fishing assembly comprises a fishing assembly body, the fishing assembly body comprises a plurality of first casting and fishing claws (51) and telescopic rods (52), the plurality of first casting and fishing claws (51) are uniformly distributed at intervals along the axis of a casting and fishing shell body (41), the torque motor unit drives the plurality of first casting and fishing claws (51) to shrink towards the center, the bottom ends of the first casting and fishing claws (51) are provided with hooks matched and connected with a fixed head (11), the telescopic rods (52) are arranged in the casting and fishing shell body (41), and the bottom ends of the telescopic rods (52) extend out of the casting and fishing shell body (41) to be in butt joint with the top ends of casting and fishing connecting rods (12).
4. The matched casting and fishing tool according to claim 3, wherein the casting and fishing assembly comprises a casting assembly, the casting assembly comprises a plurality of second casting and fishing claws (61) and a grabbing assembly used for fixing the casting and fishing connecting rod (12), the plurality of second casting and fishing claws (61) are uniformly distributed at intervals along the axis of the casting and fishing shell (41), hooks matched and connected with the fixing head (11) are arranged at the bottom end of the second casting and fishing claw (61), electric push rods (62) are arranged at the top ends of the plurality of second casting and fishing claws (61), the torque motor unit drives the plurality of electric push rods (62) to shrink towards the center, a supporting block (63) is arranged on one side, close to the axis of the casting and fishing shell (41), of the second casting and fishing claw (61), and the supporting block (63) is in supporting connection with the top end of the fixing head (11).
5. The matched casting and fishing tool according to claim 4, wherein the grabbing assembly comprises a plurality of grabbing claws (64), the grabbing claws (64) are uniformly distributed at intervals along the axis of the casting and fishing shell (41), the grabbing claws (64) are arranged at intervals with the second casting and fishing claw (61), and the torque motor unit drives the grabbing claws (64) to retract towards the center.
6. The matched casting and fishing tool according to claim 4, wherein the grabbing component comprises a rotating rod (65), the torque motor group drives the rotating rod (65) to rotate along an axis, a threaded hole (651) is formed in the bottom end of the rotating rod (65), threads (122) matched and connected with the threaded hole (651) are formed in the top end of the casting and fishing connecting rod (12), a limiting structure for limiting the casting and fishing connecting rod (12) to rotate along the axis is further arranged, the limiting structure comprises a limiting block arranged on the fixed head (11), and a limiting chute (35) for enabling the limiting block to slide is formed in the casting and fishing connecting rod (12) along the length direction.

Description

Plunger gas lift fastener and matched throwing and fishing tool Technical Field The invention relates to the field of oil and gas field exploitation equipment, in particular to a plunger gas lift clamp and a matched throwing and fishing tool. Background Plunger gas lift is used as a drainage gas production process of a gas well, and is widely applied to various large oil and gas fields at present. The plunger gas lift drainage gas production process is to put a plunger in a gas well oil pipe, and utilize the self energy of the gas well to push the plunger to reciprocate in the oil pipe, so that periodic liquid lift is realized, and the plunger is used as a mechanical interface, so that gas channeling and liquid slipping can be effectively prevented, and the lifting efficiency is improved. The steel wire rope is used to operate the down-loading clamping device to be clamped in the oil pipe before the plunger is put in operation, and the currently used clamping mode of the down-hole clamping device is mainly divided into a slip type clamping device and a coupling type clamping device. The conventional slip type pipe column has high requirements on the cleanliness of the inner wall of the pipe column, or the pipe column is easy to seat in the middle and cannot be lowered to the designed depth; In the prior art, the release of the locking device is usually carried out by connecting a JDC seat release tool by using a steel wire working tool, but the locking device is separated by downward jarring of a shearing pin during release, when the locking device of a horizontal well and a high inclination angle of more than 40 degrees is released, the risk that the shearing pin cannot be released by jarring exists in both the slip type locking device and the coupling type locking device, so that the release position of the locking device cannot fall to a high inclination well section, the liquid draining effect of a plunger is poor, and the steel wire working tool is recovered without releasing the hand of the shearing pin, the locking device is taken out of an oil pipe again, and the success rate of locking is low. Meanwhile, because the clamping principle of the slip type clamp in the prior art is that the slip is unfolded by downward shock, the relative position of the clamp and the oil pipe is easy to move when the slip and the oil pipe are not clamped in place, so that the clamp leaves the designed position, and the success rate of the plunger gas lift implementation process is low. Disclosure of Invention The invention provides a slip type plunger gas lift clamp capable of being smoothly put into and taken out of a highly-inclined well and a horizontal well and a matched putting-in and taking-out tool. In order to achieve the aim of the invention, the invention adopts the following technical scheme: The plunger gas lift clamping device comprises a casting and fishing connecting component, a buffer rod and a clamping component; the throwing and fishing connecting assembly comprises a hollow fixed head, wherein a throwing and fishing connecting rod is arranged at the axial center of the fixed head in a sliding way, the top end of the throwing and fishing connecting rod extends out of the fixed head, the bottom end of the fixed head is fixedly connected with the coaxial center of the buffer rod, the buffer rod is of a hollow structure, a transmission rod is arranged at the axial center of the buffer rod in a sliding way, and the top end of the transmission rod is connected with the bottom end of the throwing and fishing connecting rod; when the throwing and fishing connecting rod drives the transmission rod to ascend, the clamping component executes clamping, and when the throwing and fishing connecting rod drives the transmission rod to fall, the clamping component executes releasing the clamping. Further, the clamping assembly comprises a shell, and the top end of the shell is connected with the buffer rod; the device comprises a shell, a driving rod, a sloping platform, two slips, a sloping platform and a sliding platform, wherein the two slips are symmetrically arranged on the shell and are in sliding fit with the shell; The shell is also sleeved with a rubber barrel, and the rubber barrel is positioned at the bottom end of the slip. Further, a buffer cylinder is arranged at the top end of the shell, the buffer rod is in sliding fit with the buffer cylinder, a protruding block is arranged at the bottom end of the buffer rod, a sliding groove for the protruding block to move along the length direction of the buffer rod is arranged on the inner wall of the buffer cylinder, a buffer spring is sleeved on the buffer rod, the top end of the buffer spring is abutted to the fixing head, the bottom end of the buffer spring is abutted to the buffer cylinder, and a check valve is further arranged at the lower end of the shell. Further, a sliding cavity is formed in the top end of the transmission rod along the length directi