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CN-121993062-A - Recyclable grouting device, system and grouting method

CN121993062ACN 121993062 ACN121993062 ACN 121993062ACN-121993062-A

Abstract

The invention discloses a recyclable grouting device, a recyclable grouting system and a recyclable grouting method, and belongs to the technical field of petroleum and natural gas drilling equipment. The method has the advantages of realizing effective grouting operation in the drilling tool and the casing string, further avoiding the generation of compressed air in the drilling tool and the casing string, being convenient for accurately judging overflow during and after the operation of the drilling tool and the casing string in the field, circulating drilling fluid in the well without connecting a square drill rod or a top driving device, reducing operation procedures, improving underground safety, avoiding sand setting and sticking caused by long rest time of the drilling tool or the casing in the open hole section operation, reducing and preventing accidents of the underground and equipment, and the like.

Inventors

  • HE YULONG
  • FAN FAN
  • ZHANG YONG
  • DONG ZHONGJUN
  • Tao Shanxuan
  • LEI ZHENLIN
  • HE MINGMIN
  • MAO DAN
  • ZHENG YONGJUN
  • SUN YUEMING

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团川庆钻探工程有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (10)

  1. 1. The recyclable grouting device is characterized by comprising a barrel (5) and a joint (6) arranged at the lower end of the barrel (5), wherein the barrel (5) is communicated with the joint (6), and the barrel (5) and the joint (6) are arranged on the same longitudinal axis; The cylinder (5) is internally sleeved with a liquid inlet pipe (7), the upper section of the liquid inlet pipe (7) extends outwards of the cylinder (5) and is in sealing arrangement with the cylinder (5), and the lower section of the liquid inlet pipe (7) sequentially penetrates through the cylinder (5) and the joint (6) and extends outwards of the joint (6), the cylinder (5) is connected with an exhaust pipe, a gate valve (3) is arranged on the exhaust pipe, and a continuous channel for judging that a water hole is full is formed among an inner cavity of the joint (6), the inner cavity of the cylinder (5) and the exhaust pipe by discharging compressed air and returning drilling fluid; The lower section of the liquid inlet pipe (7) is eccentrically arranged, the end face of the liquid outlet on the liquid inlet pipe (7) is obliquely arranged in the direction right upwards, and the end face of the liquid outlet on the liquid inlet pipe (7) deviates from the direction of the exhaust pipe.
  2. 2. The recyclable grouting device according to claim 1, wherein the angle between the end face of the liquid outlet on the liquid inlet pipe (7) and the longitudinal axis is 20-30 degrees.
  3. 3. The recyclable grouting device according to claim 1, wherein the distance between the liquid inlet pipe (7) and the inner wall of the joint (6) is not less than 10mm, and the distance between the top of the liquid outlet end face and the bottom of the joint (6) is 18-22 mm.
  4. 4. The recyclable grouting device according to claim 1, wherein the upper section of the liquid inlet pipe (7) is fixed at the top of the barrel (5), and the exhaust pipe is connected with the top of the barrel (5) or the upper part of the barrel (5).
  5. 5. The recyclable grouting device according to claim 1, wherein the inlet (1) of the liquid inlet pipe (7) is sleeved with a union I, and the exhaust port (2) of the exhaust pipe is sleeved with a union II.
  6. 6. The recyclable grouting device as claimed in claim 1, wherein the cylinder (5) is provided with two handles (4), the handles (4) are provided on opposite sides of the cylinder (5), and the handles (4) are semicircular.
  7. 7. A recyclable grouting apparatus according to claim 1, wherein the joint (6) is associated with a borehole tool (13) or casing.
  8. 8. A recyclable grouting system, characterized in that it is arranged in a drilling system comprising a derrick (10), a trolley (8), a top drive (19), a connection nipple (11) for rotating and transporting drilling fluid, an elevator (12), a roof gutter (20) and a wellhead (21); The grouting system comprises a grouting device (16) and a circulating tank (17) according to any one of claims 1-7, wherein an elevator (12) seats an in-well drilling tool (13) or a casing on a turntable surface, a joint (6) in the grouting device (16) is connected with the drilling tool (13) or the casing, an exhaust port (2) on the grouting device (16) is connected with the circulating tank (17) through an exhaust high-pressure hose (14), and a liquid inlet pipe (7) on the grouting device (16) is connected with the circulating tank (17) through a liquid inlet high-pressure hose (15); The liquid inlet high-pressure hose (15) is fixed on the derrick (10) through the pipeline distributor (9).
  9. 9. The recyclable grouting system as claimed in claim 8, wherein the feed high pressure hose (15) is provided with a transfer pump (18).
  10. 10. A recyclable grouting method, comprising the steps of: s1, calculating the theoretical water hole volume of a non-grouting drilling tool (13) or a casing in a well; S2, using an elevator (12) to sit a drilling tool (13) or a casing pipe which is not grouted in the drilling well on the surface of the turntable; S3, connecting a joint (6) in the grouting device (16) with a drilling tool (13) or a sleeve, and communicating the grouting device (16) with a conveying pump (18) through a liquid inlet high-pressure hose (15), and communicating the grouting device (16) with a circulating tank (17) through an exhaust high-pressure hose (14); s4, opening a gate valve (3); s5, starting a conveying pump (18), grouting, wherein the discharge capacity of the pump is 1/5-1/4 of the discharge capacity used in the drilling process; s6, after grouting for three times, detecting whether drilling fluid returns to the air vent (2), and stopping grouting operation if the drilling fluid returns; The first grouting is stopped when the grouting amount is 1/4-5/12 of the total grouting amount, and the grouting is stopped until the air outlet (2) on the grouting device (16) is not discharged; The second grouting is that when the total grouting amount is 1/4-5/12 of the total grouting amount, the grouting is stopped until the air outlet (2) on the grouting device (16) is not discharged; filling residual slurry, stopping a delivery pump (18), and sequentially removing the exhaust high-pressure hose (14), the liquid inlet high-pressure hose (15) and the grouting device (16); and S7, continuing the drill-down operation.

