CN-121993151-A - Laying method and anchoring device of photoelectric composite cable in horizontal well

CN121993151ACN 121993151 ACN121993151 ACN 121993151ACN-121993151-A

Abstract

The invention provides a laying method and an anchoring device of a photoelectric composite cable in a horizontal well. A method for laying photoelectric composite cable in horizontal well includes connecting short-joint with oil pipe, lowering the short-joint with oil pipe, connecting logging instrument with photoelectric composite cable anchoring device by composite optical cable, lowering logging instrument with photoelectric composite cable anchoring device from top of oil pipe, pushing anchoring arm and connecting rod out of supporting arm main body by power unit, pulling up photoelectric composite cable anchoring device to clamp photoelectric composite cable anchoring device on bottom of short-joint, connecting short-joint to oil pipe, connecting production string, oil-well pump, tail pipe and short-joint to short-joint, pushing photoelectric composite cable anchoring device to measuring position by drill pipe transmission technology, pushing out anchoring arm and connecting rod by power unit until anchoring arm is on casing wall, lifting oil pipe, withdrawing anchoring arm and connecting rod by power unit, and completing well by sucker rod.

Inventors

MU HONGXU
YANG QINGJIAN
ZHANG HAIJUN
LIU SHICHAO
LI XIAOLIANG
DUAN PIN
WANG KAI
WANG DONGSHENG
GUO SHUAI
JI XIAOJUAN
XU QING
XU RUI
TAN SONG
SHEN QIANGANG
LI BING

Assignees

中国石油天然气集团有限公司
中国石油集团测井有限公司

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (10)

