CN-116971726-B - Deep sea casing-while-drilling well completion equipment system and operation method thereof

CN116971726BCN 116971726 BCN116971726 BCN 116971726BCN-116971726-B

Abstract

The invention discloses a deep sea casing-while-drilling well completion equipment system and an operation method thereof, and relates to the technical field of drilling equipment. The casing running tool has the advantages of simple structure, no need of complex actions such as mechanical ball throwing, pressure holding, downward pressing, shearing and the like, capability of ensuring that the well bore meets the design depth and the shape ratio of the well bore to the jet pore forming rule by using the Zhang Yi drill bit assembly to finish rotary drilling construction of a casing well section, capability of directly carrying out drilling work of the next well bore without lifting the drill after casing placement, controllable technology and lower cost. The heavy hammer is put into the drill bit, the blade in the Zhang Yi drill bit can be opened, after the Zhang Yi drill bit finishes the preset workload, the heavy hammer is salvaged and recycled, the blade is retracted, and the drilling work of more than two times of wellholes is finished under the condition of not lifting the drill bit and replacing the drill bit through the expansion and recycling of the blade, so that the production efficiency can be greatly improved.

Inventors

QIN RULEI
HE GUOLEI
FENG QIZENG
LIU XIAOLIN
GAO JIEYUN
CHEN HAOWEN
QI LIQIANG
XU BENCHONG
YIN GUOLE

Assignees

中国地质科学院勘探技术研究所

Dates

Publication Date: 20260512
Application Date: 20230911

Claims (8)