Description

Recyclable grouting device, system and grouting method Technical Field The invention relates to a grouting device, in particular to a recyclable grouting device, system and grouting method for meeting the actual production requirements on site, and belongs to the technical field of petroleum and natural gas drilling equipment. Background In oil and gas drilling operations, drilling and casing operations are indispensable procedures. In order to ensure that the water hole is not blocked, check valves are arranged in the drilling tool assembly and the casing string, and in order to ensure that the liquid column pressure in the drilling tool and the casing string water hole can balance the stratum pressure and avoid overflow in the water hole caused by failure of the check valves, the drilling fluid is filled in the water hole every 5-20 columns of drilling tools or casing strings. At present, for the water hole grouting of drilling tools and casing strings, the adopted grouting device comprises a slurry storage barrel, a grouting pipe and a drilling tool joint, such as a prior art CN205225174U grouting device, when grouting is needed, the grouting device is arranged above the drilling tool or the casing string, an annular gap between the drilling tool joint and the grouting pipe is communicated with the water hole, drilling fluid for grouting enters the grouting pipe through an inlet end of the grouting pipe and then enters the drilling tool water hole connected below the drilling tool joint through the grouting pipe, and at the moment, air in the drilling tool water hole is replaced by the gravity of the drilling fluid to enter the annular gap between the drilling tool joint and the grouting pipe and is discharged through an exhaust port of the grouting device. This can avoid "false overflow of drilling fluid" caused by the pressure pushing the drilling fluid due to the accumulation of air in the borehole of the drilling tool. When the drilling fluid is filled, the drilling fluid for grouting flows out from the exhaust port so as to judge when to finish grouting operation. However, when the grouting device is used for grouting, the following four defects exist: (1) Because the grouting pipe is positioned in the middle of the water hole of the drilling tool, the grouting drilling fluid is easy to be in a dispersed column shape when falling in the water hole of the drilling tool, and the air below the water hole is not enough to go upward, so that compressed air is formed; (2) During grouting, a small amount of drilling fluid can be taken out by an exhaust port of a grouting device along with the discharge of air, so that the illusion of full water hole filling is caused; (3) In the process of rising in the annular space, the pressure of the liquid column above the annular space is reduced to expand, so that the false overflow phenomenon of increasing the outlet flow is caused, and the judgment of overflow on site is interfered; (4) The grouting device has single function, can only be used for grouting, cannot establish circulation through the device when the drilling fluid in the well needs to be circulated under special conditions, and can establish circulation after the device is disassembled and connected with a square drill rod or a top driving device; in conclusion, the existing grouting device has single action and unsatisfactory field use effect, and severely restricts the normal operation and the acceleration and efficiency improvement of drilling operation. Although the prior art CN205577913U is a quick grouting device, which comprises a rotary joint, a handle, a conversion nipple, a universal joint, a rotary elbow, a high-pressure rubber tube and a male buckle, and the prior art CN204024580U is a drilling tool grouting joint, which solves the problems that the air in a drilling tool cannot be discharged during drilling tool grouting in the prior art, and well collapse and well control are easy to induce. But the problem that the drilling fluid overflows cannot be judged correctly is not solved. Therefore, a grouting device which is suitable for field operation, performs effective grouting, can accurately judge when overflow occurs, realizes drilling fluid circulation and ensures underground safety is needed. Disclosure of Invention In order to overcome the defects of the prior art, a recyclable grouting device, a recyclable grouting system and a recyclable grouting method are provided. The invention can realize effective grouting operation in the drilling tool and the casing string, and further avoid the generation of compressed air in the drilling tool and the casing string, thereby being convenient for accurately judging overflow during and after the operation of the drilling tool and the casing string in the field; In addition, the drilling fluid in the well can be circulated without connecting a square drill rod or a top driving device, thereby reducing the operation procedure, improving the saf