1. A method of laying an optical-electrical composite cable in a horizontal well, comprising: s1, connecting a landing nipple with an oil pipe, and descending the landing nipple and the oil pipe into a well; S2, connecting the logging instrument and the photoelectric composite cable anchoring device by using a composite optical cable, and descending the logging instrument and the photoelectric composite cable anchoring device from the top of the oil pipe until a short joint at the tail part of an oil outlet pipe below the logging instrument and the photoelectric composite cable anchoring device; s3, pushing the anchoring arm and the connecting rod out of the supporting arm main body through the power component, wherein the unfolding width of the anchoring arm is larger than that of the oil pipe and smaller than the inner diameter of the sleeve; S4, pulling up the photoelectric composite cable anchoring device to clamp the photoelectric composite cable anchoring device at the bottom of the landing nipple; S5, connecting the bypass nipple to the oil pipe; s6, connecting the production string, the oil pump, the lower tail pipe of the pump and the plugging nipple to the upper part of the bypass nipple, and pushing the photoelectric composite cable anchoring device to a measuring position by adopting a drill rod transmission process; S7, after the photoelectric composite cable anchoring device is pushed to the measuring position, the anchoring arm and the connecting rod are pushed out continuously through the power component until the anchoring arm is anchored on the casing wall; s8, lifting the oil pipe until the oil pump reaches a preset depth, wherein the lower depth of the oil pump in the pushing process is not more than 40 degrees; S9, the anchoring arm and the connecting rod are retracted through the power component, and the photoelectric composite cable anchoring device is retracted; s10, completing the well by using a sucker rod.
2. The method of laying a photoelectric composite cable in a horizontal well according to claim 1, wherein in the laying process, the working process of the photoelectric composite cable anchoring device is as follows: When the anchoring arm and the connecting rod need to be pushed out, the anchoring arm and the connecting rod are pushed out of the supporting arm main body through the power component; observing the real-time current of the power component; When the real-time current of the power component reaches a preset value, the power component is closed, wherein the preset value is 350mA; when the anchoring arm and the connecting rod need to be recovered, the anchoring arm and the connecting rod are recovered into the supporting arm main body through the power component; observing the real-time current of the power component; And closing the power component when the real-time current of the power component reaches a preset value, wherein the preset value is 350mA.
3. An anchoring device of a photoelectric composite cable in a horizontal well is characterized by comprising an upper joint assembly, a power system assembly, a shell, a movement mechanism assembly and a lower joint assembly, wherein the upper joint assembly is connected with the shell, the power system assembly is installed in the shell, the power system assembly is connected with the movement mechanism assembly, the movement mechanism assembly is connected with the lower joint assembly, a power component is installed in the power system assembly, a supporting arm main body, an anchoring arm and a connecting rod are installed in the movement mechanism assembly, one end of the anchoring arm is connected with the power component, one end of the connecting rod is hinged with the other end of the anchoring arm, an opening is formed in the supporting arm main body, adjacent to the connecting rod and the hinging position of the anchoring arm, and the other end of the connecting rod is hinged with the supporting arm main body.
4. An anchoring device for a photoelectric composite cable in a horizontal well according to claim 3, wherein the upper connector assembly comprises a photoelectric composite cable, an upper connector, a torpedo, a connecting cylinder, a high-voltage contact pin, an adapter and a split spiral ring, the upper connector is connected with the connecting cylinder, the connecting cylinder is connected with the adapter, the split spiral ring is installed on the adapter, the split spiral ring is connected with the shell, one end of the photoelectric composite cable penetrates through the upper connector, the torpedo is located in the upper connector, the torpedo is sleeved on the photoelectric composite cable, the high-voltage contact pin is installed in the adapter, and the high-voltage contact pin is connected with one end of the photoelectric composite cable.
5. The anchoring device of the photoelectric composite cable in the horizontal well according to claim 4, wherein the upper connector is connected with the connecting cylinder through threads, the connecting cylinder is connected with the adapter through threads, and a black rubber sleeve and a jack are installed in the adapter and are opposite to the high-voltage contact pin.
6. The anchoring device of the photoelectric composite cable in the horizontal well according to claim 3 is characterized in that the power component is a direct current motor, the direct current motor is connected with a speed reducer, the direct current motor is connected with a ground control box, a motor switch for controlling the start and stop of the direct current motor and a display screen for displaying the current of the direct current motor are arranged on the ground control box, the power system component is connected with the movement mechanism component through a first fixed sleeve, and the movement mechanism component is connected with the lower joint component through threads.
7. The anchoring device for the photoelectric composite cable in the horizontal well according to claim 6, wherein the power system component comprises a motor shell, a shaft coupling, a bearing shell, a bearing gasket, a trapezoidal screw rod, an open needle bearing, a thrust needle bearing, a second fixing sleeve and a three-core socket, the direct current motor is installed in the motor shell through a screw, a top opening and a bottom opening are formed in the bearing shell, the open needle bearing and the bearing gasket are installed in the bottom opening of the bearing shell, the thrust needle bearing is installed in the top opening of the bearing shell, the direct current motor is connected with the trapezoidal screw rod through the shaft coupling, the trapezoidal screw rod is connected with one end of the anchoring arm, the bearing gasket and the open needle bearing are sleeved on the outer side of the trapezoidal screw rod, the motor shell is connected with the bearing shell through the second fixing sleeve, and the three-core socket is connected with the motor shell through a screw.
8. An anchoring device for a photoelectric composite cable in a horizontal well according to claim 3, wherein the movement mechanism assembly comprises a screw shell, a guide key, a screw push rod, a third fixing sleeve and a screw sleeve, wherein the screw push rod is slidably installed in the screw shell through the guide key, the screw push rod is connected with the power component, the screw sleeve is installed in the support arm main body through threads, the screw sleeve is sleeved on the screw push rod, and the screw shell is connected with the support arm main body through the third fixing sleeve.
9. The anchoring device of the photoelectric composite cable in the horizontal well according to claim 8, wherein one end of the connecting rod is hinged to the other end of the anchoring arm through a main arm and auxiliary arm connecting pin, a fixing pin is installed on the nut push rod, one end of the anchoring arm is rotatably connected with the fixing pin, and the other end of the connecting rod is hinged to the supporting arm main body through an auxiliary arm connecting pin.
10. An anchoring device for a photoelectric composite cable in a horizontal well according to claim 3, wherein the lower connector assembly comprises a lower connector, a spacer sleeve, a plug connector, a spacer ring, a bottom nose and a banana plug, the spacer sleeve is installed in the lower connector, the plug connector is connected with the banana plug through threads, the plug connector is installed in the spacer sleeve with the banana plug, the spacer ring is abutted with the plug connector, and the lower connector is connected with the bottom nose through threads.