1. The well completion equipment system is characterized by comprising a casing connecting nipple, a running tool, a steel cable fisher, a heavy hammer, a landing nipple, a Zhang Yi drill bit and a guiding drill bit; the running tool is arranged in the casing connecting nipple; the top of the running tool is connected with an upper kelly, the bottom of the casing connecting nipple is connected with the casing, the lower end of the Zhang Yi drill bit is connected with the upper end of the guiding drill bit, the upper end of the Zhang Yi drill bit is connected with the lower end of the landing nipple, the upper end of the landing nipple is connected with an inner flat drill rod, the heavy hammer is arranged inside the landing nipple and the inner flat drill rod, the heavy hammer is used for opening blades on the Zhang Yi drill bit, the upper end of the steel cable fisher is connected with one end of a steel cable, the bottom of the steel cable fisher is used for being connected with the top of the heavy hammer, the Zhang Yi drill bit comprises a shell, blades, a blade driving push rod and an elastic piece, the shell is a hollow rod, a plurality of through holes are formed in the middle lower part of the shell along the circumferential direction, stepped holes are formed in the upper part of the through holes, the top of the through holes are rotationally connected with the top of the blades, the upper part of the blades is provided with a guide groove which is gradually extended towards the upper blade of the shell, the upper blade is provided with a guide groove which is provided towards the lower blade of the upper blade of the shell, the guide groove which is gradually extends towards the upper blade of the shell, the elastic piece is arranged between the lower portion of the limiting ring and the bottom surface of the stepped hole on the blade driving push rod, a first internal thread used for being connected with the locating nipple is arranged at the top of the shell, a second internal thread used for being connected with the guiding drill bit is arranged at the bottom of the shell, the heavy hammer comprises a salvaging spear, a spring clip recovery pipe, a spring clip, a locating ring and a counterweight nipple, the locating ring is arranged at the top of the counterweight nipple, the spring clip recovery pipe is arranged above the locating ring, the salvaging spear is arranged above the spring clip recovery pipe, a plurality of through spring clip holes are formed in the middle lower portion of the spring clip recovery pipe along the circumferential direction, the bottom of the spring clip holes in the spring clip recovery pipe are rotationally connected with one ends of a plurality of spring clips, each spring clip corresponds to one spring clip hole, the top of the spring clip recovery pipe is connected with the middle portion of an elastic body, and the end of the spring clip recovery pipe is connected with the other ends of the elastic body, and the elastic body extends out of the spring clip holes.
2. The deep sea casing while drilling well equipment system of claim 1, wherein the running tool comprises a running tool nipple, a running tool body, a spring, a sliding block, a casing, a driving ring and a casing weight pin, threads are arranged on the outer walls of the upper part and the lower part of the running tool nipple, the upper part of the running tool nipple is used for being connected with an upper kelly, the lower part of the running tool nipple is used for being connected with an inner flat drill rod, the running tool body is sleeved in the middle part of the running tool nipple, the driving ring is arranged on the outer wall of the middle part of the running tool nipple and positioned in the running tool body, a sliding block is arranged in the running tool body, the upper surface of the sliding block and the lower surface of the driving ring are mutually matched inclined planes, one side of the sliding block, which is far away from the driving ring, is provided with the casing weight pin, one end, which is far away from the sliding block, of the sliding block penetrates through the running tool body, the casing weight pin is arranged between the casing weight pin and the inner wall of the running tool body, the driving ring is sleeved on the outer wall of the running tool nipple, the driving ring is provided with a driving ring, the sliding block is connected with the casing weight pin, and the casing weight pin is far from the bottom of the casing.
3. The deep sea casing while drilling well completion equipment system of claim 2, wherein a blade limiting mechanism is arranged on the outer wall of the shell and positioned at the top of the through hole, the blade limiting mechanism comprises a limiting plate, the top of the limiting plate is detachably connected with the shell, a limiting inclined plane is arranged at one side of the bottom of the limiting plate, which faces the shell, and the blade is tightly attached to the limiting inclined plane after being opened so as to limit the maximum opening angle of the blade.
4. A deep sea casing while drilling well equipment system as claimed in claim 3, wherein the resilient member is a coil spring.
5. The deep sea casing while drilling well completion equipment system of claim 4, wherein the landing nipple comprises a pipe body, a third internal thread used for being connected with the inner flat drill rod is arranged at the top of the pipe body, a first external thread used for being connected with the Zhang Yi drill bit is arranged at the bottom of the pipe body, a landing shoulder is arranged at the middle part in the pipe body, and a spring clamping shoulder is arranged at the upper part in the pipe body.
6. The deep sea casing while drilling well equipment system of claim 5, wherein the elastomer is a torsion spring.
7. The deep sea casing while drilling well completion equipment system of claim 6, wherein the steel cable fisher comprises a fisher body, a rotary single-acting mechanism and a salvaging hook, the rotary single-acting mechanism is arranged at the top of the fisher body, the salvaging hook is arranged at the lower part of the fisher body, a connecting part is arranged at the top of the rotary single-acting mechanism and used for being connected with the steel cable, the salvaging hook comprises at least two hook bodies, the middle parts of the hook bodies are rotatably connected with the fisher body, and an elastic reset piece is arranged between the tops of the hook bodies.
8. A method of operation of a well equipment system based on the deep sea casing while drilling of claim 7, comprising the steps of: The first step, under the natural state, the Zhang Yi drill bit does not work, the Zhang Yi drill bit drives the push rod to bear upward force due to the action of the elastic piece, and the knife blade is in a closed state at the moment; The second step, the drilling tool is lowered to the seabed mud surface, the hammer is put into the hammer to open Zhang Yi bit blades, the weight of the hammer is larger than the acting force of a push rod spring in the Zhang Yi bit, so that the blades drive the push rod to move downwards, the blades are pushed by a convex push plate on the blade drive push rod to be in an open state, the hammer is positioned in a landing nipple, the landing ring is contacted with a landing shoulder, the landing ring is supported by the landing shoulder, the spring clip is outwards popped out under the elasticity of a torsion spring, the spring clip is clamped with the spring clip shoulder, the hammer is clamped in the landing nipple, the blades in the Zhang Yi bit are kept in an open state, the state is a Zhang Yi bit working state when a surface layer casing is drilled, and the maximum outer diameter of the Zhang Yi bit blades is larger than the outer diameter of the casing after being opened, so that the well drilling work of the casing into a well section can be completed; Thirdly, after the drilling work of the casing pipe into the well section is completed, the heavy punch is salvaged and the cutter wing is ready to be recovered, after the Zhang Yi drill bit completes the preset work load, a steel cable fisher is put into the upper inner flat drill rod, a salvaging hook at the bottom of the steel cable fisher is combined with a salvaging spearhead of the heavy punch, the salvaging spearhead has differential characteristics, when the spearhead is pulled by the salvaging spearhead, a pipe connected with the spearhead compresses the bullet card to recover the bullet card, and the heavy punch after recovering the bullet card can quickly recover the heavy punch by using the steel cable so as to recover the cutter wing of the Zhang Yi drill bit; Fourthly, after the heavy hammer is lifted by the steel cable fisher, the push rod spring in the Zhang Yi drill bit drives the push rod to move upwards due to the compression and storage force, the knife wing is recovered, the drilling tool is pressed down and rotated forwards to unlock the casing running tool, so that the short section of the running tool is separated from the body of the running tool, and after the separation, the drilling tool assembly can continue to drill downwards to form a two-hole well; And fifthly, through the steps, the expansion and recovery cycle of the blade of the Zhang Yi drill bit is completed, and the cycle of the locking and unlocking working conditions of the running tool is completed, so that the whole set of casing-while-drilling well forming drilling tool equipment can be recovered by lifting the drilling tool, and well drilling operation is completed.

Description

Deep sea casing-while-drilling well completion equipment system and operation method thereof Technical Field The invention relates to the technical field of drilling equipment, in particular to a deep sea casing-while-drilling well completion equipment system and an operation method thereof. Background Casing while drilling is a drilling technique, which means that the casing is gradually lowered in the drilling process so as to be connected with a drilling pipeline, thereby protecting the well wall and stratum and ensuring the safety of a wellhead. The casing-while-drilling technology can timely improve the safety of a wellhead, reduce the risk of leakage of a stratum fluid and protect the well wall from erosion and collapse. The current technique of casing running while drilling used in deep sea drilling is mainly a method of "injection casing placement". The injection conduit is placed in the technical characteristics that a surface casing and a drilling tool assembly are integrated, the drilling tool is used for impacting a stratum through high-pressure large-displacement slurry instead of the rotary cutting stratum of a drill bit to form a borehole, the casing is lowered into the borehole along with the flushing of the drilling tool, and when the casing is lowered to a planned position, the impact of the slurry is stopped, so that the placement of the casing is completed. After the casing is put into the work, the set of drilling tool combination also supports the next drilling of the borehole without lifting the drill and replacing the drilling tool. The drilling tool can be separated from the casing by unlocking a special locking mechanism on the casing and the drilling tool, and the next borehole construction is performed by using a rotary drilling technology. The disadvantages of injection conduit placement are 1. Extremely dependent on the parameters of the earlier formation survey, if there are errors in the parameters, the actual injected wellbore depth will be much smaller than the calculated depth, 2. The maximum injection depth is limited, with the current limit depth being <90 meters. Disclosure of Invention In order to solve the technical problems, the invention provides a deep sea casing-while-drilling well forming equipment system, which can perform casing-while-drilling operation, complete drilling work of more than two times of wellbores, reduce the workload and the working time by 50% compared with the conventional reaming bit, and greatly improve the production efficiency. In order to achieve the above object, the present invention provides the following solutions: The invention provides a deep sea casing-while-drilling well completion equipment system which comprises a casing connecting nipple, a running tool, a steel cable fisher, a heavy hammer, a landing nipple, a Zhang Yi drill bit and a guide drill bit, wherein the running tool is arranged in the casing connecting nipple, the top of the running tool is connected with an upper kelly, the bottom of the casing connecting nipple is connected with the casing, the lower end of the Zhang Yi drill bit is connected with the upper end of the guide drill, the upper end of the Zhang Yi drill bit is connected with the lower end of the landing nipple, the upper end of the landing nipple is connected with an inner flat drill rod, the heavy hammer is arranged in the landing nipple and the inner flat drill rod, the heavy hammer is used for enabling a cutter blade on the Zhang Yi drill bit to open, the upper end of the steel cable fisher is connected with one end of a steel cable, and the bottom of the steel cable fisher is used for being connected with the top of the heavy hammer. The tool comprises a tool nipple, a tool body, a spring, a sliding block, a sleeve, a driving ring and a sleeve bearing weight pin shaft, wherein threads are arranged on the outer walls of the upper part and the lower part of the tool nipple, the upper part of the tool nipple is used for being connected with an upper kelly, the lower part of the tool nipple is used for being connected with an inner flat drill rod, the tool body is sleeved in the middle part of the tool nipple, the driving ring is arranged on the outer wall of the middle part of the tool nipple and positioned in the tool body, the sliding block is arranged in the tool body, the upper surface of the sliding block and the lower surface of the driving ring are mutually matched inclined planes, one side of the sliding block, which is far away from the driving ring, is provided with the sleeve bearing weight pin shaft, one end, which is far away from the sliding block, of the sleeve bearing weight pin shaft penetrates through the tool body, the spring is arranged between the sleeve bearing weight pin shaft and the inner wall of the tool body, and a limit groove is arranged on the inner wall of the sleeve connecting sleeve, and one end, which is far away from the sliding block, of the sleeve bearing weight pi