Description

Laying method and anchoring device of photoelectric composite cable in horizontal well Technical Field The invention relates to the technical field of petroleum logging, in particular to a laying method and an anchoring device of a photoelectric composite cable in a horizontal well. Background The optical fiber sensing technology is a novel sensing technology which is rapidly developed along with the development of the optical fiber communication technology, and a plurality of optical fiber sensing systems are put into practical use and become commodities for replacing the traditional sensors. The optical fiber sensor can be used for monitoring downhole parameters (pressure, temperature and multiphase flow), acoustic wave monitoring, laser optical fiber nuclear logging and the like, and is widely applied to petroleum logging. The photoelectric composite cable is a combination of optical fibers and a common cable, is not only an important channel for hanging heavy connection and transmitting measurement data between a ground system and underground instruments, but also can be directly used as a sensor or connected with a professional optical sensor, so that the photoelectric composite cable has incomparable advantages in logging application. In the vertical well operation process, the logging instrument and the photoelectric composite cable can reach a target layer by means of gravity, and the composite optical cable and the detecting instrument can be conveyed to a target layer section of the horizontal well by using a certain tool during the horizontal well test, so that the test and the data acquisition are performed. At present, in the old horizontal well optical fiber test construction, an optical fiber is paved by using a crawler dragging or continuous oil pipe pushing process, and the crawler or the continuous oil pipe cannot lift out of a wellhead before the test is finished, so that the process method has the defects of long equipment occupation time, incapability of taking short boards such as full data and the like due to equipment damage, and can not meet the requirements of rapid development and large-scale popularization of optical fiber technology. In the prior art, the conveying problem of a horizontal well photoelectric composite cable and a logging instrument is not solved, and equipment for effectively and low-cost solving optical devices in underground long-term monitoring of the horizontal well at home and abroad is not yet found. Disclosure of Invention The invention aims to solve the technical problem of providing a laying method and an anchoring device of an photoelectric composite cable in a horizontal well aiming at the defects of the prior art. The technical scheme includes that the laying method of the photoelectric composite cable in the horizontal well comprises the following steps of S1, connecting a landing nipple and an oil pipe, descending the landing nipple and the oil pipe, S2, connecting a logging instrument and a photoelectric composite cable anchoring device by using a composite optical cable, descending the logging instrument and the photoelectric composite cable anchoring device from the top of the oil pipe until the landing nipple at the tail of an oil outlet pipe of the logging instrument and the photoelectric composite cable anchoring device, S3, pushing an anchoring arm and a connecting rod out of a supporting arm main body through a power component, wherein the expansion width of the anchoring arm is larger than that of the oil pipe and smaller than the inner diameter of a sleeve, S4, pulling the photoelectric composite cable anchoring device upwards to enable the photoelectric composite cable anchoring device to be clamped at the bottom of the landing nipple, S5, connecting a bypass nipple to the oil pipe, S6, connecting a production string, an oil pump, a tail pipe below the pump and the upper part, pushing the photoelectric composite cable anchoring device to a measuring position by adopting a transmission process, S7, pushing the anchoring arm and the connecting rod out of the supporting arm through the power component after the composite cable anchoring device is pushed to the measuring position, and the anchoring arm is pushed out of the supporting arm and the connecting rod until the anchoring arm is not pulled out of the supporting arm and the supporting arm is pulled up to reach the depth of the sleeve, S9, and the anchoring arm is pulled up to reach the depth of the well through the power component and the well is not pulled, and the well is pulled up to reach the depth of the anchoring arm is reached, and the depth is reached. The technical scheme has the beneficial effects that the photoelectric composite cable is conveniently distributed to the horizontal section of the oil-gas well through the oil pipe, and the photoelectric composite cable is suitable for scenes with longer straight well sections and shallower pushing depth. The photoelectric compo